J-PARC
ANNUALREPORT2 O 1 2J A PA N P R O T O N A C C E L E R AT O R R E S E A R C H C O M P L E X

J-PARC Annual Report 2012
Contents
Preface……………………………………………………………………………………………………………

1

Accelerators………………………………………………………………………………………………………

3

Overview……………………………………………………………………………………………………… 4
LINAC………………………………………………………………………………………………………… 5
RCS…………………………………………………………………………………………………………… 7
MR…………………………………………………………………………………………………………… 9Materials and Life Science Experimental Facility………………………………………………………………… 13
Overview…………………………………………………………………………………………………… 14
Neutron Source…………………………………………………………………………………………… 16
Neutron Science…………………………………………………………………………………………… 18
Muon Science……………………………………………………………………………………………… 22
Neutron Device…………………………………………………………………………………………… 24
Particle and Nuclear Physics……………………………………………………………………………………… 25
Hadron and Nuclear Physics ……………………………………………………………………………… 26
Kaon Physics ……………………………………………………………………………………………… 27
Muon Physics ……………………………………………………………………………………………… 28
Neutrino Experimental Facility …………………………………………………………………………… 28
Cryogenics Section ……………………………………………………………………………………………… 31
Overview…………………………………………………………………………………………………… 32
Superconducting Magnet System for the T2K Beamline…………………………………………………… 32
Superconducting Kaon Spectrometer (SKS)………………………………………………………………… 32
The Superconducting Magnet System for the Muon Beam Line at MLF…………………………………… 33
Cryogen Supply and Technical Support…………………………………………………………………… 33
R&D for the J-PARC Project: COMET………………………………………………………………………… 34
R&D for the Future J-PARC Project: New Muon g-2/EDM and Muonium HFS……………………………… 34
Information System……………………………………………………………………………………………… 35
J-PARC Network (JLAN) Upgrade…………………………………………………………………………… 36
Statistics of Network Utilization …………………………………………………………………………… 36
Statistics of Computer Resource Utilization………………………………………………………………… 38
Transmutation Studies…………………………………………………………………………………………… 41
Activities…………………………………………………………………………………………………… 42
Safety …………………………………………………………………………………………………………… 45
Radiation Safety…………………………………………………………………………………………… 46
Users Office ……………………………………………………………………………………………………… 49
User Program……………………………………………………………………………………………………… 53

Organization and Committees…………………………………………………………………………………… 61
Organization Structure …………………………………………………………………………………… 62
Members of the Committees Organized for J-PARC………………………………………………………… 63
Main Parameters ………………………………………………………………………………………………… 67
Events ……………………………………………………………………………………………………………… 69
Events……………………………………………………………………………………………………… 70
Publications……………………………………………………………………………………………………… 77
Publications in Periodical Journals ………………………………………………………………………… 78
Conference Reports and Books…………………………………………………………………………… 82
JAEA Reports ……………………………………………………………………………………………… 86
KEK Reports ………………………………………………………………………………………………… 86

J-PARC Annual Report 2012

Preface1

Preface
In this report, we are summarizing primarily the activities and outcomesfrom July 2012, after the restoration from the 2011 Earthquake, to May 2013
before the radioactive material leak accident at the Hadron Experimental
Facility occurred, whereas all the statistics are given based on the numbersof FY2012 (April 2012 to March 2013). In this period, the critical part of therestoration work from the damage caused by the earthquake was completed,and eight cycle operations were reserved for users in FY2012 and two cycles
in April and May 2013, following the original schedule.
The most remarkable achievement is that the proton beam powerincreased smoothly as planed, like as 310 kW from the 3 GeV synchrotron (RCS)
to the Materials and Life Experimental Facility (hereafter MLF), and 50-300 kW
at the fast extraction mode from the 50 GeV synchrotron (the main ring) to
the Neutrino Experimental Facility (hereafter Neutrino), and also at the slow
extraction mode about 15 kW to the Hadron Experimental Facility (hereafter
Hadron). Users conducted many experiments with appreciably stable as wellas high intensity beams at all J-PARC facilities. Consequently, year 2012 was atime of remarkable progress.

Preface

J-PARC Annual Report 20122

Regarding the MLF progress, two new neutron beamlines of SPICA and
PLANET were added into the instrumental suit, and the commissioning
was carried out almost on schedule and became available for users fromthe beginning of April 2013. At long last the construction of the new highintensity ultra-slow muon beamline began in the MUSE for the muon users.
It also should be noted that the world’s highest intensity muon beam was
successfully obtained at the D-line. A significant increase in the number of
proposals for general use at the MLF also indicated the sound recovery fromthe earthquake’s aftermath.
As of the neutrino T2K experiment, event data for the electron neutrino
appearance at the detector, Super Kamiokande, had accumulated steadily
with increasing the number of POT (protons on target) at J-PARC. The T2K
collaboration presented the first experimental indication for oscillations frommuon neutrinos to electron neutrinos at an international conference in the fallof 2012.
One of the most important achievements in this period was that we finallycould start a user operation for the kaon experiments at the Hadron withusing up to 15 kW power at the slow extraction mode of the MR.
Over all, we demonstrated that in this period J-PARC was the worldclass forefront multi-purpose experimental facility in terms of high beam
performance.

Yujiro Ikeda
Director of the J-PARC CenterAccelerators

Accelerators

J-PARC Annual Report 20124

Overview
J-PARC was extensively damaged by the earthquake
on March 11, 2011, but it was successfully restored. We
started the beam tuning in December 2011 and the user
programs in January 2012.
The accelerator’s status in FY 2012 (from April 2012
to March 2013) and partially in FY 2013 is summarized in
Figure 1. The main topics related to the beam operation
are as follows:(1) The user operation was planned about 190 days intotal and we had delivered beam to the users almost
as scheduled in FY 2012.
(2) In the beginning of April 2012, the beam power fromthe 3-GeV RCS (Rapid Cycling Synchrotron) for MLF
users was 200 kW. We demonstrated 275 kW delivery
for about 3 days at the end of June, which was a preparatory operation for further power up. In November we achieved a power jump from the 200 kW levelto 270 kW for the users’ beam. Beams with power of
300 kW have been constantly delivered to MLF since
January 2013.
(3) We demonstrated new record power levels of over
500 kW (equivalent beam) for MLF and the beam loss
data were compared with those of simulations andmeasured before the earthquake.
(4) The user run of MR-FX (Main Ring-Fast eXtraction)
started at 160 kW, and the power was increased to
220–230 kW.
(5) The user run of MR-SX (Main Ring-Slow eXtraction)
started at 3.5 kW, and the power was increased to 24
kW. An extraction efficiency of 99.5% has been maintained for the Hadron users. We also demonstrated
30 kW extraction in the accelerator study.
The operation statistics and the trip time by system
in FY 2012 are shown in Figures 2 and 3, respectively. The
total operation time was 6,328 hours (including startup
and conditioning) and the user operation hours and thebeam availability rate of each experimental facility are
as follows: 4,664 hours (93%) for MLF; 3,323 hours (89%)
for NU (Neutrino); and 907 hours (88%) for HD (Hadron).
These statistics indicate that there were no significant
problems in FY 2012.
At the beginning of the J-PARC operation in 2008,
we encountered troubles in the RFQ (Radio Frequency
Quadrupole linac). Recently, however, the number oftrips caused by the RFQ was reduced to several per day,and the main reason of the downtime was a problem
with the high voltage power supply system (HVDC) of
the linac.
Some of the work done to repair the earthquake
damage to the linac building was not compatible withthe beam operation. The repair work resumed in thesummer shutdown period from July 2012. The fixing of
the cranes in the klystron gallery and in the accelerator
tunnel was completed. In addition, the walls and thepillars were also repaired, and grout was poured into thehollow spaces under the floor before the beam operation was resumed in September.
A full energy (400 MeV) and higher peak beam
current (50 mA) linac is required to reach the nominal
performance of 1 MW at RCS and 0.75 MW at MR. For
the energy upgrade, we plan to install a new accelerating structure ACS (Annular-ring Coupled Structure) anda 400 MeV RCS injection system. And we also need toincrease the peak beam current by replacing the ion
source and the RFQ. The MR fast extraction aims at thedesigning power by shortening the repetition cycle. To
implement this, the development of a main electromagnet power supply with a high repetition rate and an
acceleration system with high gradient is the key. The
R&D and construction for power upgrade components
are proceeding.

FY2012Month
Cperation(Run#)
MLF (3 GeV)

4

5

#42

6
#43

8

9

Summer
Maintenance

10

11

#44

12

1

#45

2

#46

3

4

5

556kWeq.

210kW 270-290kW

300kW

14kWeq.

20kWeq.

3.5→6kW11kW 10-15kW

30kWeq.
14kW15-24kW220kWeq.
160-190kW

6#48 #49#47

534kWeq.
200-220kW 275kW

MR-Slow Ext.
(30 GeV)
MR-Fast Ext.
(30 GeV)7

FY2013160-200kW

200-220kW

eq.:Equvalent beam power (Single shot or short period demonstration)

Fig. 1. Run summary of FY 2012.

200-230kW

HadronAccident

7

J-PARC Annual Report 2012

Accelerators

5

Fig. 2. Operation statistics of MLF and NU+HD in FY 2012. The total operation time was 6,328 hours.

80
60
40
20

BLM
RFQ
MEBT
DTL
SDTL
DBNCH
HVDC
IonSource
MagnetVAC
Others
BLM
KMPS
BM
QM
SM
ST
Bump
Sep
RF
OthersBLM
Others
BLM
QM
SM
BM
ST
RF
Injction
SlowExt
FastExt
OthersMLF
HadronNeutrino
Eaethquake
PowerOutage

0_LINAC__RCS__3NBT__MR__EXP_Others_

Fig. 3. Downtime statistics in hours by components in FY 2012 (April 2012 – March 2013).

LINAC
After the summer shutdown in 2012, we increased
the beam power for the MLF user operation from 220 kW
to 300 kW, which corresponds to a linac beam power of
18 kW. In November 2012, we conducted a beam study
to demonstrate our highest beam power from RCS. In
this study, the linac peak current was increased from thenominal 15 mA to 25 mA. The RCS beam power reached
540 kW, which corresponds to a linac beam power of 33
kW. The beam loss measurement in the demonstration
operation indicated that we can increase the linac beam
power to 30 kW with reasonable increase of beam loss.
The bunch shape monitor has been developed
under collaboration with the INR (Institute for Nuclear

Research: Russia) for the measurement of the longitudinal beam distribution. In order to perform the test
measurement, three monitors were installed during
the summer shutdown in 2012, and the commissioning
was performed. In that commissioning, we successfully
obtained the bunch profile of the H– beam at the end of
the SDTL (Figure 4).
An RFQ had been a component with the highest
trip rate since the discharge problem in 2008, but thetrip rate decreases to comparable to other linac components by performing the conditioning at the interval of
the beam operation continuously. Other linac components such as the klystron and SDTL are keys to improv-

Accelerators

J-PARC Annual Report 20126
ing the total linac availability. In February 2013, thetrip rate of the klystron for DTL2 increased significantly.
Because we suspected that the trip was caused mainly
by an electron gun in the klystron, we replaced the klystron with a spare one.
At SDTL5, there is an unstable power region where
the VSWR increases sharply. Moreover, the region widened during the operation and forced us to increase theoperating amplitude to 116% just before the summer
shutdown in 2012. To solve this problem, we improved
the vacuum condition of the cavity, and performed
careful conditioning of the cavity during the shutdown period. As a result of the countermeasures, theupper limit of the unstable power region successfully
decreased.
The filament-driven ion source is supplying thebeam without any serious troubles. The results of recent
beam runs show that the ion source is capable of continuous operation for 1,100 hours with a beam currentof approximately 20 mA.
The linac power upgrade program is now in progress. The program includes an upgrade of the intensity
and the energy of the linac. For the intensity upgrade,we plan to replace the ion source and the RFQ to delivera peak current of 50 mA. For the energy upgrade, theenergy will be increased to 400 MeV by adding ACS after
the SDTL.
A cesiated RF-driven H− ion source has been developed for the program. The ion source extracts a beamof more than 60 mA with a duty factor of 2.5%, which
satisfies the requirements of the program. From theexperimental results of a continuous operation thatlasted a hundred hours, the total cesium consumption
for 50 days was estimated to be 0.74 g. A spark rate ofless than once a day was observed at this consumption
rate. The value seems to be acceptable because it is thesame level as that of the current cesium-free ion source.
The fabrication of a new RFQ for 50 mA acceleration

was completed in March 2013. All the mechanical andlow power RF measurements and checks were finished.
The results showed that the alignment precision, thefield distribution and the vacuum characteristics were
within the desired goals. An RFQ test stand was newly
constructed to perform the beam acceleration test of
the new RFQ before the installation to the linac (Figure5). The RF-driven H– ion source will be tested simultaneously to check the stability and reliability through thelong term continuous operation.
The mass production of the ACS modules was completed, and the modules are now stored in the J-PARC
linac building until the installation onto the beam line
starts in August, 2013 (Figure 6). Currently, pumps andvacuum components are being installed on the cavities for testing the vacuum conditions. We started thehigh power test of the ACS modules in 2010, however,
the test was suspended because the test area was damaged due to the earthquake in 2011. The test area wasrestored in March 2013, and we are now preparing toresume the test. Before the installation it will be possible to test only five modules at most, because of time
constraints. The remaining modules, therefore, have to
be conditioned after the installation.

Fig. 4. Example of a bunch shape monitor measurement.

Fig. 5. RFQ test stand for the beam acceleration test of the new RFQ.

J-PARC Annual Report 2012

Accelerators

7

Fig. 6. ACS modules waiting to be installed.

RCS
The user operation resumed from mid-January 2012
with a 120 kW beam for the MLF and a 300 kW equivalent beam for the MR, respectively, after the earthquake.
The beam power gradually increased, and then, on 13th
January 2013, it reached 300 kW for the MLF users. There
were no significant problems and the average availability was about 95% for this specific year. The activationof the RCS components was measured after 24 days ofcontinuous user operation with a beam power of 300
kW. The activation was measured on the surface of thebeam pipe and the point at one foot distance 4 hours
after the beam stopped. The measurement didn’t show
very high activation area because the highest value
was about 1.2 mSv/h on the surface of the beam pipe
close to the beam collimator. When we need to work
close to this location, we should take care to reduce theexposure, that is why we already prepared an additionalradiation shield to be used during maintenance.
During this year we made mainly five progresses forstable and high intensity operation of the RCS. To reducethe beam loss in the RCS and for the users, it would benecessary to work on a treatment for leakage field and a
new painting scheme operation. We performed a highintensity beam trial of up to 540 kW and also improved
the beam simulation code. The preparation for the 400
MeV beam injection has continued and new power supplies for painting the bump magnet have already been
in-service for the user operation. The details of several
advancements are described as follows:

1) Treatment for leakage field at the extraction area.
One source of beam loss in the RCS is the leakage
magnetic field from the beam transport line (called the
3NBT line) at the extraction area. To reduce this leakage magnetic field, new vacuum chambers and bellows
made from permeability alloy (called permalloy) were
installed in the straight section of the extraction area.
Since these chambers were installed close to steering
magnets, the magnetic field strength of the steering
magnet-deceased by about 30%, caused by the permalloy bellows. However, it was no problem to do COD
correction because the power supplies of the steering
magnets had sufficient margin to do it. The leakage
magnetic field from the 3NBT line could be reduced bymore than 50% for the dipole, skew dipole and quadrupole components and by more than 25% for the skew
quadrupole component. These values are sufficiently
small to realize much lower beam loss in the case of a
300 kW beam power user operation.
2) Difference in the beam shape for the MLF and the MR.
There are two difference requirements for the beamof the RCS from the MLF and the MR, because the RCS
is a power source for the MLF and the injector for the
MR. The MLF requires wide and uniform transverse
beam distribution on the neutron production target to
reduce the damage to the target, on the other hand, theMR requires narrow one because the apertures of thebeam transport line and the ring are limited. Since difference phase space painting at injection for each beam

Accelerators

J-PARC Annual Report 20128
can meet the requirements, two pulse steering magnets
were installed in the transport line from the linac to the
RCS. In order to obtain relatively smaller transverse
emittance at extraction, those magnets were designed
to perform a smaller injection painting for the MR beam
as compared to the MLF one. These two magnets
worked well and are already in operation for switching
to a painting area of 100 p mm mrad for the MR as compared to that of 150 p mm mrad for the MLF beam [1].
3) High intensity beam trial.
We have performed a high intensity beam trial of up
to 540 kW. Figure 7 shows the signal of the beam current
monitor (DCCT) and the total beam loss rate in the case ofbeam power ranging from 105 kW-equivalent to 539 kWequivalent. The beam power was controlled by the pulse
length of the injection beam from the Linac. The pulse
length was changed from 100 ms to 500 ms. The beam was
extracted from the RCS to the beam dump located at thebeam transport line to the neutron production target.
Almost no beam loss was observed from injection
to extraction in the case of less than 300 kW-equivalentbeam power, but obvious beam loss occurred when the
beam power was more than 400 kW-equivalent[2].
Figure 8 shows the beam loss monitor signal for theentire RCS in the case of 212 kW user operations and thecase of the beam power ranging from 105 kW-equivalent to 539 kW-equivalent in the high intensity beam
test. In the user operation the extracted beam from the
RCS is transported to the neutron production target, andthe beam is transported to the beam dump (called 3NBT

Number of particles / pulse [×1013]

5dump) located at the beam transport line to the neutron
production target in the case of beam test. Almost all
beam loss was localized at the ring collimator and theloss rate was about 2%; this was acceptable because thedesign value of the beam loss was 3%.
The beam loss source in the injection area is the foil
hitting by the circulating beam in the ring because thebeam loss increases linearly according to the beam power.
It was found that non-linear beam loss occurred in
the collimation area. One of the causes of this beamloss is misalignment of the main components due to theearthquake damage because beam loss did not occur inthe case of 400 kW equivalent beam power before theearthquake. Since the other cause of the loss is not clear,
we should continue to study the beams and develop abeam simulation code to find the source of the beam loss.
We estimated the activation in the case of the 540
kW beam power user operation from data of 200 kW
operation and summarized it in Table 1. The activation
is estimated to be 1.5 mSv/h in the collimator and theinjection area, which is an acceptable value to performthe user operation. This 540 kW beam power corresponds to 1.6 MW for 400 MeV injection in terms of theLasslett tune shift. This high-intensity trial showed thesignificant progress we reached in designing an output
beam power of 1 MW.
References[1] P. Saha et al., Proceedings of IPAC13, MOPME022.
[2] H. Hotchi, Proceedings of IPAC13, THPWO033.

539 kW ; Total loss rate ~2%4.5
4432 kW ; Total loss rate ~1%

3.5
3324 kW ; Total loss rate <0.5%

2.5

214 kW ; Total loss rate <0.5%2
1.5

105 kW ; Total loss rate <0.5%

1
0.5
0
-5

0

5

10

15

20

25

Time [ms]Fig. 7. Signal of the beam current monitor (DCCT) in the case of increasing the beam power from105 kW equivalent to 539 kW equivalent.

J-PARC Annual Report 2012

Accelerators

9

Fig. 8. B eam loss monitor signal for the entire RCS in the case of 212 kW user operations and for the case of increasing
the beam power from 105 kW-equivalent to 539 kW-equivalent in the high intensity beam test.
Table 1. Measurement values of activation on the surface of the beam pipe 4 hours
after the beam stop in the case of a 3-week long 212 kW user operation, andthe estimated activation in the case of a 540 kW operation.

