ANNUALREPORT2 O 1 6Vol.1: HighlightEditorial Board (April 2017 – March 2018)

Hideaki HOTCHI (Accelerator Division)

Seiko KAWAMURA (Materials and Life Science Division)

Hajime NISHIGUCHI (Particle and Nuclear Physics Division)

Makoto YOSHIDA (Cryogenics Section)

Shigeru SAITO (Transmutation Division)

Hirohito YAMAZAKI (Safety Division)

Shinji NAMIKI

Hiroya ISHIKAWA (Public Relations Section)

Cover photographs
Photograph ① : Thermo-mechanical simulator
Image credit: Stefanus Harjo

Photograph ② : High current bus bars and a large number of cooling-water
feedthroughs for the septum magnet in MR
Image credit: Masahiko Uota
Photograph ③ : Inner Barrel detector
Image credit: Yasuyuki Sugiyama

J-PARC Annual Report 2016
Contents
Preface……………………………………………………………………………………………………………… 1
Accelerators………………………………………………………………………………………………………… 3
Overview of the Accelerator…………………………………………………………………………………… 3
LINAC………………………………………………………………………………………………………… 6
RCS…………………………………………………………………………………………………………… 9
MR………………………………………………………………………………………………………… 12
Materials and Life Science Experimental Facility………………………………………………………………… 15
Overview…………………………………………………………………………………………………… 15
Neutron Source…………………………………………………………………………………………… 16
Neutron Science…………………………………………………………………………………………… 17
Neutron Devices…………………………………………………………………………………………… 18
Muon Source and Science………………………………………………………………………………… 19
Technology Development………………………………………………………………………………… 20
Particle and Nuclear Physics……………………………………………………………………………………… 21
Neutrino Experimental Facility……………………………………………………………………………… 21
Hadron Experimental Facility……………………………………………………………………………… 22
Strangeness / Hadron Physics Experiments………………………………………………………………… 22
Kaon Decay Experiments…………………………………………………………………………………… 22
Muon Experiments………………………………………………………………………………………… 23
Highlights-1: The World’s First Indication of Non-conservation of CP Symmetry in the Neutrino Sector……… 23
Highlights-2: First strains of KOTO from J-PARC: Exploring new physics through rart kaon decays ………… 25
Highlights-3: Full Scale Investigation of Multi-Strangers’ World Has Begun………………………………… 27
Cryogenics Section ……………………………………………………………………………………………… 29
Overview…………………………………………………………………………………………………… 29
Cryogen Supply and Technical Support…………………………………………………………………… 30
Superconducting Magnet System for T2K………………………………………………………………… 30
Superconducting Magnet Systems at MLF………………………………………………………………… 31
Superconducting Magnet Systems at HEF………………………………………………………………… 31
R&D for the Future Projects at J-PARC……………………………………………………………………… 32
Information System……………………………………………………………………………………………… 33
Overview…………………………………………………………………………………………………… 33
Status of Networking……………………………………………………………………………………… 33
Internet Connection Services for Visitors and Public Users of J-PARC ……………………………………… 35
Status of Computing ……………………………………………………………………………………… 36

Transmutation Studies…………………………………………………………………………………………… 37
Overview…………………………………………………………………………………………………… 37
Design of the Transmutation Experimental Facility (TEF)…………………………………………………… 39
Research and Development………………………………………………………………………………… 41
Other Activities and International Collaboration…………………………………………………………… 45
Safety ……………………………………………………………………………………………………………… 47
Safety……………………………………………………………………………………………………… 48
User Service ……………………………………………………………………………………………………… 51
Users Office (UO)…………………………………………………………………………………………… 52
User Statistics……………………………………………………………………………………………… 54
MLF Proposals Summary - FY2016………………………………………………………………………… 55
J-PARC PAC Approval Summary after the 23rd Meeting…………………………………………………… 56
Organization and Committees…………………………………………………………………………………… 59
Organization Structure……………………………………………………………………………………… 60
Members of the Committees Organized for J-PARC………………………………………………………… 61
Main Parameters ………………………………………………………………………………………………… 65
Events ……………………………………………………………………………………………………………… 67
Events……………………………………………………………………………………………………… 67
Publications……………………………………………………………………………………………………… 75
Publications in Periodical Journals………………………………………………………………………… 76
Conference Reports and Books…………………………………………………………………………… 81
KEK Reports………………………………………………………………………………………………… 86
Others……………………………………………………………………………………………………… 86
JAEA Reports……………………………………………………………………………………………… 86

J-PARC Annual Report 2016

Preface1

PrefaceThis volume describes the activities of J-PARC from April 2016 through March 2017,
Japanese fiscal year 2016 (JFY2016).
J-PARC (Japan Proton Accelerator Research Complex) is a multi-purpose researchfacility based on world-class high-intensity proton accelerators built through the joint
efforts of the High-Energy Accelerator Research Organization (KEK) and the Japan
Atomic Energy Agency (JAEA). In a wide range of research fields, including materials andlife sciences, elementary-particle and nuclear physics and research and developments
for nuclear transmutation, we aim to make significant contributions to the advancementof humankind by promoting diverse research and developments covering basic science
to industrial applications.
In JFY2016, the neutrino oscillation experiment T2K reported a hint of CP
violation in the neutrino sector. It represents the beginning of another exciting era
for the fundamental physics, where one of the major questions is “why our universe ismatter-dominant?”. Studies to answer the question are also conducted at the Hadron
Experimental Facility. The KOTO experiment to search for CP violating decays of neutralkaons has also started to produce its first physics results. In addition, the searches for
multi-strangeness nuclei are expanding towards their full-scale investigation, where
candidates for double hyper-nuclei are reported. Furthermore, the studies are now
extended to cover the muons, including a search for muon-to electron conversion,
COMET experiment, and precision measurement of the dipole moments of muons,Preface

J-PARC Annual Report 2016

2

muon g-2/EDM@J-PARC.
In the Material and Life Science Facility (MLF), we decided to aim for the highest
possible availability to provide a stable beam across the neutron and muon beams
for users. A new target vessel is under construction with the goal to provide the mostrobust and power-resistive system, so meanwhile, we have operated the MLF with apower as low as 200 kW to ensure stability and to prolong the life of the target vessel.
Even with the low-power operation, we and the users were able to produce many
significant results, which were announced in our press releases. The number of thosereleases has doubled compared to year 2015. Furthermore, the potential industrial
applications were explored further. These results are reported briefly in this volume
and in more detail in the separate volume dedicated to the MLF results.
In this volume, we also report the various advancements in the R&D for theaccelerator driven system (ADS) for nuclear transmutation.
We would like to share all these outcomes widely with the world community.
Furthermore, we would like to contribute to the society by enhancing the collaboration
with universities, research institutions, and industries not only by producing andsharing our results, but also by creating the next generation of researchers with anextensive experience in cutting-edge facility operation, who can, in turn, produce thenext generation of research facility for the future.
“High power beams for the next stage of our life!”

Naohito SAITO
Director of the J-PARC CenterAccelerators

Overview of the Accelerator
The J-PARC accelerator complex consists of a
400 MeV linac, a 3 GeV Rapid Cycling Synchrotron(RCS) and a 30 GeV Main Ring synchrotron (MR). A proton beam from the RCS is injected to the Materials andLife Science Experimental Facility (MLF) for neutron2

Accelerator MLF
Status
MR

3

4

5

6

and muon experiments. The MR has two beam extraction modes; fast extraction (FX) for the Neutrino
experimental facility (NU) and slow extraction (SX) for
the Hadron experimental facility.

7

8

9

10 11 121

Tuning/study
Maintenance
FX

SX
Fig. 1. Accelerator operation in FY2016.

FX

2

3

Accelerators

J-PARC Annual Report 20164
The operation in FY 2016 is illustrated in Fig. 1. The
topics related to the beam operation are as follows:(1) Operation for the MLF
Due to damage incurred in November 2015 at
500-kW power, the neutron target was replaced with aspare one. After that, we delivered beam at the lower
risk power of 200 kW. To improve the quality of theexperiments even at the lower beam power, the linac
and the RCS have provided a one-bunch beam insteadof the regular two bunches, which creates a shorter
pulse, preferred by some fast-TOF and muon users.
At the beginning of the new fiscal year, we delivered beam to the MLF by April 4, 2016, as scheduled.
But during the maintenance period that followed, avacuum leak occurred at one of the collimators in the
RCS and it took about a week to rectify it.
We decided not to replace the target in the summerof 2016. So, the beam power was reduced from 200 to
150 kW in November to expand the target lifetime until
a new robust target is ready.
(2) Operation for the Neutrino Experiments
The user run of the MR-FX was started at about 400
kW in April, when the operation resumed after fixing
the problem with an MR bending magnet and the RCS
collimator. The beam power was gradually increased
to 460 - 470 kW by the end of March 2017, thanks to a
device upgrade and parameter tuning.
(3) Operation for the Hadron Experiments
We had SX beam time for one month from the endof May to the end of June. The beam power was about
42 kW, the same level as in FY 2015, but the quality ofthe beam and especially such characteristics as extraction efficiency and duty factor were improved due tosome parameter optimizations.

Table 1. Operation statistics in hours in FY2016.
Facility

User Time(hours)Trouble, Acc.only(hours)Trouble, Fac.only(hours)Net Time(hours)Availability, toral
(%)

MLF

3,743

257

2

3,483

93.1

Neutrino
(FX)

3,532

570

235

2,726

77.2

Hadron
(SX)

612

92

4

515

84.1

For MLF users

For MR users
LINAC/RCS Tuning,
total, 953

Srartup,etc. (1), 1276

LINAC/RCS
Tuning, 893
Trouble, 60

Trouble(Exp),
2
Trouble(Acc), 257

Trouble, 9
MLF users
3483

MLF users total, 3743

3NBT/MLF Tuning
total, 297
3NBT/MLF
Tuning, 287

Srartup, etc. (2), 593

LINAC/RCS Tuning,
total, 953

HD users, total,
612

LINAC/RCS
350BT/MR/FX/SX
Trouble(Acc),
Tuning, 893
Tuning total ,92579
HD users,
Trouble,60
515 Trouble(Exp),
350BT/MR/FX/SX
4Tuning, 568
Trouble(Exp), 235
Trouble, 11
Trouble(Acc), 570
NU users,
2726

NU users, total,
3532

Fig. 2. Operation statistics in FY2016. The total operation time was 6,271 hours.

J-PARC Annual Report 2016

Accelerators

5
The operation statistics in FY 2016 are shown in
Table 1 and Fig. 2. The total operation time, which wasshift leaders’ on duty time at the control room, including startup and RF conditioning, was 6,271 hours. The
net user operation hours and the beam availability rate
for each experimental facility were as follows: 3,483
hours (93%) for MLF; 2,726 hours (77%) for NU; and 515
hours (84%) for HD. These statistics show that the linac
and the RCS operated properly.
The down time by components is shown in Fig. 3.
There were several causes of downtimes.
Compared to the last year, the linac had generally
become more stable. The top cause of the downtime
was a group of HVDC (High Voltage DC power supply
for klystrons). Several defects in this group included a
klystron failure, HV insulation breakdown, and failuresof the switching devices and modules. The linac uses
twenty 324-MHz klystrons and twenty-five 972-MHz
klystrons. Most of the 324-MHz klystrons have beenused from the beginning of the linac operation in 2006.

(429)

Downtime (hours)

BLM
RFQ
MEBT1
DTL
SDTL
DBNCH_old
MEBT2
ACS
DBNCH
HVDC
IonSource
NagnetVAC
Others
BLM
KMPS
BM
QM
SM
ST
Bump
Sep
RF
OthersBLM
Others
BLM
QM
SM
BM
ST
RF
Injction
SlowExt
FastExt
OthersMLF
HadronNeutrino
Earthquake
PowerOutage
othere192:00:00
168:00:00
144:00:00
120:00:00
96:00:00
72:00:00
48:00:00
24:00:00
0:00:00

We suppose that after over 50,000 hours of operation,these klystrons have come to the end of their lives.
The RCS was generally stable, except for a single
vacuum leak at the collimator in April 2016. This is indicated in the “RCS-Others” group in Fig. 3. The leaked
collimator unit was replaced with a temporary spareduct and the operation resumed.
There were several downtimes at the MR that lasted
a few days. We had a water leakage from a coil at thebending magnet (group in “MR-BM”) in March 2016.
Also, a small animal entered an outdoor transformer
in May (group in “MR-Others”). Some of the troubles
came from new components for the performance
upgrade. We took care of them, by mostly grounding
for noise suppression.
Most of the improvement and upgrade work
was carried out during the summer shutdown. These
improvement items, major downtime causes, andbeam power history are described in further chapters.

_LINAC__RCS__3NBT_

Fig. 3. Downtime by components in FY2016.

_MR_

_EXP_

_Others_

Accelerators

J-PARC Annual Report 2016

6

Linac
80
RUN#68Beam Current [mA]70

RUN#69RUN#70

RUN#71

RUN#72

RUN#73

60
50
40
30
20
10
7
1-

M

ar

-1

17
bFe
1-

1-

Ja

n-

17

6
ec
D
1-

1-

-1

6
N

ov

-1

6
ct
O
1-

pSe
1-

-1

16

6
1-

A

ug

-1

6
l-1
Ju
1-

1-

Ju

n-

16

6
-1
ay
M
1-

1-

A

pr

-1

6

0

Date

Fig. 4. Operation history of the ion source in FY2016.

The J-PARC linac has been operated with thepeak beam current of 40 mA for users’ operations. A
cesiated RF-driven negative hydrogen ion source has
been providing successfully the required beam without any serious problems. The operation history of theion source in FY2016 is shown in Fig. 4. In RUN#68, thebeam run cycle was extended from 1.5 to 2 months.
Approximately 1,350 hours continuous operation wasachieved with a beam current of 45 mA in RUN#68. The
spark rate occurring at the ion source beam extractor isa few times per week, which is an acceptable level forusers’ operations.
We monitored the RFQ RF-trip approximately
15 times per day and it did not change significantly
from the 30-mA operation last year.
The number of trips in the SDTL06 increased significantly just after the 2016 summer maintenance. We
assume that the situation was caused by a long-term
exposure to the atmosphere during the maintenanceperiod. The trip frequency decreased as the operation
went on, and reached an acceptable level. Currently, thetotal trip rate of all DTL/SDTL cavities is about 0.5 times
per day. After the earthquake in 2011, we could not
input an rf power into some SDTL cavities in the range
of approximately 250 to 450 kW due to the multipactor. In 2015, we confirmed that surface cleaning withacetone solves effectively the multipactor problem

by applying it to the SDTL05B cavity. The same treatment was applied to the SDTL05A, 06A and 06B in thesummer of 2016, and it has eliminated or reduced themultipactor region to tolerable levels, as shown in Fig. 5.
The ACSs were stably operated in comparison withthe other structures. The number of trips of all the ACS
cavities was about 0.3 times per day. This trip rate wasless than one-third of that observed at the initial operation period of the ACS.
The RF chopper system, which is installed just after
the RFQ, consists of two RF-deflecting cavities and abeam scraper. Until the summer of 2016, the cavities
were connected in series with a coaxial line and powered by one RF power system. The large ringing on
the RF falling of the intermediate-pulse was probably
triggered by the reflected wave from the downstream
cavity, and it caused beam loss at the RCS. The ringing
problem was solved by supplying the RF power to thetwo cavities independently by installing an additional
RF power system in the 2016 summer maintenance. In
FY2016, the chopper system was operated for 9 months
at 40 mA. The results from the observation of the usedscraper surface after 9 months operation using thelaser microscope are shown in Fig. 6. A shallow craterof approximately 0.15 mm in depth was generated at
the scraper surface, where the beam is irradiated, as we
expected.

J-PARC Annual Report 2016

Accelerators

7
3.50

SDTL06 Tank A

2.50

Multipactor
region

2.00
1.50
1.00

SDTL06 Tank A
SDTL06 Tank B

3.00

VSWR

VSWR

S06

SDTL06 Tank B

3.00

3.50

2.50

disappeared

2.00
1.50

200

400

600

800

1000

1200

Klystron Output Power [kW]

1.00

200

400

600

800

1000

1200

Klystron Output Power [kW]Fig. 5. VSWR as a function of the klystron output power at SDTL06 before (left) and after (right) surface cleaning.

We have been using two types of klystron suchas 324-MHz klystron and 972-MHz one. The operation times of the two types of klystrons, as of March
2017, are shown in Fig. 7. Many of the 324-MHz klystrons exceeded 50,000 hours of operation. In FY2016,
we replaced two klystrons due to their performancedegradation. A total of seven 324-MHz klystrons were
replaced from the beginning of the linac operation.
We are apprehensive that those klystrons may come tothe end of their life in the near future. Most of the 972MHz klystrons reached 20,000 hours of operation. We
replaced one of those klystrons in FY2016.
The linac operation was suspended several times
due to the failure of the anode modulator in the klystronRF system. The failure was caused mainly by malfunction of a bias power supply, which is submerged in

the modulator oil tank. We estimate that the temperature of the power supply rises to approximately 80°C,
therefore the chemical capacitor in the power supply
assemblies seems to have deteriorated during the long
operation. As a countermeasure, we will develop a new
type of power supply with high resilience under hightemperature conditions, which will replace the old one.
Presently, we are constructing a klystron test-stand in
the linac building in order to conduct off-line klystron
conditioning and develop various new devices, such asa new bias power supply and so on.
Cooling water issues causing beam stops forseveral hours occurred after the 2015 summer maintenance. The cooling water flow rate at DTL decreased
significantly, especially at DTQ. In the 2016 summer
maintenance, we applied extensive countermeasures

Fig. 6. Observation of scraper surface after 9 months operation.

Accelerators

J-PARC Annual Report 2016

8

60,00025,000

HV-ON time of 324MHz Klystrons

to 2017/March/31

Used Klystrons

50,000

HV-ON time of 972MHz Klystrons

to 2017/March/31

Used Klystrons

50,000Time (h)Time (h)40,00030,00015,00010,000

Klystron station (Serial number)᾽17 Jan 25

᾽15 Nov 24

᾽15 Dec 25

DB1(0501)

DB2(0804)

ACS18(0902)

DB1(1304)

ACS11(1002)

ACS21(1001)

ACS20(0802)

ACS19(0903)

ACS18(1302)

ACS17(0806)

ACS16(1301)

ACS15(0809)

ACS14(1003)

ACS13(1104)

ACS12(1107)

ACS9(0803)

ACS11(1303)

ACS8(0810)

ACS10(0901)

ACS7(1101)

ACS6(1105)

ACS5(0801)

ACS4(1106)

ACS3(0807)

ACS2(1102)

ACS1(1103)

M2B2(0808)

0

SDTL15(0211)

SDTL13(0209)

SDTL6(0207)

DTL3(0202)

DTL2(0205)

RFQ(9902)

DTL1(0204)

SDTL16(0210)

SDTL15(1101)

SDTL14(0203)

SDTL13(0801)

SDTL12(0104)

SDTL11(0216)

SDTL9(0212)

SDTL10(0401)

SDTL8(0103)

SDTL7(0215)

SDTL6(0901)

SDTL5(0208)

SDTL4(0101)

SDTL3(0102)

SDTL2(0206)

DTL3(1001)

DTL2(0213)

SDTL1(0201)

RFQ(0214)

DTL1(1401)

0M2B1(0001)

5,000

᾽14 Jun 3

᾽14 Feb 27

᾽16 Sep 6

᾽16 Sep 5

᾽13 Feb 22

10,000᾽16 Mar 2

᾽12 Apr 3

20,000

Klystron station (Serial number)

Fig. 7. Operating time of 324-MHz (left) and 972-MHz klystron (right) as of March 2017.

to solve the problem. We used a fiberscope and foundobstructions in the DTQ magnet cooling pipes causedby contaminant particles. We also identified the material clogging the SDTL-quadrupole magnet as copperoxide, which was eventually removed. We removed
these foreign materials. In addition, the primary cooling water line was split into two parts and an additional
water pump was installed to improve the water flow
rate. The measures stabilized the flow rates and currently no frequent flow-adjustment work at shortintervals is necessary.
We continue to make efforts to mitigate the beamloss. In order to perform the longitudinal beam matching study, bunch shape monitors with improved
vacuum behavior and reduced pumping requirements
were developed and installed at the MEBT1 and ACS1
sections. To investigate a beam loss caused by a residual
Tx/Tz=0.3
Tx/Tz=0.7
Norm.(T=1.0)
Tx/Tz=1.3
Tx/Tz=0.3,tank96%
Tx/Tz=0.3,tank94%
Tx/Tz=0.3,tank90%

BLM signal(a.u.)

1.0
0.8

gas scattering, the wire-scanner at MEBT2 was replacedwith a new version which was designed for profile measurement of the H0 particles.
In the previous theoretical and experimental studies, the Intra Beam Stripping (IBSt) was found to be thedominant source of beam loss in the linac’s 200~400
MeV part. To minimize the beam loss due to the IBSt,
further beam studies have been carried out for an
optimum compromise between linac stability and minimum IBSt. Transverse and longitudinal redesign studies
were completed and as the result, we found more candidate settings with IBSt loss mitigated by more than
50% at around 95% of ACS tank level and temperature
ratio (Tx/Tz) of 0.3, as shown in Fig. 8. Further studies
will be conducted to achieve a full lattice optimization
for the beam loss and RCS injection for the coming
50-mA user operation.

Unstable
Previous bestComparison
Stabilized
Stabilized
Near z-accept.

0.6
0.4
0.2

DB1

ACS18

ACS11

DB2

DB1

ACS21

ACS20

ACS17

ACS16

ACS15

ACS14

ACS13

ACS11

ACS10

ACS9

ACS8

55
ACS21
ACS19

50
ACS18

45

BLM#

ACS7

ACS6

ACS5

ACS4

ACS3

40
ACS2

ACS1

M2B2

M2B1

35
ACS01

ACS12

0.0

Klystron station (Serial number)

Fig. 8. Measured beam loss at beam loss monitors for the transverse andlongitudinal redesigning for the J-PARC linac ACS section.

J-PARC Annual Report 2016

Accelerators

9

RCS
Operational status
The output power produced by the RCS in the
beginning of fiscal year 2016 was 200 kW for the MLF
and 40 kW for the MR (corresponding to an MR output
power of 400 kW). Since we did not have a spare neutron target, the output power for the neutron target
was suppressed to less than 200 kW for its protection.
After MR switched operation to the Hadron Experiment,
the radiation dose decreased to 5 mSv/h six hours after
the beam stopped. Furthermore, after a two-monthcooling-off period, it decreased to less than 1 mSv/hduring the maintenance work.
Because the new neutron target was not available
on time, the output power was reduced to 150 kW after
the summer shutdown period. On the other hand, theMR output power was increased due to the progress of
the MR commissioning. Figure 8 shows a history of theoutput power from the RCS.
5.00E+019

MLF:200 kW
Nu:>400 kW
MLF:200 kW
HD:>40 kW

Particles [#/day]

4.00E+019

MLF:150 kW
Nu:>470 kW

3.00E+019

2.00E+019

1.00E+019

0.00E+000
2016/04/01

2016/07/01

Collimator failure

2016/10/01

2017/01/01

2017/04/01

Date

Fig. 8. History of the output power from RCS.

During the short maintenance period in April 2016,
one of the ring collimators was broken. A defect of
the control system caused a vacuum leak in the fifth
secondary collimator chamber. Since the numericalsimulation results indicated that the beam loss without this collimator would be acceptable, we installeda spare straight duct instead of repairing the broken
collimator. This measure reduced the repair period by
8 days. The availability of the RCS was worse than thatin the previous year due to this accident. Its operation
time for the MLF over the year was approximately 3484
h, excluding commissioning and start-up time with adown time of approximately 257 h; therefore, its availability was about 93%. The most significant reason forthe down time was the collimator failure.

Maintenance and improvements
1) Replacement of the broken collimator
The beam collimation system removes the beam
halo and localizes the beam loss to preserve the otheraccelerator components. The collimation system comprises one primary collimator, which scatters the halo
particles, and five secondary collimators, which absorb
those scattered particles. The radiation shielding
around the collimator chamber was designed in sucha way that the collimator system could absorb a halo ofat most 4 kW. In April 2016, a malfunction occurred inthe VME system, i.e., the collimator’s control system. We
conducted a performance test to remedy this problem
but a vacuum leak occurred during the test. The vacuum pumps stopped abruptly due to sudden vacuum
deterioration, and the area around the vacuum deterioration point was immediately isolated by the gate
valves.
After an investigation, it was found that the fifth
secondary collimator was the source of the leak, which
was caused by a collision of the collimator blocks. We
needed to repair it quickly, but it was highly activated,
and we did not have a spare of the fifth secondary collimator. We then looked for a temporary solution, andthe numerical simulation results indicated that thebeam loss without this collimator would be acceptable.
We therefore installed a spare straight duct instead ofrepairing the broken collimator.
After the resumption of the user operation,
the residual dose in the arc area was not as high as
expected. However, there was a step in the new duct
due to the difference in the flange diameters of the
upstream and downstream ducts, and a dose of at most
10 mSv/h occurred at this point. Following our temporary repair, we made a fixed collimator to replace thespare duct, and it was installed during the summer
shutdown period. Figure 9 shows the photographs ofthe spare straight duct and the fixed collimator. When
we installed the new fixed collimator, the residual doseon contact of the collimator was reduced to less than
1 mSv/h. The control system was also replaced with amore robust system. All collimator positions can now
be independently monitored by additional potentiometers, and this improvement prevents the collision of
the collimator blocks.

Accelerators

J-PARC Annual Report 201610
Temperature [°C]
1400
1169

1375

938
487

708

1150

337

477

1025

292

246
15

665

67

35

51, 5041, 46

164, 141

169

122, 114

178, 144

Temperature [°C]20025, 28141, 138

108(Ferrite at upper edge)

77

159, 141

179, 145

23, 26

172, 16346
15145, 144

232, 208291
52, 54138

148, 153

38
86, 5627, 27

Calculated Measured
temperature temperature

28, 28

Unit: °C Room temperaturer: 15°C

Fig. 9. Temporary spare duct and new collimator.

Fig. 10. Kicker baking system.

2) Kicker baking system
To date, vacuum pressure has not been a criticalissue in the RCS; however, a demonstration of highpower operation indicated that the beam loss wascaused by pressure increase. We considered that there
are two major sources of outgassing: the injection foil
and the ferrite yokes in the kicker magnet chamber.
Improvements to the injection foil are now in progress,
and an in situ bake-out system for the ferrite yokes had
been developed and was installed during the summer2016 shutdown period. In order to achieve effective
degassing, the temperature of the yokes should be
as high as possible. Moreover, the temperature of thevacuum chamber must be limited to avoid thermal
expansion. Thus, we had developed thermal radiation
shields to suppress heat transmission from the heater
to the chamber wall. The target temperatures are morethan 120°C for the ferrite yokes and less than 30°C for
the chamber wall.
Figure 10 shows the temperatures of the chamber
and yokes with the thermal radiation shields in place,investigated by a calculation and an experiment. The
increases in temperature was 140–240°C at the yokes
and less than 20°C at the chamber wall, indicating thatthe target temperature was achieved. After the installation of this system, the ferrite yokes were baked, andthe thermal expansion of the vacuum chamber was lessthan 1 mm. The vacuum pressure was improved from 1-5-6
× 10 Pa to 1 × 10 Pa.
3) Improvement of the sextupole magnet
Previous beam study results indicated that one
possible scenario for suppressing beam instability is
to import incoherency via large negative chromaticity.
Based on these study results, we needed to increase thechromaticity effect during the latter half of the acceleration cycle. In addition, we also needed to correct
the chromaticity during the first half of the acceleration cycle to suppress emittance growth. However, only
positive or negative chromaticity could be generated
by the previous power supply system for the sextupole
magnets. We therefore upgraded the power supply system to a bipolar system.
Residual dose distribution and exposure during
maintenance
Since the output power for the MLF was limited, theresidual doses in the RCS were sufficiently small. A total

J-PARC Annual Report 2016

Acceleratorsof 41 workers were exposed to a dose of more than 0.01
mSv during the summer shutdown period, and the corrective dose for these workers was 1.99 mSv. Only threeworkers were exposed to a residual dose of more than
0.1 mSv, and the maximum dose received by any one
worker was 0.19 mSv. The number of workers who were
exposed to a dose of more than 0.01 mSv increased
compared with the previous fiscal year; however, thecollective dose was significantly reduced, which can be
attributed to the establishment of a foil maintenanceprocedure, low output power for the MLF, and no serious work being conducted near the injection area. The
maximum dose incurred while replacing the broken
collimator with the temporary spare duct was 0.6 mSv,
whereas that from replacing the temporary duct with
the new collimator was only 0.1 mSv. This was due tothoroughly preparing for the work, having sufficientcooling time, rotating the workers and the presence of
local shielding.
Beam commissioning
1) Bipolar sextupole excitation test to suppress
instability
We investigated the tune variation during theacceleration process to reduce the beam emittance for
reduction of the MR beam loss. A better condition for
reducing the beam emittance was obtained; however,this condition enhanced beam instability. A better solution is to correct the chromaticity in the first phase of
the acceleration cycle and to enhance it in the middle
and final phases. We tested a new power supply system
for the sextupole magnets to realize such chromaticity control, and confirmed that the instability had been
suppressed.
2) Low beam emittance for the MR
We investigated the mechanism of emittance
growth by numerical simulation. The results revealed
that the emittance growth was caused by the resonances νx = 6, νy = 6, and 2νx − 2νy = 0 during the first 8
ms of acceleration. From this analysis result, we tried tomitigate the emittance growth by adjusting the operation tune away from those resonance lines. The results

RMS emittance (� mm mrad, un-normalized)

11

8
Old Parameter
7

6

5

New Parameter
12
3
4
Parameter ID

Fig. 11. Extraction beam emittance measurement results.

are shown in Fig. 11. The emittance growth was well
mitigated by the new parameter, as predicted by thenumerical simulation.
Summary
In the current year, the output power of the MLF was
initially maintained at 200 kW and then decreased to
150 kW after the summer shutdown period. The beam
power for the MR, however, was satisfactorily increased
to the equivalent of 700 kW. We temporarily substituted
a spare duct for a broken collimator, and the spare duct
was then replaced by a new collimator in the summer
shutdown period. An in situ baking system for the kicker
magnets and a bipolar power supply system for the sextupole magnets were also installed during the summer
shutdown period. The operation tune and chromaticity
were adjusted so as to move the beam away from theresonance lines and, as expected, we obtained a small
beam emittance.

Accelerators

J-PARC Annual Report 2016

12

MR
Overview
The Main Ring synchrotron (MR) of J-PARC supplies
the 30-GeV proton beam alternatively to the neutrino
experimental facility in a 2.48 s period or also to thehadron experimental facility in a 5.52 s period. The former operation mode is called fast-beam extraction (FX)
mode and the latter one is slow-beam extraction (SX)
mode.
Figure 12 shows the beam power history of MR in
JFY2016, the regular operation for the FX started at 390
kW during JFY2016 and the beam power was finally
increased up to 470 kW in February 2017. For the SX
mode beam power of 42 kW was also reached.
However, MR had many troubles, which stopped
the beam operation for several days. These troubles aredescribed in the next section.
The design beam power for FX is 750 kW. It will
be achieved by reducing the beam cycle from 2.48 s to
1.3 s after new magnet power supplies and other new
equipment are installed.

(2) A short circuit of transformer of the injection
septum magnet happened. The circumstantial evidence in the transformer indicated that the trouble
was caused probably by an animal entering the active
part of the transformer. Thus, after the transformer was
replaced, a cover was set in the cable duct to prevent
intrusions of wild animals into the equipment.

TroublesThe main troubles are summarized as follows. The
numbers of the items below correspond to ones in Fig.
12.

(4) The transformer in the power supply of RF cavity
was damaged by significant overheating. Normally, theelectric device connected to the transformer is turnedon just in the beginning of the operation and turned
off automatically by the control system. However, thedevice was not switched off by the control systembecause large electric noise from the grounding kept
the device turned on. This problem was fixed by adding a second grounding point.

600

J-PARC
MR beam power

[kW]
500

(4)
(1)

(2)

(3)

Beam power

400(3) Electrical trouble occurred in the power supply
for the new injection septum magnet installed in the
beam line for the future 1.3 s operations. As large noisefrom grounding turned on some IGBTs simultaneouslyof the AC-DC converter stage in the power supply ofthe magnet, huge current flew in the IGBT from thecapacitor bank. Eventually, the IGBT sustained serious
damages by the temperature rise due to the rushedcurrent. The damaged IGBT stage was removed andthe power supply was retuned and operated until thesummer maintenance period of 2016 with insufficientnumber of IGBT stages.

300

200

100

0
04/01/2016

06/01/2016

08/01/2016

10/01/2016

12/01/2016

02/01/2017

04/01/2017

DateFig. 12. MR beam power history (JFY2017)(1)~(4) show the troubles described in the report(1) The main bending (dipole) magnet BM-67 hada short circuit between the layers of the hollow coils of
the magnet caused by leaked water from the brazing
point of the coil. The magnet was replaced by a spareone. It was assumed that the brazing material of thehollow coil probably had some defects. However, it is
not easy to cut the coil in order to investigate the reason because the BM-67 magnet is a radioactive object.

Almost all troubles are triggered by noise from thegrounding of the power supply. Recently, many newpieces of equipment were installed in the power supply building. As a result, the wiring of the groundinglines of the power supplies became too cluttered. The
rearrangement of the wiring still continues.
SX mode operation
The assigned period for SX mode operation was
limited during JFY16. All in all, 515 hours of beam weredelivered out of the 612 scheduled hours. This means
an availability of the SX mode of 84%, which was lessthan the J-PARC goal of 90% availability. However, thebeam quality was improved in JFY2016, so that the42-kW beam had a sufficient efficiency (>99.5%) and
improved the duty factor (>52%) by suppression control of instabilities and implementation of extraction

J-PARC Annual Report 2016

Accelerators

13
feedback.
The SX beam studies at 50 and 60 kW were promising. The administrative limit on the present target will
be lifted slightly to allow a regular 50-kW operation.
Further increases of the beam power will require an
upgraded target and further mitigation of the beamloss.

Fractional Current Deviation @ 800 A

FX mode operation
In JFY2016, the MR delivered beam on target for
the T2K neutrino experiment with an availability of
77%. The detail was that 2726 hours of beam weredelivered out of 3532 hours scheduled. The availability for FX was insufficient. However, the 14% beam
unavailability to the FX users was caused by accelerator problems in 2016, whereas the rate fell to only 4%during the first two months of 2017.
The beam power to T2K increased from 390 kW to470 kW. This beam intensity is equivalent to 900 kW if
the beam cycle time were 1.3 s, instead of 2.48 s.
During the FX operation at 470 kW, the total beamlosses were limited below 800 W in one cycle. The loss
was localized at the collimation area which can accept
a maximum of 2 kW.
10–4

OLD QFRPSNEW QFRPS

10–5

IGBT Frequency
600 Hz-(Old) 2000 Hz (New)

10–6
10–7
10–8
10–9

10

102

103

104

Frequency [Hz]Fig. 13. Spectrums of the current ripple. Blue: Old power
supply, Red: New one. Data was taken at the flat
top of SX-mode pattern.

The beam study at 496 kW had a beam loss of 1.1
kW in total. Although this is an acceptable loss underthe existing collimation system, the loss is not tolerable
as nominal operation because a net loss increase in thelarge dispersive region is not desirable.
Furthermore, the beam studies were carried out
with a beam intensity of 140 kW in two bunches, whichcorrespond to a 1-MW beam power with 8 bunches
and a faster ramping cycle. As the total losses were 350
W, it was estimated that the loss of the 1-MW operation
was 1.4 kW.
New magnet power supply
It is necessary to reduce the cycle period from 2.48
s to 1.3 s in order to increase the repetition rate for the
MR and achieve the original beam power goal of 750
kW. However, it is hard to modify the exiting magnet
power supplies. Thus, the development of new power
supplies had been started. The first new power supply for the Q-magnet has been assembled and tested
with a real magnet load in the J-PARC. The stable
operation with 1.3 s repetition period was confirmed.
Furthermore, it was also confirmed that the current
ripple at the flat top for SX mode operation was almost
10 times smaller than that of the old one at the lower
frequency region, as shown in Fig. 13.
Summary
MR had many troubles with several power supplies
in JFY2016. However, MR increased successfully thebeam power up to 470 kW for the FX mode and 42 kW
for the SX one. Furthermore, the beam study showed
the possibility to accelerate the beam power to 1MW.
The first new magnet power supply has been installed
and tested with real magnets. The results show sufficiently high performance of the power supply.

Materials and Life Science
Experimental Facility
Overview
In January 2016, the neutron target (#7) that had afailure in November 2015 was replaced with a backup
target (#2). However, the replaced one did not equip
the helium bubbling system so that we restarted theMLF user operation with a beam power of 200 kW fromFebruary 20. The operation was conducted in a steadyorder: 3-week operation plus 6-day maintenanceperiod for purification of the helium refrigerator of thecryogenic hydrogen circulation system. In the summer
shutdown period, we made great efforts to recover the
helium refrigerator system. After the summer shutdown, the proton beam delivery to the neutron target
began for the MLF user programs on November 2 at
150 kW and ended on December 21, achieving a steady
operation with the high availability of 95%.
The review of the experimental proposals is an important event for the MLF. In the 2016A and 2016B periods,

97 and 90 proposals were approved, respectively, whichwere smaller than the usual numbers because all of thesuspended proposals approved for 2014B and 2015A
periods were carried over to 2016A and 2016B.
There were many activities in the MLF in 2016,
some of which were the first workshop for J-PARC/ANSTO MOU collaboration on March 2 and 3, Quantum
Beam Science Festa 2015 on March 15 and 16, and theEuropean Spallation Source (ESS) - J-PARC collaboration meeting on June 1 and 2. The Neutron and Muon
School, one of the biggest activities in the MLF, washeld between November 22 and 26. 29 young researchers and graduate students participated in the school.
As for the Muon Science Facility (MUSE), after the
successful optimization of the surface muon beamtransport to the S1 experimental area on the S-line, thecommissioning was focused on a new μSR spectrometer,

Materials and Life Science Experimental Facility

J-PARC Annual Report 201616
named "ARTEMIS", and ARTEMIS started experimentson specimens from Tokyo Institute of Technology. It wasa maiden voyage in the quest for innovative materials.
At the D2 area, the beam line was operated to extract
negatively charged muons with lower energy and narrower momentum spread.

In 2016, the operation of the MLF was rather stable, which was very important for the user program.
However, the power was not so high. We will makeefforts to achieve a 1-MW operation while keeping theoperation stable.

Neutron Source
In JFY2016, the neutron production mercury target(target #2) was operated successfully with power of 200
kW since the previous fiscal year, while the fabricationof a new target vessel with redesigned structure (target#8) was carried out at a vendor’s factory. The new target
vessel was aimed to reduce the stress in the portion,
where high thermal stress could be generated by beamirradiation. Therefore, its fore part of 350 mm length
was changed from the previous structure that inner
mercury vessel and surrounding water shroud were
fixed together with bolts and a diffusion bonding to themonolithic structure with structurally coupled inner
mercury vessel and water shroud. For the rear part of
650 mm, the structure of the water shroud composedof internal and external vessel was changed to be thestructurally coupled type (monolithic) as well.
Those parts had to be cut out from a big stainlesssteel block with a wire electric discharge machining(wire-EDM) for the first time in the history of the target
vessel fabrication. In particular, the machining processneeded to change the wire angle continuously was very
difficult and took a long time. This led to a delay of theestimated completion date to the next fiscal year andforced us to extend the use of target #2 for another year.
Since target #2 doesn’t have the gas micro-bubbles
injection system that is needed to suppress the pitting

Fig. 1.

damage at the target front, induced by the proton beam
injection, the operational beam power was lowered
down to 150 kW from the fall run, as shown in Fig.1.
For the fabrication of target #8, we also improved
the testing of welds better than ever. For example, as
the target vessel has triple-layered structure with minimum thickness of 3 mm in each layer, we inspected theweld lines with radiographic testing, supplemented
by ultrasonic testing. As of the end of March 2017,
the fabrication advanced to the stage of welding thebeam window parts to the fore part with the monolithic
structures.
During the summer shutdown period, we took
measures against the performance degradation of thehelium refrigerator of the cryogenic hydrogen circulation system. The heat exchangers were removed fromthe cold box and transported to a vendor’s factoryfor cleaning with Freon. The adsorber installed in thedownstream of heat exchangers was replaced with abrand-new one. As a result, 90 g of oil accumulated inthose components were extracted. After the maintenance, the differential pressure at the heat exchanger
and the adsorber never increased, restoring the reliable
performance for a long-term operation. The resultant
operation efficiency for the MLF user program remained
significantly high at 93.8% through JFY2016.

Target operation history in JFY2016
The blue histogram indicates the incident proton beam intensity and the green lines represent the average operation
efficiency in each accelerator run cycle.

J-PARC Annual Report 2016

Materials and Life Science Experimental Facility

17

Neutron Science
1. User Program
The user program of 2016 was affected by the target incidents that happened in 2015. Since we decided
to carry-over all unexecuted experiments in the 2015A
term, the total available beamtime was reduced to 42days for each of the 2016A and 2016B terms. Also, toguarantee the stable operation of the target, the operating beam power was limited to 200 kW and was evenfurther reduced to 150 kW in November.
For the 2016A period, 85 general neutron proposals were approved from 275 by the MLF Advisory Board
after the Neutron Science Proposal Review Committee.
The total competition rate was as high as 3.2. For 2016B,
90 proposals were approved from 234, so the total competition rate was 2.6.
2. Instruments development and construction
The construction work of the polarized neutron
spectrometer POLANO at BL23 was in progress. To
examine the radiation safety, POLANO accepted thefirst neutron beam. On-beam commissioning will bestarted in JFY2017.
Other instrumental work has also been done.
For example, in the backscattering instrument DNA
at BL02, the installation of Si-311 analyzer banks wasstarted to extend the energy-momentum space. At
the High Resolution Chopper Spectrometer (HRC) at
BL12, to improve the gain in the scattering intensities for Neutron Brillouin scattering (NBS) option, thelow-angle detectors were modified to be aligned in a
double layered configuration. Also, the Fermi chopper
and the collimator were improved.
3. International Activities
On June 1 and 2, 16 scientists and technicians fromthe European Spallation Source (ESS) visited the J-PARC
facilities and we had the first ESS - J-PARC Collaboration
Workshop to exchange information on broad range offields, from radiation safety issues to practical mattersin construction of neutron instruments (Fig. 2). The second worship will be held at ESS in 2018.
The First Neutron and Muon School, which was
the newly reorganized MLF School, was held from
November 22 to 26. 8 neutron instruments contributed
to hands-on experiments and 25 of 30 participants took
part in neutron experiments.

Fig. 2. Prof. Yokoo explains the inside structure of HRC to the
ESS participants.

We held the J-PARC Workshop entitled "Neutron
Biology for the Next Generation" on March 22. The purpose of the workshop was to promote the investigations
related to biology at the MLF. The future prospects of
the MLF research in the field of biology were discussed
from both scientific and instrumental points of view.
4. Resultant outcomes
The research activities in neutron science at the
MLF resulted in more than 80 papers.
The DNA beam line (BL02) group won theTechnology Prize of the Japanese Society for Neutron
Science for the development of DNA.
The ANNRI beam line (BL04) group was awarded
the Culture, Sports, Science and Technology Minister'sCommendation of 2016 for the work titled “Significant
innovation and application of neutron resonancespectroscopy”.
Sumitomo Rubber Industries Ltd. was awarded
as 28th Award of The Society of Rubber Science andTechnology, Japan, for the development of high-performance tire technology (ADVANCED 4D NANO DESIGN).
Based on this technology, a new tire product was commercialized in November 2016.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201618

Neutron Devices
As one of activities at the Neutron Instrumentation
Section of the MLF, the development of scintillation
3
neutron detectors as an alternative to the He gas3
based detector has been in progress since the He gas
crisis occurred around 2009. Two types of scintillation
defectors, such as large area, two-dimensional (2D)
scintillation detectors and one-dimensional (1D) tubular detectors, are aimed to be developed.
Flat neutron-sensitive scintillator screens and wavelength-shifting (WLS) fibers have been used to develop
a large area neutron detector. This technology has
several advantages over the conventional clear fiber
one. They include its simple structure and flexibility inthe pixel size. The detector head comprises WLS fiber
arrays in x and y directions and scintillator screens. The
WLS fibers are placed at a regular pitch with an air gap
between each other. Figure 3 shows prototype detectors that have neutron-sensitive areas of 32 × 32 and64 × 64 cm (denoted as Det 32 and Det 64 in the figure[1]). The pixel size is designed to be 2 × 2 cm for both
detectors. It can be reduced to 5 mm. The Det 64 detector is one of the largest 2D detector modules of thistype ever built at the MLF. Experiments under neutron
252
irradiation with a Cf source showed that the countuniformity over the detector area was 10% as a relative
standard deviation. The detector also exhibits detection efficiency of 40-50% for thermal neutrons with a
60
Co gamma-ray sensitivity of ~10-6.
As 1D tubular scintillation detectors, we have proposed a scintillator / WLS fiber coil (SFC) detector. The
idea of the SFC structure is to make the detector element with a rolled WLS fiber coil sandwiched between

Fig. 4. A 14-element prototype detector. (a) Photographand (b) a schematic view of the detector

two cylindrical scintillator screens [2]. This uniquestructure yields a neutron absorption probabilty cor3
responding to that of a 6-bar 1-inch diameter He PSD.
Hence, the detector’s potential is enhanced to exhibit ahigh detection efficiecy.
A linear position-sensitive neturon detector canbe built by alignining many elements in a tubularcase. Figure 4 shows a photograph and a schematic
view (inside) of the small prototype detector. 14 SFC
elements have been implemented in the cylindricalaluminum tube. The adoption of an individual element readout system makes the detector pixelated inprinciple, hence assuring a high global count rate capa3
bility, which would exceed that of a conventional He
PSD. The tubular detector makes it easy to be installed-3
mechanically in a high vacuum vessel (<10 Pa). It isalso possbile to tile many detectors side by side with anegligible gap in a way similar to the array of the tubu3
lar He PSDs. Neutron irraddiation experiments using
a Cd mask demonstrated that the proposed detectror had a position resolution of 2 cm, and this type ofdetector would be one of the most promising candiates
3
to be used in vacuum as alternatives to He gas-based
detector.
References[1] T. Nakamura, et. al., in the proceedings of 2015 IEEE
NSS conference record (2015).
[2] T. Nakamura, et. al.,US patent No.9268045, 2016.

Fig. 3. Prototype detectors with neutron-sensitive areas of2
32 × 32 and 64× 64 cm (Det 32 and Det 64) [1].

J-PARC Annual Report 2016

Materials and Life Science Experimental Facility

19

Muon Source and Science
Ultra Slow Muons
When the “Ultra Slow Muon Microscope” project
was launched in 2011, as a whole-community enterprise, no one imagined the twists and turns of the scale
they experienced until recently in reaching the first goalof ultra slow muon (USM) beam production. Apart fromthe difficulties already conceived in the planning, theproject was forced to a slow start under the prolonged
consequences of the gigantic East-Japan earthquake,and experienced a sequence of unscheduled long-term
disruptions due to incidents in the Hadron hall and the
MLF. The e-mail on February 21, 2016, from the experimenters at the U1A cabin, reporting a time-of-flightpeak that signaled the generation of USM, brought
great satisfaction to those who were concerned andawaited the news impatiently. However, they have also
been reminded that much more remains to be done
before the delivery of the first real beam to the U1Aexperimental area. Since then, the struggle to optimize
the USM beam has continued over the rest of the year.
New Spectrometer “ARTEMIS” on Stage
Following the successful optimization of the surface
muon beam transport to the S1 experimental area on
the S-line toward the end of March 2016, the focus of
the commissioning work shifted to a new µSR spectrometer, named “ARTEMIS” (an acronym for Advanced
Research Targeted Experimental Muon Instrument
at S-line, Fig. 5). The spectrometer was built with thesupport of the Element Strategy Initiative Project forElectronic Materials (headed by H. Hosono, Tokyo
Institute of Technology), which is primarily involvedin providing evaluation through on-demand µSR formaterials development projects. The commissioning
work was conducted under the S1-type Inter-University
Muon Research Program (Principal Investigator, K.M.
Kojima), and it passed a milestone of performance,
exceeding that of the twin spectrometer running at the
D1 area. Now, ARTEMIS started accepting specimensfrom Tokyo Institute of Technology for the real µSR runs,
contributing to the development of innovative materials. We plan to make the instrument available to thegeneral-use program in 2017, which will provide relief
to the µSR users at the overcrowded D1 instrument.

Negative Muons Gear Up
At the D2 area, the beam line was tuned to extract
negatively charged muons with lower energy andnarrower momentum spread, so that the beam may
be applied to non-destructive element analysis forflatter materials. Meanwhile, after some commissioning
work on sample environment for the conventional µSR
experiment with surface muons, the S-line has been
tuned for extraction of negatively charged muons (theso-called “cloud muons”) to examine the possibilityof “negative muon spin rotation.” Although the beam
intensity is not impressive at this stage, the information
would be useful to assess the feasibility of the technique in the forthcoming 1 MW era.
Making the Rad-hard Base of S/H-lines
The radiation shield around the muon beam exit for
the H-line in Experimental Hall No.1 was reinforced forthe 1 MW proton beam operation coming in the near
future. The additional shield was designed by taking
account the first phase of the H-line (with one experimental area, H1) as well as the full-fledged S-line (withfour branches), so that it would comprise a part of theshields for both beamlines.

Fig. 5. The S1 instrument “ARTEMIS” viewed from the back of
the S1 area.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201620

Technology Development
The technology development section is responsible for the common equipment and development ofdevices of neutron scattering instruments.
The summary of the common equipment situation
is as follows.
An enhanced air conditioner system, which consistsof many small air conditioners in the experimental halls
was installed, because the original design of the air
conditioner system was insufficient due to a limited
construction budget, besides there was strong demand
from the users. As a result, a drastic improvement wasachieved in the experimental halls.
In order to reduce the load of maintenance due tofrequent replacement of burned lights, we replaced
the ceiling mercury lamp of the west extended experimental hall with LED lighting. The replacement of theceiling mercury lamps with LED lighting in large experimental halls 1 and 2 will be performed next year.
The J-PARC research building was completed lastyear. There are many experimental rooms such as
deuteration laboratory, sample environment development room, sample preparation room, measurementroom, machine shop, etc. Power supplies were installed
in individual experimental rooms in the J-PARC researchbuilding, then developments of sample environment
equipment and sample preparations were started there
as well.
Installing alarm indication systems on individual
beamlines in the experimental halls was started. Thissystem consists of a signal line of monitoring equipment, connection box, controller, signal light and PC
via J-LAN. The schematic of the system is shown in Fig.
6. This system allows the display of the status of individual beamlines’ equipment, collectively monitored, at
a monitoring room.

LAN

BL01

BL02

BL・・

One of the purposes of the system is to ensure
an unattended operation of various kinds of sample
environment equipment, for example, cryofurnace, byobservation in the monitoring room.
The summary of the development of devices is asfollows.
Radial collimators for the BL18, BL21 and 7 T magnet
were assembled by the in-house staffs. Spare disks forthe high-speed disk chopper were fabricated. The development of a high-durable chopper has continued. A
prototype high-durable T0 chopper was completed andlong-term running tests will be performed the next year.
The development of a 30-T pulsed magnet system
has continued. The magnet device itself was completed
last year. A cryostat insert was fabricated this year andto test the system performance, the first neutron scattering experiment was performed at BL12.
Three new common cryostats were introduced,
which brought the total of the operational cryostats
to four. These cryostat were used in nine user experiments. The MLF standard device–control software,
IROHA2, which enables flexible remote control, wasinstalled into a superconducting magnet system, andan unattended operation was started under magnetic
field loading. There are two common high-temperature
furnaces, which were used in five user experiments.
Progress was achieved in the development ofpolarized devices. The first user experiment in the field3
of fundamental physics by using He spin filter was
performed at BL04. The first polarized-neutron diffraction verification experiment for material science research
was performed by using two on-beam SEOP spin filters at
BL18. And the first verification experiment on magnetic
imaging for industrial application by using two on-beam
3
SEOP He spin filters was conducted at BL22.
Host PC
Monitoring room
J-LAN

Signal light
Controller
Connection box

Equipment

Fig. 6. Schematic of the alarm indication system.

Particle and Nuclear Physics

Neutrino Experimental Facility
The T2K run in Japanese fiscal year (JFY) 2016 consisted of
two periods. On April 14, 2016, the first run period started in an

20

addition to 7.47x10 POT in the anti-neutrino mode, since thebeginning of the experiment.

anti-neutrino mode, and continued until May 27. The second

Using data collected up to May 27, T2K released the world’s

run period started on October 26 in a neutrino-mode and will

first constraint on the CP phase of neutrino oscillation. The details

continue until April 12, 2017, beyond the end of this fiscal year.

are reported in the highlight section of this annual report. T2K

The history of the accumulated protons on target (POT) andalso updated the θ23 measurement, as shown in Fig. 2, suggest-

the beam power are plotted in Fig. 1. Stable operation of 460-

ing maximal mixing, which NOvA disfavors. Results with data

kW beam power was successfully achieved, and as of March 31,

obtained up to the second-period run of JFY2016 are expected20

2017, T2K accumulated 13.97x10 POT in the neutrino mode, into clarify this situation.

Particle and Nuclear Physics

J-PARC Annual Report 201622

Fig. 1. History of accumulated POT and beam power since thebeginning of T2K.

2

2

Fig. 2. A plot of sin θ23 vs. Δm 32. The T2K result(black lines) favors maximal mixing.

Hadron Experimental Facility
The Hadron Experimental Facility (HEF) of J-PARC
is used for fixed-target particle and nuclear physics experiments with hadron beams produced by theslowly-extracted (SX) 30 GeV proton beam from theMain Ring accelerator. In JFY2016, a stable user operation of HEF was conducted in June with beam power of
42 kW and repetition cycle of 5.52 second. Three beamlines, K1.8, K1.8BR, and KL for high-intensity K-mesons(kaons), were operated during that period. The total
delivered beam power during the JFY2016 operation

was 875 kW*days, which is 30% of the total beam power
delivered so far to the facility.
From July 2016 to March 2017, the breaking of thesouth-west wall of the experimental hall and the consolidation work of the vacuum system for the primarybeam line in the hall were successfully completed.
The preparation of the new primary beam line,
which delivers beams to the high-momentum beamline and the COMET beamline, is also underwary.