Power
[kW]
212
540

Colli.
<250<1500

Activation [µSv/h]
Arc2
Arc3
Inj.
<4
<5
<550
(measurement)
<125
<10
<12.5
<1375
(estimation form 212 kW operation)
Arc1
<50

dump
<70
<175

MR
Figure 9 shows the operation history of the MR from
April 2010 to March 2013, the end of FY 2012. For the FX
mode, beam delivery to the T2K experiment, the beam
power was increased by shortening the acceleration
cycle time and by increasing the number of extracted
particles per pulse. The shortening of the cycle time
was achieved by improvements to the main magnet
power supplies and installation of additional rf systems
to attain a higher accelerating power. The number ofthe rf systems was five until June 2010. A 6th system
was installed during the 2010 shutdown, the 7th and 8th
during the 2011 shutdown and finally the 9th during the2012 shutdown. For the SX mode, the beam delivery to

the hadron experimental hall, the cycle time is fixed at 6s. The beam power was gradually increased by performing accelerator study to achieve a high extraction efficiency and good time structure of the extracted beam
intensity.
The beam power delivered to the T2K experiment
was limited in the operation between March and June2012 for the following reasons:(1) A large beam loss in the injection timing wasobserved. The loss was caused by deterioration of theinjection kicker performance due to a discharge problemof the impedance matching resistors. A new injection

Accelerators

J-PARC Annual Report 201210
kicker system was installed in the shutdown period after
the earthquake. The discharge problem was found after
a two-month routine operation. The cause of the discharge in the matched resistors was poor electric contact
between the aluminum electrode and the ceramic resistor. It was indicated by a gradual increase of the resistance during operation. An improved resistor—a Cu ringinserted between the ceramics and the electrode—has alonger lifetime of more than 4 months. These improved
resistors have been adopted in the operation since June2012 and damaged resistors are replaced on scheduled
maintenance days before performance deterioration.
(2) From the end of May 2012, the beam intensity
was limited to lower than 160 kW in order to keep theradioactive level lower than the critical value for theexhaust gas at machine building No. 3. In the MR, there
are three machine buildings. Each of them has air conditioning system for the tunnels, chiller, and pumping
system for water cooling of the magnet. The amountof radioactivity in the exhaust gas is strictly regulated. In the operation with beam power of 180 kW,
the instantaneous radioactive level in the exhaust gasof machine building No. 3 increased and closed at thelegally accepted value of 0.5 mBq/cc, it is defined as theaveraged value of three months. It meant that radioactive air from the accelerator tunnel was leaked into themachine building. For this reason, the beam power was
kept below 160 kW. A close examination of the machinebuilding revealed that the dampers of the air circulating
system were not sufficiently airtight. During the summer shutdown period, the dampers were replaced by
new ones with a better seal. As a result of this change,
the radioactive level in the exhaust gas under 200 kW
beam operation decreased from approximately 1.0
mBq/cc to 0.1 mBq/cc.
Several scheduled improvements of the MR were
performed during the 2012 summer shutdown period
as follows:(1) The capacity of the ring collimator was increased
from 0.45 kW to 2 kW by installing an additional set ofcollimators and local shields.
(2) The 9th RF cavity was installed in the ring. It canbe operated also as a second harmonic system to reduce
the space charge effect of the beam bunch.
(3) A transverse 100-MHz rf system was installed
to improve the duty factor of the SX mode. Figure 10
shows the newly installed strip-line kickers for the rf system. In order to suppress the vacuum pressure rise dueto the multipactoring effect in the strip-line kicker, 12

sets of solenoid coils were installed on the beam duct of
the strip-line kicker.
After the summer shutdown period, the delivered
beam power to the T2K experiment was gradually
increased as shown in Fig. 9. The maximum beam power
reached 240 kW in March 2013.
For the SX mode, the operation with 15-kW delivered beam power started from December 2012. The
extraction efficiency for the 15 kW operation is kept at~95%, the same as the efficiency for the 6 kW beam
operation, using the dynamic bump scheme.
The most serious issue to be solved in the SX operation is a spike-like time structure in the extracted beam.
The structure is brought by fluctuation of the betatrontune, which is caused by current ripples of ΔI/I ≈ 10–4 forthe main magnet power supplies. In order to improve
the time structure, a transverse 50-MHz rf system has
been adopted since February 2012. The transverse rf
system improves the duty factor, an index to evaluate
the quality of the time structure of the extracted beam,from ~17% to 30% as reported in the last annual report.
In the SX operation after the summer shutdown, theadditionally installed new transverse rf system, which
can cover the higher frequency of up to 100 MHz was
switched on. Figure 11 shows a typical time structure of
the extracted beam intensity (beam spill) and the circulating beam current for beam intensity of 15 kW with the
new transverse rf system. The extracted beam intensity
was measured by a photomultiplier with a plastic scintillator placed in the beam transport line to the hadronexperimental hall. The duty factor with the new transverse rf system was improved by up to ~44% in the user
operation.
The challenge to be met soon is improving the manner of the beam loss handling in the MR.
The following are potential corrections for the beamloss issue:(1) The loss power capacity will be increased from 2
kW to 3.5 kW by installing additional sets of collimatorsand iron shields.
(2) Parts of the beam ducts made of stainless steel
will be replaced with titanium ducts to reduce the residual radiation dose. Similarly, both of the two electrostatic septa will be replaced with new ones, which havevacuum chambers made of titanium.
(3) The injection kicker system will be improved tomake the rise time shorter. Moreover, a small kicker system will be installed to compensate for the extra kicks

J-PARC Annual Report 2012

Accelerators

11
made by the injection kicker system (the extra kicks bend
the orbit of the previously injected beam bunches).
(4) In order to increase the beam power, the increment of the repetition cycle of the main magnet was

250

FX
3.52 scycle

Shutdown

S
X

FX
3.2 s
3.04 scontinuously examined. A voltage control scheme ofthe deceleration period will be installed into the control
system of the magnet power supplies in order to reduce
the period from 2.48 s to 2.40 s.

Shutdown after
the earthquake

F S
X X

FX
2.56 s

Shutdown

FX
2.48
s

S
X

F
X

Beam power [kW]3.52 s cycle

200
150
100
50
0
Mar/2010

Jan/2011

Oct/2012

May/2012

Fig. 9. History of delivered beam power as of the end of March 2013.

Fig. 10. Strip-line kickers of the new 100-MHz transverse rf system.

Jan/2013

Accelerators

J-PARC Annual Report 2012

12

Fig. 11. Extracted beam spill signal (blue) and circulating beam current (green) for the SX
operation with 15 kW beam power.

Materials and Life Science
Experimental Facility

Materials and Life Science Experimental Facility

J-PARC Annual Report 201214

Overview
After recovering from the damage of the Great East
Japan Earthquake of March 2011, the user program ofMaterial and Life Science Experimental Facility (MLF)
was restarted in January 2012. The very stable operation with 200 kW proton beam power continued until
the summer shutdown. In October, the operation
resumed and we achieved 534 kW as the maximum
beam power in the commissioning, although just for ashort time due to the license regulation. After this test,
the 350 kW operation (nominal beam power: 300 kW)
successfully continued until May 2013, when an accident occurred at the Hadron Facility.
Although the delivery of the bubbling system tomitigate pitting damages in the target container wasdelayed for half a year, we were able to install it in the
Hg loop and started operation in November, whichenabled us to ramp up the accelerator power to 350
kW. The mitigation effect was clearly observed by alaser Doppler vibrometer. However, we had a trouble
due to unexpected intrusion of Hg into the branchingHe pipes. This problem will be solved by improving thepiping system.
Four new beam lines joined the user program.
Those are BL02 (DNA), BL15 (TAIKAN), BL17 (SHARAKU)
and BL18 (SENJU). All of them are constructed andoperated under the legislation regulating the user promotion program. BL06 (VIN ROSE), BL22 (ERNIS) and
BL23 (POLANO) are under construction. A new beam
port of muon, U-line, was also funded by a grant and its
construction started.
The numbers of users at MLF in fiscal year 2012 hit arecord high (735 for neutron and 72 for muon).
The numbers of submitted/ approved proposals
gradually increased and those for the 2012A and 2012B
rounds were 253/225 and 349/235, respectively.
Although the start of the direct user support activities of CROSS-Tokai was delayed by about 10 months
due to the earthquake, the CROSS-Tokai engaged in its
core business of managing the proposal selection process for the Public Beamlines (5 instruments in 2012),
delivering high-quality user support and promoting
utilization.

Table 1. Beam statistics for the MLF user program in Japan fiscal year 2012.

No. ofrun cycle

Nominal beam
power (kw)

Duration

Scheduled time(*)(h)

Availability

#42

210

00am on 04/01/2012 – 07am on 05/25/2012

1147

81.6%

#43

210

09am on 05/29/2012 - 09am on 07/02/2012

777

96.4%

#44

210

09pm on 10/18/2012 - 09am on 11/12/2012

516

94.1%

#45

210, 28009pm on 11/21/2012 - 06am on 12/27/2012

801

92.8%

#46

300

09am on 01/13/2013 - 07am on 02/22/2013

886

93.8%

#47

300

09pm on 02/25/2013 - 09pm on 03/26/2013

636

94.5%

(*) Note: The scheduled time excludes the duration allocated for the purpose of beam study for the 3-GeV proton beam transport line and/or
the mercury target in MLF.

J-PARC Annual Report 2012Materials and Life Science Experimental Facility

15

Neutron Instruments
BL
BL01
BL02
BL03
BL04
BL05
BL06
BL08
BL09
BL10
BL11
BL12
BL14
BL15
BL16
BL17
BL18
BL19
BL20
BL21
BL22
BL23

Name of Instruments
4SEASONS: 4D-Space Access Neutron Spectrometer
DNA: Biomolecular Dynamics SpectrometeriBIX: IBARAKI Biological Crystal Diffractometer
ANNRI: Accurate Neutron-Nucleus Reaction measurement Instrument
NOP: Neutron Optics and Fundamental Physics
VIN ROSE: VIllage of Neutron ResOnance Spin Echo spectrometers
S-HRPD: Super High Resolution Powder Diffractometer
SPICA: Special Environment Neutron Powder Diffractometer
NOBORU: NeutrOn Beam-line for Observation & Research Use
PLANET: High Pressure Neutron Diffractometer
HRC: High Resolution Chopper Spectrometer
AMATERAS: Cold-Neutron Disk-Chopper Spectrometer
TAIKAN: Small and Wide Angle Neutron Scattering Instrument
SOFIA: Soft Interface Analyzer
SHARAKU: Polarized Neutron Reflectometer
SENJU: Extreme Environment Single Crystal Neutron Diffractometer
TAKUMI: Engineering Materials Diffractometer
iMATERIA: IBARAKI Materials Design Diffractometer
NOVA: High Intensity Total Diffractometer
ERNIS: Energy Resolved Neutron Imaging System
POLANO: Polarization Analysis Neutron Spectrometer

Moderator
Coupled
Coupled
Coupled
Coupled
Coupled
Coupled
Poisoned
Poisoned
Decoupled
Decoupled
Decoupled
Coupled
Coupled
Coupled
Coupled
Poisoned
Poisoned
Poisoned
Decoupled
Decoupled
Decoupled

Statusin useIn usein usein usein useunder constructionin usecommissioning
in usein usein usein usein usein usein usein usein usein usein useunder construction
under construction

Muon Instruments
BL
D1
D2
U Line
S LineName of Instruments
D1 Instrument
D2 Instrument

Statusin usein useunder construction
under construction

Fig. 1. Status of the neutron and muon instruments at the MLF as of March, 2013.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201216

Neutron Source
Progress of the 3-GeV proton beam transport facility
The fabrication of two octapole magnets was completed and they were delivered to MLF (Fig.2). Thosemagnets will reduce the current peak density of theincident proton beam with Gaussian distribution profile
by about 30% and make the profile flatter. This ‘beamflattering’ system will be installed in the summer of2013 to ease the pitting damage on the mercury target
vessel. We developed an automatic beam collection
system which is useful for fine beam tuning to prevent
serious damage to the beam line components causedby beam loss. We also developed an automatically controlled beam position compensation system based on
the EPICS to correct the beam position in vertical direction at the mercury target, because the position waschanged by the magnetic field leak from the solenoid
magnet installed at a new secondary muon beam line.
Thanks to the present system, the beam position at the
mercury target became more stable. In April 2013, we
succeeded to deliver a high power beam of 0.5 MW to
the neutron production mercury target for a demonstration of the accelerator performance. The intensityof the proton beam per pulse was 20 kJ/pulse, which
exceeded the intensity of the beam provided with apower of 1 MW at SNS of ORNL.

Fig. 2. Octapole magnet for beam flattening at
the mercury target.

Success in mitigating pressure wave in the mercury target by injecting gas microbubbles
The injection of helium-gas micro-bubbles into
cess enabled us to increase the power of the incident
the mercury target vessel started in November 2012;
proton beam up to 300 kW for the MLF user program.
in this process helium gas flows from the upper spaceof the surge tank towards the swirl type bubbler in thetarget vessel through a compressor of a gas supplying device, as
Bubbler
Hg target
shown in Fig. 3. The vibration of
the target vessel induced by theTarget trolleypressure wave was monitored bya novel in-situ diagnostic systemkusing laser Doppler vibrometer
tan
s
e
a
g
g
(LDV) from the top of the shielding
r
su
He
m
plug above the mercury target. Asofrshown in Fig. 4, it was confirmedthat the displacement velocity
Surge tank
was certainly mitigated to about
one-third by the micro-bubble
Hg pump (PM pump)
Swirler
Venturiinjection for the 310 kW proton
Heat exchanger
incidence. This is the first result in
Gas supply system (GSS)
the world proving the mitigation
effect of gas micro-bubbles on
Fig. 3. Illustration of the mercury circulation system. Pictures of the swirl bubbler
are also depicted.
running mercury target. This suc-

J-PARC Annual Report 2012Materials and Life Science Experimental Facility

Displacement velocity, v (m/s)

17

0.5
0.4

310kWeq. 2.8J/cc/pulse

0.3
0.2
0.1

w/o bubble

0-0.1

w/ bubble

-0.2
-0.3

0

2

4
6
Time (ms)810Fig. 4. Displacement velocity of the mercury target vessel
measured with Laser Doppler Vibrometer for the 310
kW proton beam injection with a power density of 2.8J/
cc/pulse. Blue and red lines represent the data without
and with micro-bubbles injection, respectively.

Fig. 5. Analysis of hydrogen gas collected in a glass-cell witha laser Raman spectroscopy.

Verification of 100% para-hydrogen concentration in the moderator system during
the operating period

400
200
0
1.55

70
Pressure

1.50

60

44 kPaAccumulator level

1.45
5000

Accumulator
Level (mm)Proton beam
power (kW)Pressure (MPa)When a 1-MW proton beam is injected onto the target, a huge heat load of 3.75 kW is imposed stepwise
upon the hydrogen loop. A heater and an accumulator are equipped in the cryogenic hydrogen loop to
mitigate a pressure fluctuation below 0.1 MPa causedby this stepwise heat load and keep the feed hydrogentemperature constant. In 2012, we confirmed that thisfunction was definitely activated at beam power of 300
kW and 532 kW. For the 532 kW case, a temperaturerise of 1.3 K occurred at the outlet of the moderators.
The pressure fluctuation was mitigated to the predictedlevel of 44 kPa, with controlling the feed hydrogen temperature constant, although it temporarily increased by
0.08 K. The present result indicates that the cryogenichydrogen system would be operated stably for the 1
MW proton beam operation.

600

Heaterpower (W)

Progress of the cryogenic hydrogensystemthe hydrogen loop after a moderator and sampled gaseous hydrogen through two buffers connected to thesampling line in series to reduce the pressure from 1.5
MPa down to ca. 0.03 MPa. We collected hydrogen intoquarts-glass-cells at the end of the buffer line during an
operations period with a proton beam power of 300 kW
and after the operations ended, respectively. As a resultof analyses with a laser Raman spectroscopy (see Fig. 5),
it was confirmed that the para-hydrogen fraction was
kept 100% as designed.

50

4000
1.9 kW
3000
2000

Temperature (K)The supercritical hydrogen moderators of J-PARC
were optimized to provide a high-intensity neutron
beam, good pulse shape with narrow width, and fast
decay (short tail) by using 100% para-hydrogen. The
intensity and the pulse tail of neutrons emitted froma moderator are very sensitive to the fraction of parahydrogen. It is of interest to measure the para-hydrogen
fraction in the cryogenic hydrogen loop because suchmeasurement has never been done at large scale spallation neutron source yet. We added a sampling line to

19.0

1.3 K

Outlet of the moderators

18.0
17.0

0.08 K

Feed hydrogen to the moderators

16.0
0

100

200
Time (s)300400Fig. 6. Dynamic behaviors of cryogenic hydrogen loop forthe 532-kW proton beam incidence.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201218

Neutron Science
Switching of intra-orbital spin excitations in electron-doped iron pnictide superconductors (S. Iimura et al.)The iron pnictide superconductor LaFeAsO 1−xHxshows a unique phase diagram in Fig. 7. In addition to
the ﬁrst superconducting dome with the optimal criticaltemperature (Tc) of 29 K adjacent to the AFM phase, thesecond dome with an optimal Tc of 36 K is broadly spreadaround x ∼ 0.35; a T-linear resistivity, often referred to as thenon-Fermi-liquid state, is observed above the Tc. According to previous theoretical calculations, the developmentof the spin density wave (SDW)-type spin ﬂuctuations isunlikely in such heavy electron-doping conditions x > 0.3
due to the change of the Fermi surface (FS), whereas theobserved T-linear resistivity implies the crucial relation
between the spin fluctuations and the second dome.

Figures 8 (a), (b) and (c) show the doping dependency of the INS intensity from LaFeAsO1−xDx with x =0.1, 0.2, and 0.4 at 7 K as a function of momentum transfer (Q) at several ﬁxed energy transfers (E). For composition x = 0.1 [Fig. 8(a)], a peak is observed at Q = 1.14 Å−1and in 10 < E < 17 meV. The Q value is very close to thewave vector for the two-dimensional stripe-type AFM
order in the parent phase Q2DAFM = (1 0 0) ∼ 1.1 Å−1 inorthorhombic notation, indicating ﬂuctuations of theSDW. For x = 0.2, the magnetic peak completely disappears [Fig. 8(b)]. As x increased to 0.4 [Fig. 8(c)], a peak
appears again at Q = 1.25–1.38 Å−1 in 16 < E < 22 meV.
Figure 9 shows the calculated spin susceptibility based on the RPA applied to a ﬁve-orbital model of
LaFeAsO1−xHx that was derived from the band calculation using VCA for the doping effect. The calculated χs
at x = 0.08 and 0.40 have a peak at Q = (π, 0) ∼ 1.1 Å−1 and(π, 0.35π) ∼ 1.2 Å−1, respectively, which agree well withthe experimental values. The FS analysis shows that theorigins of the two χs peaks are different; the former isderived from the nesting within Fe-3dYZ, ZX, whereas thelatter is due to the nesting within Fe-3dX2-Y2, indicating
the switching of the two intra-orbital nestings within
the 3dYZ, ZX and 3dX2-Y2 by electron doping. These experimental ﬁndings and calculations imply that the orbital
multiplicity plays an important role in the doping and/or material dependence of the Tc of the iron pnictides.

Pauli-paramag.
Temperature

Ortho.

Tetra.

Non-Fermi liquid

AFM

SC-2
SC-1
0.0

0.1

0.2

0.3

0.4

0.5

x

Fig. 7. Schematic phase diagram of LaFeAsO1−xHx.

Thus, we performed inelastic-neutron-scattering(INS) measurements to investigate the dynamic spinstates of LaFeAsO1−xDx with x = 0.1, 0.2, and 0.4 corresponding to the top of the ﬁrst dome, the Tc valley, andthe top of the second dome, respectively. For the sample compositions x = 0.1, 0.2, and 0.4, the Tc’s were 27,
14, and 34 K, respectively. Several INS measurements
were performed using the Fermi chopper spectrometer
4SEASONS in J-PARC. All data presented here were obtained at incident energy of 45.1 meV.

Intensity (arb. unit)

(a)

(b)
4 π

x = 0.08
π

0.40
16

3
Xs

8

2
0
0

π

1 0
0

π

22.5 meV

4

(c)

6

22.5 meV553
E = 10.5 meV
44

E = 9 meV

2
1.0

1.5

2.0

0.5

0

Fig. 9. C ontour plot of the spin susceptibility for (a) x = 0.08
and (b) 0.40.

(b)

18 meV

6

(a)

1.0

1.5

2.0

E = 15 meV
1.0

1.5

Q (Å-1)
Fig. 8. Constant E-scans of LaFeAsO1−xDx with (a) x = 0.1, (b) 0.2, and (c) 0.4 at T = 7 K.

2.0

J-PARC Annual Report 2012Materials and Life Science Experimental Facility

19

Neutron Brillouin Scattering Experiments on HRC (S. Itoh et al.)Nd2Fe14B is a well-known strong permanent magnet with TC = 580 K. At room temperature, all spins arealigned along the c*-axis. We measured spin waves ina Nd2Fe1411B polycrystalline sample at 300 K with Ei =257 meV and DE = 5.7 meV. The spin wave peak positions were determined in Fig. 11. The observed peak
positions were on the dispersion curve along the c*-axis
reported in the previous experiment.
15
Nd2Fe1411B

10

E (meV)On the High Resolution Chopper Spectrometer(HRC at BL12), the neutron Brillouin scattering (NBS)
experiments became feasible by reducing the background noise at low angles down to φ = 0.5°. NBS is
the most promising way to observe excitations in theforward direction from powders, polycrystals, or liquids.
Owing to the kinematical constraints of neutron spectroscopy, incident neutron energy (Ei) in sub-eV region
with high resolution (DE/Ei) at low scattering angles (φ )is necessary for measuring scattering in the meV transferred energy (E) range near (000).
First, NBS experiment was performed to observe
spin waves in a polycrystalline sample of a nearly-cubic
perovskite, La0.8Sr0.2MnO3, (Curie temperature: TC = 316K), whose magnetic properties are well elucidated. Figure 10 shows the dispersion relation of spin waves in
La0.8Sr0.2MnO3 measured with Ei = 102 meV and DE = 2
meV. The observed dispersion relations at 6 and 245
K were well fitted to E = DQ2, where Q is the scatteringvector. The obtained D values were 130 ± 13 and 88 ± 2
meVÅ2 at 6 and 245 K, respectively. These values are ingood agreement with the results (D = 131 and 89 meVÅ2
at 14 and 250 K, respectively) obtained by the previous
experiments using a single crystal. That demonstrated
the feasibility of NBS experiments on the HRC.
Next, the spin waves in a polycrystalline ferromagnet, SrRuO3 (TC = 165 K), were similarly measured. This
material also has a nearly-cubic perovskite structure
showing an anomalous Hall effect, but a large single
crystal suitable for inelastic neutron scattering experiments has not yet been synthesized. The measurement
was performed at 7 K with Ei = 102 meV, and well-defined
spin wave peaks were observed. As shown in Fig. 10, thedispersion relation of spin waves in SrRuO3 was well fitted to E = E0 + DQ2 with an apparent energy gap E0.

0.2-1
Q (Å )

0.3

0.4

Fig. 11. S pin wave dispersion relation of Nd2Fe1411B. The solidline is the dispersion curve along the c-axis determined using a single crystal sample.

Phononic excitations in a liquid D2O were measured
at 300 K with Ei = 102 meV and DE = 2.0 meV. The observed spectra were well fitted with a damped harmonic oscillator scattering function and the peak positions
were determined, as shown in Fig. 12. The observed
peak positions down to Q = 0.02 Å-1 were well fitted to E
= cQ with c = 21.4 ± 0.2 meVÅ, which is equivalent to c
= 3250 ±30 m/s. The observed sound velocity c was ingood agreement with that for the fast sound observedin the previous experiment with Ei = 80 meV and DE =4.8 meV down to Q = 0.035 Å-1.

SrRuO3 T= 7 K
La0.8Sr0.2MnO3 T = 6 K
La0.8Sr0.2MnO3 T = 245 K

D2O

15

E (meV)E (meV)

0.1

20

6
4

T = 300 K

10
5

2
0
0.0

5

0
0.0

10
8

T = 300 K

0.1

0.2

-1

0.3

0.4

Q (Å )

Fig. 10. Spin-wave dispersion curves for La0.8Sr0.2MnO3 andSrRuO3 determined on the HRC. The solid lines are
fitted curves. The dashed line is the upper boundary
accessible with a conventional spectrometer.

0
0.0

0.2

0.4
-1
Q (Å )

0.6

Fig. 12. D ispersion relation for phononic excitations, the fastsound, in D2O (closed circles). The open circles areprevious results. The solid line is a fitted line.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201220

Investigation of Degradation Mechanism of ITER CS Conductor Sample using TAKUMI (T. Hemmi et al.)
φ32.6

JK2LB Jacket
䕕49Superconducting cable
Central Spiral
Cable wrapping
Sub-cable wrapping

Fig. 13. S chematics of ITER CS conductor.

7.0
Tcs (K)

ITER was constructed in France under an international collaboration with India, China, EU, Korea, Russia,
USA and Japan to prove the viability of nuclear fusion
as a power source. To confine and control the plasma,
the ITER magnet system consists of a Central Solenoid(CS), 18 Toroidal Field (TF) coils and 6 Poloidal Field (PF)coils. The CS, which is 13.5 m in height and 4.1 m indiameter, generates and controls the plasma current byvarying the magnetic field as a maximum of 13 T. JAEA
has to responsibly procure all ITER CS conductors. The
CS conductor is a cable-in-conduit conductor (CICC)
composed of a superconducting cable consisting of
576 Nb3Sn strands and 288 copper strands, a SS316L
central spiral and a JK2LB stainless steel square jacket
as shown in Fig 13. After the operation of 60,000 cycles,
a current sharing temperature (Tcs) of 5.2 K is required
at currents of 40 kA under the magnetic fields of 13 T.
Several conductor samples were fabricated to evaluate the performance of the CS conductor and validate
its design concept. Two CS conductor samples named
CSJA01 and CSJA02, consisting of a pair of conductor
samples, were tested in the SULTAN test facility in Switzerland. The gradual degradation was observed in the
results for both CSJA01 and CSJA02, being the same asthat of many TF conductors as shown in Fig. 14.
Up to now, the transverse electromagnetic loading
has been considered as a major origin of Tcs degradations of Nb3Sn CICCs due to the local bending at thehigh loading side (HLS) in the high field zone (HFZ).
From the destructive investigation in the HFZ after SULTAN testing, the deflection of strands on the low transverse loading side (LLS) is larger than that for the HLS
as shown in Fig.15. Since the bending pith is around
5 mm due to contacting of strands compacted by theelectromagnetic transverse loading in the HLS, there is

6.0

5.0
0

CSJA02 L

CSJA01 R
Warm-up/Cool-down CSJA02 R

CSJA01 L

2000 4000 6000 8000 10000
Number of cycles

Fig. 14. T cs result of CSJA01 and CSJA02.

a possibility of large bending strain with small deflection of strands in the HLS.
The neutrons, which have a large penetration
depth, are a powerful tool to evaluate the internal strainof Nb3Sn in the CICC. In order to evaluate the internalstrain in ITER CS conductor samples non-destructively
and quantitatively, a neutron diffraction measurement
using the engineering materials diffractometer ‘TAKUMI’ (BL19) was carried out on the CSJA01 left leg atroom temperature.

HLS
Electromagnetic loading

HLS

LLS
Strandbending
direction

LLS
45 mm

Large void

Fig. 15. Visually inspected cable in the HFZ of CSJA01 right leg.

J-PARC Annual Report 2012Materials and Life Science Experimental Facility

21

1.2

Intensity (a.u.)

1.0

Nb3Sn (211) Axial

0.8

LFZ(1150mm)

0.6

Field center, LLS

0.4

Field center, HLS

Nb3Sn filaments

0.2
0.0
-0.2

The shorter twisting pitch (STP) could be considered as a method to improve the conductor performance on the strand buckling. The cable with the STP
has withstood the strand buckling since its bending
stiffness and rigidity are quite significant. Figure 17
shows photographs of the cables with original twisting
pitch and STP. The result of the SULTAN testing of the
conductor sample with STP found it to be very effective,
and the performance degradation along cyclic testing
was almost negligible as shown in Fig. 18.

Original

STP

Fig. 17. P
 hotograph of the cable with original twisting pitch
and STP.
STP
Current sharing temperature (K)For the neutron diffraction measurement using
TAKUMI, a conductor sample of 3.6 m was arranged.
The neutron beam was focused using a pair of radialcollimators to the gauge volume of 7 x 2 x 16 mm3 inthe measured position of the conductor sample. The
sample conductor was turned over to measure if the
LLS and the HLS have the same path as the neutron
beam. Figure 16 shows the diffraction profiles for theaxial direction of Nb3Sn (211) at the LLS and the HLS of
the field center and 1150 mm from the field center. The
Nb3Sn filaments were taken from the same strand using
a chemical process to compare the diffraction profileof the conductor sample. The diffraction peak shapes
and positions at the HLS in the HFZ and the low fieldzone (LFZ) were similar, and the peaks were located ata lower level than that of Nb3Sn filaments. This peakshift is due to the difference in the thermal contraction between copper/Nb3Sn filament and cable/jacket
from the reaction temperature of Nb3Sn. However, thepeak of the LLS in the HFZ shifted to a tensile direction
and became broader compared to the other peak. The
bending strain with the relaxation of the compression
strain in the Nb3Sn strand remained irreversible after
the SULTAN testing.

CSJA05R

7.0
CSJA02 R
CSJA01 R

6.0

0.214

0.216

0.218

0.220

Lattice spacing (nm)Fig. 16. Differences in diffraction profile.

After the neutron diffraction measurement, a larger
bending strain was found at the LLS of the HFZ in the
conductor sample. As a degradation mechanism, thestrand buckling is seen as follows: 1) The void at the LLSof the HLS is generated by the transverse movementof the strands in the conductor sample. 2) There is anaxial compressive force induced by the difference in thethermal contraction from the reaction temperature of
Nb3Sn. 3) The buckling of the Nb3Sn strand is occurring
via the axial compressive force because the supporting and the friction of the jacket and the cable on thestrand are varied by the large void.

CSJA02 L
Warm-up/Cool-down

CSJA01 L

5.0

Original0

0.212

CSJA05L

CSJA03L,R

2000

4000 6000 8000
Number of cycles

10000

Fig. 18. Tcs results of SULTAN testing.

Neutron diffraction measurement on the ITER CS
conductor sample was performed to investigate thedegradation mechanism of the conductor sample. As
a result of the neutron diffraction measurement, large
bending at the LLS of the HFZ was found. Therefore,
it was concluded that the Tcs degraded position of the
conductor sample due to the cyclic loading was the
LLS of the HFZ. The large bending originated from thestrand buckling due to the large void generated by thetransverse electromagnetic loading and the thermallyinduced residual compressive strain. By applying the
STP on the cable to control the strand buckling, theproblem of the performance degradation along cyclic
testing was solved.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201222

Muon Science
At MUSE, we had a steady operation at the D-line
in the fiscal year of 2012. At the U-line, we managed
to install new axial focusing muon beamline components, to extract intense surface muons dedicated for

ultra slow muon production. Also, we completed theinstallation of front-end magnets in the vicinity of themuon target during a shut-down period in the summerof 2012 under an intense radiation field.

D-line operation
Consequently, we managed to operate users’ runat the D-line with proton intensity of up to 300 kW. We
installed a switch yard, a kicker and septum magnets
to allow a single bunched muon beam up to 60 MeV/c
towards D1 and D2 areas in the D-line. Everythingworked successfully, delivering a single pulse towards

the D1 area, with negligibly small S/N ratio appeared inthe μSR spectrum. At the D1-area, a dilution refrigerator which had been used at KEK-Tsukuba, was brought
to MUSE, fixed and installed, enabling us to perform
μSR measurements as low as 25 mK.

Installation of the U-line
We were funded to install a second muon beamline, the so called U-line, which consists of a large acceptance solenoid made of mineral insulation cables (MIC),
a superconducting curved transport solenoid magnet
and a superconducting axial focusing magnets system. There, we can collect surface muons with a large
acceptance of 400 mSr. Compared to the conventional
beamlines such as the D-line, the large acceptance ofthe front-end solenoid allows us to capture 10 times
more intensity pulsed surface muons of 5×108 /s, when
the proton beam intensity reaches 1 MW. The U-line
components of the superconducting curved and axial
focusing magnets were already fabricated and theircommissioning was performed in October, 2012. Figure 19 (Left) shows a picture of the celebration of thedelivery of the superconducting curved transport solenoid magnet. Figure 19 (Right) shows a picture of thesuperconducting axial focusing magnets associatedwith three sets of ±400 kV DC separators.
In the commissioning works, we succeeded in
extracting the world’s highest intensity pulsed muons,
2,500,000 muons per pulse (6.4×107 /s at 212 kW, corresponding to 3×108 /s at 1 MW) to the U1 experimental area. This intensity achieved at the U-line exceeds
the previous intensities, 72,000 muons per pulse (120kW) and 180,000 muons per pulse (300 kW), whichwere achieved at the D-line of this facility in 2010,
respectively. It means that for the first time globally weachieved the world’s strongest pulsed muon intensity.
The achieved intensity not only shortens the measurement time to one-twentieth compared with the present measurement, but it also may open a new era tocapture novel information that could not be recognized
before. According to the simulation, we could extract
2×108 /s surface muons (at the 1 MW operation) tothe experimental area, with an approximate transport

Fig. 19.	(Left) The celebration of the delivery of the superconducting curved transport solenoid magnet. (Right) The superconducting axial focusing magnets associated with three sets of ±400 kV DC separators.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201223
efficiency of 40%. It demonstrates that the beam line
design concept adopting axial focusing extraction for
the first time is working very well. Figure 20 shows alifetime spectrum of the surface muons extracted to the
U1 area on Al target, showing 2-bunched structure of
the surface muons and electrons. It demonstrated thatvery intense surface muons as much as 6.4×107/s @212
kW were extracted to the U1 shielding area, which was
20 times stronger than the D-line.
As a next step, we are planning to stop such intense
pulsed muons towards a hot tungsten target for generating intense ultra-slow muon beams in order to realize“ultra-slow muon microscopes”. When the productionof an intense ultra-slow muon source is realized, the useof its short-range penetration depth (eg. 1 nm resolution at a penetration of 1 nm, and 10 nm at a penetration of 6 nm in gold) will allow the muon science toexpand into a variety of new scientific fields, such as:1) Surface/boundary magnetism utilizing its spinpolarization and unique time-window.
2) Surface chemistry, utilizing a feature of a light isotope of hydrogen, such as catalysis reactions.
3) Precise atomic physics such as QED,
4) Ion sources towards possible μ+μ- collider experiments in high-energy physics.

U-Line Positive Muon Mode

X 2 / ndf

82.35 / 24

Event rate [arbitary unit]

Constant
Slope

9.063 ± 0.021-4.594e+005±7.464e+003

104

103

102

-5

-4

-3

-2

-1

0

1

×10-6
Time [s]Fig. 20.	Lifetime spectrum of the surface muons extracted to the U1 area, showing
the 2-bunched structure of the surface muons and electrons. It demonstrates that surface muons as much as 6.4×107/s@212 kW were extracted to
U1 shielding area, corresponding to 20 times stronger than the D-line.

Installation of the front-end magnets for the S-line and H-line in the vicinity ofthe muon target
During a shutdown period in the summer of 2012,
we worked on the installation of front-end magnets
for the S-line, which is a surface muon beam line dedicated for the materials science with a modest-acceptance (about 50 mSr), and the H-line at which various
problems of the fundamental physics research will be
studied, for instance, the precise measurement of thehyperfine splitting of Muonium, implying the existenceof new physics laws beyond the Standard Model, or
the precise measurement of the anomalous magnetic
moment (g-2) of muons. Although the radiation levelin the vicinity of the muon target was very high to bein the order of Sv/h, we finally managed to install the
SQ4,5,6 and HS1, HS2, HS3 and HB1 associated withguide shields and pillow seals between those elements.
Figure 21 shows a picture of the installation of the HS1,

HS2, HS3 and HB1 in severe radiation environment in
the vicinity of the muon target.

Fig. 21.	A picture of the installation of the HS1, HS2, HS3 and
HB1 in the vicinity of the muon target.

Materials and Life Science Experimental Facility

J-PARC Annual Report 201224

Neutron Device
Focusing supermirrors on precisely figured elliptical surfaces (D.Yamazaki et al.)Reflective optics is one of the most useful techniques for focusing a neutron beam with a widewavelength range since there is no chromatic aberration. We
have been developing aspherical supermirror optics byusing an ion beam sputtering technique to coat highperformance supermirrors and a numerically controlled
local wet etching (NC-LWE) technique to figure aspherical mirror substrates. Previously, we fabricated a planoelliptical supermirror with a clear aperture of size of 90
x 40 mm2 by applying these techniques and obtained
a focusing gain of 6 and a reflectivity of 0.64-0.7 in thecritical-angle region for m=4. Increasing the mirror size
is essential for increasing the focusing gain. We reportfabrication result of an elliptical supermirror with large
clear aperture size and the focusing performance of theneutron beam.
We fabricated a 400-mm-long elliptical neutronfocusing supermirror by a combined fabrication process consisting of precision grinding, HF dip etching,
NC-LWE figuring, low-pressure polishing and ion beam
sputtering deposition. We succeeded in obtaining afigure error of 0.43 μm p-v with a surface roughness ofless than 0.2 nm rms.
The focusing performance of the fabricated ellip-

tical supermirror was evaluated at BL10 NOBORU. We
show a schematic of the setup for measuring the neutron beam profile in Fig. 22. A flat supermirror with
m = 4 is used to reflect the neutrons into the focusing device to reduce the background and the gamma
radiation from the direct beam. The wavelength of
the neutron beam was varied from 3.5 to 10 Å. Twodimensional images of focused and nonfocused direct
neutron beams were measured using an imaging plate(Fujifilm BAS-ND; resolution: 50 μm). The width of theslit in this experiment was 0.10 mm. The magnificationof the optical design was 1. Figure 23 (A) and (B) shows
two-dimensional images of focused and nonfocused
direct neutron beams, the neutron beam detectedusing the imaging plate. A neutron beams with a wide
wavelength range was uniformly focused on the mirror
where it had an effective width of 30 mm. The neutrons
detected beyond the mirror were due to the horizontal divergence of the neutron beam. The full width at
half maximum (FWHM) of the focused beam was 0.128
mm, and a focusing gain of 52 in terms of the peakintensity was achieved compared with the nonfocused
direct beam. At the peak intensity for a neutron beam,a wavelength range is 3.5-10 Å.

Imaging Plate

Deflected Beam
Focused Beam
Focusing mirror
Deflection mirror
Slit-1(0.10 mm)

550 mm

500 mm1050 mm
Direct Beam(A)
Fig. 22.	A schematic of the setup for measuring the neutron
focusing profile.

(B)

Fig. 23. 2-d images of the focused beam.

Particle and Nuclear Physics

Particle and Nuclear Physics

J-PARC Annual Report 201226

Hadron and Nuclear Physics
Recent research has indicated that strangenessplays a very important role in the behavior of high-density nuclear matter such as the core of a neutron star. At
such high-density, the neutron Fermi energy exceeds
the strange particle production threshold; therefore,
hyperons that contain strange quark(s) and other formsof strangeness may emerge. The recent discovery ofa neutron star with two solar masses seems to contradict the naïve picture above. However, certain behaviors of the nuclear matter, such as the density at which
strangeness emerges and the states in which strangeness exists, depend on the interactions of strange particles in such high-density nuclear matter. Thus, theknowledge of the interactions and nuclei exhibiting
strangeness (hypernuclei) becomes exceedingly important. Strangeness physics is one of the major researchsubjects at the J-PARC hadron facility. Several experiments related to these topics were carried out in 2012.
Neutron-rich Λ hypernuclei provide valuable information on Λ hyperon interaction and potential in aneutron-rich environment such as neutron-star matter.
Among these hypernuclei, 6ΛH is of particular interest. In the 6ΛH hypernucleus, an unbound 5H may bebound with an additional Λ hyperon due to an attractive Λ-nucleon interaction (glue-like role of Λ) and acoherent ΛN-ΣN coupling effect, which is expected toplay a very important role in neutron-rich matter. In
the J-PARC E10 experiment, a 6ΛH spectrum was measured using SKS spectrometer at the K1.8 beam line
through a double charge exchange (π-,K+) reaction on
6Li. Since a small cross section of ~10 nb/sr is expected
for this reaction, a high-intensity beam of 12 M/spillshould be used, in spite of its poor time structure. In
total, 1.65×1012 π- were irradiated on a 3.5 g/cm2 target.
Analysis is currently underway. In this experiment, the12C(π+,K+)12 C spectrum was also measured, for the firstΛtime at J-PARC, in order to evaluate spectrometer performance as shown in Fig.1.