Strangeness / Hadron Physics Experiments
With these beams, hadron/strangeness physics
experiments were conducted, such as the study of adouble strangeness system with an emulsion-counter hybrid method (E07), the spectroscopic study ofhyperon resonances below the KbarN threshold (E31),
and the spectroscopy of kaonic deuterium and kaonic
helium (E57 and E62).
While these experiments took pilot data during the

JFY2016 operation, remarkable results from the E15
experiment, which took data in JFY2015, were reported.
The collaboration proved the existence of a boundstate of the K-pp system with relatively smaller binding
energy. This result was discussed at a dedicated symposium at the Japan Physical Society's annual meeting inMarch 2017, and attracted significant attention.

Kaon Decay Experiments
The KOTO experiment is designed to study therare decay of a long-lived neutral kaon into a neutral
π meson and a pair of neutrinos. Detecting this decay0
is a challenge because only two photons from π are
observable, and the decay has not been observed yet.

The branching fraction has been theoretically predicted-11
in the Standard Model as (3.0±0.3)×10 .
The activities in FY2016 are described in details in
the highlight section.

J-PARC Annual Report 2016

Particle and Nuclear Physics

23

Muon Experiments
The COMET collaboration aims at searching for the
muon-to-electron conversion at sensitivity better than
-14
10 in its first phase of the experiment. Intensive R&D
was carried out in 2016 to prepare the experiment: theconstruction of the cylindrical drift chamber, the main
detector of physics measurement, was successfullycompleted, followed by a performance test using cosmic rays. A real-size prototype of the Straw-tube tracker[1] and LYSO electron calorimeter was tested in vacuum
using an electron beam with power above 100 MeV.
The new experiment for measurement of muon
anomalous magnetic moment (g-2) and electric-dipole
moment (EDM) is under preparation in the Materials andLife Science Experimental Facility (MLF) of J-PARC.
A technical design report (TDR) was prepared by
the collaboration which covered the successful completion of an interdigital H-mode drift-tube linac design
with alternative phase focusing for muon linac [2] anda three-dimensional spiral injection scheme [3]. The
TDR was inspected by a specialized review committee,
which consisted of experts in muon beam, accelerator,and detector technology.
[1] Nucl. Instrum. Meth. A845, 269 (2017).
[2] Phys. Rev. Accel. Beams 19, 040101 (2016).
[3] Nucl. Instrum. Meth. A832, 51 (2016).

Highlights-1: The World’s First Indication of
Non-conservation of CP Symmetry in the Neutrino Sector
Baryonic matter and its antimatter are believed to havebeen evenly produced in the early universe. However, the current
universe is dominated by matter only, and antimatter is rarely

the neutrino sector. The search for CP violation will have the highest priority in neutrino physics research in the coming decade.
In the T2K (Tokai-to-Kamioka) long-baseline neutrino-oscil-observed. This large deficit of antimatter is one of the most impor-lation experiment, the νμ → νe oscillation phenomenon in a muontant questions in elementary particle physics. Charge-parity (CP)neutrino beam was observed [2], which opened the possibility ofsymmetry breaking (or CP violation) is one of the necessary con-searching for CP violation in the neutrino sector. The setup of theditions for this baryon–antibaryon asymmetry in the universe. CP

T2K experiment is described in detail in [3]. T2K used a high inten-

violation was discovered by kaon decay in 1964. The Cabibbo–

sity proton beam from J-PARC to produce a muon neutrino beam,

Kobayashi–Maskawa matrix, by which CP violation in the quark

and the SK detector, 295 km away from J-PARC, as its far detec-

sector can be expressed, is the only known source of CP viola-

tor. Proton beams of 30 GeV were exposed to a graphite target totion reported so far. However, it is not sufficient to quantitatively

produce charged pions and kaons, which were focused by three

explain the observed matter–antimatter asymmetry. On the othermagnetic horns. The charged mesons decayed in flight to muon

hand, CP violation has not yet been discovered in the lepton sec-

neutrinos and muons in a 94 m long decay volume, followed bytor. Therefore, it is important to search for CP violation in thea graphite beam dump and muon monitors. By selecting theneutrino sector to find other sources of CP violation.

polarity of the horn current, a neutrino or antineutrino beam

There are three types of neutrinos: electron neutrinos (νe),

was selectively produced. An interesting feature of the T2K neu-muon neutrinos (νμ), and tau neutrinos (ντ), which are named after

trino beam was the world’s first utilization of the off-axis neutrino

their charged partners. Since neutrinos have finite mass, one typebeam, which was at 2.5° relative to the proton beam direction,of neutrino can transform to another type, a phenomenon known

resulting in a narrow energy spectrum peaking at 0.6 GeV, whereas neu-trino oscillation. Neutrino oscillation is theo-reticallythe oscillation probability for a distance of 295 km was maximum.

expressed by the Pontecorvo–Maki–Nakagawa–Sakata matrix,

The T2K experiment started in January 2010 and collectedparametrized by three mixing angles: θ12, θ13, θ23, and a CP violat-

data until May 2013 with the neutrino mode beam. After the dis-ing phase, δCP. After the discovery of neutrino oscillation by SK

covery of νμ → νe oscillation, data collection with the antineutrino(Super-Kamiokande) experiment in 1998 [1], many experiments

mode beam was performed from May 2014 to 2016. The collectedhave been conducted to determine these neutrino oscillation

data corresponded to an exposure of 1.51 × 10 protons-on-tar-

parameters. All three mixing angles have been determined pre-get (POT) in total, in which 7.48 × 10 and 7.47 × 10 POT werecisely. However, no definitive measurement of δCP has been made.

collected with the neutrino and antineutrino mode beam, respec-

At this time, we do not know whether CP symmetry is violated intively. The maximum beam power during this period was 425 kW

21

20

20

Particle and Nuclear Physics

J-PARC Annual Report 2016

6

Events/0.5 GeV

Events/0.5 GeV

24

5
4
3
2
1
0
0
0.2 0.4 0.6 0.8
1 1.2
Reconstructed neutrino energy (GeV)

4
Unoscillated prediction
3.5
Best-fit spectrum
3
Data
2.5
2
1.5
1
0.5
0
0
0.2 0.4 0.6 0.8
1 1.2
Reconstructed neutrino energy (GeV)

Fig. 3. Reconstructed neutrino energy of the νe (left) and anti-νe (right) candidate events [4].

and the beam intensity was 2.2 × 1014 protons/pulse, which was
the world’s highest intensity recorded for a fast extracted beamfrom a proton synchrotron. In the far detector data, 135 νμ , 66
anti-νμ , 32 νe , and 4 anti-νe candidate events remained after all
selection criteria were applied (see Fig. 3) [4]. The expected number of νe and anti-νe events depends on δCP and mass ordering
2(i.e., ∆m 23 > 0 or < 0). 28.7 νe and 6 anti-νe events were expectedfor δCP = −π/2, and 24.2 νe and 6.9 anti-νe events were expected2

for δCP = 0, respectively, for normal ordering, i.e., ∆m 23 > 0. Four2

neutrino oscillation parameters, θ23, ∆m 23, θ13, and δCP, were estimated by a maximum likelihood method using the kinematic
information of the candidate events in the four samples (νμ,anti-νμ, νe, and anti-νe). Figure 4 shows the resultant confidence
22Fig. 4. 68% (90%) confidence regions in the δCP–sin θ13 plane.
68% confidence region from reactor experiments on2
sin θ13 is shown by the yellow vertical band [4].

2regions in the δCP–sin θ13 plane. The best fit values of sin θ13 are ingood agreement with that from reactor measurements. Further
constraint on δCP can be obtained by the reactor constraint (seeFig. 5). The best-fit value of δCP = −1.79 and −1.41 for normal andinverted ordering, respectively, was obtained. CP conservation(δCP = 0, ±π) was excluded at the 90% confidence level, which is
the world’s first indication of non-conservative CP symmetry in
the neutrino sector.
In October 2016, T2K restarted data collec-tion with the neutrino mode beam. During this period, a maximum beam power of
470 kW was achieved for continuous beam operation. The datacollection was finished on April 12, 2017 and data corresponding20
to 7.26 × 10 POT were accumulated in this period. The neutrino

mode data were almost doubled compared to the last run. The
accumulated POT from the beginning of the T2K experimentFig. 5. The curves show a degree of inconsistency with the observed data as a function of δCP for normal (black) andinverted (yellow) mass ordering. The vertical lines show
allowed 90% confidence intervals [4].

21is 2.25 × 10 POT. In summer 2016, the T2K team submitted a21
proposal for an extended run to 20 × 10 POT with the J-PARC

References

accelerator upgrade, aiming to perform an initial observation of[1] Y. Fukuda et al., (Super-Kamiokande Collaboration), Phys. Rev.

CP violation at more than a 99.7% confidence level for the case ofLett. 81, 1562 (1998).

maximum CP violation [5]. The T2K experiment will continue its[2] K. Abe et al., T2K Collaboration, Phys. Rev. Lett. 112, 061802 (2014).

data collection for the discovery of CP violation.

[3] K. Abe et al., T2K Collaboration, Nucl. Instr. Meth. A659, 106 (2011).
[4] K. Abe et al., T2K Collaboration, Phys. Rev. Lett. 118, 151801 (2017).
[5] K. Abe et al., T2K Collaboration, arXiv:1609.04111v1 (2016).

J-PARC Annual Report 2016

Particle and Nuclear Physics

25

Highlights-2: First strains of KOTO from J-PARC: Exploringnew physics through rare kaon decays
An international collaboration consisting of 65
physicists from Japan, Korea, Russia, Taiwan, and the
USA has published the first physics results [1] from theirexperiment KOTO, short for “K0 at Tokai,” and continues
to make strides toward exploring new physics beyond
the Standard Model (SM) through rare K-meson (kaon)
decays. The experiment is being conducted at the
Hadron Experimental Facility of J-PARC using the slowly
extracted high intensity protons with an energy of 30
GeV from the Main Ring accelerator.
The quantum transition of a heavy particle into
lighter particles is called “decay” in particle physics. The
decay of a particle proceeds via several paths or “decay
modes”. The KOTO experiment studies the decay of the0long-lived neutral kaon (KL) into a neutral pi meson (π )and a pair of neutrinos, represented as KL → π0νν. This
decay occurs due to higher-order effects in the neutral
current from strange quark to down quark, and breaks
the symmetry in the combination of the operationsof charge conjugation (C) and spatial inversion (P),CP symmetry, directly. The SM predicts the branching
fraction Br (KL → π0νν), once in forty billion KL decays,
very precisely. By examining this ultra-rare decay, newsources of CP symmetry breaking that can explain thematter-antimatter asymmetry in the universe may berevealed most clearly, particularly in the case where the0measured Br (KL → π νν) is much higher than the predicted one. In reality, this decay mode occurs with only0
two photons from the subsequent π decay detectablein the final state and has so far never been detected

Fig. 6. Schematic drawing of the detector for the KOTO
experiment.

experimentally.
The KOTO experiment, proposed in 2006 andapproved in 2009, is the only experimental study of the0
KL → π νν decay in the world. The neutral beam line andthe detector (Fig. 6) were constructed from FY2009 to
FY2012 and the data collection started in May 2013. The
crucial feature of the detector employed is the calorimeter at the endcap and the use of 50- cm- long undoped
0
CsI crystals to measure two photons from π . The 2716
crystals and phototubes were the ones used in the KTeV
experiment at Fermilab, USA, in the 1990s. For hermetic
detection of extra particles from KL-decay backgrounds,
0 0
0 + −
e.g. KL → π π and KL → π π π , and vetoes on them,charged particle and electromagnetic shower counterswere installed on the inside of the vacuum vessel of thedetector covering the KL decay volume. Counters werealso placed downstream of the vessel to detect particles escaping along the beam line.
The first physics results from KOTO are from thedata collected over one hundred hours in 2013, cor18
responding to 1.6 × 10 protons-on-target (POT). The
0single event sensitivity for KL → π νν is comparable tothe final sensitivity of the previously performed E391a
experiment [2] at the KEK Tsukuba campus in 2005,18
derived with 2.5 × 10 POT with an energy of 12 GeV
over four months. Figure 7 shows the scatter plot of the0
reconstructed π transverse momentum (PT ) versus the
decay vertex position (Zvtx) of the events with all theselection criteria, including extra- particle vetoes. The
region surrounded with a thick solid line is the signal

Fig. 7. Scatter plot summarizing the KOTO analysis for the firstphysics results [1].

Particle and Nuclear Physics

J-PARC Annual Report 201626
region, in which the KL → π0νν decay should appear as
an event with a finite PT, corresponding to the momentum taken away by two neutrinos, and with Zvtx in the
decay volume. The black dots represent the data, andthe pink contour indicates the distribution of the KL →0π νν decay from Monte Carlo simulations. The black
italic (red regular) numbers indicate the numbers ofobserved events (expected background events) for theregions divided by solid and dashed lines. One candidate event was observed while 0.34 ± 0.16 background
events were expected, mainly due to halo neutrons in
the beam directly hitting the calorimeter, and an upper−80limit of 5.1 × 10 for Br (KL → π νν) was set. The KOTO
experiment also performed the direct search of the
0 0
0
two-body decay KL → π X , where X is a hypothetical0invisible particle [3] with a mass around the nominal π−80 0mass, and an upper limit of 3.7 × 10 for Br (KL → π X )was set for the first time.
KOTO resumed the data taking in April 2015
and, in FY2015 and FY2016, collected twenty times
more data than that of the first run. The analysis iscurrently undertaken intensively. In the meanwhile,large 3-m-long shower counters (Fig. 8) with a diameterof 1.9 m and a weight of 6 tons in total, named “Inner
Barrel (IB)”, were built at the Tsukuba campus, transported to Tokai, and successfully installed to the KOTO
detector in March 2016. The commissioning of the IB
counters in FY2016 demonstrated that the counterswould improve the veto capability of the KOTO detec0 0
tor and reduce the level of the KL → π π background to0
be below Br (KL → π νν) in the SM, as designed.
Since 2013, the KOTO collaborators have upgraded
several detector subsystems and developed new analysis methods, particularly to discriminate photons fromneutrons in the calorimeter, and to reduce the backgrounds. The collaborators are also preparing to modify
the calorimeter to add a neutron discrimination capability. With these improvements, they expect to continue
the KOTO experiment to explore the wide region in Br
0(KL → π νν) to the level of SM prediction, and observe0
the KL → π νν decay for the first time.

Fig. 8. Photographs of the IB shower counters.

References[1] J-PARC KOTO Collaboration; J. K. Ahn et al., Prog. Theor.
Exp. Phys. 2017, 021C01 (2017).
[2] J. K. Ahn et al. (E391a Collaboration), Phys. Rev. D 81,
072004 (2010).
[3] K. Fuyuto, W.-S. Hou, and M. Kohda, Phys. Rev. Lett. 114,
171802 (2015).

J-PARC Annual Report 2016

Particle and Nuclear Physics

27

Highlights-3: Full Scale Investigation of Multi-Strangers’
World Has Begun
Understanding both qualitatively and quantitatively the forces acting between nucleons from thebasic theory of strong interaction, quantum chromodynamics, is one of the most important problems to besolved in the fundamental physics. An exquisite balanceof the repulsive core in the central region and attractive
force in the intermediate region, as well as the existenceof spin-orbit force in the nucleon-nucleon interaction
govern the stability of nuclei and their abundance, andconsequently, all baryonic matter of the universe. In
the strangeness nuclear physics, we will approach thisproblem by adding strange quark(s) and extending thenucleon-nucleon interaction in the two-flavor world of
up- and down quarks only to interactions among theoctet baryons in the three-flavor world with an additional strange quark. The additional six baryons with
+
0
–
0
–
strange quark(s), Λ, Σ , Σ Σ , Ξ , and Ξ in the octet
are collectively called hyperons. Due to the difficulty of
conducting hyperon scattering experiments, the information about hyperon-nucleon or hyperon-hyperon
interaction is obtained from the studies of hyper nuclei
made of hyperons in addition to nucleons.
Until recently, only a few doubly-strange nuclei(DSNs) were recognized and, consequently, not much
was known about hyperon-hyperon and Ξ-nucleon(ΞN) interactions. Only ΛΛ interaction is known to be
6
weakly attractive from double-Λ hyper-nucleus, ΛΛHe,
which was uniquely identified in the emulsion experiment at KEK 12 GeV proton synchrotron E373 (called
NAGARA event) [1]. However, this situation has changed
recently.
A new type of DSNs, in which a Ξ hyperon containing two-strange quarks is bound, a Ξ hyper-nucleus,
was discovered [2]. This event, called a KISO event, wasfound using a new method developed for an experiment at J-PARC E07. In this overall scanning method[3], the microscopic images of the emulsions are processed to pick up the vertex-like shapes. The DSNs arecharacterized by at least three vertices, one for its own
production and two more for weak-decays of the twostrange quarks.
–
The KISO event was uniquely identified when Ξ1410
was absorbed by N nucleus and decayed into ΛBe5and ΛHe, as shown in Fig. 9. The obtained binding–
energy of Ξ is 4.38 ± 0.25 MeV, assuming that both
105
ΛBe and ΛHe are in their ground states. Even if theFig. 9. A superimposed image (upper) and a schematic drawing(lower) of the KISO event. It was uniquely identified as Ξ

–

14
10
5
10
8
+ N → ΛBe(#1) + ΛHe(#2) (A), ΛBe → Li(#3) + p(#4) +
5

8

8

+

n (B), ΛHe → p(#7) + d(#8) + 2n (C), and Li → Be*(2 ) +8+

e + anti-νe Be*(2 ) → 2α(#5, 6) (D).
–possibility of excited final states is taken into account,it has to be larger than 0.17 MeV, which corresponds–
to an atomic 3D orbit of Ξ . It is likely to be larger than10
1.03 ± 0.18 MeV using the mass values of ΛBe excitedstates [4] reported after the publication. Therefore, thisis not an atomic state but a nuclear bound state. Thus,–Ξ nucleus potential and the underlying ΞN interaction
must be attractive. The paper on the KISO event won
the 22nd Outstanding Paper Award of the PhysicalSociety of Japan in March 2017.
The existence of Ξ hyper nuclei is also suggestedby the E05 pilot data obtained in 2015 at the K1.8 beamline of J-PARC Hadron Experimental Facility. This experi12
ment aims to observe Ξ hyper-nuclear states of ΞBewith both high resolution of 2 - 3 MeVFWHM and high+statistics using a new K spectrometer currently under
12
construction. The Ξ hyper-nucleus, ΞBe, is produced–
12by K beam on C target and identified by the missing–+
mass method, where beam K and scattered K are mea+
sured using beam and K spectrometers, respectively.
Fig. 10 shows the missing mass spectrum obtainedusing the existing Superconducting Kaon Spectrometer(SKS) with 6 MeVFWHM resolution in the pilot run. A large–
bump above the Ξ binding threshold (–B.E. = 0) cor–
responds to Ξ quasi-free production. Despite theimproved resolution, the measured spectrum shapein the bound region (–B.E.< 0) looks very similar to theParticle and Nuclear Physics

J-PARC Annual Report 201628
earlier data from the Brookhaven National Laboratory
obtained with 14 MeVFWHM resolution [5]. Some excess
exists in the bound region, even if the flat unphysicalbackground and the tail of the quasi-free production
due to experimental resolution (shown by curves in the
figures) are considered. This result strongly indicates12
the existence of another Ξ hyper-nucleus, ΞBe.
The E07 experiment studying DSNs by emulsion has started taking the data after commissioningof the KURAMA spectrometer, which had been newly–
installed at the K1.8 beam line in May 2016. The Ξ–
hyperons produced by K + p (in a diamond target) →+–K + Ξ reaction were injected into the emulsion stack.
In the conventional counter-emulsion hybrid method,––Ξ stopping points are detected by following Ξ tracks
using the information on their position and direction
measured by the spectrometer system. The DSNs pro–
duced by Ξ absorption are being searched for X-rays–
from the Ξ atoms of heavy elements, such as Ag or Br
are also measured, for the first time, in order to quantify–
the strong interaction between Ξ and nucleus, which–causes energy shifts of Ξ atomic orbit.
Thanks to the high power of the primary proton–
5
beam at J-PARC, K beams with intensity of 2.6 × 10 /spill and purity of 82% were available for the E07 run,4
whereas only 1.3 × 10 /spill and ~25% were available
for E373 at KEK. In the 2016 run, 18 emulsion stacks outof 118 were exposed. We expect 10-times more events–
as E373, namely, 10000 stopped Ξ , ~100 DSNs and ~10
well-identified DSNs in the hybrid method and further
10-times more events detected in the overall scanning
method. Thus, much more information about the multistrangers’ world of double-Λ and Ξ hyper-nuclei andthe underlying ΛΛ, ΞN, and ΞN → ΛΛ interactions will
come out from J-PARC in a few years.

Fig. 10. Preliminary missing mass spectrum of the 12C(K–,K+)
reaction obtained by the E05 pilot run. The horizontal
axis is the opposite of the binding energy (B.E.) of Ξ–.

References[1] H. Takahashi et al. Phys. Rev. Lett. 87, 212502 (2001); J. K. Ahn
et al. Phys. Rev. C88 014003 (2013).
[2] K. Nakazawa et al. Prog. Theor. Exp. Phys. 2015, 033D02 (2015).
[3] J. Yoshida et al. Nucl. Instr. Meth. A847 86 (2017).
[4] T. Gogami et al, Phys. Rev. C93, 034314 (2016).
[5] P. Khaustov et al. Phys. Rev. C61, 054603 (2000).

Cryogenics Section

Overview
The Cryogenics Section supports scientific activities
in applied superconductivity and cryogenic engineering, carried out at J-PARC. It also supplies cryogen of
liquid helium and liquid nitrogen. The support work
includes maintainance and operation of the superconducting magnet systems for the neutrino beamline, forthe muon beamline at the Materials and Life Science
Experimental Facility (MLF) and construction of themagnet systems at the Hadron Experimental Facility(HEF). It also actively conducts R&D works for future
projects at J-PARC.

Cryogenics Section

J-PARC Annual Report 201630

Cryogen Supply and Technical Support
The Cryogenics Section provides liquid helium
cryogen for physics experiments at J-PARC. The usedhelium is recycled by the helium gas recovery facility at
the Cryogenics Section. Figure 1 summarizes the liquid
helium supply in FY2016.
Liquid nitrogen was also supplied to the users fortheir convenience. Its amount in FY2016 is summarized
in Fig. 2. Liquid nitrogen has been regularly provided
to the Radiation Safety Section for operation of a gas
chromatograph. Liquid nitrogen was also supplied tothe users in MLF and HEF.

Fig. 1. Liquid helium supply at J-PARC from April 2016, to
March 2017.

Fig. 2. Liquid nitrogen supply at J-PARC from April 2016, to
March 2017.

Superconducting Magnet System for T2K
The superconducting magnet system for the T2K
experiment operated during the periods shown in
Table 1. The system worked well without disturbing
the beam time. In addition to the regular maintenances
and inspections in the summer, a screw compressor

was overhauled at the factory of the manufacturer, andthey did not find any abnormal abrasions and defects(Fig. 3). Also, an activated carbon unit for oil adsorption
in the 4th oil separator located at the discharge of thecompressor was replaced with a fresh one.

Table 1. Operation history of the T2K superconducting magnet system.

J-PARC Annual Report 2016

Cryogenics Section

31

Fig. 3. Picture of the screw compressor to be overhauled (left), and the screws at the inspection (right).

Superconducting Magnet Systems at MLF
The Cryogenic Section contributes to the operation and maintenance of the superconducting magnet
systems at the Muon Science Facility (MUSE) in MLF.
The superconducting solenoid in the Decay Muon
Line (D-line) was operated from February 1 to June
8, and restarted on October 19. It was stopped on
December 26 for the New Year holidays, and resumed
on January 5. It was scheduled to operate until theend of June 2017. There were two troubles during
the beam operation. One was the shutting down of
the current source of the magnet by over voltage on

May 25. No defects were found in the inspection by
the vendor at that time, therefore, the beam operation
was restarted soon. In order to investigate the cause, alogging system of output signals in the current control
system was added, and continuously monitored. The
other was a failure of a valve for the LHe flow control,
which caused the coil temperature to rise and quench.
The flow channel was changed to bypass the valve,
and the system was restarted soon. The failed valve
will be replaced in the summer of 2017.

Superconducting Magnet Systems at HEF
The COMET experiment is under construction in the
Hadron South Experimental Hall (HDS) of the Hadron
Experimental Facility (HEF). The Cryogenics Section was
involved in the construction of the cryogenic systemand superconducting magnets. The magnets were
designed to be cooled by a two-phase flow of liquid
helium with 4.5 K temperature and cryogenic heliumgas with around 50 K temperature for the shield. The
cold box (LINDE TCF-50), which operated for the J-PARC
E-36 experiment in FY2015, was relocated in HDS. In theoperation for E36, some of the temperature sensors in
the cold box had a problem functioning at cryogenic
temperature, thus, they were replaced in FY2016. Also,
the piping for the high-pressure helium gas between
the helium compressor and the cold box and thecabling for the cryogenic system were completed to beready for the coming test operation (Fig. 4). While thesuperconducting solenoid magnet for the muon source

in HDS is under construction, the muon transport solenoid to deliver muons to the experimental room wasaligned with respect to the primary proton beam line
(Fig. 5). The design work for the helium transfer lines
to the magnets and also elements of the Pion Capture
Solenoid have been improved by the Cryogenics
Section.

Fig. 4. Cold box with helium piping in HDS.

Cryogenics Section

J-PARC Annual Report 201632

Fig. 5. Alignment of the muon transport solenoid.

R&D for the Future Projects at J-PARC
The g-2/EDM project aims for the precise measurement of the anomalous magnetic moment and theelectric dipole moment of muons. This experiment was
proposed at the MUSE H-Line. A superconducting solenoid with high field homogeneity, better than 1 ppm
locally, plays a very important role as a muon storage ring.
The review of the technical design report (TDR) was held
on November 15 and 16, 2016. The review committee
recommended some points, such as, to seek cost optimization, to reduce the number of cryocoolers, and so on.
TDR is being reviewed and modified based on the committee recommendation.
A muonium hyperfine structure measurement, called
MuSEUM experiment, is proposed at the same beam line
as the g-2/EDM project. In the experiment, the energy
state transition in muonium will be observed under astatic magnetic field with local homogeneity of 1 ppm. A
standard NMR probe to determine the absolute magnetic
field is being developed to calibrate other probes. The
probe was modified based on the test results in FY2015,
and it was tested at the Argonne National Laboratory(ANL) in March 2017. A material effect of the new probe
could be reduced to 4.4 Hz by optimizing paramagnetic
and diamagnetic material volumes. The cross-calibration
between our probe and the pulse NMR probe developedby a US group was carried out and the difference was 0.47
Hz, which was one-fifth of the previous result, 2.73 Hz.
The next test is planned for the beginning of 2018.

Fig. 6. Material effect measurement of a new standard probein ANL.

Information System

Overview
The Information System Section plans, designs,
manages and operates the network infrastructure of
J-PARC and supports to ensure its information security
as well. In terms of computing, until now, J-PARC has
owed its major computer resource for analyzing andstoring data from neutrinos, nuclear physics and MLF
experiments to the KEK central computer system. The
section connects the J-PARC network to the KEK centralcomputing system directory and helps users to utilize
the system effectively.