Fig. 1. 12
 ΛC spectrum measured by the (π+,K+) reaction on a 3.5
g/cm2 carbon target. Missing mass resolution of ~3
MeV/c2 (FWHM) has been achieved.

Kaon bound nuclei are also objects of interest
because of their high-density nuclear matter thatexhibits strangeness. Two experiments at J-PARC are
aimed at discovering the simplest system of such kind,
K-pp. E27 searches for K-pp bound system that may be
produced through the Λ(1405) doorway in the d(π+,K+)
reaction at 1.7 GeV/c. Two protons are measured simultaneously in order to suppress the huge backgroundarising from the quasi-free production of Λ, Σ, and Y*.
Pilot data were taken at the K1.8 beam line, using liquid
deuterium and hydrogen targets, in order to understand the background processes in detail. The feasibility of the tagging method for one- and two-proton(s)was checked. An inclusive spectrum is shown in Fig.2.
Another experiment, E15 at the K1.8BR beam line, aims
to search for K-pp in both the production and decay
channels. The K-pp is produced via the 3He(K-,n) reaction and its decay, K-pp → Λp → p-pp, is detected by
the Cylindrical Detector System surrounding the liquid
3He target. The collection of data began in March 2013.

Fig. 2. Inclusive spectrum of d(π+,K+) at 1.7 GeV/c. The red
curve shows the data while the black one shows thesimulation spectrum of the known background processes.

J-PARC Annual Report 2012

Particle and Nuclear Physics

27

Kaon Physics
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.” Once experimentally determined, thebranching fraction for a decay mode is compared to thetheoretical predictions. Any discrepancy between theexperimental results and the theoretical predictions is a
new piece of evidence for physics beyond the Standard
Model (SM).
The decay of a long-lived neutral kaon (KL) into aneutral pi meson (π0) and pair of neutrinos, represented
as KL → π0nn is known in particle physics as a rare andprecious decay mode. New sources of symmetry breaking that can explain the matter-antimatter asymmetry
in the universe may be revealed by examining this decay mode. SM predicts that this decay mode occurs
once in forty billion KL decays. For experimentalists,
detecting this decay mode is a challenge because only
two photons from π0 decay are observable.
The J-PARC E14 KOTO experiment was proposedin 2006 to study the KL → π0nn decay. In the Hadron
Experimental Hall, a new neutral beam line was built
for KOTO in 2009 and 2716 undoped CsI crystals werestacked in 2010 for the KOTO calorimeter. The crystals
and photo- tubes were previously used in the KTeV
experiment at Fermilab, USA. After the earthquake inMarch 2011, the beam line components were realigned,
and the KOTO calorimeter was examined and confirmed
to be undamaged. The construction of the detector
resumed. In 2012, we installed charged-particle vetocounters (Fig. 3) to identify the electromagnetic showers in the calorimeter as photons, photon veto counters
to detect extra photons from KL decays, and neutron
collar counters to measure the neutrons in the beam
halo. The vacuum vessel of the KOTO detector was
closed in December 2012, and the vacuum system wasinstalled in early January 2013 (Fig. 4). After engineering runs and commissioning of the detector, the firstphysics run will be performed by the summer of 2013.

Fig. 3. Charged-particle veto counters developed and constructedby the KOTO collaborators from Kyoto University, Japan,
with the help of summer students from the University ofMichigan, USA.

Fig. 4. T he KOTO detector in January 2013 after installation of
the vacuum system.

Particle and Nuclear Physics

J-PARC Annual Report 201228

Muon Physics
Coherent Muon to Electron Transition (COMET) isan experiment to search for the muon-to-electron (μe) conversion in muonic atoms, which also violates thelepton-flavor conservation, using an intense pulsed
muon beam generated at the Japan Proton Accelerator
Research Complex (J-PARC). Together with the µ→eγ
search, the μ-e conversion mode is sensitive to more
physics cases. Thus, awareness of the search has been
expected long after the previous experiment was completed. In 2012, we started constructing an experimental facility to achieve the experimental conditions ontime. An accelerator study was required to determine
the correct beam for the experiment. The experimentgroup plans to start data acquisition to confirm the
MEG result and exceed it at an early date.
The group has also continued the R&D studies ofthe muon anomalous magnetic moment (g-2) andelectric dipole moment (EDM) measurements. We havebeen developing the muon source and acceleration, injection and storage of a high-precision magnet, and ahigh-rate silicon tracker system. The muonium production is extensively studied at the J-PARC Materials andLife Science Experimental Facility (MLF), and will soon
be extended to test the muon acceleration. In addition,
the development of a tracking detector will be continued with its first prototype currently in preparation.

Neutrino Experimental Facility
with the mixing angle between the first and third
generations, θ13, which is last unknown neutrino
mixing angle. This θ13 is the key quantity to explore CP
violation of leptons, which is one of the biggest questions of particle physics.
To achieve this objective, T2K utilizes high-intensity
muon neutrino beams with 99.5% purity. The muon
neutrino beams produced at the neutrino experimental
facility in J-PARC are directed toward the Super- Kamiokande detector (SK), which is located 295 km west of
J-PARC. SK is one of the world’s largest undergroundneutrino detectors, which contains 50,000 tons of purified water as the target for the neutrino beam. The rareinteraction between neutrinos and nuclei in the water
can be detected by the ~11,000 photo-sensors fixed
on the entire inner surface. The appearance of elec-

Neutrinos are subatomic particles with no electric charge, and have the smallest mass of all known
particles. Neutrinos come in three types, or “flavors”:
electron, muon, and tau. As they travel, neutrinos cantransform, or “oscillate”, from one flavor to another. Thisis called “neutrino oscillation”, a consequence of the factthat neutrinos have mass and thus mix with each other.
Each of the neutrino flavor states appears as a superposition of different mass states, and the difference intheir extremely small masses causes a periodic change
in flavors during flight.
The Tokai-to-Kamioka (T2K) experiment is asecond-generation long-baseline neutrino oscillation
experiment. The primary goal of the T2K experimentis the search for the muon neutrino (νμ) to electron
neutrino (νe) oscillation. Its probability is described

Delivered POT (Good Spill)
Beam power (Good Spill)

250

700
600

200

500
400

150

300

100

200

50

100
0

2010
Jul/02

2010
Dec/31

2011
Jul/02

2012
Jan/01

2012
Jul/01

2012
Dec/31

Beam power (kW)Delivered # of protons

×1018

0

Time

Fig. 5. History of the data taking of T2K from January, 2010. The red dots (see right axis) show the beam
intensity, and the blue line (left axis) shows the integrated POT.

J-PARC Annual Report 2012

Particle and Nuclear Physics

29
trons in the water, charged counterparts of the electron
neutrinos, is a clear sign of the νμ to νe oscillation.
The T2K physics experiment started in January 2010,
and continues to accumulate the data by increasing
the neutrino beam power for about 4 years. (Figure. 5)
In JFY 2012, T2K had released two new results basedon the data which was accumulated until June 2012.
The first evidence having a 3.2 σ significance for νμ toνe oscillations was obtained by T2K. Eleven νe candidates were detected using SK when it was exposed toνμ beams generated from 3.01 × 1020 protons on target(POT), while the expected number of counts from thebackground was only 3.22 ± 0.43. This results was
published in Physical Review. T2K has been awarded
a prestigious prize by La Recherche, a French sciencemagazine. This prize is called “Le Prix La Recherche”
and has 12 categories including biology, chemistry,mathematics and medicine. T2K received the physics
prize for finding the first indications of νμ to νe oscillations. T2K also precisely measured the disappearanceof muon neutrinos precisely and obtained the world’s
best estimation of the neutrino oscillation parameters.
(Figure. 6)
T2K continued to accumulate beam data in orderto obtain a firm (>5 σ significance) establishment of
the electron-neutrino appearance until May 2013.

The T2K collaboration presented the new results onνμ to νe oscillation with the improved analysis method
based on the data taken by April 2013 at international
conferences in the summer of 2013 such as the European Physical Society meeting (EPS-HEP 2013) in July.
Based on the data corresponding to 6.39×10 20 POT,
which is the doubled statistics from the previous year,
T2K observes 28 ν e candidates while the expected
number of background is 4.64±0.53. (Figure. 7) The
probability of background fluctuation to yield 28 ormore events (p-value) is 9.9×10-14 corresponding to a
7.5σ level of significance. The obtained results for θ13
value is sin22θ13 = 0.150 (+0.039 -0.040) assuming no CP
violation in neutrino oscillations and normal hierarchyof neutrino mass states. T2K has proofed the existenceof νμ to νe oscillation firmly, and achieve its first goal of
discovering νμ to νe oscillation for the first time in theworld.
The neutrino beam operation will be resumed after
the maintenance of the electromagnetic horns thatare the key component of the neutrino beam-line. T2K
will search the CP violation in neutrinos by doing the
precise measurement of the neutrino oscillation andcomparing the neutrino oscillation of neutrino andanti-neutrino.

Fig. 6. (Left) The reconstructed energy spectrum of the muon neutrinos that are generated from J-PARC and observed in SuperKamiokande. The black histogram shows the extrapolation from the neutrino beam flux measured in Tokai. The dot
shows the observed events in SK. The clear deficit due to the neutrino oscillation is appeared, and the distribution is wellmuch with the prediction by the neutrino oscillation (Blue line and Red lines) . (Right) The allowed region of the neutrino
oscillation parameters obtained by the muon neutrino disappearance by T2K (solid black line and solid led line) with theresults by other experiments. T2K gives the most precise results in JFY2012.

Particle and Nuclear Physics

J-PARC Annual Report 201230

Fig. 7. (Left) The event display of the electron neutrino candidate. (Right) Reconstructed neutrino energy spectrum of
the events, which passed all electron neutrino event selection criteria (closed circles), overlaid with the theoretical
expectation (histograms). A total 28 events was observed, which is well reproduced by assuming electron neutrino
appearance signal (red histogram) plus expected background events.

Cryogenics Section

Cryogenics Section

J-PARC Annual Report 201232

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 the operation of the superconducting magnet
system for the neutrino beamline, and support of theconstruction and operation of a superconducting solenoid magnet system for the new muon beamline at theMaterials and Life Science Experimental Facility (MLF).
It also actively conducts R&D works to back future projects in J-PARC.

Superconducting Magnet System for the T2K Beamline
The Cryogenics Section operates the superconducting magnet system for the T2K neutrino beam line. The
operation record for FY 2012 is summarized in Table 1.
The superconducting magnet system was operated con-tinuously from Sep. 2013 until May 2013 as scheduled,
except for a short shutdown during the New Year holiday.
The system had no incidents during that period and contributed to the successful results of the T2K beam line.

Table 1. Operation history of the superconducting magnet system for the J-PARC neutrino beamline.

㻞㻜㻝㻞
㻞㻜㻝㻟
㻶㼡㼘 㻭㼡㼓 㻿㼑㼜㻌 㻻㼏㼠 㻺㼛㼢 㻰㼑㼏 㻶㼍㼚 㻲㼑㼎 㻹㼍㼞 㻭㼜㼞 㻹㼍㼥 㻶㼡㼚㻻㼜㼑㼞㼍㼠㼕㼛㼚

Beam Operaon㻵㼚㼏㼕㼐㼑㼚㼠㼟No incidents

Beam OperaonSuperconducting Kaon Spectrometer (SKS)The Cryogenics Section also supports the Superconducting Kaon Spectrometer (SKS) operation at the
J-PARC Hadron Hall. Because the SKS magnet suffereddamage from the Great East Japan Earthquake, repair
was planned. The plan included replacement of themagnet stand with a new one, correction of the gaps
between the iron yoke plates and attaching a gap prevention mechanism. The moving method of the magnet was also changed from an air floating system intoa rail and wheel system. The construction of the rails
was first performed from April to May, 2013, as shownin Figure 1.

Fig.1.
Superconducting
Kaon Spectrometer
Fig.
1. TheTheSuperconducting
Kaon Spectrometer(SKS) magnet
and
the
newly
constructedrails(right).
(SKS) magnet and newly constructed rails (right).

The superconducting magnet system for the muon be
The Cryogenics Section supports construction of the intense(U-line) in the Muon Science MLF. One of the major contributions o

FY2012 is commissioning of the superconducting curved solenoid

focusing solenoids (Figure 2). The superconducting magnets were ithe summer of 2012 and commissioning to extract muon beam in theperformed in the winter of 2012.

J-PARC Annual Report 2012

Cryogenics Section

33

The Superconducting Magnet System for the Muon
Beam Line at MLF
The Cryogenics Section supports the constructionof the intense ultra-slow muon beam line (U-line) in the
Muon Science MLF. One of the major contributions of
the Cryogenics Section in FY2012 was the commissioning of the superconducting curved solenoid and thesuperconducting focusing solenoids (Figure 2). The
superconducting magnets were installed at the beamline in the summer of 2012 and commissioning to extract muon beam in the beam line was successfully performed in the winter of the same year.

Fig. 2. 
Picture of the superconducting focusing solenoids
with positron separators for the ultra-slow muon beamline at MLF.

Cryogen Supply and Technical Support
The Cryogenics Section provides liquid helium
cryogen for physics experiments in J-PARC. The liquid
helium is supplied to the users in collaboration with the
Accelerator Division using the helium liquefier ownedby the Accelerator Division. The used helium is recovered by the helium gas recovery facility, which is provided and operated by the Cryogenics Section. Figure

3 summarizes the liquid helium supply in FY 2012. The
major users of liquid helium were the SKS and the liquid hydrogen target in the Hadron Hall. The helium gas
recovery fraction was better than 90%. Liquid nitrogen
was also supplied to the users for their convenience andits amount during the period from July 2012 to May
2013 is summarized in Figure 4.

Liquid Helium Supply (L)

3500
3000
2500
2000

Neutron(MLF)

1500

Muon(MLF)

1000

Cryo.Section
Hadron

500
0
7

8

9

10

11

12

1

2

2012

3

4

5

2013

Fig. 3. Liquid helium supply at J-PARC from July 2012 to May 2013.

Liquid Nitrogen Supply (L)

4500
4000
3500
3000

Cryo.Section

2500
2000

Rad.Section

1500

MLF

1000

Hadron

500
0
7

8

9

10
2012

11

12

1

2

3

4

5

2013

Fig. 4. Liquid nitrogen supply at J-PARC from July 2012 to May 2013.

Cryogenics Section

J-PARC Annual Report 201234

R&D for the J-PARC Project: COMET
A new experiment, COherent Muon to ElectronTransition (COMET), has been proposed to search for
mu-e conversion processes using the high intensity
proton beam from the Main Ring. The Cryogenics
Section has been involved in the COMET experiment
to develop the superconducting magnet system. The
project requires a large aperture solenoid that covers
a pion production target to capture pions with large
acceptance. A major issue for the R&D is the irradiationof neutrons to the solenoid. The resistivity degradation
by neutron irradiation in aluminum and copper (stabilizer materials in the superconducting cable) has been
investigated at the Kyoto University Research Reactor
Institute, and the test was continued in FY2012. In addition, instrumentation of an R&D coil with aluminum stabilized cable was fabricated as shown in Figure 5 andshipped to the Fermi National Accelerator Laboratory

to measure its basic performance. The COMET project was partially approved in 2013 and procurement
to construct the superconducting magnets has been
started.

Fig. 5. Instrumentation work on the R&D coil of the capturesolenoid for COMET.

R&D for the Future J-PARC Project: New Muon g-2/EDM
and Muonium HFS
The g-2/EDM project using H-line of MUSE, which is
the muon beam line in MLF, was proposed by a group of
IPNS in 2009. The experiment aims for the precise measurement of the anomalous magnetic moment and theelectric dipole moment of muons. In this experiment, asuperconducting solenoid with high field homogeneity
better than 1 ppm locally is a key component to store
muons during the measurement of their precession
frequency. Design study of the magnet is in progressin collaboration with IPNS and the Cryogenics Science
Center. Magnetizations of the electrical devices for thedetector were measured, showing that an optical module strongly disturbs the field homogeneity.
A muonium hyperfine structure (MuHFS) measurement using the same beam line as the g-2/EDM project has been also proposed by a group of IMSS. In thisexperiment, the energy state transition in muonium
will be observed under a static magnetic field with local
homogeneity of 1 ppm. A superconducting magnet fora MRI system has been purchased and prepared for theexperiment (Figure 6). A magnetic shield room to isolate the magnet from magnetic disturbances has been
designed.

Fig. 6. Superconducting magnet for the MuHFS experiment
in MLF.

Information System

Information System

J-PARC Annual Report 2012

36

J-PARC Network (JLAN) Upgrade
Since 2002 the J-PARC network infrastructure, called
JLAN, has been operated independently from KEK LAN
and JAEA LAN in terms of logical structure and operational policy. The Information System Section designs,
manages and operates the network system and also
performs the research and development activities of
the Authentication System and the Data Base System for
J-PARC. Each System is aiming to be both secure andeasy-to-use ICT (Information Communication Technology) infrastructure for the J-PARC users and staffs.
In July 2012, the JLAN was upgraded to cope with

the increasing demands for network bandwidth. The
older network system provided a bandwidth of 100
Mbps for terminal ports, 1 Gbps for the Internet and2 Gbps for the Tokai-Tsukuba connection. The newly
upgraded system provides bandwidth of 1 Gbps for terminal ports, 10 Gbps for the Internet and 8 Gbps for theTokai-Tsukuba connection respectively. In addition toincreased network capacity, the upgrade has made JLAN
more robust by introducing redundant switch configuration and connections. Figure 1 shows the logical configuration of the network before and after the upgrade.

Before upgrading

After upgradinginternet

internet
FW

FW

FW

FW

Core
SW

Core
SW

Core SWat Tsukuba

Edge SW

Core SWat TokaiCore SWat Tsukuba

at each building

Edge SW

Edge SWat each building

Edge SW

Tokai Area

Tsukuba Area

Tokai Area

Tsukuba Area

Fig. 1. After the JLAN upgrade, the firewall system and core switch, connections between
core and edge switches and gateway to the internet were made redundant.

Statistics of Network Utilization
In 2012, the total number of hosts on JLAN exceeded 3500 and the number has increased by 117% fromthe last year. The growth curve of edge switches, wireless LAN access points, and hosts connected to JLAN are
shown in Fig. 2. JLAN has also played an important rolein connecting the Tokai area, where the main J-PARC
facilities were built, and the Tsukuba area, where themajor computer resources for data analysis are located.

Figure 3 shows the statistics of annual data transfer between the two sites. The bandwidth capacity for theconnection is currently 1 Gbit/s x 8 = 8 Gbit/s and theusage level has been approaching half of it, especiallyduring the period when the Hadron facility was running. Figure 4 also shows the network utilization of theinternet. The bandwidth capacity for the internet is 10
Gbit/sec, which allows enough extra activity.

J-PARC Annual Report 2012

Information System

37
250

4000

200

WLAN Access Points

3000

SW and WLAN AP

No. of hosts
2500

150

2000
100

1500
1000

50

No. of Hosts connected to JLAN

3500

Edge Switches

500
0

0

No. of Hosts, edge SW and wireless AP on JLAN

Fig. 2. Increase of hosts, edge switchs and wireless access points on JLAN.

4.0

Tokai -> Tsukuba Data Transfer Rate

3.5
3.0

2hour average

2.0
1.5

2011
Max.
0.83Gbps

1.0
0.5
0.0
Jul-125 min peak

←JLAN upgrade

Gbit/sec

2.5

Aug-12

Sep-12Oct-12

Nov-12

Dec-12

Jan-13

Feb-13Mar-13month-year

Fig. 3. Tokai - Tsukuba Data transfer rate.

1

0.8

Gbit/sec

0.6

Internet (5min avg)

2011
Max.
0.21Gbps(to)0.29Gbps(from)

from internet
to internet

0.4

0.2

0
Jun-12

Jul-12

Aug-12Oct-12

Nov-12

Dec-12

Jan-13month-year

Fig. 4. Data transfer rate between JLAN and the Internet.