Status of Networking
Since 2002, the J-PARC network infrastructure,
called JLAN, has been operated independently fromKEK LAN and JAEA LAN in terms of logical structure andoperational policy. In 2016, the total number of hosts
on JLAN exceeded 4,800, an increase by 108% fromlast year’s number. The growth curve of edge switches,wireless LAN access points and hosts (servers and PCs)connected to JLAN are shown in Fig. 1.
On April 1, the National Institute of Informatics(NII) has upgraded SINET (Japan Science Information
Network http://www.sinet.ad.jp) from version 4 to 5,
increasing the backbone network’s speed from 40Gbps
to 100Gbps. SINET is not only a gateway from JLAN to
the internet but also an important connection between

Information System

J-PARC Annual Report 2016

34

300
250
200
150
100
50
0

internet from/to JLAN. Since the bandwidth capacity
for the internet through the SINET is 10Gbps, clearly,
there is still enough space for additional activity. Fig.
4 and 5 show the statistics of data transfer between the
Tokai site and the Tsukuba site. The graphs show thatthe usage level has been approaching half of the maximum, especially during the period when the Hadronfacility was running.

6000
5000
4000
3000
2000
1000
0

Edge Switches
WLAN Access Points

No. of Hosts
connected to JLAN

SW and WLAN AP

Tokai and the KEK Tsukuba site in J-PARC. According to
the SINET upgrade, the network bandwidth between
Tsukuba and Tokai was increased from 1Gbps x 8 to
10Gbps. In addition, besides the current bandwidth,the upgrade offers a future option of 20Gbps for both ofinternet and Tokai-Tsukuba connections, if the J-PARC
network can be adapted.
Fig. 2 and 3 show the network utilization of theGbit/sFig. 1. Number of hosts, edge SW and wireless AP on JLAN.

1.0
0.8
0.6
0.4
0.2
0.0

2h avg.

Apr-16May-16

to internet

5 min. peakJul-16Aug-16Oct-16

Dec-16

Jan-17Mar-17

Gbit/sFig. 2. Network traffic from JLAN to the internet.
(two hours average and five minutes peak value)

1.0
0.8
0.6
0.4
0.2
0.0

2h avg.

Apr-16May-16from internet

5 mi n . peakJul-16Aug-16Oct-16

Dec-16

Jan-17Mar-17

Gbit/sFig. 3. Network traffic from the internet to JLAN

1.2
1.0
0.8
0.6
0.4
0.2
0.0

2h avg.

Apr-16May-16

Tsukuba to Tokai

5 min. peakJul-16Aug-16Oct-16

Dec-16

Fig. 4. Network traffic from Tsukuba to Tokai.

Jan-17Mar-17

J-PARC Annual Report 2016

Information System

G bit/s

35

5
4
3
2
1
0
Apr-162h aavg.

May-16

5min. peakJul-16Aug-16

Tokai to Tsukuba

Oct-16

Dec-16

Jan-17Mar-17

Fig. 5. Network traffic from Tokai site to Tsukuba site.

Fig. 6. Peak network traffic for recent years.

Internet Connection Services for Visitors and Public Usersof J-PARC

Number of terminals

Since 2009, J-PARC has offered a Guest network(GWLAN) service, which is a wireless internet connection service for short-term visitors, available in almost
all J-PARC buildings. In the end of 2014, an additional
network service called User LAN has started. Whenusing the GWLAN, the users are required to receive apassword at the J-PARC Users Office beforehand, while
for the User LAN, the users are authenticated by thesame ID and password for the User Support System,
which is also used for dormitory reservation or so on.

300
250
200
150
100
50
0

GWLAN

From this March, a new service, called “eduroam”, hasbeen started. The eduroam (https://www.eduroam.
org/) is the secure roaming access service developed
for the international research and education community and used jointly among a huge number of research
institutes, universities and others around the world.
The eduroam service will be a convenient third optionof internet connection service for J-PARC visitors. Fig. 7
shows this fiscal year’s usage statistics of GWLAN, User
LAN and the newly- started eduroam service.

userlaneduaorm

Fig. 7. Use trends of GWLAN, User LAN and eduroam.

Information System

J-PARC Annual Report 2016

36

Status of Computing
Though J-PARC does not have its own computing
facility for physics analysis, since 2009, the KEK centralcomputer system at the KEK Tsukuba site has been
mainly used for that purpose. At the Neutrino (T2K
experiment) and Hadron experiments, the data takenin the J-PARC experimental hall will be temporarily
saved at the Tokai site and then promptly transferred
to, stored and analyzed at the system in Tsukuba. The
storage of the system will also be utilized as a permanent data archive for the Neutrino, Hadron and MLF
experiments.

This September, the second upgrade (the first one
was in 2012) of the system was completed. At the new
system, larger resources of 3.6 times computing power,
3.8 times disks capacity and 5.4 times tapes capacity, compared with the previous system, have been
assigned to J-PARC (Table 1).
Fig. 8 to 10 show the utilization statistics of the computer resources in 2016. The main users who used the
CPU and the storage constantly were from the Hadronexperiment group (Koto). The MLF group also started
to store data to tapes on the system.

Table 1. Assigned computing resources to J-PARC activities in the KEK central computing system.

before upgrade

after upgradeCPU1,300 core4,700 core（ x 3.6）

RAID Disk

1,200 TB

4,500 TB（ x 3.8）

Tape

5.0 PB

27.0PB（ x 5.4）

2.0

2.0

1.5

1.5

1.0

P B ytes

P B ytesFig. 8. CPU usage statistics (the yellow line shows resource assignment for J-PARC).

HadronNeutrino

0.5

MLF

1.0
0.5
0.0

Mar-17Jan-17

Feb-17

Dec-16Oct-16

Nov-16

Sep-16

Jul-16Aug-16Jun-16

Apr-16May-16

Mar-16

0.0

HadronNeutrino
MLF

2011

2012

2013

2014

2015

2016

Fig. 9. Disk usage statistics (left: trend for this FY year, right: annual trend).
4

4.0

Hadron3

3.0

Neutrino
MLF

2.0

MLF

1.0

2

Feb-17Mar-17Jan-17

Dec-16Oct-16

Nov-16

Sep-16

Jul-16Aug-16Jun-16May-161
Apr-16

0.0

P B ytes

Neutrino

Mar-16

P B ytes

Hadron02011 2012

2013

2014

2015

2016

Fig. 10. Tape library usage statistics (left: trend for this FY year, right: annual trend).

Transmutation Studies

Overview
We have been working on developing theTransmutation Experimental Facility (TEF) in J-PARC for
R&D on nuclear transmutation technology with using
accelerator-driven systems (ADS) for volume reduction
and mitigation of harmfulness of high-level radioactive
waste.
As a result of detailed design work of TEF over the
recent years, we published a technical design report(TDR) for the ADS Target Test Facility (TEF-T) in March2017 (JAEA-Technology 2017-003, 539 pages). The
TDR contains design results for all TEF-T components,
such as the liquid lead-bismuth target system, equipment for post-irradiation examination, proton beamline from Linac to TEF, building, ancillary facilities, andcontrol system; it also describes the safety and someremaining issues. In addition, a safety design report of
the Transmutation Physics Experimental Facility (TEF-P)
is in preparation.
As for the R&D supporting the TEF program, significant progress was achieved in two areas. The firstone was the successful liquid lead-bismuth eutectic(LBE) circulation operation of IMMORTAL (Integrated
Multifunctional MOckup for TEF-T Real-scale TArget
Loop) at 500°C, which corresponds to the operating
temperature of commercial ADS plants. A number offlange joints was minimized in the main loop to reduce
the risk of LBE leakage. The second area was the successful demonstration of the laser charge exchange (LCE)Transmutation Studies

J-PARC Annual Report 201638
method by crossing a YAG-laser beam and a proton
beam provided by a test stand of Linac. This technique
is required to slice a weak proton beam at a maximumof 10 W for TEF-P out of a high-intensity 250-kW proton beam for TEF-T. In addition, several R&D activities
supporting both TEF-T and TEF-P advanced steadily, as
described in this chapter.
On December 12-14, 2016, the third TEF TechnicalAdvisory Committee (T-TAC), one of the technicaladvisory committees under the J-PARC International
Advisory Committee, was held (Fig. 1). The director of
the J-PARC Center defined the goal of this T-TAC as “topoint out left issues for completing the TEF design, andto advice on approaches to solve the issues, including international collaboration, PR campaigns, etc.” Wetranslated most parts of the TDR in English and submitted them to the T-TAC for a review. In response, the T-TAC
gave us the following encouraging evaluation andadvice: “Both systems TEF-T and -P are outstanding andunique in the world”, and also, “To close the conceptual
design phase of TEF-T, T-TAC recommends to complete thedraft TDR by including additional sections about instrumentation, waste characterization and dismantling”.

Fig. 1. T-TAC 2015 members and attendees.

J-PARC Annual Report 2016

Transmutation Studies

39

Design of the Transmutation Experimental Facility (TEF)
Overview of TEF
The TEF consists of two individual facilities: the
ADS Target Test Facility (TEF-T) and the Transmutation
Physics Experimental Facility (TEF-P). TEF-T equips witha liquid lead-bismuth spallation target bombarded by
a 400 MeV - 250 kW proton beam in which candidate
proton beam window materials are irradiated for materials testing. TEF-P equips with a critical/subcriticalassembly including minor actinides fuels to investigate
physical and dynamic properties of the ADS by using
a low power (10W) proton beam. The two facilities arelocated adjacently as shown in Fig. 2.

N
RCS

LiniacTEF-T

TP+15m

TP+8.6m

TE
EF-P

Fig. 2. 3D image view of TEF-T and TEF-P.

TEF-T Design Update
Based on the conceptual design of TEF-T, the facility design was detailed significantly in this fiscal year,
and the design was compiled in the Technical Design
Report (TDR). A 3D CAD software was used for thedesign. Figure 3 shows a bird’s eye view of TEF-T. The
building has 5 floors including 3 underground floors.
Thicknesses of the shielding wall shown in blue in Fig.
3 were determined by shielding calculation by using aparticle transport calculation code PHITS.
Ancillary systems associated with the LBE target
system, such as the cooling water system, machinery
system, gas system, electric power system, control
system, off-gas processing system and proton beamtransport system, were made detailed. Dimensionsof every room to accommodate these systems werereviewed with considering actual dimensions of thesesystems, and the layout of the rooms was adjusted towell fit in the building. Piping routing and traffic lineof equipment in the building were considered in theadjustment.
A conceptual system diagram of the off-gas processsystem was created. The control system was designed

Linac side

Irradiated components
storage room

Large components
handling room

L-TEF BT tunnel
Laser charge
exchange

250kW
kW

In-cell craneTP+15.3m
TP
1
10W
Irradiated components handling room

Target station

anipulator
Power manipulator
TP+0m
TP+0
0m
TP+8.9m

Target trolley

Multi-purpose use room

tto TEF-P

LBE target

Fig. 3. Bird’s eye view of TEF-T.

in detail to match with the existing J-PARC’s control
system. The irradiated component storage room wasallocated on B2F with complying with safety standards
for storage and handling of radioactive materials. The
irradiated component storage room is connected tothe irradiated components handling room (Hot-cell)through a hatch. Irradiated components can be stored
without additional shielding in the room.
To make effective use of the fast and high-energy
neutrons produced from the LBE target, and even the
primary proton beam, we have studied multipurpose
use equipment in TEF-T. One of the ideas is to incorporate an Isotope Separation On-Line (ISOL) facility
for nuclear physics, nuclear chemistry, material science and others, by using radioactive nuclei produced
by ISOL. An ISOL target, as well as the LBE target, wasincorporated in the target station in the current design.
To assess safety aspect of TEF-T, under an assumption that an incident of LBE leak from the LBE circulation
system occurred during a 250-kW beam operation, an
estimation of radiation dose at the site boundary was
conducted using various conservative assumptions.
As a result, the radiation dose at the site boundary
was dominated by mercury, noble gas, and iodine
produced as spallation products in LBE. Even though
the incident scenario was made rather conservatively,
it was shown that the estimated radiation dose waslower than the annual radiation dose due to natural
sources, and the TEF-T was sufficient safety margin forthe leak of radioactivity.
Classification of the Importance of the Safety
Function for TEF-P
TEF-P is designed as a zero-power critical facility
referring to an existing Fast Critical Assembly (FCA) in
JAEA/Tokai. In TEF-P, the neutronic characteristics ofTransmutation Studies

J-PARC Annual Report 201640
the transmutation systems and operation experiencesof ADS are to be studied by introducing a proton beam
to a minor actinide loaded core.
The safety design required for the license application were considered: the seismic design classificationof the facility and the classification of the importanceof the safety functions. In the seismic design, theradioactive exposure to the external public area wasevaluated to be less than 5 mSv, even when the threevital functions, to stop the reactor, to cool the reactor,
and to confine the radioactive material, have failed.
Therefore, the TEF-P facility was classified as Class B.
As for the importance of the safety functions, theclassifications of the prevention system for the occurrence of abnormalities (PS) and the mitigation system
for the impact of abnormalities (MS) were carried out
according to risk evaluations. Because the estimatedresult of the severest accident was less than 5 mSv,
there was no structure, system, or component classified into PS-1 and MS-1 of Class-1 (secure and maintainas high as reasonably achievable level of reliability) in
TEF-P. The classifications of PS-2 and MS-2 of Class-2(secure and maintain a high level of reliability) arelisted in Table 1. Based on the classifications, the system design for the main components, e.g. reactor
shutdown system (safety rod drive system, movable
table drive system), was carried out to determine thesystem configuration and basic specifications.

Activity Related to TEF-P
The TEF-P core accommodates minor actinide (MA)
fuel in kg-order. Since the decay heat of MA is high, thecore is cooled during the operation. In the risk evaluation, it becomes important to estimate the temperaturewhen the air cooling for the core would stop for a long
period of time. The parametric survey to estimate thecore temperature was carried out.
ANSYS code was employed for the heat transfer
analysis, in which the three-dimensional detail calculation model was used. The following parameters werechanged in the analysis: size of the core, amount ofheat generation by MA, outside boundary of the core
(air or lead). As the limitation of the temperature, themelting point of lead, 327°C, was assumed.
As a result of the parametric survey, it was observedthat the size of the core and the amount of heat generation by MA should be reduced and lead blocks
should be inserted outside of the core to enhance heat
conduction to the outside. By this modification, themaximum temperature of the core became 303°C (Fig.
4) which is less than the melting point of lead. It means
the core will not be damaged and MA will not leak fromthe cladding tube in the case of an accident caused bya failure of the cooling function.

Table 1. Classification of importance of the safety functions(MS-2 and PS-2)

Class

Function
Component, Structure, System,

PS-2

Prevention of insertion of excessive reactivity• Control rod drive system• Movable table drive system (forward)Core constitution• Matrix tube assembly• FuelStorage of radioactive materials• Fuel storage
Safety handling of fuel• MA fuel handling equipment

Emergency shutdown of reactor• Safety rod drive system• Movable table drive system (backward)
Sending signal for engineered safety systems
MS-2
and reactor shutdown system• Safety protection system
Post-accident measurement• Radiation monitor in reactor building

Fig. 4. Temperature distribution of the core in theacceptable case.

J-PARC Annual Report 2016

Transmutation Studies

41

Research and Development
500˚C Operation of the IMMORTALIMMORTAL (Fig. 5) is a demonstrative test loop of
the primary cooling system of the TEF-T target system.
Most of its components provide the same performanceas those that will be installed into the latest design of the
TEF-T target. The purposes of this loop are mainly to assess
the thermal-fluid behavior in mock-up scale, to evaluate
the performance of individually developed componentsof the LBE technologies, and the production of a control
sample for post-irradiation examination (PIE).

Development of an Oxygen Sensor for LBE
We have fabricated several types of oxygen sensors
for LBE. So far, we confirmed that the output voltage ofthe sensor was adequate in a wide temperature range.
Since the sensor will be used in the irradiation condition
in TEF-T, It was required to confirm effects of irradiationon the oxygen sensor. Hence the oxygen sensors were
irradiated by gamma-rays at the Takasaki site, QST, as
the first step.
The irradiation dose of the oxygen sensor in TEF-T
was estimated to be 1 kGy/h. So, one oxygen sensor
was irradiated by gamma-rays at 1 kGy/h for 1000 h.
The appearance of the oxygen sensors before and after
the irradiation is shown in Fig. 7. The surface color of
the sensor head made of yttria-stabilized zirconia (YSZ)
turned light yellow and rust was found at a steel housing. Also, the output voltage of the oxygen sensor
was changed by the irradiation. We will continue thisexperiment for a better understanding of the irradiation effects.

Fig. 5. Photo of IMMORTAL.

We have continued several test operations to confirm
the performance of each component installed since 2014.
Although the target vessel was connected by remoteflanges, we were concerned about the possible LBE leakage during a high-temperature operation according to ourexperience. In order to avoid the leakage, we changed theconnection method of the target vessel to a welded connection at the end of 2016. As a result, it was confirmedthat the operation of LBE circulation in TEF-T at the maximum temperature condition (500˚C) could be reproduced(Fig. 6) without significant trouble.

Fig. 6. Temperature history at a high-temperature operation.

Fig. 7. Oxygen sensors before (upper) and after irradiation(lower) by gamma-rays.

Remote Handling Techniques for LBE System
The replacement method of the target vessel is
one of the key technologies to maintain a safe operation of the TEF-T LBE target system. The target system
is installed under high radiation environment, hence
all components should be maintained by remote handling. We have been developing the applicability of thereplacement technology by remote cutting/weldingof the system piping. A series of both works was performed by operating with master-slave manipulators(MSM) using a commercially available pipe cutter andan automatic welding machine. Because the weld head
was heavy, direct handling of the weld head by using
the MSM was difficult and some kinds of support werenecessary. Further, setting and positioning the weld

Transmutation Studies

J-PARC Annual Report 201642
head and adjustment of the cut piping required a quite
complicated operation, hence we developed a prototype of an auxiliary implement (Fig. 8) to demonstrate
the welding procedure.
Using this implement, we performed a demonstration test of the remote welding operation by the MSM.
Fig. 9 shows the release procedure of the weld headafter welding. As a result, an adjustment of the piping,installation of the weld head and welding of the piping were demonstrated. There were some points to be
improved, such as the necessity to install several monitoring devices for a reliable operation.

However, LBE shows re-crystallization with volumetric expansion after solidification. It means that stress will
be generated in the FV and the FV may be raptured by
the expansion stress. Mockup tests have been started
with instrumented strain gauges at realistic and prototypical conditions to measure the stress/strain levels in
the piping walls after solidification. This will help to assess
the risk and optimize the FV operation. Strain behaviorof test-tube samples under various cooling conditions
is shown in Fig. 10. Obviously, as the cooling rate slows
down, the generated stress decreased.
Stress analysis was performed on the test-tube
samples. The generated stresses of the 3-mm thicktest-tube were lower than the allowable stress. Stressanalysis of the piping of the FV will also be performed.

Fig. 10. Strain behavior for the samples under various coolingconditions.
Fig. 8. Sketch of the prototype of the auxiliary implement.

Fig. 9. Photo of the release procedure of the weld head after
welding.

Development of the Freeze-Seal ValveTo establish the TEF-T LBE spallation target, areliable valve system which can be used for LBE, hightemperature liquid metal, is indispensable. One of thedesirable options of the valve system, freeze-seal typevalve (FV) is under development. The FV has a coolingchannel around the piping to freeze the LBE in the piping and block up the piping by frozen LBE. There are no
movable parts in the FV.

Laser Charge Exchange Technique
A low reactor power of less than 500 W is enoughfor the reactor physics experiments at TEF-P. Therefore,
the power of incident proton beam into TEF-P is sufficient at most 10 W under a typical core condition, i.e. theeffective neutron multiplication factor (keff ) of 0.98. It is
required to stably maintain the experimental conditionsof the incident proton beam and to reproduce the conditions with high accuracy. Accordingly, a highly stable
and low-power proton beam extraction device out ofa high-intensity 250-kW proton beam for TEF-T is indispensable. To meet this requirement, we are developinga laser charge exchange (LCE) technique. Although the
LCE technique was developed originally to measure theproton beam profile, we attempted to apply the LCE
technique to extract the low power proton beam for
TEF-P from the 250 kW beam for TEF-T. Figure 11 illustrates the concept of the LCE device.

Fig. 11. Conceptual diagram of the LCE device.

J-PARC Annual Report 2016

Transmutation Studies

43
The LCE device consists of a bright YAG-laser anda laser transport system with beam position controllers. By exposing the YAG-laser beam to the negativehydrogen (H ) beam from the J-PARC Linac, one of thetwo electrons in an H ion is stripped to be a neutral
00hydrogen atom (H ). After separating the H atoms fromthe remaining H ions by a bending magnet, the other0electron of the H atom is finally stripped by a stripping
foil made of carbon to produce a proton beam for TEF-P.
To measure the power and stability of the charge+
exchanged H beam, an LCE experiment was conductedusing the 3-MeV linac. As shown in Fig. 12, the LCE device
was installed at the end of the 3-MeV linac (RFQ) in cooperation with the J-PARC accelerator division. As a result,+a charge-exchanged H beam with a power of 0.0359 W
was obtained. The power corresponded to 7.99±0.22 W
under the J-PARC’s Linac conditions (400 MeV, 250 kW).
Fig. 13 shows power distribution of the charge-exchanged+
H beam. These results satisfied the power requirement(at most 10 W) of the proton beam for TEF-P.

Fig. 12. Schematic view of the LCE system (1- quadrupole magnet, 2- bending magnet, 3- quartz viewing port, 4- vacuum chamber, 5- beam dump, 6- stripping foil, 7- beam
position monitor, 8- slow current transformer).

+Fig. 13. Power distribution of the charge-exchanged H beam.
Here, the value of the horizontal axis represents the converted power under the J-PARC linac beam condition.

Proton-Induced Activation Cross Section Measurement
Proton-induced activation cross section is theprobability of producing radioactivity in materials. Thisis quite important in estimating an amount of radioactive waste and lives of components. The measurement
itself is simple: irradiating samples with protons, detecting gamma-rays by a high-purity germanium detector,
and evaluating the cross sections. Over the period of
more than half a century, enormous measurements
have been performed for various nuclides, from light
nuclides to heavy ones, with various energies. There arestill cross sections which are either unknown or having large uncertainties. Especially, in the GeV energy
region which is important for ADS, activation cross section data are scarce for various nuclides. Although it ispossible to evaluate the cross-section data by particle
transport calculation codes, the calculated values stillneed to be verified by experiments in the end.
To measure activation cross section data, we havestarted an experiment at 3 GeV RCS to the Neutron
Facility Beam Transport (3NBT) dump (Fig. 14), in which
the proton beam energy can be changed from 0.4 GeV
to 3.0 GeV by changing the extraction timing of a kicker
magnet at RCS. We measured the cross-section data ofaluminum for the first at several energies from 0.4 GeV
to 3.0 GeV using a vacuum chamber (Fig. 15).

Fig. 14. Schematic view of the experimental area.

Owing to the high-intensity pulse beam of J-PARC,
the actual bombardment took around one minute. The
cross-section was also calculated by a particle transport
calculation code PHITS for comparison. In the calculation, it was found that the general evaporation model(GEM) in PHITS differed from the originally developed
one. We implemented successfully the original one.
This affected the production of lighter nuclides, suchas beryllium-7, since it evaporated from aluminum. The
results of the activation cross sections of aluminum,superposing calculations with some models, are shownin Fig. 16.
These results indicate that this experiment at 3NBT
is very useful since the experimental uncertainty islower than the other experimental data, and also that aTransmutation Studies

J-PARC Annual Report 201644
better intranuclear cascade model is strongly required.
As the next step, we will measure the activation crosssection data for various structural and target materials,
such as Be, Fe, Pb and Bi.

Fig. 15. The vacuum chamber.

High-Intensity Proton Beam Monitors
To observe the profile of the beam introduced
to the target at TEF-T, a luminescence beam profile
monitor is one of the candidates. Since the TEF-T target will receive 6 times higher than the beam current
density at the spallation neutron source of J-PARC, abeam monitor which can withstand the high current
density is required. To develop such beam monitors,
an experiment was performed by using a low-energy
argon beam at Takasaki Ion Accelerators for Advanced
Radiation Application (TIARA) of QST, which bring6
about 10 times as much displacements on the materials with respect to the displacements by 3-GeV protons.
Some prospective materials were examined concerning
degradation of luminescence.

In the experiment, a luminescence plate made ofaluminum oxide doped with 0.5% CrO3 with a thickness40
15+of 5 mm was irradiated with the 150-MeV 75 nA Ar
beam. During the beam irradiation, the luminescencefrom the plate was observed with the spectrometer asshown in Fig. 17. The spectrum has a prominent peakat 694 nm with several unresolved shoulder peaks pro3+
duced by the excitation state of Cr . After the irradiationfor 2.3 h which was equivalent to 100 hours irradiationof TEF-T, the peak intensity decreased by 35%. The
results indicate that further improvement in irradiation
resistance is needed to use the luminescence plate for
TEF-T. Since the intensity of the unresolved peak with awavelength region shorter than the 694 nm peak lessdecreased than the intensity at the peak, the degradation may be mitigated by observing the luminescence
only in the shorter wavelength with an optical filter.

Fig. 17. Observed spectra form the luminescence plate irra40 15+
diated with Ar beam.

Fig. 16. Comparison of cross sections (this experiment, other experiments,
evaluated data, and calculations) taken from H. Matsuda, et al., J.
Nucl. Sci. Tech. 2018 (to be published)J-PARC Annual Report 2016

Transmutation Studies

45

Other Activities and International Collaboration
Meeting and Workshops
The 14th International Workshop (General Meeting)on Asian Network for Accelerator-Driven System (ADS)and Nuclear Transmutation Technology (NTT) in 2016
(ADS-NTT 2016) was held in Mito on September 5. There
were many participants from Korea and China. There
were presentations on the R&D situations in Japan,
China and Korea, and an exchange of views on future
R&D issues for ADS and cooperation necessary to resolvethem.
The NEA Third International Workshop on Technology
and Components of Accelerator Driven Systems (TCADS3) was held in Mito from September 6 to 9. There were
58 participants from 13 countries. After the meeting, theparticipants toured test instruments, such as the liquid
lead-bismuth loop in the High Temperature Engineering
Test Building of the Nuclear Science Research Institute.
They asked questions and exchanged views regarding
the equipment and its operation.
Publicity for ADS Transmutation Technology
In order to promote understanding of the nuclear
transmutation technology using ADS, various activities
were performed using a 1/20 scale-model of the future
ADS Transmutor. The nuclear transmutation by ADS was
visually simulated in the ADS model by a motion flow of
LED lights. The model also had an LCD screen to display aslide show explaining the ADS research activities in JAEA.
At the open campus of J-PARC in July 2016, theNuclear Transmutation Division opened a booth to show

the research activities for ADS and related technology
developments in J-PARC. The 1/20-scale ADS model, theinner structure of lead-bismuth eutectic spallation target for material irradiation, and an oxygen concentration
sensor were exhibited at the booth. In December 2016,
JAEA opened a booth in Eco-Pro 2016 (see Fig. 18), heldin Tokyo Big Sight. The ADS model was also exhibited topromote the ADS transmutation technology as a technology useful in reducing the environmental impact of
nuclear waste disposal.
At both exhibitions, it became clear that the public was not fully aware of the promising option, nuclear
transmutation, which can contribute to solving the
problem of nuclear waste for sustainable nuclear energy
production.

Fig. 18. Exhibition at Eco-Pro 2016.

SafetySafety

J-PARC Annual Report 201648

Safety1.	M ajor Events on Safety Culture and Safety
Activities in the J-PARC Center
The major events on safety culture and safety activities in J-PARC center are listed in Table 1. The FY2016
workshops for fostering safety culture at J-PARC andthe 4th Symposium on safety in accelerator facilities aredescribed in the chapter “Events”
A practical training course on radiation protection was newly introduced in order to improve theradiation-safety literacy of the J-PARC staff. The themeof the training course this year was how to fit typical
protective gears used in radiation control areas. In the
training course, the participants learned practical skills
on how to put and remove rubber gloves, half-facemasks, full-face masks and Tyvek clothes. The trainingclass was held twice, on July 19 and August 5, following
the e-learning course on the same topics, which was
conducted from May 25 to June 16.
The J-PARC Safety Audit 2016 was conducted byoutside auditors (Prof. Takano of Keio University andProf. Ishibashi of Kyushu University) on November 22.
They heard information about the current status of thesafety management in the J-PARC Center and the activities in various fields by the facilities, and interviewed
the director, the deputy directors, the managers of facilities and other staff members. They evaluated positively
our safety management system as a whole. In addition,
they gave us valuable suggestions for enforcement ofsafety activities on a bottom-up and voluntary basis,
introduction of an award program for significant contributions to safety and load saving by simplification ofsome procedures and works.
2. Experience-Based Hazard Training
In order to raise workers’ safety awareness and toprevent work-related accidents, experience-based
simulated hazard training was introduced for practicalsafety training in FY2016.
The training courses in FY2016 were conducted on
May 25 and November 16 at the Iwaki Factory of KUREHA
Corporation, and on August 30 and February 17 at the
HITACHI Chemical Techno Service Co., Ltd. A total of 78
staff members attended these demonstration trainings. Judging from the participant’s comments, it was
confirmed that the trainings were effective for raising
their safety awareness. The trainings will be carried out
continuously to allow all staff members to gain safetyknowledge from the experience-based hazard training.

Fig. 1. Experience-Based hazard training (Flame from a spray
product).

3. Radiological License Update and Facility
Inspection
Applications to update the radiological license
were submitted to the Nuclear Regulation Authority
on August 5 and December 14. The major application
items are listed in Table 2. The permissions for the applications were issued on September 27 and February 2,
2017, respectively.
In FY2016, we have passed the facility inspections
twice. The first one was carried out on June 21 and waspassed on June 27. It targeted a change of the entranceof the accelerator room (RFQ-TS) and the construction of
the new beamline (BL23) at the MLF. The second inspection was carried out on November 4 and was passed on
November 7. It covered a change of the shielding structure to prepare the construction of a new beamline forthe high-velocity muon beam.
4. Meeting and Committee on the Radiation Safety
Matter
The basic policy on the radiation safety in J-PARC
are supposed to be discussed by the J-PARC Radiation
Safety Committee (RSC). Meanwhile, the J-PARC
Radiation Safety Review Committee (RSRC) is expected
to discuss the specific subjects on radiation safety in
J-PARC.
The RSC meetings were held three times and thoseof the RSRC, four times. The major issues are summarized in Table 3.
5. Radiation Exposure of Radiation Workers
Figure 2 shows the variation of the number of radiation workers in J-PARC since 2005. In JFY2016, 3275

J-PARC Annual Report 2016

Safety49
persons were registered as radiation workers in J-PARC.
Their number increased gradually year by year. The
spike in the number for 2014 was caused by the presence of more contractors than usual. They carried out
the construction work of the south experimental hall atthe HD facility, which is located in a radiation controlled
area.
Table 4 summarizes the distribution of annual
doses for each category of workers. The exposure dose
has been measured with an optically stimulated luminescence (OSL) dosimeter for β-ray and γ-ray and with aplastic solid-state track detector for neutrons. Almost all
workers were exposed less than the detection limit (Not
Detected, ND). Only one worker was exposed to morethan 5 mSv but it did not exceed the administrative
dose control value (7 mSv/year) at J-PARC. We should
continue to take care about the reduction in radiation
exposure by respecting the ALARA (“as low as reasonably achievable”) principle.

Fig. 2. Variation of the number of radiation workers in J-PARC.

Table 1. List of major events on safety in FY2016

Year

2016

2017

Date

EventsMay 20Workshop for fostering safety culture

July 19 and Aug. 5

Practical training course on radiation protection

Sep. 27

Refresher course on radiation safety

Oct. 28

Emergency drill assuming a fire accident

Nov. 22

Safety audit

Jan. 26-27

4th Symposium on safety in the accelerator facilities

Table 2. Major application items of the radiological license

Facility

Items of 1st application

Li• Maximum energy: 400 MeV → 420 MeV

MLF• New shielded radio isotope (137-Cs)• Change of the shield structure (preparation for thehigh-velocity muon experiment)• Construction and shutdown of the contamination
monitoring facility

HD• Beam intensity: 3.8 × 1016 →4.0 × 1016 protons/hour• Change of the shield structure (preparation for a
new primary beamline)• Transfer of exhaust monitoring device (HM2 →HM3)

Items of 2nd application• Increase of gas-holders at the exhaust facility

Safety

J-PARC Annual Report 201650
Table 3. Radiation Safety Committee (RSC) and Radiation Safety Review Committee (RSRC) in FY2016

No.

Date

Major Issues
The Radiation Safety Committee (three times)

25

th

26

th

27

th

12

th

13

th

th

• Policy on the radiological license update for the MLF and HD facilitiesth• Policy on the radiological license update for the MLF facilityth• New target system at the HD facility

12 May 2016
25 Oct. 2016
30 Mar. 2017

The Radiation Safety Review Committee (four times)th

15 Apr. 2016

• Update of the radiological license for the MLF and HD facilities• Revision of the detailed rule of local radiation protectionth

4 Aug. 2016

• Revision of the safety rule for X-ray generators• Use of the X-ray generator at the HD facility

14th
15

th

• Update of the radiological license for the MLF facility

19th Oct. 2016

• Revision of the operational rule for the MLF facilityth

13 Mar. 2017

• New target system at the HD facility

Table 4. Annual doses in FY2016

Dose range x (mSv)# ofworkers

5.0<xCollective dose
(person mSv)

Maximum dose
(mSv)

ND

0.1≤x ≤1.0

1.0<x ≤5.0

In-house staff

655

627

25

2

1

14.9

5.7

Users

1,118

1,118

0

0

0

0

0

Contractors

1,519

1,466

51

2

0

20.5

1.6

Total

3,275

3,194

76

4

1

35.4

5.7

User Service

User Service

J-PARC Annual Report 2016

52

Users Office (UO)
Outline
The J-PARC Users Office(UO) was organized inst2007. It opened an office on the 1 floor of the IBARAKI
Quantum Beam Research Center in Tokai-mura, in
December 2008. The UO maintains the Tokai Dormitory
for the J-PARC users. The UO provides on-site and WEB
support with a one-stop service for the utilization of
J-PARC. As of March 31, 2017, the UO had 16 staffs and 3
WEB Support SE staffs.
The J-PARC Users, after the approval of their experiment, follow the administrative procedures outlinedon the Users Office (UO) WEB portal site, related to theregistration as a J-PARC User, radiation worker registration, safety education, accommodation, invitation letterfor visa and other requirements. Then the UO staffs
provide them with support by e-mail. After their arrivalat J-PARC, the UO gives on-site assistance to the J-PARC
Users, like receiving the J-PARC ID, glass badge, andsafety education. Since 2015, the UO had been doing its
part to improve the J-PARC on-line experiment system
and make it more user-friendly.

1 Hitachi
Minami-ohta

TNiken-jaya
intersection

TOKAI
Smart ICJ PA
ATokai Village
OfficeJAEA Main Gate
(Central Security Office)[J-PARC]

Cocos
restaurant
62

PC depostore

Kakeagariintersection

Post Office

JR Tokai
StationTokai Hospital

Mobile phone
shop

Muramatsu
ShrineFire Station

Joban
Expressway

Magome-jujiro
intersection
349

Kasamatsu
Park

Ibaraki Higashi
National Hospital
245

Macdonald
Humbugger Shop
Lawson31

JR JobanLine

Naka-city Hall

3
2

Naka

Hitachinaka

Higashi MITO Expressway

1st row, right to left KAWAKAMI Megumi, ISHIKAWA Taeko, KOBAYASHI Sayuri, ENOKI Kaori, SAKAGAMI Keiichi, KATOGI Aki.
nd
2 , right to left; SANAO Ai, ONUKI Rika, HANAWA Masahiro, ISOZAKI Mari, NAMIKI Shinji, KIMURA Rie.

J-PARC Annual Report 2016

User Service

53

Activities of UO

J-PARC Users

Technical support

Technical contact
personResearch Proposal
Proposal Advisory
Committee

J-PARC Users Office
Procedures for J-PARC site
access
ID cardPortal site
Rental goods

Support Service for
Daily Life

Support for J-PARC Utilization

Accomodation
Rent-a-car
Living information

User room
Radiation/Facility
safety education

One-stop service for J-PARC users

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User Service

J-PARC Annual Report 2016

54

User Statistics
Users in 2016 (Japanese ⁄ Foreigners, person-days)
4,500

Foreigners
Japanese

4,000
3,500
3,000
2,500
2,000
1,500
1,000
500
0
4
2016

5

6

7

8

Users in 2016 (according to facilities,
person-days)

9

10

11

12

1
2017

Other 11

Nertrino
9,095

PrivateEnterprises
1,311

MLF
14,350

2,500

2,000

HadronNertrino

Accelerator

䠄ே᪥䠅

3,000
2,500
2,000

1,500
1,500

1,000

Foreign
Organizaons
9,320

PublicOrganizaons
1,665

Hadron
7,752

MLF

3

Users in 2016 (according to organizations,person-days)

Accelerator
1,379

䠄ே᪥䠅

2

1,000

500

500

0

0

Japanese UniversiesForeign Organizaons

Japanese
Universies
20,269Public Organizaons
Other

Private Enterprises

User Service

J-PARC Annual Report 201655

MLF Proposals Summary - FY2016
Table 1. Breakdown of Proposals Numbers for the 2016 Rounds
2016A

Beamline

2016B

Full Year

Submitted Approved Submitted Approved

Instrument

GU

GU

GU

GU

Submitted
PU/S

IU

Approved
ES

PU/S

IU

ES

BL01 4D-Space Access Neutron Spectrometer - 4SEASONS

11(1)

5(1)

15(0)

5(0)

3

1

2

3

1

2

BL02 Biomolecular Dynamics Spectrometer - DNA

16(1)

7(1)

19(1)

8(1)

2

1

0

2

1

0

8

1

6

0

0

0

0

0

0

0

2

2

0

0

18

0

0

18

0

0

9

3

12

3

2

1

0

2

1

0

BL03 Ibaraki Biological Crystal Diffractometer - iBIX

(100-b)(b)‡†

Accurate Neutron-Nucleus Reaction Measurement
BL04
Instrument - ANNRI
BL05 Neutron Optics and Physics - NOP

6

2

2

2

1

0

0

1

0

0

BL06 Neutron Resonance Spin Echo Spectrometers - VIN ROSE

0

0

0

0

1

0

0

1

0

0

BL08 Super High Resolution Powder Diffractometer - S-HRPD

11

3

12

6(0)

1

0

0

1

0

0

BL09 Special Environment Neutron Power Diffractometer - SPICA

0

0

0

0

1

0

0

1

0

0

Neutron Beamline for Observation and Research Use NOBORU

11

5

8

7

3

1

0

3

1

0

BL10

BL11 High-Pressure Neutron Diffractometer - PLANET

12(0)

8(0)

12(0)

8

0

1

0

0

1

0

BL12 High Resolution Chopper Spectrometer - HRC

12

4

9

3

1

0

0

1

0

0

BL14 Cold-neutron Disk-chopper Spectrometer - AMATERAS

28

4

22

6

4

1

1

4

1

1

Small and Wide Angle Neutron Scattering Instrument BL15TAIKAN

29(3)

9(3)

17(2)

9(2)

4

3

1

4

3

1

19

10

7

7

0

0

0

0

0

0

18(2)

8(2)

10(1)

4(1)

1

1

1

1

1

1

23(1)

4(1)

16(0)

5(0)

2

3

1

2

3

1

23

5

25

7

3

1

2

3

1

2

13

4

19

4

0

0

0

0

0

0

44

24

20

20

15

0

0

15

0

0

BL16

High-Performance Neutron Reflectometer with a horizontal
Sample Geometry - SOFIA

BL17 Polarized Neutron Reflectometer - SHARAKU
BL18

Extreme Environment Single Crystal Neutron Diffractometer SENJUBL19 Engineering Diffractometer - TAKUMI
BL20

Ibaraki Materials Design Diffractometer iMATERIA(100-b)(b)†‡

BL21 High Intensity Total Diffractometer - NOVA

19

7

17

7

1

0

0

1

0

0

BL22 Energy Resolved Neutron Imaging System - RADEN

18

6(0)

11(0)

7(0)

2

2

0

2

2

0

BL23 Polarization Analysis Neutron Spectrometer - POLANO

0

0

0

0

1

0

0

1

0

0

D1

Muon Spectrometer for Materials and Life Science
Experiments - D1

17(0)

6(0)

18(0)

1(1)

3

1

0

3

1

0

D2

Muon Spectrometer for Basic Science Experiments - D2

13

6

15

7

1

1

0

1

1

0

U

Muon U
Total

0

0

0

0

0

0

0

0

0

0

362

133

291

125

69

18

8

69

18

8

GU : General Use
PU : Project Use or Ibaraki Pref. Project Use
S : S-type Proposals
IU : Instrument Group Use
ES : Element Strategy† : Ibaraki Pref. Exclusive Use Beamtime (β = 80% in FY2016)‡ : J-PARC Center General Use Beamtime (100-β = 20% in FY2016)( ) : Proposal Numbers under Trial Use Access System or P-type proposals (D1,D2) in GU

User Service

J-PARC Annual Report 2016

56

J-PARC PAC Approval Summary after the 23rd Meeting(Co-)
Spokespersons
E03 K. Tanida

P04

J. C. Peng,
S. Sawada

Affiliation

JAEA

Kyoto U

E06 J. Imazato

KEK

K. Imai,
JAEA, Gifu U,
E07 K. Nakazawa,
Tohoku U
H. TamuraE08 A. Krutenkova ITEP
A. Sakaguchi, Osaka U,
E10
T. Fukuda
Osaka EC U
E11 T. Kobayashi

KEK

E13 H.Tamura
E14 T. Yamanaka
M. Iwasaki,
E15
T. Nagae

Tohoku U
Osaka URIKEN,
Kyoto U

E16 S. Yokkaichi

RIKEN

R. Hayano,
H. Outa
H. Bhang,
E18 H. Outa,
H. Park
E19 M. Naruki
E21 Y. Kuno
E22

S. Ajimura,
A. Sakaguchi

U Tokyo, RIKEN

Spectroscopic Study of X-Hypernucleus, 12XBe, via theC(K-, K+) Reaction

12

Approval status(PAC recommendation)
Stage 2
One day beam time shoud beallocated before the summer
shutdown

Beamline

K1.8

DeferredPrimary

Stage 2
New proposal based on the S-2S
spectrometer is required

K1.8

Measurement of T-violating Transverse Muon Polarization
Stage 1in K+ -> p0 m+ n Decays
Stage 2
Systematic Study of Double Strangeness System with an Highest priority for the upcoming
Emulsion-counter Hybrid Methodrunning period to complete themeasurement
Pion double charge exchange on oxygen at J-PARC
Stage 1
Production of Neutron-Rich Lambda-Hypernuclei with
the Double Charge-Exchange Reaction (Revised from
Stage 2
Initial P10)
Stage 2
Tokai-to-Kamioka (T2K) Long Baseline Neutrino
Two weeks additional beam time in
Oscillation Experimental Proposal
the spring 2017.
Gamma-ray spectroscopy of light hypernuclei
Stage 2
Proposal for KL -> p0 n n-bar Experiment at J-PARC
Stage 2A Search for deeply-bound kaonic nuclear states by inStage 2
flight 3He(K-, n) reaction
Measurements of spectral change of vector mesons inStage 1
nucleiA revised proposal for Run-0 is(previously "Electron pair spectrometer at the J-PARC 50required.
GeV PS to explore the chiral symmetry in QCD")
Registered as E62 with an updated
Precision spectroscopy of Kaonic 3He 3d->2p X-rays
proposal

K1.8

K1.8

K1.8BR

Data taking

High p

K1.8BR

High-resolution Search for Q+ Pentaquark in p-p -> K-X
ReactionsStage 2K1.8

E26 K. Ozawa

KEK

E27 T. Nagae

Kyoto U

E29 H. Ohnishi

RIKEN

E31 H. Noumi

Osaka U

T32 A. Rubbia

ETH, Zurich

P33 H. M. Shimizu Nagoya U
E34

N. Saito,
M. Iwasaki

KEK, RIKEN

E36

M. Kohl,
S. Shimizu

Hampton U,
Osaka U
Tohoku U

Li run finished, Betarget run with
S-2S

Finished
Data taking

KEK

KEK

5-day physics run
in June 2016

K1.8
KL

K1.8

Osaka U

Pilot run in Nov.
2015

neutrino Data taking

Stage 2

Osaka UIn preparation

K1.8

Coincidence Measurement of the Weak Decay of 12ΛC
and the three-body weak interaction process

Phase-I Stage 2
An Experimental Search for μ − e Conversion at a
8GeV test should be carried out in−16
Sensitivity of 10 with a Slow-Extracted Bunched Beamspring 2017.
Exclusive Study on the Lambda-N Weak Interaction inStage 1
A=4 Lambda-Hypernuclei
Extinction Measurement of J-PARC Proton Beam at
Test Experiment
K1.8BR(coord'ed by JPNC)
Search for w-meson nuclear bound states in the p-+AZ ->n+(A-1)w(Z-1) reaction, and for w mass modification in the Stage 1
in-medium w->p0g decay
Search for a nuclear Kbar bound state K-pp in the d(p+,K+)
Stage 2
reaction
Search for f-meson nuclear bound states in the pbar + AZ
Stage 1-> f + (A-1)f(Z-1) reaction
Stage 2
Spectroscopic study of hyperon resonances below KN
PAC supports requests of a second
threshold via the (K-,n) reaction on Deuteronrun
Towards a Long Baseline Neutrino and Nucleon Decay
Experiment with a next-generation 100 kton Liquid
Test Experiment
Argon TPC detector at Okinoshima and an intensity
upgraded J-PARC Neutrino beam
Measurement of Neutron Electric Dipole Moment
Deferred
An Experimental Proposal on a New Measurement of theMuon Anomalous Magnetic Moment g-2 and ElectricStage 1
Dipole Moment at J-PARC
Stage 2
Measurement of G(K+ -> e+ n)/G(K+ -> m+ n) and Search
The analysis status should be
for heavy sterile neutrinos using the TREK detector
reported regularly. Dark photon
systemanalysis should be done.
Measurement of the cross sections of Σp scatterings
Stage 2

Status

K1.1BR

SNU, RIKEN,KRISS

T25 S. Mihara

E40 K. Miwa-

Measurement of X rays from X Atom

U of Illinois
Measurement of High-Mass Dimuon Production at theat Urbana50-GeV Proton Synchrotron
Champaign; KEK

E05 T. Nagae

E17

Title of the experiment

Finished

COMET
K1.8
K1.8BR

Data taking

K1.8
K1.8

Data taking

K1.1
K1.8BR

Data taking

K1.1BR

Finished

Linac
MLF

K1.1BR

Finished
Data analysis

K1.8

In preparation

J-PARC Annual Report 2016

User Service

57
(Co-)
Spokespersons

Affiliation

Title of the experiment

Approval status(PAC recommendation)

An Experimental Search for μ − e Conversion in Nuclear
Field at a Sensitivity of 10−14 with Pulsed Proton Beam
Deferredfrom RCS
Pusan National Search for H-Dibaryon with a Large Acceptance Hyperon Stage 1
E42 J. K. Ahn
USpectrometer
TDR should be updated for Stage 2
K. H. Hicks, H.
3-Body Hadronic Reactions for New Aspects of Baryon
E45
Ohio U, JAEA
Stage 1
Sako
Spectroscopy
T46 K. Ozawa
KEK
EDIT2013 beam test program
Test Experiment
T49 T. Maruyama KEK
Test for 250L Liquid Argon TPC
Test Experiment
Stage 1The FIFC, IPNS, and E50 should
E50 H. Noumi
Osaka U
Charmed Baryon Spectroscopy via the (π,D*-) reaction
investigate the feasibility of thebeam- line
Research Proposal for COMET(E21) Calorimeter Prototype
T51 S. Mihara
KEK
Test ExperimentBeam Test

P41 M. Aoki

T52 Y. Sugimoto

Osaka U

KEK

Test of fine pixel CCDs for ILC vertex detector

Test ExperimentBeamline
MLF

Status
Reviewed in
MLF/IMSS

K1.8
K1.8
K1.1BR
K1.1BR

Abandonded
WithdrawnHigh p

K1.1BR
K1.1BR

had to be
stoppednot performedyet
not performed
yet

Test of GEM Tracker, Hadron Blind Detector and LeadTest Experiment
K1.1BR
glass EMC for the J-PARC E16 experiment
Test experiment for a performance evaluation of anot performed
T54 K. Miwa
Tohoku U
scattered proton detector system for the Σp scattering Test Experiment
K1.1BRyetexperiment E40
Second Test of Aerogel Cherenkov counter for the J-PARC
had to be
T55 A. Toyoda
KEK
Test Experiment
K1.1BRE36 experiment
stoppedStage 1
A Search for Sterile Neutrino at J-PARC Materials and LifeE56 T. Maruyama KEK
TDR should be submitted before
MLF
Science Experimental Facility
Stage-2 approval
Stefan Meyer
Stage 1
Institute for
Measurement of the strong interaction induced shift and It is not possible to accommodate
Commissioning run
E57 J. Zmeskal
K1.8BR
Subatomic
width of the 1s state of kaonic deuterium at J- PARC
the request in the upcoming
in 2016
Physics
running period.
A Long Baseline Neutrino Oscillation Experiment Using
P58 M. Yokoyama U. Tokyo
Deferredneutrino
J-PARC Neutrino Beam and Hyper-Kamiokande
A test experiment to measure neutrino cross sections
neutrino
T59 A. Minamino Kyoto U
using a 3D grid-like neutrino detector with a water target To be arranged by IPNS and KEK-T2K monitor Finishedat the near detector hall of J-PARC neutrino beam-line
bld
neutrino
T60 T. Fukuda
Toho U
Proposal of an emulsion-based test experiment at J-PARC Arranged by IPNS and KEK-T2K
monitor Finished
bld
Stage 1
Cost estimate for the identified
E61 M. Wilking
Stony Brook U nuPRISM
neutrino
Phase-1 site should be done before
stage-2 approval.
Stage 2
R. Hayano,
Commissioning run
PAC recommends the requested
E62 S. Okada,
U. Tokyo, RIKEN Precision Spectroscopy of kaonic atom X-rays with TES
K1.8BR
in 2016
beam time when K1.8BR becomes
H. Outaavailable.
BL not readyE63 H. Tamura
Tohoku U
Gamma-ray spectroscopy of light hypernuclei II
Stage 2
K1.1
yet. Exp. in
preparation
Measurement of the gamma-ray and neutron
T64 Y. Koshio
Okayama U
background from the T2k neutrino/anti-neutrino at
Arranged by IPNS and KEK-T2K
neutrino
J-PARC B
E65 T. Nakaya
Kyoto U
Proposal for T2K Extended Run
Stage 1
neutrino
T66 T. Fukuda
Nagoya U
Proposal of an emulsion-based test experiment at J-PARC Test Experimentneutrino
T53 D. Kawama

RIKEN

J-PARC Annual Report 2016

Organization and Committees

59

Organization and Committees

Organization and Committees

J-PARC Annual Report 2016

60

Organization Structure
J-PARC Center Organizaon Chart
as of April 1, 2016

Deputy Director(Safety)
T. Ishii

Radiaon Safety Secon

Safety Division
Y.Miyamoto - K. Bessho

Y. Kasugai - M. Numajiri, K. Seki
General Safety Secon
Y. Nakane
Accelerator Secon I
H. OguriAccelerator Secon II
K. Yamamoto
Accelerator Secon III
N. Hayashi

Accelerator Division
K. Hasegawa - M. Kinsho, F. Naito

Accelerator Secon IV
K. Kikuchi
Accelerator Secon V
Y. Hori
Accelerator Secon VI
N. Yamamoto
Accelerator Secon VII

N. Saito

F. Naito

Director

Neutron Source Secon
H. Takada - K. Haga

Deputy Director(JAEA)
M. Futakawa

Neutron Science Secon

Materials & Life Science
Division
M. Futakawa - H. Seto, K. Soyama

K. Sakasai
Muon Science SeconTechnology Development Secon
K. Aizawa - T. Oku

T. KosekiParcle & Nuclear Physics
Division
T. Kobayashi - T. Komatsubara, Y. Fujii

Advisor (J-PARC) : S. Nagamiya: Y. Ikeda: Y. Fujii

Neutron Instrumentaon Secon

R. Kadono – N. Kawamura

Deputy Director(KEK)

Director’s Office

K. Nakajima - Y. Kawakita, S. Itoh

Nuclear Transmutaon
Division

Neutrino Secon
T. Nakadaira
Hadron Secon
S. Sawada

M. Futakawa - F. Maekawa
Cryogenics Secon
Y. Makita - K. Sasaki
Informaon System Secon
A. Manabe - K. Gorai
Operaons Support Secon
H. Yoshikawa
Public Relaons SeconAdministraon Division
S. Ejiri -S. Miyamoto

T. Koseki - H. Terunuma
General Affairs Secon
S. Miyamoto - K. Suzuki
Users Affairs Secon
S. Ejiri - S. Harayama
Users Office

K. Sakagami

J-PARC Annual Report 2016

Organization and Committees

61

Members of the Committees Organized for J-PARC(as of March, 2016)

1) Steering Committee
Yuji Fujita

Japan Atomic Energy Agency, Japan

Hisayoshi Ito

Japan Atomic Energy Agency, Japan

Yukihide Kamiya

High Energy Accelerator Research Organization, Japan

Kazuo Minato

Japan Atomic Energy Agency, Japan

Yukitoshi Miura

Japan Atomic Energy Agency, Japan

Naohito Saito

J-PARC Center, Japan

Yasuhide Tajima

Japan Atomic Energy Agency, Japan

Daiji Takeuchi

High Energy Accelerator Research Organization, Japan

Katsuo Tokushuku

High Energy Accelerator Research Organization, Japan

Kazuyoshi YamadaHigh Energy Accelerator Research Organization, Japan

Seiya Yamaguchi

High Energy Accelerator Research Organization, Japan

2) International Advisory Committee
Jean-Michel Poutissou

TRIUMF, Canada

Francis Pratt

Science and Technology Facilities Council (STFC), UK

Jun Sugiyama

Toyota Central R & D Labs., Inc., Japan

Thomas Roser

Brookhaven National Laboratory (BNL), USA

Shinian Fu

Institute of High Energy Physics (IHEP), China

Eckhard Elsen

European Organization for Nuclear Research (CERN), Switzerland

Patricia McBride

Fermi National Accelerator Laboratory (FNAL), USA

Robert Tribble

Brookhaven National Laboratory (BNL), USA

Donald F. Geesaman

Argonne National Laboratory, USA

Karlheinz Langanke

GSI Helmholzzentrum für Schwerionenforschung, Germany

Hamid Aït Abderrahim

SCK· CEN, Belgium

Hirotada Ohashi

University of Tokyo, Japan

Paul Langan

Oak Ridge National Laboratory (ORNL), USA

Hidetoshi Fukuyama

Tokyo University of Science, JapanDan Alan Neumann

National Institute of Standards and Technology (NIST), USA

Andrew Dawson Taylor

Science and Technology Facilities Council (STFC), UK

3) User Consultative Committee for J-PARC
Tsuyoshi Nakaya

Kyoto University, Japan

Taku Yamanaka

Osaka University, Japan

Hiroaki Aihara

University of Tokyo, Japan

Takashi Kobayashi

High Energy Accelerator Research Organization (KEK), Japan

Hirokazu Tamura

Tohoku University, Japan

Tomofumi Nagae

Kyoto University, Japan

Takashi Nakano

Osaka University, Japan

Organization and Committees

J-PARC Annual Report 2016

62
Kazuhiro Tanaka

High Energy Accelerator Research Organization (KEK), Japan

Hiroyuki Noumi

Osaka University, Japan

Masaki Fujita

Tohoku University, Japan

Mitsuhiro Shibayama

University of Tokyo, Japan

Hideaki Kitazawa

National Institute for Materials Science(NIMS), Japan

Yoshiaki Kiyanagi

Nagoya University, Japan

Masaaki Sugiyama

Kyoto University, Japan

Tosiji Kanaya

High Energy Accelerator Research Organization (KEK), Japan

Jun Akimitsu

Okayama University/Hiroshima University, Japan

Tadashi Adachi

Sophia University, Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization (KEK), JapanJun Sugiyama

Toyota Central R&D Labs., Inc.