Feb-13Mar-13

Information System

J-PARC Annual Report 2012

38

Statistics of Computer Resources Utilization
Though J-PARC does not have its own computing
facility for physics analysis, since 2009 the KEK centralcomputer system at KEK Tsukuba site has been mainly
used for the purpose. For J-PARC the resources of 1600
SPECint06 computing power, 150 TBytes RAID disksand 2 PBytes tape libraries were assigned. In April 2012,
the KEK central computer system was upgraded andcomputer resources of 25,000 SPECint06 computing
power, 1.2 PBytes disks and 5 PBytes tapes were newly
assigned for J-PARC.
In the Neutrino (T2K experiment) and Hadron experiments, the data taken in the J-PARC experimental
hall will be temporarily saved at the Tokai site and thenpromptly 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. Figures 5, 6 and 7 show
the utilization statistics of the computer resources in2012. The main Hadron users who used the systemconstantly were those who continue their experiment(Koto Exp. Group) in series from the former KEK 12 GeV
Proton synchrotron to J-PARC. The Neutrino experiment group sometimes used the CPU power, but not somuch. On the other hand, they stored the experiment’s
data steadily both to the disks and tapes on the system.

Assigned resources
to J-PARC

New system

Old systemratio

CPU (SPECint06)

25,000

1,600

× 16

Disk (TB)

1,200

150

×8

Tape (PB)

5

2

× 2.5

CPU usage

100

J-PARC neutrino

J-PARC MLF

J-PARC Hadron

Other KEK use

80

60

40

20

0

Fig. 5. CPU utilization on the KEK central computer system by the J-PARC groups.

J-PARC Annual Report 2012

Information System

39

300

Disk Storage

250
J-PARC Hadron

TBytes200

J-PARC Neutrino
J-PARC MLF

150
100
50
0

Fig. 6. Disk utilization on the KEK central computer system by the J-PARC groups.

900

Tape Storage

800
700

TB

600
500
400
300
200

J-PARC Hadron
J-PARC Neutrino
J-PARC MLF

100
0

Fig. 7. Tape utilization on the KEK central computer system by the J-PARC groups.

Transmutation Studies

Transmutation Studies

J-PARC Annual Report 201242

Activities
MEGAPIE
Several meetings on MEGAPIE (MEGAwatt Pilot
Experiment) were held at Paul Sherrer Institute (PSI),
Switzerland in April 2013. The meetings dealt with thestatus of the MEGAPIE target Post Irradiation Examination (PIE) and the sample shipping, the PIE plan of each
institute. Another discussion topic was the schedulingof PIE and the condition of each of the tests.
As of PIE, the scientists reported the results ofanalysis of the Lead-Bismuth Eutectic Alloy (LBE) takenfrom the irradiated target. The γ-spectra measurement
revealed that elements with low solubility in LBE or sensitive to oxidation (rare earth elements) are enriched at
LBE/steel and LBE/cover gas interfaces. The α-spectra
measurement showed that Polonium is homogeneously

distributed in LBE.
With regard to the sample shipping, it was reported
that the cutting of the samples, followed by sample
cleaning, finished by the end of February and in lateMarch the sample transport has already started. Afterthe meetings, in May 2013, samples from the Japan
Atomic Energy Agency (JAEA) were shipped and successfully transported to WASTEF in JAEA-Tokai.
In the meetings, the PIE plan of each institute including JAEA was presented and considered. The schedulingand the test conditions were also discussed. Deadlineof the PIE report was decided as TRM (Technical Review
Meeting) to be held in October 2014. Test conditions fortensile test were determined for the present.

SPALLATION TARGET DESIGN for the Transmutation Experimental Facility
JAEA studies an accelerator-driven system (ADS) for
transmutation of long-lived radioactive nuclides. ADS
is a tank-type subcritical reactor with thermal powerof 800 MWth, which uses LBE as a target material anda coolant, driven by a 30 MW superconducting proton
LINAC. The construction of the Transmutation Experimental Facility (TEF) was planned in order to performbasic and elemental R&D for ADS within the frameworkof the J-PARC project. TEF consists of a 250kW spallation target facility and a 500W critical assembly facility,
designed to perform elemental study for the LBE spallation target and fundamental research for the subcriticalcore of ADS. An important issue in the development
of TEF is the estimation of the thermal-fluid propertiesof the flowing LBE in the high power spallation target,
which is illustrated in Figure 1. LBE has the tendency
to cause corrosion/erosion to the structural materials.
And the beam window of ADS, which separates the
proton accelerator and the LBE subcritical core vessel, is
exposed to the high temperature environment inducedby the incidence of proton beams. Therefore, the feasibility of the beam window is the most important issueduring the construction of TEF. A test to determine thefeasibility of the designed beam window for the TEF
target using numerical analysis with a 3D model was
performed. The analysis took into consideration (1) the
current density and shape of the incident beam, (2) thethermal-fluid behaviour of LBE around the beam window as a function of the flow rate and the inlet temperature, (3) the material and the thickness of the beam

window, (4) the structural strength of the beam window.

Fig. 1. Prototype design of the spallation target head for TEF.

In the reference case, the peak current density andthe profile of the proton beam were set to 20 μA/cm2
and a Gaussian shape, respectively. The material forthe beam window was 2-mm thick SUS316 stainlesssteel. The flow rate of LBE and the temperature at the
inlet position were assumed to be 1 litter/sec and 350ºC. These parameters were fixed based on the rated
operation condition of 800MW ADS. In this reference
case, the maximum velocity of LBE was formed at thecenter of the beam window with a value of about 1.2
m/sec. At the same position, a maximum temperatureof 477 ºC at the beam window is observed, as shown infigure 2. By increasing the flow rate of LBE by up to 4

J-PARC Annual Report 2012

Transmutation Studies

43
litter/sec, the maximum temperature of the beam window was reduced to around 420 ºC. In the reference
case, the maximum shear stress was 194 MPa, which
was observed at the center on the outside surface ofthe beam window. The analyzed stress in the referencecase was lower than the tolerance level of the material’s
stress strength at this operation temperature, hence
the feasibility of the designed beam window was confirmed by the reference case of the TEF spallation target
operation.

Fig. 2. Temperature profile at the reference condition.

SafetySafety

J-PARC Annual Report 2012

46

Radiation Safety
J-PARC is managed under the Law Concerning Prevention from Radiation Hazards Due to Radio-Isotopes,
etc. in the Japanese legal system. A license for its use
must be issued by the Ministry of Education, Culture,
Sports, Science and Technology (MEXT), and the related
safety inspection must be conducted by the Nuclear
Safety Technology Center (NUSTEC). Table 1 shows listsof existing licenses at the end of Japanese fiscal year
(JFY) 2011 and license applications for JFY 2012.
The 13th Radiation Safety Committee of J-PARC met
on June 18, 2012 and discussed the alternative application of the J-PARC facilities. The main topics were 1)
the power-up for all of the facilities (except the Hadron
Experimental Facility (HD)), 2) the new secondary beamline (muon) in the Materials and Life Science experimental Facility (MLF). The intended power-up level atthis time is 300 kW for user operation in MLF. And the
Neutrino Experimental Facility (NU) aims to reach 450
kW operation.

The 14th Radiation Safety Committee of J-PARC
met on December 19, 2012 and discussed the alternative application of the J-PARC facilities. The main topic
was the installation of the beam line in the LINAC facility to test the first-stage accelerator (Radio Frequency
Quadrupole: RFQ), which is designed to allow a larger
beam power and will replace the current RFQ in theaccelerator tunnel.
Figure 1 shows the increase of the number of radiation workers since 2005. In JFY 2012, 3133 individuals
were registered as radiation workers in J-PARC. Table
2 shows the distribution of annual radiation doses bytype of workers. The radiation exposure of the workers has been monitored individually with glass dosimeters and solid state nuclear track detectors. Almost all
the records for individual exposure were undetectable,
while 96 persons (3.1% of the workers) were recorded
to have received less than 5.0 mSv.

Table 1. License at the end of fiscal year 2011 and application items for license in fiscal year 2012.

MLF

Licenses at the end of fiscal year 2011

License applications for fiscal year 2012

Power : 3 GeV/320 kW
Secondary beam lines (neutron) : 18
Secondary beam lines (muon) : 1

Power : 3 GeV/350 kW

HD

Power : 30 GeV/50 kW
Secondary beam lines (meson) : 4

Neutrino facilities

Power : 30 GeV/300 kW

Secondary beam lines (muon) : 1

Power : 30 GeV/450 kW

3500

3113
3000

Number of radiation workers

Male

Female2653

2633

FY2010FY2011

2500

2154
1864

2000

1500

1000

704
408

500

61
0
FY2005

FY2006

FY2007

FY2008FY2009Fiscal Year

Fig. 1. Transition of the number of radiation workers.

FY2012

J-PARC Annual Report 2012

Safety47
Table 2. Distribution of annual doses by the type of worker in fiscal year 2012.
Dose range (mSv)
Undetectable

0.1
- 0.5

>0.5
- 1.0

>1.0
- 5.0

>5.0+

Total
workerCollective
dose(person-mSv)

Averagedose(μSv)

In-house staff

556

28

8

0

0

592

10.9

18.2

User

964

0

0

0

0

964

0

0

Contractor

1497

48

10

2

0

1557

16.6

10.6

Total *

3017

76

18

2

0

3113

27.5

8.8

Users OfficeUsers Office

J-PARC Annual Report 201250
The J-PARC Project was approaching the end of its
Phase 1, when the J-PARC Center Users Office (UO) was
created on April, 2007, as part of the Users Affairs Section. Around that time, there were no so-called J-PARC
users and the number of J-PARC visitors was far smaller
than today. However, preparing a system for receiving
J-PARC users was one of the challenges the section was
facing. UO was located in a corner of a room of the Administration Division, which consisted of two sections,one of which was the Users Affairs Section.
Since it was estimated that the number of users
would increase, UO moved on December, 2007, to the
Ibaraki Quantum Beam Research Center (IQBRC) building located about “300 m” from the main gate of the
J-PARC. The new UO office was large enough to deal
with the numerous users expected to come. In addition to the large office, there was another advantage.
Since it was located outside the J-PARC site, the users could firstly come to it to complete the necessary
procedures for conducting experiments and receive
J-PARC User ID Cards, which were required to passthrough the main gate of the J-PARC. Here at IQBRC
the UO team members have been committing themselves to their tasks.
The primary function of UO in the Japanese fiscal
year (JFY) 2012 was to provide support to the J-PARC
users. The support covered a wide range: user registration, procedures for conducting experiments, daily life
information, etc. The team members who had directcontact with the users were crucial to fulfilling the tasks.
However, there were other indispensable team members. System engineers maintained or developed fourmain web-based systems: proposal submission system,
proposal review system, user support system and experimental report management system. Some teammembers took care of management and maintenanceof the Tokai Dormitory, which was a main accommodation for the J-PARC users, built and maintained user database, renewed the contract of renting the UO officerooms in IQBRC, etc.
From the perspective of the time and human resources devoted, we should describe first the achievements conducted by the team members who had directcontact with the users. However, in this Annual Report
2012, the development and improvement conductedin JFY 2012 are firstly described to highlight them, followed by other achievements.
J-PARC safety instructions were executed at UO or
facilities where users were scheduled to conduct theirexperiments. The instruction consisted of general safe-

ty instruction, specialized safety instruction for each facility and J-PARC radiation safety instruction. UO andother departments in charge considered the possibilityof adopting online safety instruction. As a result it was
decided that general safety instruction and specialized
safety instruction for each facility could be executed
online. And the online general safety instruction application was embedded in the user support system.
UO constructed bicycle parking lot with roof which
could accommodate about 40 bikes.
UO and International Affairs Department of Japan
Atomic Energy Agency (JAEA) built up a database ofsamples and chemicals foreign users were scheduled
to bring into J-PARC. To observe Foreign Exchange andForeign Trade Control Law, it was helpful in deciding
the necessary procedures before shipping them.
Other achievements were as follows:
1. User registration and pre-visit procedures:(1) confirmed eligibility of user registrations andapproved them through the user support system; (2)arranged the Tokai Dormitory bookings in the casethe automatic booking system did not function; (3)booked other accommodations when the Tokai Dormitory was fully booked; (4) checked applications forindividual dosimeters; (5) arranged safety instructions;(6) issued temporary Shuttle Bus Passes; (7) checked
eligibility of Foreign National Visit Proposals; (8) issued
letters of guarantee for visa application; (9) applied for
certificates of eligibility for visa application;(10) calculated the amount of travel expenses of inter-university
research users whom KEK had accepted.
2. Procedures upon arrival:(1)issued J-PARC User ID Cards; (2) executed safety
instructions; (3) handed users individual dosimeters; (4)issued car driving permission passes; (5) issued J-PARC
card keys to enter the J-PARC facilities during off-hours;(6) lent out bikes and handy phones for internal calls at
J-PARC.
3. Post-visit Procedures:(1) checked MLF machine time completion forms
or MLF experimental reports submitted by users andforwarded them to persons who had responsibilities forapproving them.
4. User Statistics:(1) collected fundamental user statistics; (2) produced other user statistics when required.

Users Office

J-PARC Annual Report 201251
5. Others:(1) closed the Tokai dormitory’s books every day; (2)took sick or injured users to hospitals; (3) booked taxis
or airport limousines; (4) posted announcements aboutuser support system shutdown, blackout, etc.

person-days are chronologically 27,555 in JFY 2009,
29,030 in JFY 2010, 15,539 in JFY 2011 and 32,242 in JFY
2012. The cause of the plummet in JFY 2011 was theGreat East Japan Earthquake, which occurred on March
11, 2011. However, as J-PARC recovered from the damage, the users came back. And in January, J-PARC received more users than those in the same month of theprevious year.

The final item covered here is the number of the users.
The numbers of annual users in a JFY counted by(1) Users in 2012 (according to organizations, person-days)
Japanese Universities

Japanese Universities
Public Organizations
Private Enterprises
Foreign Organizations

Public Organizations
Private Enterprises
2,500

Foreign Organizations

13,797

15,895

2,000
1,500
1,000
500

1,296

1,254

0
4
2012

5

6

7

8

9

10

11

12

1
2013

2

3

(2) Users in 2012 (according to facilities, person-days)
MLF
HadronNeutrino
Accelerator

807

8,271

14,013

2,500

MLF

9,151

2,000

Hadron1,500

Neutrino
Accelerator

1,000
500
0
4
5
2012

6

7

8

9

10

11

12

1
2
2013

3

Users Office

J-PARC Annual Report 201252(3) Users in 2012 (Japanese・Foreigners, person-days)
4,500

Foreigners

4,000Japanese

3,500
3,000
2,500
2,000
1,500
1,000
500
0
4
2012

5

6

7

8

9

10

11

12

1
2013

2

3

User Program

User Program

J-PARC Annual Report 2012

54

Overview of MLF Use(1) Basic policy of MLF use
The Materials and Life Science Experimental Facility (MLF) is available to Japanese and overseas users forboth academic research and industrial applications. The
following peer review systems are introduced for fair,
clear and user-oriented facility management: User Consultative Committee, Neutron/Muon Science Proposal
Review Committee, and Neutron/Muon Science Instrument Review Committee. All nonproprietary proposals
are reviewed and ranked by the Neutron/Muon Program
Review Committee. The J-PARC Center is responsible forthe beamtime allocation for approved proposals.
(2) Registered Institution for Facility Use Promotion(RIFUP)
Consistent with its longstanding policy of promoting open access to major publicly-funded research facilities, the Japanese Government in July 2009 designatedthe accelerators (linac and 3 GeV proton synchrotron)and some beamlines at J-PARC MLF as Public Neutron
Beam Facility under the terms of the so-called “Public
Use Promotion” legislation. The aim of the legislation
is to advance science and technology through the effective promotion and operation of general user accessprogram at designated large-scale research facilities.
The legislation requires that the user program on the
Public Beamlines be managed and supported by an independent, third-party organization. This organization
is known as RIFUP.
Comprehensive Research Organization for Scienceand Society (CROSS) applied for RIFUP in February 2011
and was allowed by the Minister of the Ministry of Education, Culture, Sports, Science and Technology (MEXT)
to operate as RIFUP. Accordingly, CROSS commenced
its operation on the 1st of April 2011 at its Tokai officein the Ibaraki Quantum Beam Research Center (IQBRC)
adjacent to the J-PARC site.
(3) MLF Instrument Use
There are 23 neutron beam extraction ports for thepulsed spallation neutron source and 4 muon extraction channels for the muon target at MLF.
Not only can JAEA or KEK, the parent organizationsof J-PARC, construct instruments for conducting experiments using the neutron and the muon beams, but
third parties can do it too. However, the manufacturersof the instruments at MLF are obliged to manage andmaintain their beamline instruments.

Beamtime provided to J-PARC users is classified into
three categories: one managed by J-PARC Center, one
managed by a third-party, and one managed by CROSSTokai. The third-party must supply to the J-PARC Centera little portion of its full beamtime in exchange for having exclusive rights to use the beamline instruments.
Therefore, the J-PARC user program is carried out
using all the beamtime for the instruments owned by
JAEA or KEK and part of the beamtime for those ownedby the third parties. Proposals for MLF use program arereviewed uniformly and openly.
(4) MLF Access modes(a) Beamtime managed by J-PARC Center
There are three access modes to obtain outstanding scientific results or to meet the various needs ofusers: general use, project use and instrument groupuse. An applicant to general use must be an employeeof or affiliated with a legal organization or entity that
may be any of the following: a public or private college, university or other institute of higher education,a public or not-for-profit research organization, or a
private company. A postdoctoral fellow is also eligible
to submit proposals with the permission of his/hermanager or supervisor at the home institute/organization to conduct research activities at MFL. Project use
is the access mode in which JAEA or KEK conducts its
mission-oriented programs such as inclusive scientificresearch projects or research programs proposed tofulfill plans to achieve midterm goals of JAEA, joint research programs and contract research programs withother institute(s)/organization(s). Experiment proposals requesting beamtime longer than one year may
be acceptable for the project use. Only personnel belonging to either JAEA or KEK or a person approved by
the director of the J-PARC Center can apply for projectuse. Instrument group use is the access mode in which
the scientists responsible for the instruments maintainthem in good condition and/or develop their performances to provide the J-PARC users with the most superior experimental environments.
(b) Beamtime managed by a third party-Ibaraki
Prefecture
Ibaraki Prefecture constructed, for industrial application research, Ibaraki Biological Crystal Diffractometer (iBIX) and Ibaraki Materials Design Diffractometer(iMATERIA).

J-PARC Annual Report 2012

User Program

55
There are three access modes: Industrial Use Open
Projects, Prefectural projects and Urgent use. Industrial
Use Open Projects are classified into two types of uses:
regular-interval use for which projects are accepted ineither the first or the second half of the year and occasional use for which projects are accepted as late as
about one month prior to the date the desired cycle
starts. Prefectural projects are for industry-academicgovernment collaboration research led by Ibaraki Prefecture or for promoting an advantage of neutron use
to a certain industry. Urgent use is for projects moreurgent than the regular ones.
(c) Beamtime managed by CROSS-TokaiCROSS-Tokai manages and supports the user program on the six neutron Public Beamlines (BL01, BL02,
BL11, BL15, BL17, BL18). There are six kinds of accessmodes for these Beamlines.
1) General Use
General Use access works in exactly the sameway for the Public Beamlines as it does for all other MLF instruments. This is the appropriate accessmode for most researchers wishing to use the neutron Public Beamlines at J-PARC MLF.
To encourage and provide access to the widest
possible range of users, General Use is, in principle,
open to all local and international researchers whowish to exploit the neutron beams and instrumentsin their research programs. Proposals are welcomedfrom researchers with academic, government or private research affiliations.
2) Elements Strategic Use
The government project to generate materials
which serve as alternatives to rare materials such as
rare earth or rare elements started in 2012. There
are four categories in the project: magnet materials,
catalytic or battery materials, electronic materials
and construction materials. Elements Strategic Use
is aimed at promoting that project.
3) Trial Use
Trial Use is aimed at assisting novice users of neutron-based experimental techniques to gain experience and expertise that will allow them to become
independent General Use applicants in the future. It
may also be used for first-time users of pulsed neutrons to determine the experimental feasibility.
The Trial Use framework offers a wide range ofservices to potential new users, including support
and guidance provided by a CROSS-Tokai Science
Coordinator.