Hiroyuki Kishimoto

Sumitomo Rubber Industries, Ltd.

Takashi Noma

Canon Inc.

Kenya Kubo

International Christian University, Japan

Toshiro Tomida

Ibaraki Prefecture

Satoru Yamashita

University of Tokyo, Japan

Cheol-Ho Pyeon

Kyoto University, Japan

Yoshiyuki KajiJapan Atomic Energy Agency, Japan

4) Accelerator Technical Advisory Committee
Thomas Roser

Brookhaven National Laboratory (BNL), USA

Alberto Facco

Laboratori Nazionali di Legnaro (INFN), Italy

Alan Letchford

Science and Technology Facilities Council (STFC), UK

Subrata Nath

Los Alamos National Laboratory (LANL), USA

Akira Noda

National Institutes for Quantum and Radiological Science and Technology (QST),
Japan

Michael Plum

Oak Ridge National Laboratory (ORNL), USA

Jie Wei

Michigan State Univ., USA

Robert Zwaska

Fermi National Accelerator Laboratory (FNAL), USA

Simone Gilardoni

European Organization for Nuclear Research (CERN), Switzerland

Simone Gilardoni

European Organization for Nuclear Research (CERN), Switzerland

5) Neutron Advisory Committee
Robert McGreevy

Science and Technology Facilities Council (STFC), UK

Bertrand Blau

Paul Scherrer Institut (PSI), Switzerland

Mark Wendel

Oak Ridge National Laboratory (ORNL), USA

Yoshiaki Kiyanagi

Nagoya University, Japan

Christiane Alba-Simionesco

The Laboratoire Leon Brilloin (LLB), France

Jamie Schulz

Australian Nuclear Science and Technology Organization(ANSTO), Australia

Dimitri Argyriou

Ames Laboratory, USA

Chang Hee Lee

Korea Atomic Energy Research Institute KAERI), Korea

Mitsuhiro Shibayama

University of Tokyo, Japan

Masaaki Sugiyama

Kyoto University, Japan

J-PARC Annual Report 2016

Organization and Committees

636) Muon Science Advisory Committee
Francis Pratt

Science and Technology Facilities Council (STFC), UK

Thomas Prokscha

Paul Scherrer Institut (PSI), Switzerland

Andrew MacFarlane

University of British Columbia, Canada

Klaus Jungmann

University of Groningen, Netherland

Kenya Kubo

International Chiristian University, Japan

Toshiyuki Azuma

RIKEN, Japan

Yasuo Nozue

Osaka University, JapanJun Sugiyama

Toyota Central R & D Labs., Inc., Japan

7) Radiation Safety Committee
Seiichi Shibata

RIKEN, Japan

Yoshimoto Uwamino

RIKEN, Japan

Yoshihiro Asano

RIKEN, Japan

Tetsuo Noro

Kyushu University, Japan

Takeshi Murakami

Natinonal Insitute of Radiological Science, Japan

Yoshimoto Namito

High Energy Accelerator Research Organization (KEK), Japan

Shinichi Sasaki

High Energy Accelerator Research Organization (KEK), Japan

Hitoshi Kobayashi

High Energy Accelerator Research Organization (KEK), Japan

Kazuo Minato

Japan Atomic Energy Agency, Japan

Takeshi Maruo

Japan Atomic Energy Agency, Japan

Michio Yoshizawa

Japan Atomic Energy Agency, Japan

8) MLF Advisory Board
Jun Akimitsu

Okayama University/Hiroshima University, Japan

Yuji Kawabata

Kyoto University, Japan

Yoshiaki Kiyanagi

Nagoya University, Japan

Mitsuhiro Shibayama

The University of Tokyo, JapanJun Sugiyama

Toyota Central R&D Labs., Inc., Japan

Atsushi Nakagawa

Osaka University, Japan

Masaki Fujita

Tohoku University, Japan

Michihiro Furusaka

Hokkaido University, Japan

Tetsurou Minemura

Ibaraki Prefectural Government, Japan

Toshio Yamaguchi

Fukuoka University, Japan

Hiroshi Amitsuka

Hokkaido University, Japan

Kenya Kubo

International Christian University, Japan

Toshiji Kanaya

High Energy Accelerator Research Organization (KEK), Japan

Hideki Seto

High Energy Accelerator Research Organization (KEK), Japan

Takashi Kamiyama

High Energy Accelerator Research Organization (KEK), Japan

Toshiya Otomo

High Energy Accelerator Research Organization (KEK), Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization (KEK), Japan

Ryosuke KadonoHigh Energy Accelerator Research Organization (KEK), Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization (KEK), Japan

Ryosuke KadonoHigh Energy Accelerator Research Organization (KEK), Japan

Organization and Committees

J-PARC Annual Report 2016

64
Masatoshi Futakawa

Japan Atomic Energy Agency (JAEA), Japan

Kazuya Aizawa

Japan Atomic Energy Agency (JAEA), Japan

Masayasu Takeda

Japan Atomic Energy Agency (JAEA), Japan

Kazuhiko Soyama

Japan Atomic Energy Agency (JAEA), Japan

Kenji Nakajima

Japan Atomic Energy Agency (JAEA), Japan

Yukinobu Kawakita

Japan Atomic Energy Agency (JAEA), Japan

Jun-ichi Suzuki

Comprehensive Research Organization for Science and Society (CROSS), Japan9) Program Advisory Committee (PAC) for Nuclear and Particle Physics Experiments at the J-PARC 50 GeV Proton
Synchrotron
Nori Aoi

Osaka University, Japan

Ryuichiro Kitano

High Energy Accelerator Research Organization (KEK), Japan

Masahiro Kuze

Tokyo Institute of Technology, Japan

Hirokazu Tamura

Tohoku University, Japan

Kazunori Hanagaki

High Energy Accelerator Research Organization (KEK), Japan

Tetsuo Hatsuda

RIKEN Nishina Center for Accelerator-Based Science, Japan

Junji Haba

High Energy Accelerator Research Organization (KEK), Japan

Thomas E. Browder

University of Hawaii, USA

Simon I. Eidelman

Budker Institute of Nuclear Physics (BINP), Russia

Deborah Harris

Fermi National Accelerator Laboratory (FNAL), USA

Gino Isidori

University of Zurich, Switzerland

Steven Kettell

Brookhaven National Laboratory (BNL), USA

Josef Pochodzalla

University of Mainz, Germany

Wolfram Weise

Technical University of Munich, Germany

William A. Zajc

Columbia University, USA

10) TEF Technical Advisory Committee
Marc Schyns

SCK · CEN, Belgium

Eric Pitcher

Los Alamos Neutron Science Center (LANSCE), USA

Yacine Kadi

European Organization for Nuclear Research (CERN), Switzerland

Yoshiaki Kiyanagi

Nagoya University, Japan

Toshikazu Takeda

Univesity of Fukui, Japan

Juergen Konys

Karlsruhe Institute of Technology, Germany

Minoru Takahashi

Tokyo Institute of Technology, Japan

Main Parameters

Main Parameters

J-PARC Annual Report 2016

66
Present main parameters of Accelerator
Linac
Accelerated Particles
EnergyPeak Current

Negative hydrogen
400 MeV
40 mA
0.225 ms for MLF
0.5 ms for MR
25 Hz
324 MHz972 MHz

Pulse Width
Repetition Rate
Freq. of RFQ, DTL, and SDTL
Freq. of ACS
RCS
Circumference
Injection Energy
Extraction Energy
Repetition Rate
RF Frequency
Harmonic Number
Number of RF cavities
Number of Bending Magnet

348.333 m
400 MeV
3 GeV
25Hz
0.938 MHz → 1.67 MHz2
12
24
Main Ring

Circumference
Injection Energy
Extraction Energy
Repetition Rate
RF Frequency
Harmonic Number
Number of RF cavities
Number of Bending Magnet

1567.5 m
3 GeV
30 GeV~0.4 Hz1.67 MHz → 1.72 MHz
9996

Key parameters of Materials and Life Science Experimental Facility
Injection energy
Repetition rate

3 GeV
25Hz

Neutron Source
Target material
Number of moderators
Moderator material
Moderator temperature/pressure
Number of neutron beam extraction ports

Mercury3
Liquid hydrogen
20 K / 1.5 MPa
23

Muon Production Target
Target material
Number of muon beam extraction ports

Graphite4*

Neutron Instruments
Open for user program (general use)
Under commissioning/construction

19
1/1

*

Muon Instruments
Open for user program (general use)
Under commissioning/construction(* As of March, 2017)3
1/0

Events

EventsScience Café for Science and Technology
Week (April 24)
At a Science Café for the 57th Science and Technology Week organized by the Ministry of Education,
Culture, Sports, Science and Technology, J-PARC Centergave a presentation on the topic of neutrinos. The event
was held at Science Museum in Kitanomaru Park in Tokyo. There was a higher-than-expected turn-out of 34
attendees with a wide range of ages, from elementary
school to adults, and they packed the venue.

Participants challenged quizzes on mystery of neutrinos

Events

J-PARC Annual Report 2016

68

Exhibition at the G7 Science &Technology Ministers’ Meeting inTsukuba, Ibaraki (May 15-21)
A meeting of the science and technology ministers
of seven advanced countries (G7) was held in Tsukuba
Science City, and the J-PARC Center exhibited jointlywith KEK at a special exhibition for the meeting. During
the meeting on the 15th -17th, the exhibition boothwas visited by persons connected with the meeting andparticipants in a commemorative symposium. After thecommemorative symposium on the 15th, the ministers
from each country visited the booth, and Naohito Saito,
Director of the J-PARC Center, introduced the research
being conducted at J-PARC, and J-PARC’s system forinternational cooperation.

J-PARC Neutron Life Science Research
Meeting (May17-18)
This research meeting was jointly organized by the
J-PARC Center and the National Institutes for Quantum
and Radiological Science and Technology(QST) todeepen discussion of the degree to which researchusing neutron scattering contributes to life science,and its possibilities for the future. The meeting wasattended by about 45 researchers being active on thefront line in this field.

FY2016 Workshop 5.23 for Fostering
Safety Culture at J-PARC (May 20)

Research Institute of West Japan Railway Company (JRWest), was invited as a speaker, and he spoke on the
topic of “Safety Efforts in Airlines and Railways”.

KEK-PIP Advisory Committee(May 22-23)
An advisory committee to provide advice on KEK’s
Project Implementation Plan (PIP) for research planning was held at KEK Tsukuba, with 12 experts invitedfrom both inside and outside Japan. The committee
discussed four projects relating to J-PARC: the COMETII experiment ; the J-PARC accelerator enhancementand Hyper Kamiokande plan; expansion of the Hadron
Experimental Facility; and H-line construction and planning of a g-2/EDM experiment plan for the muon facility.

J-PARC-ESS Collaboration Workshop(June 1-2)
Construction of the European Spallation Source(ESS)by 17 European countries is underway in the city of Lundin Scania province, Sweden, with operation scheduled
to begin in FY2019. This workshop was held to coincide with a tour of J-PARC by 16 staff from the ESS site
in Sweden, primarily engineers. The workshop incorporated oral presentations and lively discussion on thelatest development, research, and findings regarding
both the technology and operation (including safety) ofaccelerators, neutron sources, and neutron instruments.

To keep fresh the lessons of the radioactive material leak incident at the Hadron Experimental Facility on
May 23, 2013, J-PARC holds a workshop every year toraise safety awareness of the staff members. This year,
the workshop was held on May 20 with the auditoriumof the Nuclear Science Institute as the main venue, andlive TV links with KEK Tsukuba Campus and KEK Tokai
Campus, Kenji Abe, principal researcher at the Safety

Participants of the workshop

J-PARC Hello Science (June22, July7)

Principal researcher Kenji Abe

In June and July, the J-PARC Center held J-PARC Hello
Science events for the science clubs of two elementary
schools in Tokai Village, and students were introduced
to the amazing world of batteries and magnets.

J-PARC Annual Report 2016

Events69
showing the high degree of interest among elementary school students in the village.

Club members challenged quizzes

The experiment with straws to learn propagation of waves

Lecture by Professor Takaaki Kajita
Commemorating his Nobel Prize inPhysics “Neutrinos: The Link Between
Space and Elementary Particles” (July 16)

J-PARC Facilities Opened to the Public
for the First Time in Four Years (July 31)

The J-PARC Center and Tokai Village jointly held alecture meeting at the Tokai Culture Center featuring
Takaaki Kajita, Director of the Institute for Cosmic Ray
Research, University of Tokyo, and winner of the 2015
Nobel Prize in Physics. There were about 700 participants, ranging from elementary and junior high school
students to adults, most from Tokai Village but also
from outside the prefecture.

J-PARC facilities were opened to the public for the
first time in four years(since 2012). At J-PARC, operations
were stopped in the summer for maintenance, andvarious facilities which ordinary people cannot usuallyenter were opened to the public: the MR (Main Ring)
accelerator (50Gev synchrotron), beamlines employing
superconducting magnets for neutrino experiments,
the Materials and Life Science Experimental Facility(MLF) and Hadron Facility. This event was blessed withfine weather, and about 1,600 people attended, fromboth inside and outside the prefecture.

Lecture “Neutrino are Amazing! -Nobel
Prizewinning Research has Changed theWorld-” (August 11)

Prof. Kajita

The J-PARC Center held a lecture on the topic ofresearch at J-PARC, as a summer vacation event at the
Ibaraki Science Museum of Atomic Energy. Two sessions
were held, one in the morning and one in the afternoon, and many children came to listen to the lecturesin a hall with capacity for 40.

J-PARC “Hello Science” Summer Vacation
Classes Featuring Scientific ExperimentsThe Power of Waves is Extraordinary(July 26, August 5 and 25)
During the summer vacation, J-PARC Hello Science
events were held three times for fifth and sixth grade
elementary school students in Tokai Village.This year,
students studied waves. At each class, there wereabout twice the original capacity of 12 students, thus

Explanation on neutrino oscillation

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J-PARC Annual Report 2016

70

Science Lecture: A Trip through SpaceTime Featuring the Neutrino Elementary
Particle (September 3 and 17)

13th International Workshop on
Spallation Materials Technology(October 31- November 4)

An NPO, HSE Risk C3 is engaged in support activities such as the Tokai Nuclear Power Science Town
Project promoted by Tokai village.This time, in response
to village residents’ interest in neutrinos, the NPO helda total of four lectures on the topic of “the neutrino
elementary particle”, including tours of J-PARC facilities. Shinichi Sakamoto, a public relations advisor of
the J-PARC Center worked as a lecturer, and in the two
lectures held this month, he explained everything;from the basics of neutrinos to the neutrino research
involved Nobel Prize in Physics in last year, and thelatest results such as the T2K (Tokai to Kamioka) experiment using J-PARC.

This workshop was held by the Oak Ridge National
Laboratory (ONRL) in the U.S., and there were 58 participants from 8 countries. Information was exchanged
on topics such as radiation damage to neutron source
materials for nuclear spallation, corrosion due to liquid
metal, and cavitation damage. There were 54 presentations from different countries, and there were 8 reports
from J-PARC on the current state of the MLF mercury
target, and the muon target.

3rd RaDIATE Collaboration Meeting(September 7-9)
A steering meeting of RaDIATE (Radiation Damage
in Accelerator Target Environment) in the process ofinternational collaboration by 11 institutions worldwide at present was held for three days with about
30 participants in early September at PNNL (PacificNorthwest National Laboratory) in the U.S. This time, as
participants from J-PARC, there were two staff in chargeof evaluating items such as beam window and target
materials of the Neutrino Experimental Facility, anddamage to target vessel materials for the MLF neutron
source.

Ozora Marche at the Daijingu andMuramatsu-san Kokuzodo Temple(October 8)
The Ozora Marche is held every year by the Tokai
Sightseeing Guide as an event for communicating theattractions of the culture and history of Tokai Village toyounger generations. J-PARC began exhibiting at Ozora
Marche from two years ago, and continued this year witha Science Experiment Corner where visitors could experience things like the world of low temperatures andexperiments using magnetic force. Visitors line up to see
the “Super-Conducting Rollercoaster” experiment, wherea superconductor magnet cooled with liquid nitrogen at-196 ˚C runs on rails, and the presentation was enjoyedby everyone from children to adults.

Held 1st Neutron and Muon School(November 22-26)
The J-PARC Center held the 1st Neutron and Muon
School using MLF beamlines at Ibaraki Quantum BeamResearch Center. This school was held for graduate
students, young researchers, and similar candidates
from the Asia/Oceania region, and is the successor of
the MLF School held three times until last year. There
were 29 participants, the majority of whom (16) werefrom overseas.

Participants, lecturers and executive committee members of
the school

Held Research Meeting “Towards HighPrecision Muon g-2/EDM Measurement
at J-PARC” (November 28-29)
At the H Line of the Muon Experimental Facility of
the MLF at J-PARC, a project is underway to precisely
measure the strength of magnetic force of the muon
called the “anomalous magnetic moment (g-2)” using
a completely new, previously unavailable experimental
technique. To realize this plan, the J-PARC Center jointly
held a research meeting, together with the Joint Institute for Computational Fundamental Science (JICFuS),
to realize improved precision of g-2 calculations andexperiments. At the meeting, there were 54 participants from 12 countries of the world (including 23 from

J-PARC Annual Report 2016

Events71
overseas), and there were lively discussions of new
theoretical techniques and experimental technologies.

Held J-PARC Hello Science Event “From‘atoms’ to ‘super strings’ – The Scientists
Fascinated by Elementary Particles”(December 5)
Starting this month, the J-PARC Center has begun
holding “J-PARC Hello Science” events to promote interaction between researchers and local people, using as avenue the food court of the Aeon Tokai Mall in front of
JR Tokai Station. From January of next year, the program
will also receive support from Tokai Village, and the planis hold events primarily at Aeon Tokai, while changing
the topic each time.

The 37th REIMEI Workshop on Frontiersof Correlated Quantum Matters andSpintronics (January 13-17)
At Tokai-mura Industry and Information Plaza “iVil”
and other sites, the Advanced Science Research Center(ASRC) of the Japan Atomic Energy Agency (JAEA) held
the 37th REIMEI Workshop together with University ofTokyo, Columbia University (U.S.) ,and the J-PARC Center.
On the first day, Shoji Nagamiya (previous Director of
the J-PARC Center) and Naohito Saito(current Director)
gave talks to about 40 participants, made up of graduate students and young researchers, providing an
overview of state-of-the-art research using quantum
beams, and introducing the current status and future
outlook for experiments/research being conducted at
J-PARC.

J-PARC Hello Science “Chocolate
Science”(January 21)
At the second gathering of J-PARC Hello Science,
J-PARC Center held a “Chocolate Science” event forscientifically considering the deliciousness of chocolate from the standpoint of crystal structure, and experiencing how the deliciousness changes with different
methods of making chocolate. There were 20 participants, ranging in age from children to adults.
J-PARC Hello Science at the food court of Aeon Tokai

Held International Workshop on Future
Potential of High-Intensity Proton
Accelerator for Particle Nuclear Physics:
HINT2016 (December 5-8)
The international workshop “HINT2016” was held at
Ibaraki Quantum Beam Research Center for four days,
and brought together 146 participants. This event has
been held at J-PARC since last year, and there werevarious reports and discussions focusing on the future
outlook for high-intensity accelerator facilities, and new
physics pioneered using high-intensity beams.

Participants tried making chocolate

4th Symposium on Safety in the
Accelerator Facilities (January 26-27)

Participants of HINT 2016

Since the radioactive material leak incident at the
Hadron Experimental Facility in 2013, the J-PARC Centerhas held safety symposiums every year for informationsharing and discussions to improve safety with persons
involved with accelerators both inside and outside
Japan.The featured topics this time were emergency

Events

J-PARC Annual Report 201672
response and electrical safety in accelerator facilities,
and the event was held with the participation of 131
attendees, including 47 from outside organizations
such as Japanese accelerator facilities, universities, andcompanies.

Exhibited Booth at American
Association for the Advancement of
Science(AAAS) (February 16-20)
At the Annual Meeting of the American Association for the Advancement of Science(AAAS) , the J-PARC
Center exhibited a booth jointly with the Japan Society
for the Promotion of Science, Institute of Physical andChemical Research (RIKEN), National Astronomical
Observatory, Kyoto University, and others. A variety ofvisitors came to the J-PARC booth, and many were seen
listening intently to the explanations of Saeko Okada,
Leader of J-PARC’s Public Relations Section.

J-PARC Center Kyoto University Branch
was established(February 22)
For collaboration and cooperation of High Energy
Accelerator Research Organization (KEK) and Kyoto
University, a memorandum of understanding (MoU)
signing ceremony was held at the J-PARC researchbuilding. This memorandum of understanding will
establish a J-PARC branch of Kyoto University at
KEK Tokai Building No.1 and allow Kyoto University
researchers and students to cooperatively research in
J-PARC. The branch will foster closer research cooperation between J-PARC and Kyoto University.

Participants of MOU signing ceremony

J-PARC Hello Science “What is anaccelerator?” (February 27)
At the 3rd gathering, J-PARC Center gave a lecture on“What is an accelerator?” and about 15 people attended.
J-PARC Center explained the operating principles of theaccelerator using a cathode-ray tube television, used inmany households until recently, as an example. It also
explained the history of accelerator development, andaccelerators at J-PARC as well as around world.

Ms.Okada, leader of PR section of J-PARC Center, explained
J-PARC at the booth

J-PARC Hello Science in Muramatsu
Elementary School (March 1)
J-PARC Center held “J-PARC Hello Science” at Tokaivillage Muramatsu Elementary School’s science club.
The theme was “the secret of light”. For the experiment of the three primary colors of light, participating
students were in wonder to see mixing three colorsof glowing liquid (blue, red and green) turn white.
Following the experiment, the students enjoyedmaking a kaleidoscope of light using a spectral sheet.
Upon leaving school, those participants were proudly
showing off their kaleidoscopes to friends.

J-PARC Annual Report 2016

Events73

Visitors
Yoichiro Matsumoto, Executive Director, RIKEN (May 24)
Tamar Sanikidze, Minister of Education and Science ofGeorgia (May 30)
Takashi Fujiwara, Member of the House of Representatives (September 20)
Delegation from the MIRAI Project including staff ofLund University (October 4)
Students making the kaleidoscope

FY2016 Quantum Beam Science Festa/8th MLF Symposium (March 14-15)
FY2016 Quantum Beam Science Festa was heldwith sponsors such as J-PARC Center, KEK Instituteof Materials Structure Science, and Comprehensive
Research Organization for Science and Society (CROSS).
The event was successful with as many as 580 participants. The second day, MLF Symposium was held witha theme, “aiming to maximize the performance andease of use of facility”. It had very active discussions on
research findings at the facility as well as the status of
the facility and areas of improvement, future planningfor MLF.

Reynald Pain, Director of IN2P3, CNRS (November 29)
Ingomar Lochschmidt, Head of Advantage Austria
Tokyo (January 26)

Events

J-PARC Annual Report 201674

There were 3,469 visitors to J-PARC for the period from April, 2016, to the end of March, 2017.
ln-house

Public Officers

2%
9%
Junior-high/High school
students, teachers

Foreigners
16%

VIP, lawmakers 1%

University
students,
experts
18%

20%

Local
residents
Media 1%

17%

Business16%

Publications

Publications

J-PARC Annual Report 2016

76(A) Publications in Periodical Journals
A-001
M. Harada, S. Hasegawa, Y. Kasugai,
S. Meigoet et al.
Status Report (22th J-PARC PAC): Searchingfor a Sterile Neutrino at J-PARC MLF (E56,
JSNS2)
arXiv:1610.08186 [physics.ins-det]
A-002
Muto, R. et al.
Development of Lambertson Magnet and
Septum Magnets for Splitting 30-GeV Proton
Beam in Hadron Experimental Facility at
J-PARCIEEE Trans. Appl. Supercond. Vol. 26, 0603904
A-003
Tanaka, K. H. et al.
Radiation-Resistant Magnets for J-PARC
IEEE Trans. Appl. Supercond. Vol. 26, 4000804
A-004
Kurimoto, Y.
A High Precision Power Supply for Fast Pulse
Current With a Digital Control System
IEEE Trans. Appl. Supercond. Vol. 26, 4302904
A-005
Miura, A. et al.
Beam profile monitor for intense, negative,hydrogen-ion beams in the J-PARC linac
J. Korean Phys. Soc. Vol. 69, p. 1005
A-006
Iinuma, H. et al.
Three-dimensional spiral injection scheme
for the g-2/EDM experiment at J-PARC
Nucl. Instrum. Methods Phys. Res. A Vol. 832,
p. 51
A-007
Yamamoto, M. et al.
Vacuum tube operation analysis undermulti-harmonic driving and heavy beamloading effect in J-PARC RCS
Nucl. Instrum. Methods Phys. Res. A Vol. 835,
p. 119A-008
Chin, Y. H. et al.
Two particle model for studying the effectsof space-charge force on strong head-tailinstabilities
Phys. Rev. Accel. Beams Vol. 19, 014201
A-009
Shobuda, Y. et al.
Triangle and concave pentagon electrodes
for an improved broadband frequency
response of stripline beam position monitors
Phys. Rev. Accel. Beams Vol. 19, 021003
A-010
Otani, M. et al.