4) Director’s Discretion
A proportion of the total available beamtime isreserved for allocation at the discretion of the Director of CROSS-Tokai. This time may be allocated tourgent proposals that warrant expedited access orused for approved outreach or education activities
of CROSS-Tokai.
5) CROSS-Tokai Research
In this access mode, members of the Neutron
R&D Division of CROSS-Tokai can apply for beamtime
to carry out research aimed at developing and advancing research activities on the Public Beamlines.
Proposals with strong scientific objectives that expand the range of facility usage will be assessed andranked together with General Use proposals.
6) Facility Use
To ensure that instruments with the highest
possible performance and capability are available
to users, this access mode allows members of thebeamline group to carry out work associated withthe maintenance, development and testing of the instruments. This access mode also facilitates the useof beamlines for approved research projects of thebeamline owner organization (JAEA).
(5) Call for General Use Proposals to access theneutron and muon beamlines
J-PARC Center and CROSS-Tokai announced theCall for General Use Proposals to access the neutron
and muon beamlines in the 2012A and 2012B operations periods.
Call for proposals for the first half of 2012 (2012A term):
Nov. 17 - Dec. 7, 2011
The review results were announced on March 30, 2012.
Call for proposals for the second half of 2012 (2012B
term): May 17 - June 7, 2012
The review results were announced on Sep. 21, 2012.
(6) Basic Concept of Nonproprietary Use
Research results obtained through J-PARC use
should widely be shared by people all over the world,which enable us to step into the unknown world effectively and efficiently. Based on this idea, no beamtime
fee is charged as long as the research results are published for public viewing.

User Program

J-PARC Annual Report 2012

56

Proposal Review System for MLF
The JAEA-KEK-CROSS Agreement of Cooperation on the Promotion of Public Utilizationof the Specific Neutron Beam Facilities at J-PARC (Enacted on 1 April 2011)
President
JAEA

Director General
KEK

J-PARC
Center(JAEA/KEK)

Collaboration
Committee

Director
J-PARC

Selection
Committee

All except Contract Contract Beamlines
Beamlines
Only
Muon Science
Proposal Rev. Comm.

Neutron Instrument Contract Beamline
Proposal Rev. Comm. Evaluation Comm.
Joint Meeting

Muon
Instrument
Proposals

Neutron Instrument
Proposals
Muon Program
Advisory Comm.

Muon Scientific Proposals

Director
CROSS-Tokai

Registered
Institution(CROSS)

Public Beamlines Only

All except Public Beamlines

MLF Advisory
Board

Muon Instrument
Proposal Rev. Comm.

President
CROSS

All except Public
Beamlines

Task Forces

Public Beamlines Only

Proposal
Neutron Science
Proposal Rev. Comm. Evaluation Comm.
Joint Meeting

Public Beamlines Only
All except Public Beamlines
Neutron Program
JAEA Research
CROSS Development
Advisory
Proposal Advisory Proposal Evaluation
Committee
Committee
Panel
Joint Meeting

Neutron Scientific Proposals

Unified
Access Point

ALL Proposals submitted via the J-PARC Users OfficeUser Program

J-PARC Annual Report 201257

MLF Proposal Snmmary - FY2012
Table 1. Breakdown of Proposal Numbers for the 2012A & 2012B Rounds.
Beamline
BL01
BL02
BL03
BL04
BL05
BL08
BL10
BL11
BL12
BL14
BL15
BL16
BL17
BL18
BL19
BL20
BL21
D1
D2
U

Instrument
4D-Space Access Neutron Spectrometer - 4SEASONS
Biomolecular Dynamics Spectrometer - DNA(100-b)‡Ibaraki Biological Crystal Diffractometer iBIX(b)†
Accurate Neutron-Nucleus Reaction Measurement Instrument - ANNRI
Neutron Optics and Physics - NOP
Super High Resolution Powder Diffractometer - S-HRPD
Neutron Beamline for Observation and Research Use NOBORU

2012A
Submitted
Approved
GU PU/S IU GU PU/S IU
9
2
2
9
2
2
3
3
2
2
3
2
1
0
0
1
0
0
1
11
0
1
11
0

High-Pressure Neutron Diffractometer - PLANETHigh Resolution Chopper Spectrometer - HRC
Cold-neutron Disk-chopper Spectrometer - AMATERAS
Small and Wide Angle Neutron Scattering Instrument TAIKAN

2012B
Submitted
GU
PU/S
15
2
8(2#)
3
1
0
2
11

IU
2
2
0
0

Approved
GU
PU/S
8
2
7(1#)
3
1
0
2
11

IU
2
2
0
0

2

1

1

2

1

1

7

1

1

7

1

1

2
9

1
1

0
0

2
6

1
1

0
0

1
16

1
1

0
0

1
10

1
1

0
0

8

4

1

8

4

1

14

4

1

11

4

1

0
5
16

0
1
2

1
0
1

0
1
11

0
1
2

1
0
1

0
4
16

0
1
2

1
0
1

0
4
11

0
1
2

1
0
1

16

6

1

16

6

1

35(5#, 2+)

6

1

19(5#, 2+)

6

1

1

0

7

1

0

17

1

0

17

1

0

3

2

5

3

2

18(3#)

3

2

9(3#)

3

2

2

3

4

2

3

11(1#)

2

3

5(1#)

2

3

4
0
12
1
1
0
1
57
253

1 15
0 11
0 27
0
6
1
5
1 12
0
0
17 151

4
0
12
1
1
0
1
57
225

1
0
0
0
1
1
0
17

26
15
23
21
16
9
0
275

4
0
12
1
1
0
1
57
349

1
0
0
0
1
1
0
17

21
9
23
15
13
8
0
161

4
0
12
1
1
0
1
57
235

1
0
0
0
1
1
0
17

High-Performance Neutron Reflectometer with a hori7
zontal Sample Geometry - SOFIA
Polarized Neutron Reflectometer - SHARAKU
8
Extreme Environment Single Crystal Neutron Diffractom4
eter - SENJUEngineering Diffractometer - TAKUMI
18
15(100-b)‡Ibaraki Materials Design Diffractometer iMATERIA
28(b)†High Intensity Total Diffractometer - NOVA
6
Muon D1
7
Muon D2
14
Muon U0
Subtotal
179
Total

GU : General Use
PU : Project Use or Ibaraki Pref. Project Use
IU : Instrument Group Use
S : S-type Proposals† : Ibaraki Pref. Exclusive Use Beamtime (β = 80% in FY2012)‡ : J-PARC Center General Use Beamtime (( 100-β = 20% in FY2012)# : Proposal Numbers under Trial Use Access System in GU+ : Proposal numbers under Element Strategy in GU

350

Proposals

300

114

250

28

200
150
100
50

21

16
34
67

124

2008

2009A

4
90

150

21

33
166

12

2010B
2011A
Proporsal Round

2011B

159

225

235

2012A

2012B

89

0
2009B

2010A

Figure 1. MLF Proposal Numbers over Time.

Not Approved
Approved

User Program

J-PARC Annual Report 2012

58
Table 2. Principal Investigator Affiliations in FY2012.
Universities(Japan)

JAEA

Companies(Japan)KEK

Foreign Organizations

Research Institutes(Japan)

212

141

101

34

46

68

Research
Institute (Japan)
Foreign
11%
Organization
8%
KEK
Companies
6%(Japan)17%

Universities (Japan)

Universities(Japan)35%

JAEA
Companies (Japan)

JAEA
23%

KEK
Foreign Organizations
Research Institutes (Japan)

Figure 2. Origin of Proposals in FY2012.

Table 3. Proposals by Sub-committee/Expert Panel – FY2012.
Sub-committee
Expert Panel

P1

P2

P3

P4

P5

P6

P7

P8

P9

P10

Q1

Q2

No. of Proposals

96

29

44

14

77

15

56

25

11

2

14

32

P9
P8 2.5%
6%

P10
0.5%

Q1
3%
Q2
8%

P7
14%
P5
19%
P6
4%

P1
23%

P2
7%
P3
11%

P4
3%

P1: Crystallography
P2: Liquid and Amorphous Materials
P3: Nanomaterials
P4: Biomaterials
P5: Magnetism and Strongly-Correlated Systems
P6: Fundamental Physics
P7: Industrial Applications
P8: Research and Development
P9: Trtial Use
P10: Element Strategy
Q1: Magnetic and Strongly Correlated Electronic Materials
Q2: Chemical Physics and General Science

Figure 3. Submitted Proposals by Sub-committee/Expert Panel – FY2012.

J-PARC Annual Report 2012

User Program

59

Proposal Review System for Nuclear and Particle Physics
Experiments at the J-PARC “50 GeV” Proton Synchrotron
Institute of Particle and Nuclear Studies (IPNS) at KEK

Council for IPNS䐠Elect the PAC members
IPNS
Director
Program Advisory Committee(PAC)

䐟 Proposal Submission
䐠 Evaluation Request
䐡 Evaluation Request
䐢 Evaluation Result
䐣 Evaluation Report䐤 Result Announcement

J-PARC Center

䐣
䐤

䐟

䐡
J-PARC User䐢

The15h Program Advisory Committee (PAC) meeting was held on July 13 - 15, 2012.
The 16th PAC meeting was held on January 9 - 11, 2013.

Approval Summary of the Nuclear and Particle Physics
Experiments after the 16th PAC Meeting (January 9, 2013)(Co-)
pokespersons
E03 K. Tanida

Affiliation
SNU

Title of the experiment
Measurement of X rays from X- Atom

U.of Illinois at Urbana- Measurement of High-Mass Dimuon Production at theChampaign; KEK
50-GeV Proton Synchrotron
Spectroscopic Study of X-Hypernucleus, 12XBe, via theE05 T. Nagae
Kyoto U
12C(K-, K+) Reaction
Measurement of T-violating Transverse Muon
E06 J. Imazato
KEK
Polarization in K+ -> p0 m+ n Decays
K. Imai,
JAEA,
Systematic Study of Double Strangeness System with an
E07 K. Nakazawa, Gifu U,
Emulsion-counter Hybrid Method
H. TamuraTohoku U

J.C. Peng;
P04
S. Sawada

Approval status Slow line priority(PAC
Day1 Beamline
recommendation) Day1 Priority
Stage 2

K1.8

DeferredPrimary

Stage 2

1

K1.8

Stage 1K1.1BR

Stage 2

K1.8

Stage 1K1.8

E08 A. Krutenkova ITEP

Pion double charge exchange on oxygen at J-PARC

A. Sakaguchi,
E10
T. Fukuda

Osaka U
Osaka EC U

E11 T. Kobayashi

KEK

Production of Neutron-Rich Lambda-Hypernuclei with theStage 2
Double Charge-Exchange Reaction (Revised from Initial P10)
Tokai-to-Kamioka (T2K) Long Baseline Neutrino
Stage 2
Oscillation Experimental Proposal

E13 T. Tamura

Tohoku U

Gamma-ray spectroscopy of light hypernuclei

Stage 2

E14 T. Yamanaka

Osaka U

Proposal for KL -> p0 n n-bar Experiment at J-PARC

Stage 2

M. Iwasaki,
E15
T. Nagae

RIKEN,
Kyoto U

E16 S. Yokkaichi

RIKEN

A Search for deeply-bound kaonic nuclear states by inflight 3He(K-, n) reaction
Electron pair spectrometer at the J-PARC 50-GeV PS to
explore the chiral symmetry in QCD

R. Hayano,
H. Outa
H. Bhang,
E18 H. Outa,
H. Park

U Tokyo,
RIKEN
SNU,
RIKEN,KRISS

E19 M. Naruki

KEK

E17

Day1

Stage 2K1.8
neutrino
Day1

Stage 2

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

Stage 2High-resolution Search for Q+ Pentaquark in p-p -> K-X
ReactionsStage 2

K1.8
KL

Day1

Stage 1

Precision spectroscopy of Kaonic 3He 3d->2p X-rays

2

K1.8BR
High pDay1

K1.8BR
K1.8

Day1

K1.8

User Program

J-PARC Annual Report 2012

60

(Co-)
pokespersons
E21 Y. Kuno
E22

S. Ajimura,
A. Sakaguchi

Affiliation
Osaka U
Osaka U

T25 S. Mihara

KEK

P26 K. Ozawa

KEK

E27 T. Nagae

Kyoto UP29 H. Ohnisi

RIKEN

E31 M. Noumi

Osaka U

T32 A. Rubbia

ETH, Zurich

P33 H.M. SHIMIZU Nagoya U
P34

N. Saito,
M. Iwasaki

KEK,
RIKEN

E36

M. Kohl
S. Shimizu

Ohio U,Osaka

P40 K. Miwa

Tohoku U

Approval status Slow line priority(PAC
Day1 Beamline
recommendation) Day1 Priority
New
An Experimental Search for μ − e Conversion at a
Stage 1beamline
Sensitivity of 10−16 with a Slow-Extracted Bunched Beam
Exclusive Study on the Lambda-N Weak Interaction inStage 1K1.8
A=4 Lambda-Hypernuclei (Revised from Initial P10)
will be coordinated
Extinction Measurement of J-PARC Proton Beam at
Test
K1.8BR
by JPNC
K1.8BR
Experiment-+AZ ->
Search for ω-meson nuclear bound states in the πK1.8
n+(A-1)ω(Z-1) reaction, and for ω mass modification in the Stage 1
in-medium ω->π0γ decay.
Search for a nuclear Kbar bound state K-pp in the d(p+,Stage 2K1.8
K+) reaction
Search for φ-meson nuclear bound states in the pbar +Stage 1
K1.1
AZ -> φ + (A-1)φ(Z-1)reaction
Spectroscopic study of hyperon resonances below KN
Stage 2
K1.8BR
threshold via the (K-, n) reaction on DeuteronTowards a Long Baseline Neutrino and Nucleon Decay
schedule andExperiment with a next-generation 100 kton Liquid
Testbeam time will
K1.1BR
Argon TPC detector at Okinoshima and an intensity
Experiment
be coordinatedupgraded J-PARC Neutrino beamby JPNC
Title of the experiment

Measurement of Neutron Electric Dipole Moment

Deferred

Measurement of the cross sections of Σp scatterings

Ohio U,JAEA

T46 K. Ozawa

KEK

EDIT2013 beam test program

Test
Experiment

T47 Y. Aramaki

RIKEN

T48 A. Toyoda

KEK

Test of Lead-glass EMC and GEM Tracker for the J-PARC
E16 Experiment
Test of Aerogel Cherenkov counter for the J-PARC E36
experiment

Test
Experiment
Test
Experiment

T49 T. Maruyama

KEK

Test for 250L Liquid Argon TPC

Test
Experiment

P50 H. Noumi

Osaka U

Charmed Baryon Spectroscopy via the (π, D*-) reaction

Deferred

Osaka U

E42 J.K. Ahn

Pusan National U

P45

K.H. Hicks,
H. SakoMLF
K1.1BR

Stage 1An Experimental Search for μ − e Conversion in Nuclear Field
Deferred
at a Sensitivity of 10−14 with Pulsed Proton Beam from RCS
Search for H-Dibaryon with a Large Acceptance Hyperon
Stage 1
Spectrometer
3-Body Hadronic Reactions for New Aspects of Baryon
Stage 1
Spectroscopy

P41 M. Aoki

Linac

An Experimental Proposal on a New Measurement of theMuon Anomalous Magnetic Moment g-2 and ElectricStage 1
Dipole Moment at J-PARC
Measurement of Γ(K+ -> e+ ν)/Γ(K+ -> μ+ ν) and Search forStage 1heavy sterile neutrinos using the TREK detector system

K1.8
MLF
K1.8
K1.8
(will beperformed before K1.1BR
next summer)(completed)

K1.1BR(completed)

K1.1BR(will beperformed before K1.1BR
next summer)
High pOrganization and Committees

Organization and Committees

J-PARC Annual Report 2012

62

Organization Structure
J‐PARC Center Organization Chart
as of April 1, 2012

Accelerator Section I
H. Oguri

When applicable
Head / Deputy Head
Leader / Sub Leader

Accelerator Section II
M. Kinsho
Accelerator Section III
N. OuchiAccelerator Division

Accelerator Section IV

K. Hasegawa/ T. Koseki

K. Kikuchi
Accelerator Section V
F. Naito
Accelerator Section VI
N. Yamamoto
Neutron Source Section

Deputy Director(JAEA)
Y. Ikeda

M. Futakawa/ H. Takada

Materials & Life Science
Division
M. Arai / H. Seto, T. Kato

Neutron Science Section
T. Kamiyama/ K. Aizawa
Neutron Instrumentation Section
K. Soyama
MuonScience Section

ActingDirectorY. Miyake

Particle & Nuclear Physics
Division

S. Nagamiya

T. Kobayashi/ N. Saito
Transmutation Section

Deputy Director(KEK)

H. Oigawa/ K. Tsujimoto
Cryogenics Section

T. Miura

Director’s Office Members

Advisor (Center): K. Nishikawa
Advisor (Neutron): K. Kakurai
Advisor (Safety): T. Shibata
Advisor (International Relations):
T. K. Ohska
Leader (International Relations):
Y. Watanabe

T. Ogitsu/ Y. Makita
Radiation Safety Section

Safety Division
T. Miura / H. Nakashima

Y. Miyamoto / M. Numajiri
Health & General Safety Section
H. Nakashima / Y. Nakane
Management Support Section
H. Yoshikawa
Information System Section
A. Manabe/ K. Gorai
Public Relations Section
K. Suzuki

Administration
Division
T. Takahashi / T. Ikeda

General Affairs Section
T. Ikeda / Y. Kujiraoka
Users Affairs Section
T. Takahashi / Y. Togo, S. Takeuchi
Users Office

Y. TogoJ-PARC Annual Report 2012

Organization and Committees

63

Members of the Committees Organized for J-PARC(as of March, 2013)

1) Steering Committee
Yujiro Ikeda

J-PARC Center, Japan

Kazuhisa Kakurai

Japan Atomic Energy Agency, Japan

Satoru Kondo

Japan Atomic Energy Agency, Japan

Hideki Namba

Japan Atomic Energy Agency, Japan

Masaharu Nomura

High Energy Accelerator Research Organization, Japan

Katsunobu OideHigh Energy Accelerator Research Organization, Japan

Takayuki Sumiyoshi

High Energy Accelerator Research Organization, Japan

Yasuhide Tajima

Japan Atomic Energy Agency, Japan

Kazuyoshi YamadaHigh Energy Accelerator Research Organization, Japan

Masanori Yamauchi

High Energy Accelerator Research Organization, Japan

Hideaki Yokomizo

Japan Atomic Energy Agency, Japan

2) International Advisory Committee
Hamid Aït Abderrahim

Belgian Nuclear Research Center, Belgium

Hiroshi Amitsuka

Hokkaido University, Japan

Kelly Beierschmitt

Oak Ridge National Laboratory, USA

Sergio Bertolucci

CERN, Switzerland

Shinian Fu

Institute of High Energy Physics, Chinese Academy of Science, China

Hidetoshi Fukuyama

Tokyo University of Science, Japan

Donald Geesaman

Argonne National Laboratory, USA

Andrew Harrison

Institut Laue-Langevin, France

Hugh Montgomery

Thomas Jefferson National Accelerator Facility, USA

Jean-Michel Poutissou

TRIUMF, Canada (chair)Thomas Roser

Brookhaven National Laboratory, USA

Hoerst Stoecker

GSI, Germany

Andrew Taylor

Science and Technology Facilities Council, UK

Robert Tschirhart

Fermi National Accelerator Laboratory, USA

Hajimu Yamana

Research Reactor Institute, Kyoto University. Japan

Organization and Committees

J-PARC Annual Report 2012

643) User Consultative Committee for J-PARC
Masatoshi AraiJapan Atomic Energy Agency, Japan

Yasuhiko Fujii

CROSS, Japan

Makoto Hayashi

Ibaraki Prefecture, Japan

Tomohiko Iwasaki

Tohoku University, Japan

Toshiji Kanaya

Kyoto University, Japan

Yoshiyuki Kawakami

Eisai Co., Ltd., Japan

Yoshiaki Kiyanagi

Hokkaido University, Japan

Takashi Kobayashi

High Energy Accelerator Research Organization, Japan

Yoji Koike

Tohoku University, Japan

Sachio Komamiya

University of Tokyo, Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization, Japan

Junichirou Mizuki

Kwansei Gakuin University, Japan

Tomofumi Nagae

Kyoto University, Japan

Takashi Nakano

Osaka University, Japan

Tsuyoshi Nakaya

Kyoto University, Japan

Nobuyuki OsakabeCentral Research Laboratory, Hitachi, Ltd., Japan

Taku Sato

Tohoku University, Japan

Shinya Sawada

High Energy Accelerator Research Organization, Japan

Masaaki Sugiyama

Kyoto University, JapanJun Sugiyama

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

Hirokazu Tamura

Tohoku University, Japan

Kazuhiro Tanaka

High Energy Accelerator Research Organization, Japan

Eiko Torikai

Yamanashi University, Japan

Taku Yamanaka

Osaka University, Japan

Satoru Yamashita

University of Tokyo, Japan

4) Accelerator Technical Advisory Committee
Alberto Facco

National Institute of Nuclear Physics, Italy

David Findlay

Rutherford Appleton Laboratory, UK

Ronald Garoby

CERN, Switzerland

Subrata Nath

Los Aramos National Laboratory

Akira Noda

Kyoto University, Japan

Michael Plum

Oak Ridge National Laboratory, USA

Thomas Roser

Brookhaven National laboratory, USA (chair)

Jie Wei

Michigan State University, USA

Robert Zwaska

Fermi National Accelerator Laboratory, USA

J-PARC Annual Report 2012

Organization and Committees

655) Neutron Advisory Committee
Kurt Clausen

Paul Scherrer Institut, Switzerland

Phillip Ferguson

Oak Ridge National Laboratory, USA

Toshiji Kanaya

Kyoto University, Japan

Mahn Won Kim

KAIST, Korea

Yoshiaki Kiyanagi

Hokkaido University, JapanDan Neumann

National Institute of Standards and Technology, USA (chair)

Robert Robinson

Australian Nuclear Science and Technology Organization, Australia

Uschi Steigenberger

ISIS, UK

Werner Wagner

Paul Scherrer Institute, Switzerland

6) Muon Science Advisory Committee
Hiroshi Amitsuka

Hokkaido University, Japan

Toshiyuki Azuma

RIKEN, Japan

Klauss Jungmann

University of Groningen, Netherland

Elvezio Morenzoni

Paul Scherrer Institute, Switzerland (chair)

Yasuo Nozue

Osaka University, Japan

Francis Pratt

ISIS, UK

Jeff E. Sonier

Simon Fraser University, Canada

Jun Sugiyama

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

7) Radiation Safety Committee
Yoshihiro Asano

RIKEN, Japan

Shuichi Ban

High Energy Accelerator Research Organization, Japan

Yukihide Kamiya

High Energy Accelerator Research Organization, Japan

Satoru Kondo

Japan Atomic Energy Agency, Japan

Takeshi Murakami

National Institute of Radiological Science, Japan

Tetsuo Noro

Kyushu University, Japan

Shinichi Sasaki

High Energy Accelerator Research Organization, Japan

Seiichi Shibata

Kyoto University, Japan (chair)

Yoshitomo Uwamino

RIKEN, Japan

Takenori Yamaguchi

Japan Atomic Energy Agency, Japan

Yoshihiro Yamaguchi

Japan Atomic Energy Agency, Japan

Organization and Committees

J-PARC Annual Report 2012

668) MLF Advisory Board
Jun Akimitsu

Aoyama Gakuin University, Japan

Masatoshi AraiJapan Atomic Energy Agency, Japan

Koichiro Asahi

Tokyo Institute of Technology, Japan

Yasuhiko Fujii

CROSS, Japan

Masatoshi Futakawa

Japan Atomic Energy Agency, Japan

Makoto Hayashi

Ibaraki Prefecture, Japan

Shinichi Ito

High Energy Accelerator Research Organization, Japan

Masahiko Iwasaki

RIKEN, Japan

Ryosuke KadonoHigh Energy Accelerator Research Organization, Japan

Takashi Kamiyama

High Energy Accelerator Research Organization, Japan

Toshiji Kanaya

Kyoto University, Japan

Mikio Kataoka

Nara Institute of Science and Technology, Japan

Takashi KatoJapan Atomic Energy Agency, Japan

Yukinobu Kawakita

Japan Atomic Energy Agency, Japan

Kazuya Aizawa

Japan Atomic Energy Agency, Japan

Yoji Koike

Tohoku University, Japan

Yasuhiro Miyake

High Energy Accelerator Research Organization, Japan

Toshiya Ohtomo

High Energy Accelerator Research Organization, Japan

Taku Sato

Tohoku University, Japan

Hideki Seto

High Energy Accelerator Research Organization, Japan

Mitsuhiro Shibayama

University of Tokyo, Japan

Masaaki Sugiyama

Kyoto University, JapanJun Sugiyama

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

Wataru Utusmi

Japan Atomic Energy Agency, Japan

Toshio Yamaguchi

Fukuoka University, Japan9) Program Advisory Committee (PAC) for Nuclear and Particle Physics Experiments at the J-PARC 50GeV Proton
Synchrotron
Edward Blucher

University of Chicago, USA

Thomas Browder

University of Hawaii, USA

Akinobu DoteHigh Energy Accelerator Research Organization, Japan

Junji Haba

High Energy Accelerator Research Organization, Japan

Kenichi ImaiJapan Atomic Energy Agency, Japan

Kunio Inoue

Tohoku University, Japan

Gino Isidori

Frascati National Laboratories, Italy

Tadafumi Kishimoto

Osaka University, Japan

Konrad Kleinknecht

Mainz University, Germany

William C. Louis

Los Alamos National Laboratory, USA

Tomofumi Nagae

Kyoto University, Japan

Matthias Gross Perdekamp

University of Illinois, USA

Hiroyoshi Sakurai

University of Tokyo, Japan

Hajime Shimizu

Tohoku University, Japan

Wolfram Weise

Technische Universität München, Germany

Main Parameters

Main Parameters

J-PARC Annual Report 2012

68
Present main parameters of Accelerator
Linac
Acclerated. Particles
EnergyPeak Current
Pulse Width
Repetition Rate
Freq. of RFX, DTL, and SDTL

Negative hydrogen
181 MeV
15 mA
0.5 ms
25 Hz
324 MHzRCS

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

348.333 m
181 MeV
3 GeV
25 Hz
0.938 MHz → 1.67 MHz2
1124
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~0.3 Hz1.67 MHz → 1.72 MHz
9696

Key parameters of Materials and Life Science Experimental Facility
Injection Energy

3 GeV

Repetition Rate

25 Hz
Neutron Source

Target Material
Number of Moderators
Moderator Material
Moderator Temperature/Pressure
Number of Neutron Beam Ports

Mercury
3
Supercritical 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

11
5/3

Muon Instruments*
Open for User Program (General Use)(* as of March, 2013)2

Events

Events

J-PARC Annual Report 201270

EventsNew J-PARC Director Takes Over - Shoji Nagamiya Passes the Baton to Yujiro Ikeda(July 1)After 6 years at the helm of the J-PARC project, Dr.
Shoji Nagamiya formally retired in the end of June 2012.
In the process he handed the mantle of the J-PARC Center Director to Dr. Yujiro Ikeda, who was selected afteran extensive search. The new management team led by
Dr Ikeda took over the reins at J-PARC on July 1, keen to
take up the challenge of leading J-PARC into the future.

The former Director, Dr. Nagamiya (left) and the new Director,
Dr. Ikeda (right)

J-PARC Open House (July 29)
The first J-PARC open house after the earthquake in 2011 was held on July 29, 2012, and attracted 2,100 visitors. The
visitors had the chance to observe the three experimental facilities and the tunnel of the 50-GeV synchrotron accelerator,
where can be accessed during only summer shutdown of J-PARC. The visitors intently listened to researchers’ explanations
about the instruments used or the scientific studies performed at each facility (and in the demonstration areas, many kids,
who would be future scientists of J-PARC, were enjoying simple experiments using liquid nitrogen and electromagnets, etc.)

Materials and Life Science Experimental Facillity (MLF)

Electromagnets in the tunnel of the 50-GeV sinchrotron

J-PARC Annual Report 2012

Events71

Ceremony to Mark the Completion of a New Neutron Diffraction Device, SPICA (September 4)
The Special Environment Neutron Powder
Diffractometer (SPICA) for analyzing the internal
atomic structure and behavior in batteries was
installed on BL 09 at MLF and a celebration party
was held by KEK, NEDO and Kyoto University.
It has the highest time and space resolutions
and is expected to be a great tool to develop
batteries by understanding the processes thattake place inside of a battery. Furthermore, it isexpected to contribute to the development of a
new generation of batteries.

The ribbon-cutting ceremony at MLF

Ceremony to Mark the Completion of a New Neutron Diffraction Device, PLANET (September 27)
The ceremony to celebrate the completion of the
new neutron powder diffractometer, PLANET, at MLF
was held on September 27. It was attended by many ofthe people involved in this joint project of JAEA, Ehime
University and The University of Tokyo. PLANET, which
has been installed on BL11, is specifically designed to
study the physical properties of materials under extremely high temperature and pressure conditions (upto 2000°C and 20 GPa) such as those found in the earth
mantle. Because neutron scattering is particularly usefulin studying the distribution of water in a material, PLANET is expected to be a powerful tool for understanding
the geochemical cycle of water in the earth mantle.
Ceremony attendees

The 4th J-PARC MLF Symposium and the FY2011 Ibaraki-Beamline Progress Meeting(October 10-11)
The Symposium and the Meeting were held jointly at
the National Museum of Emerging Science and Innovation(KAGAKU MIRAIKAN) in Tokyo, Japan, on October 10-11. Approximately 200 participants attended. For two days, the results of experiments at MLF and the updated status of eachbeamline, including the development of new equipment,
were reported. In the last session, they also discussed the future plans to improve the experimental environment and user
accessibility. These meetings were hosted by J-PARC, Ibaraki
Prefecture, JAEA, KEK, IMSS and CROSS.
The joint meeting at KAGAKU MIRAIKAN in Tokyo

Events

J-PARC Annual Report 201272

1st J-PARC Colloquium (November 20)
The 1st J-PARC Colloquium was held at the Ibaraki Quantum BeamResearch Center on November 20, 2012. The invited speaker was Dr.
Guido Tonelli (Professor, University of Pisa, Italy), previously the leader of
CERN’s CMS (Compact Muon Solenoid) Experiment team. He gave an extremely interesting talk on the background of the discovery of the Higgs
boson, the only elementary particle predicted by the Standard Model ofparticle physics, which had yet to be found; the new scientific progress
due to the discovery of the Higgs boson, such as the elucidation of theorigin of mass and the mystery of the creation of the universe; and the
expectations for new physics going beyond the Standard Model.
Invited speaker, Dr. Guido Tonelli, professor at the University of Pisa

1st MLF School (December 18-21)
MLF at J-PARC conducts state-of-the-art experiments in materials and life science using world-class pulsed neutron andmuon instruments. In order to educate the next generation of researchers and improve the quality of science, we recently
held the 1st MLF School for inexperienced graduate students and young researchers with an interest in experiments using
neutron and muon beams. Twenty-four people participated as students.

Participants and instructors

SAT Technology Showcase 2013
(January 22)
The 12th SAT Technology Showcase 2013 was held
at Tsukuba International Congress Center by the Science Academy of Tsukuba (SAT) on January 22, 2013.
In the exhibition, researchers and engineers interacted
and presented their current research results, ideas, andtechniques. There were 86 poster presentations. J-PARC
displayed brochures, posters, DVDs, and exhibit panels
at its display booth.

The J-PARC booth at the science exhibition

J-PARC Annual Report 2012

Events73

International School for Strangeness Nuclear Physics 2013 (February 14-20)
From February 14 through 20, the Second International School for Strangeness Nuclear Physics (SNP School2013) was held at the J-PARC site and Tohoku University,with the participation of 40 students and young researchers from Japan and 30 from foreign countries. The firsthalf (Feb. 14-16) was held at the J-PARC site. First, lectures were held at the Ibaraki Quantum Beam ResearchCenter (IQBRC), and then the participants toured J-PARC
on the afternoon of the 15th. They visited MLF, Central
Control Room, Neutrino Experimental Facility and Hadron

Experimental Facility. Researchers active at each facility
provided detailed explanations, and the participants had
many questions. As an assignment, all participants wereasked to prepare beforehand posters about their own research topics. On the afternoon of the 16th, there were
presentations and a poster session by young researchers,
and a lively discussion on the benefits of attending theschool. On the 17th, everyone moved to Tohoku University, where the second half of the school (Feb. 18-20) was
held.

Listening to a lecture at IQBRC

Workshop on “Multi-purpose Use of the J-PARC Accelerator-Driven Transmutation
Experimental Facility” (March 18)
J-PARC plans to build the Accelerator-Driven System(ADS) Experimental Facility as the second phase of the
J-PARC project. On March 18, 2013, the workshop
was launched by Yujiro Ikeda (Director, J-PARC Center), who explained the main purpose of the gathering. He was followed by people affiliated with ADS,
who reported on the purpose and nature of their research, and provided an overview of the facility. An
experimental facility for multi-purpose use is being
considered; it will enable branched use of the proton beam from the accelerator injected into nuclear
spallation targets relating to ADS, and the use ofneutron beams from the nuclear spallation targets.
Four types of projected uses of this facility were presented by users. At the end of the workshop, thesepresenters held a lively discussion on the topic “TheNeed for Multi-purpose Use of Quantum Beams” andthe participants discussed the best approaches for implementing the multi-purpose use of facilities.

The workshop in Tokyo

Events

J-PARC Annual Report 201274

Visitors (2012)

Susan J. Seestrom, Chair of the United States Nuclear Science
Advisory Committee (Los Alamos National Laboratory) (August 16)

Shunichi Mizuoka, Assistant to the Prime Minister of Japan(September 20)

Tetsuhisa Shirakawa, President of Japan Synchrotron Radiation Research Institute (JASRI) (October 26)

Sydney Gales, Former director of Grand Accelerateur Nationald’Ions Lourds (GANIL) (October 26)

Shigeru Goto, Nuclear Systems Association (Former memberof the House of Representatives)

Dochai Chung, Science and Technology Policy Institute (STEPI)(January 25)

J-PARC Annual Report 2012

Events75

John Womersley, CEO of Science and Technology Facilities Council (STFC)
Peter Fletcher, Head of the International Office of STFC (February 24)

There were 3,816 visitors to J-PARC for the period from April 2012 to the end of March 2013.
In 2011 the number of the visitors decreased due to the Great East Japan Earthquake (March 11, 2011). However, in fiscal
year 2012, 3,816 people visited J-PARC, which was an increase of over 1,000 visitors compared to fiscal year 2011.

Public Offices

4% 5%Junior-high/High school
students, teachers
Business

20%

20%

Local residents
Media

1%

University students, experts
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11%
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18%

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Publications

Publications

J-PARC Annual Report 201278

Publications in Periodical Journals
A-001
Su, Y.H. et al.
Deformation-induced grain coalescence inan electrodeposited pure iron sheet studied
by in situ neutron diffraction and electronbackscatter diffraction
Acta Materialia, Vol 60, 3393 (2012)
A-002
Mizuguchi, M. et al.
Quaternary structure, aggregation andcytotoxicity of transthyretin
Amyloid, Vol 19, Suppl 1, 5 (2012)
A-003
Oigawa, H.
Reduction of burden for waste disposalby accelerator-driven transmutation
technology; Praparing for unforeseeable
future by nuclear fuel cycle for back-end
ATOMO , Vol 54, 315 (2012)
A-004
Ninomiya, K. et al.
Development of Nondestructive andQuantitative Elemental Analysis Method
Using Calibration Curve between Muonic
X-ray Intensity and Elemental Compositionin Bronze
Bulletin of the Chemical Society of Japan, Vol
85, 228 (2012)
A-005
Ueda, Y. et al.
Ferromagnetic Metal-Insulator Transition:
Peierls Mechanism for Spinless Fermions(Current Topics)
BUTSURI, Vol 67, 571 (2012)
A-006
Lee, S.C. et al.
Charge-order driven proton arrangement ina hydrogen-bonded charge-transfer complex
based on a pyridyl-substituted TTF derivative
Chemical Communications, Vol 48, 8673 (2012)

Oxides: Design Concept of Interstitial Ion
Conductors through the Higher-Valence d10
Dopant and Jahn–Teller EffectChemistry of Materials, Vol 24, 4100 (2012)

A-018
Arai, M.
Recovery from the Earthquake at MLF
Hamon, Vol 22, 216 (2012)

A-010
Takeda, M. et al.
Current Status of a New Polarized Neutron
Reflectometer at the Intense Pulsed Neutron
Source of the Materials and Life Science
Experimental Facility (MLF) of J-PARC
Chinese J. Phys., Vol 50, 161 (2012)

A-019
Futakawa, M.
Seismic Damages at MLF Neutron Source
Hamon, Vol 22, 228 (2012)

A-011
Jin, X. et al.
Tensile strain dependence of critical current
of RHQ-Nb3Al wires
Cryogenics, Vol 52, 805 (2012)
A-012
Shikama, T. et al.
Magnetism and Pressure-Induced
Superconductivity of Checkerboard-Type
Charge-Ordered Molecular Conductor
β-(meso-DMBEDT-TTF)2X (X = PF6 and AsF6)
Crystals, Vol 2, 1502 (2012)
A-013
Ohshima, Y. et al.
High-Temperature-Operating Dielectrics ofPerovskite Oxides
ECS Transactions, Vol 45, 195 (2012)
A-014
Idemoto, Y. et al.
Investigation on Crystal and Electronic
Structures of 0.5Li2MnO3-0.5LiMnxNixCo(1−2x)
O2 (x = 1/3, 5/12) Samples Heat-Treatedunder Vacuum Reducing
Electrochemistry, Vol 80, 791 (2012)
A-015
Ikeda, K. et al.
The Materials and Life Science Experimental
Facility of J-PARC /J-PARC の物質・生命科学実

A-020
Arimoto, Y. et al.
Development of Longitudinal-Gradient
Magnet for Time Focusing of Ultra-Cold
Neutron With Anisotropic Inter-PoleIEEE Trans. Appl. Supercond., Vol 22, 4500704(2012)
A-021
Takahashi, K. et al.
Prebending effect on three-dimensionalstrain in CuNb/(Nb, Ti)3Sn wires under atensile load
IEEE Trans. Appl. Supercond., Vol 22, 6000204(2012)
A-022
Takeda, M.
Structural analysis of interfaces in thin films
using neutron reflectometry
J of JIEP, Vol 15, 492 (2012)
A-023
Kadono, R. et al.
Quasi-One-Dimensional Spin Dynamics in
LiV2O4: One-to-Three-Dimensional Crossover
as a Possible Origin of Heavy Fermion StateJ Phys Soc Jpn, Vol 81, 014709 (2012)
A-024
Kawasaki, T. et al.
Structure of Morpholinium
Tribromoplumbate C4H8ONH2PbBr3 Studied
Using Single-Crystal Neutron Diffraction
J Phys Soc Jpn, Vol 81, 094602 (2012)

験施設

A-007
Han, J. et al.
Experimental visualization of lithium
conduction pathways in garnet-type
Li7La3Zr2O12
Chemical Communications, Vol 48, 9840 (2012)
A-008
Iiyama, T. et al.
Structure Determination of Hydrogenbonding Network of Water in Hydrophobic
Nanospace by Neutron and X-ray Diffractions
Chemistry Letters, Vol 41, 1267 (2012)
A-009
Yashima, M. et al.
Role of Ga3+ and Cu2+ in the High Interstitial
Oxide-Ion Diffusivity of Pr2NiO4-BasedEngineering Materials (Kogyo Zairyo), Vol 60,
28 (2012)
A-016
Kajimoto, R. et al.
Development of a High-efficient Inelastic
Neutron Scattering Method with
Multiple Incident Energies on a Chopper
Spectrometer
Hamon, Vol 22, 145 (2012)
A-017
Sato, H.
Quantitative Imaging of Crystalline Structural
Information by Pulsed Neutron Transmission
Hamon, Vol 22, 156 (2012)