Interdigital H-mode drift-tube linac design
with alternative phase focusing for muon
linac
Phys. Rev. Accel. Beams Vol. 19, 040101
A-011
Shobuda, Y. et al.
Theoretical study of a waveguide THz
free electron laser and comparisons withsimulations
Physical Review Accelerators and Beams(Internet), Vol. 19(9), 094201_1-094201_24(2016)
A-012
Kawaura, H. et al.
Operando Measurement of Solid Electrolyte
Interphase Formation at Working Electrodeof Li-ion Battery by Time-slicing Neutron
Reflectometry
ACS Appl. Mater. Interfaces, Vol. 8, 9540-9544(2016)
A-013
Tsukui, S. et al.
Neutron and X-ray single-crystal diffraction
from protein microcrystals via magneticallyoriented microcrystal arrays in gels
Acta Crystallographica Section D-Biologic, Vol.
72, 823-829 (2016)
A-014
Jhuo, H.-J.
New Processing Route with a Novel
Additive 1-Naphthalenethiol for Efﬁciency
Enhancement of Polymer Solar Cells
Adv. Funct. Mater., Vol. 26, 3094-3104 (2016)
A-015
Louchev, O. A. et al.
Photoionization pathways and thresholds ingeneration of Lyman-α radiation by resonant
four-wave mixing in Kr-Ar mixture
AIP Advances, Vol. 6, 95018 (2016)
A-016
Matsuo, T. et al.
Difference in the hydration water mobility
around F-actin and myosin subfragment-1
studied by quasielastic neutron scattering
Biochemistry and Biophysics Reports, Vol. 6,220-225 (2016)
A-017
Matsunaga, T. et al.
Dependence of Structural Defects in
Li2MnO3 on Synthesis Temperature
Chem. Mater., Vol. 28, 4143-4150 (2016)
A-018
Tsuchiya, Y. et al.
Layered NaxCrxTi1-xO2 as Bi-Functional
Electrode Materials for Rechargeable Sodium
Batteries

Chem. Mater., Vol. 28, 7006-7016 (2016)
A-019
Nishimura, S. et al.
High-Temperature Neutron and X-ray
Diffraction Study of Fast Sodium Transport inAlluaudite-type Sodium Iron Sulfate
Chem. Mater., Vol. 28, 2393-2399 (2016)
A-020
Niizeki, T. et al.
Structural Study of Silica Coating Thin
Layers Prepared from Perhydropolysilazane:
Substrate Dependence and Water
Penetration Structure
Coatings, Vol. 6, 64 (2016)
A-021
Ki, T. et al.
Cryogenic system for COMET experiment at
J-PARC
Cryogenics Vol. 77, p.25
A-022
Masuda, T. et al.
Molecular Gyrotops with a Five-Membered
Heteroaromatic Ring: Synthesis,
Temperature-Dependent Orientation of
Dipolar Rotors inside the Crystal, and its
Birefringence Change
Crystal Growth & Design, Vol. 16, 4392-4401(2016)
A-023
Mibe, T. et al.
極冷ミューオンビーム実現のためのミューオ
ニウム標的開発
High Energy News Vol. 35, p.110
A-024
Ichikawa, A. et al.
T2K実験2016年夏のハイライト
High Energy News Vol. 35, p.129
A-025
Nomura, T. et al.
J-PARC KOTO実験：最初の物理ラン結果と現状
High Energy News Vol.35, p.167
A-026
Murayama, R. et al.
J-PARC KOTO実験のために新たに組み込んだ円筒形光子検出器：インナーバレル
High Energy News Vol.35, p.176
A-027
Sekiguchi, T.
HINT2016研究会の報告High Energy News Vol.35, p.249
A-028
Strasser, P. et al.
New muonium HFS measurements at

J-PARC Annual Report 2016

Publications

77
J-PARC/MUSE
Hyperfine Interact. Vol. 237, p.124

J. Appl. Crystallogr., Vol.49, 120-127 (2016)

A-046
Miwa, K. et al.
Metallic Intermediate Hydride Phase of
LaMg2Ni with Ni-H Covalent Bonding:Precursor State for Complex Hydride
Formation
J. Phys. Chem. C, Vol. 120, 5926-5931 (2016)

A-029
Sasaki, K. et al.
Study of Magnetic Field Measurement
System for g-2/EDM Experiment at J-PARC
IEEE Trans. Appl. Supercond. Vol. 26, 0605604

A-038
Akutsu, K. et al.
Investigation of structure of a thin SiO2 layer
as an antifouling and corrosion-resistantcoating
J. Ceram. Soc. Jpn., Vol. 124, 172-176 (2016)

A-030
Ahn, J. K. et al.
Superconducting Dipole Magnet for
Strangeness Physics Program at J-PARC
IEEE Trans. Appl. Supercond. Vol. 26, 4002105

A-039
Evslin, J. et al.
The leptonic CP phase from T2(H)K and μ+
decay at rest
J. High Energy Phys. 02 (2016) 151

A-047
Saito, S. et al.
Li(+) Local Structure in Li-Tetraglyme Solvate
Ionic Liquid Revealed by Neutron Total
Scattering Experiments with the (6/7)Li
Isotopic Substitution Technique
J. Phys. Chem. Lett., Vol. 7, 2832-2837 (2016)

A-031
Matsukawa, T. et al.
Temperature Dependence of Crystal
Structure and THz Absorption Spectra ofOrganic Nonlinear Optical Stilbazolium
Material for High-Output THz-Wave
Generation
Infrared Milli. Terahertz Waves, Vol. 37, 540-550(2016)

A-040
Hirayama, M. et al.
Neutron reflectometry analysis of
Li4Ti5O12/organic electrolyte interfaces:characterization of surface structure changes
and lithium intercalation properties
J. Mater. Res., Vol. 31, 3142-3150 (2016)

A-048
Kodama, K. et al.
Local Structural Analysis of Half-Metallic
Ferromagnet CrO2
J. Phys. Soc. Jpn., Vol. 85, 94709 (2016)

A-032
Ki, T. et al.
Measurement of thermal contact
conductance between round-shaped
superconducting wires and rectangular slot
in copper block for application to cryogenictransfer tube
Int. J. Heat Mass Transf. Vol. 103, p. 165
A-033
Akiba, H. et al.
Nanometer-Size Effect on Hydrogen Sites in
Palladium LatticeJ. Am. Chem. Soc., Vol. 138, 10238-10243, 2016
A-034
Tremsin, A. S. et al.
Investigation of dissimilar metal welds byenergy- resolved neutron imaging
J. Appl. Cryst., Vol. 49, 1130-1140 (2016)
A-035
Oba, Y. et al.
Magnetic Scattering in the Simultaneous
Measurement of Small-Angle Neutron
Scattering and Bragg Edge Transmission
from SteelJ. Appl. Cryst., Vol. 49, 1659-1664 (2016)
A-036
Noda, Y. et al.
Contrast variation by dynamic nuclear
polarization and time-of-flight smallangle neutron scattering. I. Application
to industrial multi-component nanocomposites
J. Appl. Cryst., Vol. 49, 2036-2045 (2016)
A-037
Ohhara, T. et al.
SENJU: A new time-of-flight single-crystal
neutron diffractometer at J-PARC

A-041
H. Iwamoto et al.
Impact of PHITS spallation models on theneutronics design of an accelerator-driven
systemJ. Nucl. Sci. Technol., 53, pp. 1585-1594 (2016)
A-042
Cheol Ho Pyeon, Atsushi Fujimoto, Takanori
Sugawara, Takahiro Yagi, Hiroki Iwamoto etal.
Validation of Pb nuclear data by Monte Carloanalyses of sample reactivity experiments at
Kyoto University Critical AssemblyValidationof Pb nuclear data by Monte Carlo analysesof sample reactivity experiments at Kyoto
University Critical Assembly
J. Nucl. Sci. Technol., 53, pp. 602 - 612 (2016)
A-043
Sekine, Y. et al.
Nanoscopic structural investigation ofphysically cross-linked nanogels formed
from self-associating polymers
J. Phys. Chem. B, Vol. 120(46), 11996-12002(2016)
A-044
Kameda, Y. et al.
Microscopic Structure of Contact Ion
Pairs in Concentrated LiCl- and LiClO4Tetrahydrofuran Solutions Studied by LowFrequency Isotropic Raman Scattering and
Neutron Diffraction with (6)Li/(7)Li Isotopic
Substitution Methods
J. Phys. Chem. B, Vol. 120, 4668-4678 (2016)
A-045
Minato, T. et al.
Dynamic Behavior at the Interface
between Lithium Cobalt Oxide and an
Organic Electrolyte Monitored by Neutron
Reflectivity Measurements
J. Phys. Chem. C, Vol. 120, 20082-20088 (2016)

A-049
Kawasaki, T. et al.
Magnetic Structure of Divalent Europium
Compound EuGa4 Studied by Single-Crystal
Time-of-Flight Neutron Diffraction
J. Phys. Soc. Jpn., Vol. 85, 114711 (2016)
A-050
Iwasa, K. et al.
Broad Excitation Spectra between
Crystalline-Electric-Field Levels Associatedwith Non-Kramers Doublet Ground State of f
Electrons in PrNb2Al20
J. Phys. Soc. Jpn., Vol. 85, 123704 (2016)
A-051
Soda, M. et al.
Spin Model of O2-based Magnet in a
Nanoporous Metal Complex
J. Phys. Soc. Jpn., Vol. 85, 34717 (2016)
A-052
Ikeda, K. et al.
Inelastic Neutron-Scattering Study of Stripe
and Over-Doped Checkerboard Ordering in
Layered Nickel Oxide Nd2-xSrxNiO4
J. Phys. Soc. Jpn., Vol. 85, 023701 (2016)
A-053
Haku, T. et al.
Crystal Field Excitations in Breathing
Pyrochlore Antiferromagnet Ba3Yb2Zn5O11
J. Phys. Soc. Jpn., Vol. 85, 034721 (2016)
A-054
Togawa, Y. et al.
Symmetry, structure, and dynamics of
monoaxial chiral magnets
J. Phys. Soc. Jpn., Vol. 85, 112001/1-37 (2016)
A-055
Matsunaga, T. et al.
Structural Understanding of Superior Battery
Properties of Partially Ni-Doped Li2MnO3 as
Cathode Material

Publications

J-PARC Annual Report 201678
J.Phys. Chem. Lett., Vol. 7, 2063-2067 (2016)
A-056
Okuda, T. et al.
Effects of Mn Substitution on the
Thermoelectric Properties and Thermal
Excitations of the Electron-doped Perovskite
Sr1-xLaxTiO3J.Phys. Soc. Jpn., Vol. 85, 094717 (2016)
A-057
Hazama, H. et al.
Transport properties of the Cu2ZnSnS4 bulk
systems: Effects of nonstoichiometry anddefect formation
Journal of Alloys and Compounds, Vol. 657,
179-183 (2016)
A-058
Onuki, Y. et al.
Rapid measurement scheme for texture in
cubic metallic materials using time-of-flightneutron diffraction at iMATERIAJournal of Applied Crystallography, Vol. 49,
1579-1584 (2016)
A-059
Gubkin, A. F. et al.
Crystal and magnetic structures of
Cr1∕3NbSe2 from neutron diffraction
Journal of Applied Physics, Vol. 119, 13903(2016)
A-060
Sakaguchi, Y. et al.
Silver photo-diffusion and photo-induced
macroscopic surface deformation of
Ge33S67/Ag/Si substrate
Journal of Applied Physics, Vol. 120, 55103(2016)
A-061
Yoshida, K. et al.
Collective dynamics measurement of liquidmethanol by inelastic neutron scattering
Journal of Molecular Liquids, Vol. 222, 395(2016)
A-062
Kogawa, H. et al.
Cavitation damage prediction for the JSNS
mercury target vessel
Journal of Nuclear Materials, Vol. 468, 313-320(2016)
A-063
Naoe, T. et al.
Gigacycle fatigue behaviour of austenitic
stainless steels used for mercury target
vessels
Journal of Nuclear Materials, Vol. 468, 331-338(2016)
A-064
Naoe, T. et al.
In-situ structural integrity evaluation for
high-power pulsed spallation neutron

source; Effects of cavitation damage on
structural vibration
Journal of Nuclear Materials, Vol. 468, p.321 330 (2016)
A-065
Sugawara, T. et al.
Development of three-dimensional reactor
analysis code system for accelerator-driven
system, ADS3D and its application withsubcriticality adjustment mechanism
Journal of Nuclear Science and Technology,
Vol. 53(12), 2018-2027 (2016)
A-066
Shiotani, S. et al.
Degradation analysis of 18650-type lithiumion cells by operando neutron diffraction
Journal of Power Sources, Vol. 325, 404-409(2016)
A-067
Ninomiya, K. et al.
Negative muon induced elemental analysis
by muonic X-ray and prompt gamma-ray
measurements
Journal of Radioanalytical and Nuclear
Chemistry, Vol. 309, 65-69 (2016)
A-068
Habu, D. et al.
Crystal structure study of dielectric
oxynitride perovskites La1-xSrxTiO2+xN1-x(x = 0, 0.2)
Journal of Solid State Chemistry, Vol. 237, 254257 (2016)
A-069
Inukai, M. et al.
Encapsulating Mobile Proton Carriers into
Structural Defects in Coordination Polymer
Crystals: High
Journal of the American Chemical Society, Vol.
136, 8505-8511 (2016)
A-070
Kitamura, N. et al.
Hydrothermal synthesis of lanthanum
silicate nanopowder and film preparation byelectrophoretic deposition method
Journal of the Ceramic Society of Japan, Vol.
124, 29-33 (2016)
A-071
Sugiyama, J.
Study on Hydrogen Storage Materials
Journal of the Physical Society of Japan
A-072
Miyazaki, M. et al.
Quest for the Origin of Heavy Fermion
Behavior in d-Electron Systems
Journal of the Physical Society of Japan, Vol.
85, 91009 (2016)
A-073
Higemoto, W. et al.

Spin and time-reversal symmetries ofsuperconducting electron pairs probed
by the muon spin rotation and relaxation
technique
Journal of the Physical Society of Japan, Vol.
85, 091007 (2016)
A-074
Shimomura, K. et al.
Electronic Structure of Hydrogen Donors in
Semiconductors and Insulators Probed by
Muon Spin Rotation
Journal of the Physical Society of Japan, Vol.
85, 091013 (2016)
A-075
Adachi, T. et al.
Strong electron correlation behind thesuperconductivity in Ce-free and Ceunderdoped high-Tc T’-cuprates
Journal of the Physical Society of Japan, Vol.
85, 114716 (2016)
A-076
Kamiya, J. et al.
Detection of electron beam with a gas sheet
Journal of the Vacuum Society of Japan, Vol.
59(4), 79-82 (2016)
A-077
Kamiya, J. et al.
Vacuum technologies in high-power proton
accelerators
Journal of the Vacuum Society of Japan, Vol.
59(8), 213-221 (2016)
A-078
Kamiya, J. et al.
In situ baking method for degassing of a
kicker magnet in accelerator beam line
Journal of Vacuum Science and Technology A,
34(2), 021604_1-021604_10 (2016)
A-079
Takahashi, S. et al.
Inclusion Complex of α-Cyclodextrin withPoly(ethylene glycol) Brush
Macromolecules, Vol. 49, 6947-6952 (2016)
A-080
Su, Y. et al.
Time-of-flight neutron Bragg-edgetransmission imaging of microstructures inbent steel plates
Materials Science & Engineering A, Vol. 675,
19-31 (2016)
A-081
Zarei-Hanzaki, A. et al.
Grain-orientation-dependent of γ–ε–α'transformation and twinning in a superhigh-strength, high ductility austenitic Mnsteel
Materials Science and Engineering A, Vol. 674,
514-528 (2016)

J-PARC Annual Report 2016

Publications

79
A-082
Wang, Y. et al.
In-situ neutron diffraction during tensioncompression cyclic deformation of apearlite steel
Materials Science and Engineering: A, Vol.
676, 522-530 (2016)

A-092
Kanno, K. et al.
Development of a hadron blind detector
using a finely segmented pad readout
Nucl. Instrum. Methods Phys. Res. A Vol. 819,
p.20

A-083
Fukuda, K. et al.
Residual stresses in steel rod with collar
formed by partial diameter-enlarging
technique
Materials Science and Technology, Vol. 33,
172-180 (2016)

A-093
Maruyama, R. et al.
Study of the in-plane magnetic structureof a layered system using polarized
neutron scattering under grazing
incidence geometry
Nucl. Instrum. Methods Phys. Res. A, Vol. 819,
37-53 (2016)

A-084
Nishijima, H. et al.
Monitoring of Bainite Transformation
Using in Situ Neutron Scattering
Metals, Vol. 6(1), 16 (2016)

A-094
Sako, H. et al.
Studies of high density baryon matter withhigh intensity heavy-ion beams at J-PARC
Nucl. Phys. A Vol. 956, p.850

A-085
Nakano, S. et al.
Gelation process of polyacrylonitrile
solutions as studied using small‐angle
neutron scattering techniques
Microsystem Technologies, Vol. 22, 57-63(2016)

A-095
Nagamiya, S.
My Memory on QM Conferences
Nucl. Phys. A Vol. 956, p.911

A-086
Itoh, S. et al.
Weyl fermions and spin dynamics ofmetallic ferromagnet SrRuO3Nature Commun, Vol. 7, 11788 (2016)
A-087
Wang, Q. et al.
Magnetic ground state of FeSe
Nature Commun, Vol. 7, 12182 (2016)
A-088
Oh, J. et al.
Spontaneous decays of magnetoelastic excitations in noncollinear
antiferromagnet (Y,Lu)MnO3
Nature Commun, Vol. 7, 13146 (2016)
A-089
Yabuuchi, N. et al.
Origin of stabilization and destabilization
in solid-state redox reaction of oxide ionsfor lithium-ion batteries
Nature Commun, Vol. 7, 13814 (2016)
A-090
Kato, K. et al.
High-power all-solid-state batteries using
sulfide superionic conductors
Nature Energy, Vol. 1, 16030 (2016)
A-091
Fujiwara, T. et al.
Microstructured boron foil scintillating
G-GEM detector for neutron imaging
Nucl. Instr. and Meth. A, Vol. 838, 124-128(2016)

A-096
Nagamiya, S.
Heavy Ion Physics in the Future
Nucl. Phys. Res. A Vol. 956, p.248
A-097
Okabe, K. et al.
Development of the charge exchange typebeam scraper system at the J-PARC
Nuclear Instruments and Methods in Physics
Research A, Vol. 811, 11-17 (2016)

A-102
Lee, S. et al.
Novel magnetoelastic coupling forbidden
by time-reversal symmetry: Spin-directiondependent magnetoelastic coupling on
MnO, CoO, and NiO
Phys. Rev. B, Vol. 93, 64429 (2016)
A-103
Ruminy, M. et al.
Crystal-field parameters of the rare-earth
pyrochlores R2Ti2O7 (R = Tb, Dy, and Ho)
Phys. Rev. B, Vol. 94, 024430 (2016)
A-104
Ding, H. et al.
Spin excitations in optimally P-doped
BaFe2(As0.7P0.3)2 superconductor
Phys. Rev. B, Vol. 94, 094504 (2016)
A-105
Sim, H. et al.
Spontaneous structural distortion of themetallic Shastry-Sutherland system DyB4
by quadrupole-spin-lattice coupling
Phys. Rev. B, Vol. 94, 195128 (2016)
A-106
Khanh, N.D. et al.
Magnetoelectric coupling in thehoneycomb antiferromagnet Co4Nb2O9
Phys. Rev. B, Vol. 93, 075117 (2016)
A-107
Torigoe, S. et al.
Observation of all-in type tetrahedral
displacements in nonmagnetic pyrochlore
niobates
Phys. Rev. B, Vol. 93, 085109 (2016)

A-098
Takeda, S. et al.
Development of a large plano-ellipticalneutron-focusing supermirror withmetallic substrates
Opt. Express, Vol. 24, 12478-12488 (2016)

A-108
Hiraishi, M. et al.
Cage electron-hydroxyl complex state aselectron donor in mayenite
Phys. Rev. B, Vol. 93, 121201R (2016)

A-099
Saito, N. et al.
High-efficiency generation of pulsed
Lyman-α radiation by resonant laser wave
mixing in low pressure Kr-Ar mixture
Opt. Express, Vol. 24, 7566 (2016)

A-109
Kamano, H. et al.
Toward establishing low-lying Λand Σ hyperon resonances with the–
K+d→π+Y+N reaction
Phys. Rev. C, Vol. 94, 065205

A-100
Phillips II, D.G., et al.
Neutron-antineutron oscillations:
Theoretical status and experimental
prospects
Phys, Rep., Vol. 612, 1 (2016)

A-110
Hayakawa, T. et al.
Measurement of the isomer production
ratio for the 112Cd(n,γ)113Cd reaction using
neutron beams at J-PARC
Phys. Rev. C, Vol. 94, 055803-1-6 (2016)

A-101
Ruminy, M. et al.
First-principles calculation andexperimental investigation of latticedynamics in the rare-earth
Phys. Rev. B, Vol. 93, 214308 (2016)

A-111
Abe, K. et al.
Upper bound on neutrino mass based on
T2K neutrino timing measurements
Phys. Rev. D, Vol. 93, 012006

Publications

J-PARC Annual Report 2016

80
A-112
Abe, K. et al.
Measurement of the muon neutrino
inclusive charged-current cross section in
the energy range of 1-3 GeV with the T2K
INGRID detector
Phys. Rev. D, Vol. 93, 072002

Cross-link Inhomogeneity in Phenolic
Resins at the Initial Stage of Curing
Studied by 1H-pulse NMR Spectroscopy
and Complementary SAXS/WAXS andSANS/WANS with a Solvent-swellingTechnique
Polymer, Vol. 103, 152-162 (2016)

A-113
Abe, K. et al.
Measurement of double-differential muon
neutrino charged-current interactions on
C8H8 without pions in the final state using
the T2K off-axis beam
Phys. Rev. D, Vol. 93, 112012

A-121
Mashita, R. et al.
Dynamics of polybutadiene reinforced
with unsaturated carboxylate studied bymuon spin relaxation (mSR)
Polymer, Vol. 105, 510-515 (2016)

A-114
Sawada, T. et al.
Accessing proton generalized parton
distributions and pion distribution
amplitudes with the exclusive pioninduced Drell-Yan process at J-PARC
Phys. Rev. D, Vol. 93, 114034
A-115
Abe, K. et al.
Measurement of Muon Antineutrino
Oscillations with an Accelerator-Produced
Off-Axis Beam
Phys. Rev. Lett. Vol. 116, 181801
A-116
Sakaguchi, Y. et al.
Processes of silver photodiffusion into
Ge-chalcogenide probed by neutronreflectivity technique
PHYSICA STATUS SOLIDI A-APPLICATIONS
AND MATERIALS SCIENCE, Vol. 213, 18941903 (2016)
A-117
Hotchi, H. et al.
Beam loss caused by edge focusing of
injection bump magnets and its mitigationin the 3-GeV rapid cycling synchrotron of
the Japan Proton Accelerator ResearchComplex
Physical Review Accelerators and Beams(Internet), Vol. 19(1), 010401_1-010401_11(2016)
A-118
Tomioka, N. et al.
Hydrogen sites in the dense hydrous
magnesian silicate phase E: a pulsed
neutron powder diffraction study
Physics and Chemistry of Minerals, Vol. 43,
267-275 (2016)

A-122
Shimomura, S. et al.
Unswollen layer of cross-linked
polyisoprene at the solid interface
Polymer, Vol. 105, 526-531 (2016)
A-123
Imajo, S. et al.
Pulsed ultra-cold neutron production
using a Doppler shifter at J-PARC
Prog. Theor. Exp. Phys. 2016, 013C02

Iron Plasma Generation using a
Nd:YAG Laser Pulse of Several Hundred
Picoseconds
Rev. Sci. Instrum. 87, 02A919 (2016)
A-131
Oguri, H. et al.
Status of the RF-driven H− Ion Source for
J-PARC Linac
Rev. Sci. Instrum. 87, 02B138 (2016)
A-132
Ueno, A. et al.
Numerical study of plasma generation
process and internal antenna heatloadings in J-PARC RF negative ion source
Review of Scientific Instruments, Vol. 87(2),02B128_1-02B128_3 (2016)
A-133
Ueno, A. et al.
Fine-tuning to minimize emittances of
J-PARC RF-driven H- ion source
Review of Scientific Instruments, Vol. 87(2),02B130_1-02B130_5 (2016)

A-124
Masuda, T. et al.
Long-lived neutral-kaon flux measurement
for the KOTO experimentProg. Theor. Exp. Phys. 2016, 013C03

A-134
Ueno, A. et al.
Status of the RF-driven H - ion source for
J-PARC linac
Review of Scientific Instruments, Vol. 87(2),02B138_1-02B138_3 (2016)

A-125
Naito, D. et al.
Development of a low-mass and higheffeciency charged-particle detector
Prog. Theor. Exp. Phys. 2016, 023C01

A-135
Matsuda, Y. et al.
Phase relation, structure and ionic
conductivity of Li7−x−3yAlyLa3Zr2−xTaxO12
RSC Adv., Vol. 6, 78210-78218 (2016)

A-126
Sada, Y. et al.
–
Structure near the K+p+p threshold in thein-flight 3He(K−,Λp)n reaction
Prog. Theor. Exp. Phys. 2016, 051D01

A-136
Tremsin, A. S. et al.
Investigation of microstructure in
additive manufactured Inconel 625 byspatially resolved neutron transmission
spectroscopy
Sci. Technol. Adv. Mater., Vol. 17, 326 (2016)

A-127
Imajo, S. et al.
Pulsed UCN Production using a Doppler
Shifter at J-PARC
Prog. Theor. Exp. Phys., 2016, 013C02
A-128
Mukunoki, A. et al.
Microscopic structural analysis of leadborate-based glass
Progress in Nuclear Energy, Vol. 91, 339-344(2016)

A-119
Fujiwara, S. et al.
Dynamical Behavior of Human α-Synuclein
Studied by Quasielastic Neutron Scattering
PLoS ONE, Vol. 11(4), e0151447 (2016)

A-129
Yoshida, G. et al.
Chemical environmental effects on muontransfer process in low-pressure H2+COand H2+CO2 gases
RADIOISOTOPES, Vol. 65, 113-118 (2016)

A-120
Izumi, A. et al.

A-130
Tamura, J. et al.

A-137
Kobayashi, G. et al.
Pure H– conduction in oxyhydrides
Science, Vol. 351, 1314-1317 (2016)
A-138
Taminato, S. et al.
Real-time observations of lithium battery
reactions—operando neutron diffraction
analysis during
Scientific Reports, Vol. 6, 28843 (2016)
A-139
Komatsu, K. et al.
Partially ordered state of ice XVScientific Reports, Vol. 6, 28920 (2016)
A-140
Klotz, S. et al.
Ice VII from aqueous salt solutions: From aJ-PARC Annual Report 2016

Publications

81
glass to a crystal with broken H-bonds
Scientific Reports, Vol. 6, 32040 (2016)
A-141
Horigane, K. et al.
Spin excitations in hole-overdoped ironbased superconductors
Scientific Reports, Vol. 6, 33303 (2016)

A-142
Yano, N. et al.
Application of profile fitting method toneutron time-of-flight protein single
crystal diffraction data collected at the iBIX
Scientific Reports, Vol. 6, 36628 (2016)
A-143
Takahashi, H.

New phase transition in superprotonic
phase of Cs2(HSO4)(H2PO4)
Solid State Ionics, Vol. 285, 155-159 (2016)
A-144
Chen, D. et al.
Partial nitrogen loss in SrTaO2N and
LaTiO2N oxynitride perovskites
Solid State Sciences, Vol. 54, 2-6 (2016)(C) Conference Reports and Books
C‐001
Naito, F.
J-PARC Accelerator Status
Nucl. Part. Phys. Proc. Vol. 273-275, p. 181
C‐002
Tamura, F. et al.
Cavity voltage variation at beam
extraction in the J-PARC MR
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan (Internet), 808810 (2016)
C‐003
Kikuzawa, N. et al.
Operation status of J-PARC timing systemand future plan
Proc. of 15th International Conference on
Accelerator and Large Experimental Physics
Control Systems (ICALEPCS 2015) (Internet),
988-991 (2016)
C‐004
Hayashi, N.
Machine stability analysis by pulse-based
data archiver of the J-PARC RCS
Proc. of 4th International Beam
Instrumentation Conference (IBIC 2015)(Internet), 381-385 (2016)
C‐005
Igarashi, S.
RECENT PROGRESS OF J-PARC MR BEAM
COMMISSIONING AND OPERATION
Proc. of HB2016, Malmö, Sweden p. 21
C‐006
Saha, P. K. et al.
AN EXPERIMENTAL PLAN FOR 400 MeV
H− STRIPPING TO PROTON BY USING ONLYLASERS IN THE J-PARC RCS
Proc. of HB2016, Malmö, Sweden p. 310
C‐007
Shobuda, Y. et al.
STRIPLINE BEAM POSITION MONITORSWITH IMPROVED FREQUENCY RESPONSE
AND THEIR COUPLING IMPEDANCES
Proc. of HB2016, Malmö, Sweden p. 523
C‐008
Shirakata, M. J. et al.

NEW ARRANGEMENT OF COLLIMATORS OF
J-PARC MAIN RING
Proc. of HB2016, Malmö, Sweden p. 543
C‐009
Miura, A. et al.
BEAM TUNING FOR LONGITUDINALPROFILE AT J-PARC LINAC
Proc. of IBIC2016, Barcelona, Spain p. 150
C‐010
Hayashi, N. et al.
BEAM-LOSS MONITORING SIGNALS OF
INTERLOCKED EVENTS AT THE J-PARC
LINAC
Proc. of IBIC2016, Barcelona, Spain p. 368
C‐011
Nakanishi, Y. et al.
MEASUREMENT OF THE BEAM RESPONSETO QUADRUPOLE KICK BY USINGSTRIPLINE PICKUP MONITOR AT J-PARC
MAIN RING
Proc. of IBIC2016, Barcelona, Spain p. 604
C‐012
Friend, M. et al.
BEAM INDUCED FLUORESCENCE MONITOR
R&D FOR THE J-PARC NEUTRINO BEAMLINE
Proc. of IBIC2016, Barcelona, Spain p. 799
C‐013
Satou, K. et al.
PROFILE MEASUREMENT BY THE
IONIZATION PROFILE MONITOR WITH 0.2T
MAGNET SYSTEM IN J-PARC MR
Proc. of IBIC2016, Barcelona, Spain p. 811
C‐014
Miura, A. et al.
MULTI-LASER-WIRE DIAGNOSTIC FOR
THE BEAM PROFILE MEASUREMENT OF A
NEGATIVE HYDROGEN ION BEAM IN THE
J-PARC LINAC
Proc. of IBIC2016, Barcelona, Spain p. 856
C‐015
Semba, T. et al.
DESIGN AND MANUFACTURE OF A
SUPERCONDUCTING SOLENOID FOR
D-LINE OF J-PARC MUON FACILITY
Proc. of IPAC2016, Busan, Korea p. 1177

C‐016
Shibata, T. et al.
THE DEVELOPMENT OF A NEW HIGH FIELDINJECTION SEPTUM MAGNET SYSTEM FOR
MAIN RING OF J-PARC
Proc. of IPAC2016, Busan, Korea p. 1337
C‐017
Shibata, T. et al.
THE DEVELOPMENT OF A NEW LOW FIELDSEPTUM MAGNET SYSTEM FOR FASTEXTRACTION IN MAIN RING OF J-PARC
Proc. of IPAC2016, Busan, Korea p. 1340
C‐018
Yee-Rendon, B. et al.
ELECTRON CLOUD MEASUREMENTS AT
J-PARC MAIN RING
Proc. of IPAC2016, Busan, Korea p. 137
C‐019
Nakanishi, Y. et al.
THE DEVELOPMENT OF 16-ELECTRODE
MONITOR FOR MEASUREMENT OF THE
MULTIPOLE-MOMENT
Proc. of IPAC2016, Busan, Korea p. 140
C‐020
Otani, M. et al.
APF IH-DTL DESIGN FOR THE MUON
LINAC IN THE J-PARC MUON G-2/EDM
EXPERIMENT
Proc. of IPAC2016, Busan, Korea p. 1539
C‐021
Otani, M. et al.
DEVELOPMENT OF MUON LINAC FOR THE
MUON G-2/EDM EXPERIMENT AT J-PARC
Proc. of IPAC2016, Busan, Korea p. 1543
C‐022
Toyama, T. et al.
RESIDUAL RADIATION MONITORING BYBEAM LOSS MONITORS AT THE J-PARC
MAIN RING
Proc. of IPAC2016, Busan, Korea p. 2715
C‐023
Ikeda, N. et al.
RESIDUAL RADIATION MEASUREMENTS
AT J-PARC MR USING THE ASTROCAM
7000HS NEWLY DEVELOPED RADIOACTIVE

Publications

J-PARC Annual Report 2016

82
SUBSTANCE VISUALIZATION CAMERA
Proc. of IPAC2016, Busan, Korea p. 2719
C‐024
Yamamoto, M. et al.
SIMULATION OF BEAM BEHAVIOR CAUSEDBY ODD HARMONICS OF BEAM LOADINGIN J-PARC RCS
Proc. of IPAC2016, Busan, Korea p. 3443
C‐025
Sugimoto, T. et al.
PERFORMANCE OF THE COMPENSATIONKICKER MAGNET FOR J-PARC MAIN RING
Proc. of IPAC2016, Busan, Korea p. 3588
C‐026
Yee-Rendon, B. et al.
SIMULATIONS OF THE BEAM LOSS
DISTRIBUTION AT J-PARC MAIN RING
Proc. of IPAC2016, Busan, Korea p. 4175
C‐027
Ohmori, C. et al.
THE SECOND HARMONIC RF SYSTEM FOR
J-PARC MR UPGRADE
Proc. of IPAC2016, Busan, Korea p. 420
C‐028
Ohmi, K. et al.
BETA FUNCTION MEASUREMENT AND
RESONANCES INDUCED BY SPACE CHARGEFORCE AND LATTICE MAGNETS
Proc. of IPAC2016, Busan, Korea p. 641
C‐029
Park, G. T. et al.
ELECTROMAGNETIC DESIGN OF β = 0.13, f= 325 MHZ HALF-WAVE RESONATOR FOR
FUTURE HIGH POWER, HIGH INTENSITYPROTON DRIVER AT KEK
Proc. of IPAC2016, Busan, Korea p. 902
C‐030
Otani, M. et al.
DEVELOPMENT OF A MUON LINAC FOR
THE G-2/EDM EXPERIMENT AT J-PARC
Proc. of LINAC2016, East Lansing, USA p.
1037
C‐031
Shibata, T. et al.
LEBT COMMISSIONING OF THE J-PARC
LINAC
Proc. of LINAC2016, East Lansing, USA p. 251
C‐032
Tamura, J. et al.
DEVELOPMENT OF H0 BEAM DIAGNOSTIC
LINE IN MEBT2 OF J-PARC LINAC
Proc. of LINAC2016, East Lansing, USA p. 277
C‐033
Kondo, Y. et al.
A 3 MeV LINAC FOR DEVELOPMENT OF
ACCELERATOR COMPONENTS AT J-PARC
Proc. of LINAC2016, East Lansing, USA p. 298

C‐034
Kondo, Y. et al.
MUON ACCELERATION USING AN RFQ
Proc. of LINAC2016, East Lansing, USA p. 992
C‐035
Liu, Y. et al.
Progresses of J-PARC linac commissioning
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
MOP006
C‐036
Rehman, M. A. et al.
TEST EXPERIMENT OF 3-D SPIRALINJECTION SCHEME USING ELECTRONBEAM FOR NEW G-2/EDM EXPERIMENT AT
J-PARC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1004
C‐037
Satou, K. et al.
PRESENT PERFORMANCE OF A DCCT FOR
J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1076
C‐038
Toyama, T. et al.
THE KICK ANGLE CALIBRATION OF THE
EXCITER IN THE J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1081
C‐039
Miyao, T. et al.
PHASE RESOLUTION MEASUREMENT FOR
THE BUNCH SHAPE MONITOR AT J-PARC
LINAC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1094
C‐040
Miura, A. et al.
MULTI-LASER-WIRE DIAGNOSTIC FOR
THE BEAM PROFILE MEASUREMENT OFNEGATIVE HYDROGEN ION BEAM IN THE
J-PARC LINAC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1102
C‐041
Shibata, T. et al.
THE DEVELOPMENT OF NEW INJECTIONSEPTUM MAGNET FOR UPGRATING OF
J-PARC MR(2)Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 115

C‐042
Uota, M. et al.
DEVELOPMENT OF COLLIMATOR JAW OF
J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1189
C‐043
Shibata, T. et al.
THE DEVELOPMENT OF A NEW FIRSTEXTRACTION SEPTUM MAGNET FOR
UPGRADING OF J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1204
C‐044
Sugimoto, T. et al.
UPGRADE OF THE COMPENSATION KICKERMAGNET FOR J-PARC MAIN RING
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1209
C‐045
Tanaka, Y. et al.
DESIGN AND MANUFACTURE OF
SUPERCONDUCTING TRANSPORTSOLENOID FOR D-LINE AT J-PARC MUONSCIENCE FACILITY
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1230
C‐046
Igarashi, S.
ACCELERATOR BASED NEUTRINO
EXPERIMENTS T2K J-PARC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 14
C‐047
Nakanishi, Y. et al.
MEASUREMENT OF BEAM RESPONSE FOR
THE QUADRUPOLE KICKER WITH THE
STRIPLINE PICKUP IN J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 140
C‐048
Hasegawa, K. et al.
STATUS OF J-PARC ACCELERATORS
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 1409
C‐049
Yee-Rendon, B. et al.
ELECTRON CLOUD STUDY AT SXOPERATION MODE AT J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 149

J-PARC Annual Report 2016

Publications

83
C‐050
Shirakata, M.
SHIELD DESIGN FOR THE SCATTEREDNEUTRONS AT THE J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 213

C‐058
Yamada, S.
DEPLOYMENT OF A TINY FAN-LESS SERVERAS IOC IN J-PARC MAIN RING
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 634

C‐066
Tamura, F. et al.
CAVITY VOLTAGE VARIATION AT BEAM
EXTRACTION IN THE J-PARC MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 808

C‐051
Sugimura, T. et al.
DEVELOPMENT OF A VERTICALCOLLIMATOR AT THE MEBT1 OF J-PARC
LINAC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 307

C‐059
Kimura, T. et al.
UPGRADE PLAN OF BEAM ABORT SYSTEMIN J-PARC MR MPS
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 641

C‐067
Hara, K. et al.
STATUS REPORT OF DEVELOPMENT OF RF
CAVITIES WITH FT3L MA CORES IN J-PARC
MR
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japanp. 811

C‐052
Hirano, K. et al.
DEVELOPMENT OF BEAM SCRAPERS USING
A 3-MEV LINAC AT J-PARC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 310C‐053
Muto, R. et al.
DESIGN OF LARGE APERTURE SEPTUM
MAGNETS FOR THE SLOW EXTRACTION OF
8 AND 30 GEV PROTON BEAM
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 319C‐054
Futatsukawa, K. et al.
STUDY OF BEAM LOADINGCOMPENSATION WITH COMB-LIKE
STRUCTURE AT J-PARC LINAC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 327
C‐055
Ueki, K. et al.
UPGRADE OF MW-CLASS ANODE POWER
SUPPLY FOR J-PARC RCS
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 425

C‐060
Kamikubota, N. et al.
J-PARC MR’S EXPERIENCE OF VME-BUS
COMPUTERS IN THE LAST DECADE
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 644
C‐061
Kondo, Y. et al.
THE MUON LINAC FOR THE PRECISE
MEASUREMENT OF MUON G-2/EDM AT
J-PARC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 66
C‐062
Tomizawa, M. et al.
PRESENT STATUS AND FUTURE PLANS OF
J-PARC SLOW EXTRACTION
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 70
C‐063
Tani, N. et al.
CONCEPTUAL DESIGN OF MAIN MAGNETSFOR THE J-PARC RCS ENERGY UPGRADE
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 708

C‐056
Hori, T. et al.
DEVELOPMENT OF KLYSTRON PERVEANCEAND GAIN MONITOR IN J-PARC LINAC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 429C‐064
Morita, Y. et al.
HIGH-POWER TESTING OF POWERCONVERTER UNIT OF J-PARC MR MAIN
MAGNET POWER SUPPLY FOR HIGHREPETITION RATE OPERATION
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 712

C‐057
Kitamura, R. et al.
CURRENT STATUS OF THE MUON INITIALACCELERATION WITH RFQ FOR MUON G-2/
EDM EXPERMIENT
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 476

C‐065
Naito, D. et al.
EVALUATION OF MAGNETIC FIELD OF
J-PARC MR MAIN MAGNETS WITH HIGHREPETITION RATE OPERATION
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 717

C‐068
Otani, M. et al.
INTER-DIGITAL H-MODE DRIFT-TUBE
LINAC DESIGN WITH ALTERNATIVE PHASE
FOCUSING FOR MUON LINAC
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 858
C‐069
Kurimoto, Y.
A MULTI-PURPOSE DIGITAL CONTROLLER
BASED ON SYSTEM-ON-CHIP
TECHNOLOGIES
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 92
C‐070
Ohkoshi, K. et al.
STATUS OF THE J-PARC RF ION SOURCE
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japanp. 940
C‐071
Matoba, S. et al.
A replacement of a scraper for muon
production taeget at J-PARC/MLF
Proc. of the 12th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
TUP040
C‐072
Torii, H.A. et al.
High-precision microwave spectroscopyof muonium for determination of muonicmagnetic moment
International Journal of Modern Physics:
Conference Series, Vol. 40, 1660076 (2016)
C‐073
Shinohara, T. et al.
Final design of the Energy-Resolved
Neutron Imaging System “RADEN” at
J-PARCJ. Phys.: Conf. Series, Vol. 746, 012007 (2016)
C‐074
Hayashida, S. et al.

Publications

J-PARC Annual Report 201684
Crystal field excitations on NdFe3(BO3)4
investigated by inelastic neutron
scattering
J. Phys.: Conf. Series, Vol. 746, 12059 (2016)
C‐075
Ohoyama, K. et al.
Polarisation Analysis Neutron
Spectrometer, POLANO, at J-PARC –Concept and Magnetic Field Optimisation
J. Phys.: Conf. Series, Vol. 711, 12010 (2016)
C‐076
Ino, T. et al.
Conceptual Design of a Polarized 3He
Neutron Spin Filter for Polarized Neutron
Spectrometer POLANO at J-PARC
J. Phys.: Conf. Series, Vol. 711, 12011 (2016)
C‐077
Harjo, S. et al.
Dislocation Characteristics in LathMartensitic Steel by Neutron Diffraction
J. Phys.: Conf. Series, Vol. 746, 12046 (2016)
C‐078
Kawasaki, T. et al.
Line profile analyses of a martensitic steel
during continuous and stepwise tensile
deformations
J.Phys.: Conf. Series, Vol. 746, 12044 (2016)
C‐079
Sunaga, H. et al.
Texture evaluation in ductile fracture
process by neutron diffraction
measurement
J.Phys.: Conf. Series, Vol. 734, 32027 (2016)
C‐080
Kousaka, Y. et al.
Long Periodic Helimagnetic Ordering in
CrM3S6 (M = Nb and Ta)
J.Phys.: Conf. Series, Vol. 746, 012061 (2016)
C‐081
Kato, Y. et al.
Progress of the general control system
for the Materials and Life Science
Experimental Facility in J-PARC
JAEA-Conf, Vol. 2015-002, 593-598 (2016)
C‐082
Kogawa, H. et al.
In-situ structural integrity evaluation for
high-power pulsed spallation neutron
source by using a laser Doppler method
JAEA-Conf, Vol. 2015-002, 76-87 (2016)
C‐083
Suzuki, H. et al.
Structural Engineering Studies on
Reinforced Concrete Structure using
Neutron Diffraction
Materials Research Proceedings, Vol. 2, 25-30(2016)

C‐084
Morita, S. et al.
Profile measurement of a bent neutron
mirror using an ultrahigh precision noncontact measurement system with an auto
focus laser probe
Meas. Sci. Technol., Vol. 27, 74009 (2016)
C‐085
Louchev, O. A. et al.
Efficient pulsed Lyman-alpha radiation
generation by resonant laser wave mixing
in low-pressure Kr-Ar gas
NP in Proceedings Photonics and Fiber
Technology 2016, NM3A.4 (2016)
C‐086
Nakatsugawa, Y.
Search for Muon to Electron Conversion in
Nuclear Field at J-PARC MLF
Nucl. Part. Phys. Proc. Vol. 273-275, p. 1692
C‐087
Harjo, S. et al.
Monitoring of Dislocation in LathMartensitic Steels during Deformation
Proc. of 11th International Symposium
on Advanced Science and Technology inExperimental Mechanics, 1-4 (2016)
C‐088
Sasa, T. et al.
Development of plug-in type ultrasonicflowmeter for lead-bismuth spallation
target system
Proc. of 11th International Topical Meetingon Nuclear Reactor Thermal Hydraulics,
Operation and Safety (NUTHOS-11) (USBFlash Drive) (2016)
C‐089
Kogawa, H. et al.
Progress of target system operation at thepulsed spallation neutron source in J-PARC
Proc. of 12th International Topical Meetingon Nuclear Applications of Accelerators(AccApp ‘15), 297-304 (2016)
C‐090
S. Meigo, et al.
RESEARCH AND DEVELOPMENT OF HIGHINTENSITY BEAM TRANSPORT TO THE
TARGET FACILITIES AT J-PARC
Proc. of 12th International Topical Meetingon Nuclear Applications of Accelerators(AccApp ‘15), p.255 - 260, (2016)
C‐091
S. Meigo, et al.
Development of beam transport tospallation neutron source at J-PARC with
non-linear optics
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan PASJ2016 p.
120-124 (2016).

C‐092
H. Takei, et al.
PRELIMINARY RESULTS OF THE LASERCHARGE EXCHANGE TEST USING THE
3-MEV LINAC IN J-PARC
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan PASJ2016
p.987-991 (2016).
C‐093
Kikuzawa, N. et al.
Updating HBase/Hadoop in the J-PARC
operation data archiver with making
the data collection tool redundant byZookeeper
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan (Internet), 637640 (2016)
C‐094
Hotchi, H. et al.
Conceptual design of main magnets for
the J-PARC RCS energy upgradeProc. of 13th Annual Meeting of Particle
Accelerator Society of Japan (Internet), 708711 (2016)
C‐095
Yamamoto, K. et al.
Current status of the kicker magnet power
supply in 3-GeV RCS
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan (Internet), 725728 (2016)
C‐096
Miura, A. et al.
Preliminary results of the laser charge
exchange test using the 3-MeV linac in
J-PARC
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan (Internet), 987991 (2016)
C‐097
Hayashi, N. et al.
Development of a control system at a 3
MeV linac in J-PARC
Proc. of 13th Annual Meeting of Particle
Accelerator Society of Japan (Internet), 647651 (2016)
C‐098
Kikuzawa, N. et al.
Development of the J-PARC time-series
data archiver using a distributed databasesystem, 2
Proc. of 15th International Conference on
Accelerator and Large Experimental Physics
Control Systems (ICALEPCS 2015) (Internet),
818-821 (2016)
C‐099
Itoh, S. et al.
Instrument Developments and Neutron
Brillouin Scattering Experiments on HRC
Proc. of 21st Meeting of International

J-PARC Annual Report 2016

Publications

85
Collaboration on Advanced Neutron Sources(ICANS-XXI), JAEA-Conf 2015-002, KEK
Proceedings 2015-7, 298 (2016)

Muon Acceleration using an RFQ
Proc. of LINAC2016, East Lansing, MI, USA,992 (2016)

C‐100
Hayashi, N. et al.
Bunch length analysis of negativehydrogen ion beam in J-PARC linac
Proc. of 4th International Beam
Instrumentation Conference (IBIC 2015)(Internet), 386-389 (2016)

C‐109
Tamura, J. et al.
Development of H0 Beam Diagnostic Linein MEBT2 of J-PARC Linac
Proc. of LINAC2016, East-Lansing, MI, USA,277 (2016)

C‐101
Tamura, F. et al.
Simulation of beam behavior caused by
odd harmonics of beam loading in J-PARC
RCS
Proc. of 7th International Particle Accelerator
Conference (IPAC ‘16) (Internet), 3443-3445(2016)C‐102
Kamiya, J. et al.
A Non-destructive profile monitor using agas sheet
Proc. of 7th International Particle Accelerator
Conference (IPAC ‘16) (Internet), 2102-2104(2016)C‐103
S. Meigo, et al.
HIGH POWER TARGET INSTRUMENTATIONAT J-PARC FOR NEUTRON AND MUON
SOURCES
Proc. of HB2016, Malmö, Sweden p. 391 - 396(2016)C‐104
H. Takei, et al.
PRESENT STATUS OF THE LASER CHARGEEXCHANGE TEST USING THE 3-MeV LINAC
IN J-PARC
Proc. of IBIC2016, Barcelona, Spain, p. 736739 (2016).
C‐105
Igarashi, Y. et al.
Data Acquisition System for the J-PARC
E36 ExperimentProc. of IEEE-NPSS Real Time Conf. 2016,
Padua, Italy 7543154
C‐106
Kondo, Y. et al.
Baseline Design of a Proton Linac for BNCTat OIST
Proc. of IPAC16, Busa, Korea, 906 (2016)
C‐107
Kondo, Y. et al.
A 3-MeV Linac for Development of
Accelerator Components at J-PARC
Proc. of LINAC2016, East Lansing, MI, USA,298 (2016)
C‐108
Kondo, Y. et al.

C‐110
Maruyama, T.
Searching for a Sterile Neutrino at J-PARC
MLF: JSNS2 experimentProc. of Science, ICHEP2016, 482
C‐111
Tanaka, K.
The Reopening of the Research Activitiesof the Hypernuclear and Hadron Physics at
the J-PARC Hadron Hall
Proc. of Science, INPC2016, 087
C‐112
Nagakura, N. et al.
Precise neutron lifetime experiment using
pulsed neutron beams at J-PARC
Proc. of Science, INPC2016, 191
C‐113
Hirano, K. et al.
Development of Beam Scrapers using A
3-MeV Linac at J-PARC
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 310
C‐114
Chishiro, E. et al.
Improvement of High Voltage Rectifier of
J-PARC Klystron Power Supply
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 400C‐115
Hori, T. et al.
Development of Klystron Perveance andGain Monitor in J-PARC Linac
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 429
C‐116
Kondo, Y. et al.
The Muon Linac for the Precise
Measurement of Muon g-2/EDM at J-PARC
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p. 66
C‐117
Ohkoshi, K. et al.
Status of the J-PARC RF Ion Source
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japanp. 940
C‐118
Suganuma, K. et al.
Present Status of Water Cooling System at
J-PARC LINAC
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, Chiba, Japan
p.304
C‐119
Niizeki, T. et al.
Study of waterproof thin-layers for themagnetic alloy core by neutron reflectivity
Proc. of the 13th Annual Meeting of Particle
Accelerator Society of Japan, 1240 (2016)
C‐120
Kume, T.
SAXS and SANS study on the structuralchange of human stratum corneum
induced by the treatment of surfactant
solutions
Proc. of the 7th Japan-Taiwan Joint Meetingon Neutron and X-ray Scattering, 27-28(2016)
C‐121
Tajima, O. et al.
Sensing of the Atmospheric Water Vapor
with Millimeter Wave SpectrometerKUMODeS
Progress In Electromagnetic Research
Symposium (PIERS)2016, Shanghai, China
p. 4157
C‐122
Kino, K. et al.
Two-dimensional imaging of charge/
discharge by Bragg edge analysis ofelectrode materials for pulsed neutronbeam transmission spectra of a Li-ion
battery
Solid State Ionics, Vol. 288, 257-261 (2016)
C‐123
Suzuki, K. et al.
Synthesis, structure, and electrochemical
properties of crystalline Li–P–S–O solid
electrolytes: Novel lithium-conducting
oxysulfides of Li10GeP2S12 family
Solid State Ionics, Vol. 288, 229-234 (2016)
C‐124
Ishikawa, Y. et al.
Crystal structure of R10Mo6O33 (R = Nd,Pr) from 3 K to 973 K by neutron powder
diffraction
Solid State Ionics, Vol. 288, 303-306 (2016)
C‐125
Morishita, T. et al.
Fabrication Technorogy and Operational
Status of the RFQ in J-PARC
第17回高エネ研メカ・ワークショッププロシーディングス, 18 (2016)

Publications

J-PARC Annual Report 2016

86(D) KEK Reports
D-001
Safety Division J-PARC Center et al.
Annual Report on the Activities of Safety
in J-PARC, FY2015
KEK Internal 2016-11

D-002
Miyake, Y.
KEK-MSL REPORT 2015
KEK Progress Report 2016-3(F) Others
F-001
Yamane, I. et al.
Feasibility Study on Laser Stripping
Injection for J-PARC RCS
Kasokuki Vol. 13, No. 2, p. 80
F-002
Yamane, I.
Multi-Laser-Wire Profile Monitor for J-PARC
400 MeV H- Beam
Kasokuki Vol. 13, No. 3, p. 130

F-003
Otomo, T. et al.
Materials Science of Hydrogen Storage
Materials with Accelerator Based Neutron
SourceKasokuki Vol.13, No.4, p198

Kasokuki Vol.13, No.4, p220
F-005
Yonemura, M.
Application of Neutron Beams to Studies
of Battery and Related Materials
Kasokukl Vol.13, No.4, p239

F-004
Mishima, K.
Neutrons for Elementary Particle, Nuclear,ans Astrophysics(J) JAEA Reports
J-001
Kasugai, Y. et al.
Measurement of High-energy Neutron
Fluxes and Spectra around the J-PARC
Mercury Spallation Neutron Target using
Multi-foil Activation Method
JAEA-Data/Code 2015-033 (2016)
J-002
Sugawara, T. et al.
Thermal Design Study of Lead-bismuth
Cooled Accelerator Driven System(1) Study on Thermal Hydraulic Behavior
under Normal Operation Condition
JAEA-Data/Code 2016-008 (2016)
J-003
Sasa, T.
Proceedings of the First Topical Meetingon Asian Network for Accelerator-driven
Systems and Nuclear Transmutation
Technology
JAEA-Review 2015-042 (2016)
J-004
Sasa, T. et al.
Fabrication and Test Results of Testing
Equipment for Remote-handling of
MA Fuel (1) Testing Equipment for Fuel
Cooling
JAEA-Technology 2015-051 (2016)
J-005
Sugawara, T. et al.
Fabrication and Test Results of Testing
Equipment for Remote-handling of
MA Fuel (2) Evaluation of Heat Transfer
Parameter Crossing Rectangular Lattice

Matrix
JAEA-Technology 2015-052 (2016)
J-006
Sasa, T. et al.
Fabrication and Test Results of Testing
Equipment for Remote-handling of
MA Fuel (3) Testing Equipment for Fuel
Loading
JAEA-Technology 2016-029 (2016)
J-007
J-PARCセンター 核変換ディビジョン
J-PARC核変換実験施設技術設計書; ADS
ターゲット試験施設(TEF-T)
JAEA-Technology 2017-003, 539 Pages,(2017)

J-PARC Annual Report 2016
Vol.1: Highlight(C) J-PARC Center
March 2018

JAPAN PROTON ACCELERATOR RESEARCH COMPLEXHigh Energy Accelerator Research Organization (KEK)
Japan Atomic Energy Agency (JAEA)

IbarakiTokai

J-PARCTokyo

JR Joban L ine

Mito
Mt.Tsukuba

Narita

Ueno
Tokyo

0

20

40km

2-4 Shirakata, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan

http://j-parc.jp/

J-PARC 17-08