A-025
Iwase, K. et al.
In situ lattice strain mapping during tensileloading using the neutron transmission anddiffraction methods
J. Appl. Cryst., Vol 45, 113 (2012)
A-026
Oishi-Tomiyasu, R. et al.
Application of matrix decomposition
algorithms for singular matrices to the
Pawley method in Z-Rietveld
J. Appl. Cryst., Vol 45, 299 (2012)
A-027
Iwase, H. et al.
Optimization of the thickness of a ZnS/6LiF
scintillator for a high-resolution detector

J-PARC Annual Report 2012

Publications

79
installed on a focusing small-angle neutron
scattering spectrometer (SANS-U)
J. Appl. Cryst., Vol 45, 507 (2012)
A-028
Takahashi, K. et al.
Axial and lateral lattice strain states under atensile load in as-reacted and prebent CuNb/
Nb3Sn wires using neutron diffraction
J. Appl. Phys., Vol 111, 043908 (2012)
A-029
Tomita, M. et al.
Non-destructive magneto-strain analysis of
YB2Cu3Oy superconducting magnets using
neutron diffraction in the time-of-flightmode
J. Appl. Phys., Vol 112, 063923 (2012)
A-030
Kasugai, Y. et al.
Fitting Method for Spectrum Deduction in
High-Energy Neutron Field Induced by GeVProtons Using Experimental Reaction-Rate
Data
J. ASTM Int., Vol 9, 675 (2012)
A-031
Nakamura, T. et al.
A wavelength-shifting-fibre-based
scintillator neutron detector implemented
with the median point calculation method
J. Instrum., Vol 7, C02003 (2012)
A-032
Toh, K. et al.
Improved micro-pixel detector element forneutron measurement under high pressure
J. Instrum., Vol 7, C01025 (2012)
A-033
Kitamura, N. et al.
Particle morphology, electrical conductivity,
crystal and electronic structures ofhydrothermally synthesized (Ce,Sr)PO4
J. Mater. Sci., Vol 47, 6220 (2012)
A-034
Naoe, T. et al.
Quantification of fatigue crack propagationof an austenitic stainless steel in mercury
embrittlement
J. Nucl. Mater., Vol 431, 133 (2012)
A-035
Kawai, M. et al.
Development of advanced materials forspallation neutron sources and radiation
damage simulation based on multi-scalemodelsJ. Nucl. Mater., Vol 431, 16 (2012)
A-036
Teshigawara, M. et al.
Development of invar joint for hydrogentransfer line in JSNS
J. Nucl. Mater., Vol 431, 212 (2012)

A-037
Ooi, M. et al.
Development status of low activation ternary
Au–In–Cd alloy decoupler for a MW classspallation neutron source: 1st Production of
Au–In–Cd alloy
J. Nucl. Mater., Vol 431, 218 (2012)
A-038
Kimura, A. et al.
Neutron-capture cross-sections of 244Cm
and 246Cm measured with an array of large
germanium detectors in the ANNRI at
J-PARC/MLF
J. Nucl. Sci. Technol., Vol 49, 708 (2012)
A-039
Hemmi, K. et al.
Cr- and Mo-Doping Effects on Structural andOrbital Order Phase Transition in Spinel-Type
MnV2O4
J. Phys. Soc. Jpn. , Vol 81, SB030 (2012)
A-040
Kaneko, K. et al.
Neutron Scattering Study on High-Quality
Single Crystals of Non-Centrosymmetric
Heavy-Fermion Superconductor CePt3Si
J. Phys. Soc. Jpn., Vol 81, SB006 (2012)
A-041
Takemori, A. et al.
Correlation between Tc and Transport
Properties in PrFeP1-xAsxO0.9F0.1
J. Phys. Soc. Jpn., Vol 81, SB043 (2012)
A-042
Ohishi, K. et al.
Magnetic Penetration Depth in the FeAsBased Superconductor KFe2As2
J. Phys. Soc. Jpn., Vol 81, SB046 (2012)
A-043
Ito, T.U. et al.
Microscopic Evidence for Long-Range
Magnetic Ordering in the Γ8 Ground Quartet
Systems SmTr2Al20 (Tr: Ti, V, Cr)
J. Phys. Soc. Jpn., Vol 81, SB050 (2012)
A-044
Kiyanagi, R. et al.
Structural and Magnetic Phase
Determination of (1-x) BiFeO3--xBaTiO3 Solid
Solution
J. Phys. Soc. Jpn., Vol 81, 4603 (2012)
A-045
Itoh, S. et al.
Anomalous Spin Diffusion on TwoDimensional Percolating Network in Dilute
Antiferromagnet Rb2Mn0. 6Mg0. 4F4
J. Phys. Soc. Jpn., Vol 81, 4704 (2012)
A-046
Itoh, S. et al.
Quantum Renormalization Effect in OneDimensional Heisenberg Antiferromagnets

J. Phys. Soc. Jpn., Vol 81, 4706 (2012)
A-047
Nakao, A. et al.
Observation of Structural Change in theNovel Ferromagnetic Metal--Insulator
Transition of K2Cr8O16
J. Phys. Soc. Jpn., Vol 81, 4710 (2012)
A-048
Kawamoto, T. et al.
Tc of 11 K Identified for the Third Polymorphof the (BEDT-TTF)2Ag(CF3)4(TCE) Organic
Superconductor
J. Phys. Soc. Jpn.,Vol 81, 023705 (2012)
A-049
Mito, T. et al.
Mechanism of Field Induced Fermi
Liquid State in Yb-Based Heavy-Fermion
Compound: X-ray Absorption Spectroscopy
and Nuclear Magnetic Resonance Studies of
YbCo2Zn20
J. Phys. Soc. Jpn., Vol 81, 033706 (2012)
A-050
Onodera, Y. et al.
Structural Evidence for High Ionic
Conductivity of Li7P3S11 Metastable Crystal
J. Phys. Soc. Jpn.,Vol 81, 044802 (2012)
A-051
Nakajima, S. et al.
Microscopic Phase Separation in TriangularLattice Quantum Spin Magnet κ-(BEDTTTF)2Cu2(CN)3 Probed by Muon Spin
Relaxation
J. Phys. Soc. Jpn.,Vol 81, 063706 (2012)
A-052
Iida, K. et al.
Two-dimensional incommensurate magnetic
fluctuations in Sr2(Ru0.99Ti0.01)O4
J. Phys. Soc. Jpn.,Vol 81, 124710 (2012)
A-053
Kinsho, M.
Status of J-PARC after the Great East Japan
Earthquake
J. Vac. Soc. Jpn.,Vol 55, 1 (2012)
A-054
Kamiya, J. et al.
Magnetic field shielding by vacuum
chambers of magnetic material for beam loss
reduction
J. Vac. Soc. Jpn.,Vol 55, 100 (2012)
A-055
Kamiya, J. et al.
Development of an in-situ bake-out method
for outgassing reduction of kicker ferrite
cores
J. Vac. Soc. Jpn.,Vol 55, 156 (2012)
A-056
Jin, X. et al.

Publications

J-PARC Annual Report 2012

80
Observation of A15 phase transformation
in RHQ-Nb3Al wire by neutron diffraction at
high-temperature
Journal of Alloys and Compounds, Vol 535, 124(2012)A-064
Su, C. et al.
Nucleosome-like Structure from DendrimerInduced DNA Compaction
Macromolecules, Vol 45, 5208 (2012)

A-057
Nyuta, K. et al.
Zwitterionic heterogemini surfactants
containing ammonium and carboxylate
headgroups 2: Aggregation behavior studied
by SANS, DLS, and cryo-TEM
Journal of Colloid and Interface Science, Vol
370, 80 (2012)

A-065
Iwase, H. et al.
Hierarchical Structure Analysis of Graft-Type
Polymer Electrolyte Membranes Consistingof Cross-Linked Polytetrafluoroethylene by
Small-Angle Scattering in a Wide-Q Range
Macromolecules, Vol 45, 9121 (2012)

A-058
Yokoyama, T. et al.
Hydrogen-bond network and pH sensitivity
in transthyretin: Neutron crystal structure ofhuman transthyretin
Journal of Structural Biology, Vol 177, 283(2012)
A-059
Ikeda, K. et al.
Structural Analysis of Hydrogen Storage
Materials by High Intensity Neutron Total
Diffractometer NOVA/ 高強度中性子全散乱装置
NOVA による水素貯蔵材料の構造解析
Journal of the Hydrogen Energy Systems
Society of Japan/ 水素エネルギーシステム Vol
37, 328 (2012)
A-060
Takeda, M. et al.
Small-Angle Neutron Scattering
Measurements of the Averaged Internal
Structures in Neodymium-Iron-Boron (NdFe-B) Sintered Magnets
Journal of the Japan Institute of Metals andMaterials, Vol 76, 165 (2012)
A-061
Idemoto, Y. et al.
Dependencies of Piezoelectric andFerroelectric Properties and Crystal Structure
on Synthesis and Sintering Processes in
BaTiO3 Prepared by Hydrothermal and Solidstate Methods
Journal of the Japan Society of Powder and
Powder Metallurgy, Vol 59, 101 (2012)
A-062
Kusano, T. et al.
Structural and Rheological Studies on
Growth of Salt-Free Wormlike Micelles
Formed by Star-Type Trimeric Surfactants
Langmuir, Vol 28, 16798 (2012)
A-063
Yoshimura, T. et al.
Star-Shaped Trimeric Quaternary Ammonium
Bromide Surfactants: Adsorption andAggregation Properties
Langmuir, Vol 28, 9322 (2012)

A-066
Hoshino, N. et al.
Three-way switching in a cyanide-bridged[CoFe] chain
Nat Chem, Vol 4, 921 (2012)
A-067
Isono, T. et al.
Hydrogen bond-promoted metallic state in apurely organic single-component conductor
under pressure
Nat Commun, Vol 4, 1344 (2013)
A-068
Fujiwara, T. et al.
Study on Ce:LiCAF scintillator for 3He
alternative detector
Neutron News, Vol 23, 31 (2012)
A-069
Itoh, S. et al.
Fermi chopper developed at KEK
Nucl. Instrum. Meth. A, Vol 661, 58 (2012)
A-070
Itoh, S. et al.
T0 chopper developed at KEK
Nucl. Instrum. Meth. A, Vol 661, 86 (2012)
A-071
Nomura, M. et al.
A convenient way to find an electricalinsulation break of MA cores in J-PARC
synchrotrons
Nucl. Instrum. Meth. A, Vol 668, 83 (2012)
A-072
Itoh, S. et al.
Large area window on vacuum chamber
surface for neutron scattering instruments
Nucl. Instrum. Meth. A, Vol 670, 1 (2012)
A-073
Ohshita, H. et al.
Stability of neutron beam monitor for HighIntensity Total Diffractometer at J-PARC
Nucl. Instrum. Meth. A, Vol 672, 75 (2012)
A-074
Tomiyasu, K. et al.
Modified cross-correlation for efficientwhite-beam inelastic neutron scattering
spectroscopy

Nucl. Instrum. Meth. A, Vol 677, 89 (2012)
A-075
Hayashi, N. et al.
Beam position monitor system of J-PARC RCS
Nucl. Instrum. Meth. A, Vol 677, 94 (2012)
A-076
Ohoyama, K. et al.
Development of a non-adiabatic two-coilspin flipper for a polarised thermal neutron
diffractometer with a 3He spin filter
Nucl. Instrum. Meth. A, Vol 680, 75 (2012)
A-077
Nakamura, T. et al.
A large-area two-dimensional scintillator
detector with a wavelength-shifting fibre
readout for a time-of-flight single-crystal
neutron diffractometer
Nucl. Instrum. Meth. A, Vol 686, 64 (2012)
A-078
Arimoto, Y. et al.
Demonstration of focusing by a neutron
accelerator
Phys. Rev. A, Vol 86, 023843 (2012)
A-079
Murai, N. et al.
Effect of out-of-plane disorder onsuperconducting gap anisotropy in Bi2+xSr2−
xCaCu2O8+δ as seen via Raman spectroscopy
Phys. Rev. B, Vol 85, 020507 (2012)
A-080
Sugiyama, J. et al.
Diffusive behavior in LiMPO4 with M=Fe, Co,
Ni probed by muon-spin relaxation
Phys. Rev. B, Vol 85, 054111 (2012)
A-081
Hirata, Y. et al.
Correlation between the interlayer
Josephson coupling strength and anenhanced superconducting transition
temperature of multilayer cuprate
superconductors
Phys. Rev. B, Vol 85, 054501 (2012)
A-082
Nambu, Y. et al.
Block magnetism coupled with local
distortion in the iron-based spin-laddercompound BaFe2Se3
Phys. Rev. B, Vol 85, 064413 (2012)
A-083
Burkovsky, R.G. et al.
Diffuse scattering anisotropy andinhomogeneous lattice deformations in thelead magnoniobate relaxor PMN above theBurns temperature
Phys. Rev. B, Vol 85, 094108 (2012)
A-084
Ishii, K. et al.

J-PARC Annual Report 2012

Publications

81
Electronic excitations around the substituted
atom in La2Cu1-yNiyO4 as seen via resonant
inelastic x-ray scattering
Phys. Rev. B, Vol 85, 104509 (2012)
A-085
Onishi, N. et al.
Magnetic ground state of the frustrated
honeycomb lattice antiferromagnet
Bi3Mn4O12(NO3)
Phys. Rev. B, Vol 85, 184412 (2012)
A-086
Higemoto, W. et al.
Multipole and superconducting state in
PrIr2Zn20 probed by muon spin relaxation
Phys. Rev. B, Vol 85, 235152 (2012)
A-087
Iida, K. et al.
Determination of spin Hamiltonian in the Ni4magnetic molecule
Phys. Rev. B, Vol 86, 064422 (2012)
A-088
Jarrige, I. et al.
Resonant inelastic x-ray scattering study ofcharge excitations in superconducting andnonsuperconducting PrFeAsO1-y
Phys. Rev. B, Vol 86, 115104 (2012)
A-089
Kawasaki, Y. et al.
μSR investigation of magnetically orderedstates in the A-site ordered perovskite
manganites RBaMn2O6 (R=Y and La)
Phys. Rev. B, Vol 86, 125141 (2012)
A-090
Matsuura, M. et al.
Ni-substitution effects on the spin dynamics
and superconductivity in La1.85S0.15CuO4
Phys. Rev. B, Vol 86, 134529 (2012)
A-091
Jeong, J. et al.
Spin Wave Measurements over the Full
Brillouin Zone of Multiferroic BiFeO3
Phys. Rev. Lett., Vol 108, 077202 (2012)
A-092
Machida, A. et al.
Formation of NaCl-type monodeuteride LaD
by the disproportionation reaction of LaD2
Phys. Rev. Lett., Vol 108, 205501 (2012)
A-093
Iida, K. et al.
Coexisting Order and Disorder Hidden in a
Quasi-Two-Dimensional Frustrated Magnet
Phys. Rev. Lett., Vol 108, 217207 (2012)
A-094
Shirotori, K. et al.
Search for the Θ+ Pentaquark via the π-p→K-X
Reaction at 1.92 GeV/c
Phys. Rev. Lett., Vol 109, 132002 (2012)

A-095
Nakano, T. et al.
Direct Observation by Neutron Diffractionof Antiferromagnetic Ordering in s Electrons
Confined in Regular Nanospace of Sodalite
Phys. Rev. Lett., Vol 109, 167208 (2012)
A-096
Raymond, S. et al.
Evidence for Three Fluctuation Channels in
the Spin Resonance of the Unconventional
Superconductor CeCoIn5
Phys. Rev. Lett., Vol 109, 237210 (2012)
A-097
Ao, H. et al.
First high-power model of the annular-ring
coupled structure for use in the Japan Proton
Accelerator Research Complex linac
Phys. Rev. ST Accel. Beams, Vol 15, 011001(2012)
A-098
Hotchi, H. et al.
Beam loss reduction by injection painting inthe 3-GeV rapid cycling synchrotron of theJapan Proton Accelerator Research Complex
Phys. Rev. ST Accel. Beams, Vol 15, 040402(2012)
A-099
Takeda, M. et al.
Polarized neutron reflectometer SHARAKU(BL17) at J-PARC
SHIKI, Vol 16, (2012)
A-100
Izumi, A. et al.
Structural analysis of cured phenolic resinsusing complementary small-angle neutron
and X-ray scattering and scanning electron
microscopy
Soft Matter, Vol 8, 8438 (2012)
A-101
Sato, M. et al.
On the superconducting pairing mechanismof Fe-based systems—Is it new or wellknown ?
Solid State Communications, Vol 152, 688(2012)
A-102
Matsuo, Y. et al.
Scaling of superionic transition temperaturein M3D(XO4)2
Solid State Ionics, Vol 225, 40 (2012)
A-103
Takahashi, K. et al.
Strain measurements by neutron diffraction
on Nb3 Sn cable with stainless steel
reinforcement strands
Superconductor Science and Technology, Vol
25, 054001 (2012)

A-104
Jin, X. et al.
Residual strain dependence on the matrix
structure in RHQ-Nb3 Al wires by neutron
diffraction measurement
Superconductor Science and Technology, Vol
25, 065021 (2012)
A-105
Morooka, S. et al.
Quantitative Analysis of Tensile Deformation
Behavior by In-Situ Neutron Diffraction for
Ferrite-Martensite Type Dual-Phase Steels
Tetsu-to-Hagane, Vol 98, 311 (2012)
A-106
Kameda, Y.
Neutron diffractometer in J-PARC
The Japan Association of Solution ChemistryNews Letter, Vol 65, 1 (2012)
A-107
Yamazaki, T. et al.
Analysis of buried heterointerfacial hydrogenin highly lattice-mismatched epitaxy on
siliconThin Solid Films, Vol 520, 3300 (2012)
A-108
Saito, Y. et al.
Material and surface processing in J-PARC
vacuum system
Vacuum, Vol 86, 817 (2012)
A-109
Ogiwara, N. et al.
A Pirani gauge in a high-intensity proton
accelerator
Vacuum, Vol 86, 908 (2012)

Publications

J-PARC Annual Report 201282

Conference Reports and Books
C-001
Shiotsu, M. et al.
Transient heat transfer from a horizontal flat
plate in a pool of liquid hydrogen
AIP Conf. Proc., Vol 1434, 1059 (2012)
C-002
Shirai, Y. et al.
DNB heat flux in forced flow of subcooled
liquid hydrogen under pressures
AIP Conf. Proc., Vol 1434, 1067 (2012)
C-003
Tatsumoto, H. et al.
Design of a compact type cryogenic
accumulator to mitigate a pressure
fluctuation caused by a sudden KW-orderheat load
AIP Conf. Proc., Vol 1434, 368 (2012)
C-004
Tatsumoto, H. et al.
Dynamic behavior of the cryogenic hydrogensystem using only a heater control
AIP Conf. Proc., Vol 1434, 391 (2012)

C-011
Tamura, I. et al.
Current status of a time-of-flight single
crystal neutron diffractometer SENJU at
J-PARCJ. Phys.; Conf. ser., Vol 340, 012040 (2012)
C-012
Onodera, Y. et al.
Reverse Monte Carlo modeling of Li2 S-P2 S5superionic conductors
J. Phys.; Conf. ser., Vol 340, 012058 (2012)
C-013
Hase, M. et al.
Neutron scattering studies of the spin-5/2
antiferromagnetic linear trimer substance
SrMn3P4O14
J. Phys.; Conf. ser., Vol 340, 012066 (2012)
C-014
Shamoto, S. et al.
Dynamical Spin Susceptibility Studied by
Inelastic Neutron Scattering on LaFeAsO1−x F
x

J. Phys.; Conf. ser., Vol 340, 012075 (2012)
C-005
Tatsumoto, H. et al.
Forced convection heat transfer of subcooled
liquid hydrogen in horizontal tubes
AIP Conf. Proc., Vol 1434, 747 (2012)
C-006
Takashi, I. et al.
A compact SEOP 3He neutron spin filter with
AFP NMRJ. Phys.; Conf. ser., Vol 340, 012006 (2012)
C-007
Kiyanagi, Y. et al.
A new imaging method using pulsed
neutron sources for visualizing structural anddynamical information
J. Phys.; Conf. ser., Vol 340, 012010 (2012)
C-008
Nagano, M. et al.
High-precision figured thin supermirror
substrates for multiple neutron focusing
deviceJ. Phys.; Conf. ser., Vol 340, 012016 (2012)
C-009
Nagano, M. et al.
One-dimensional neutron focusing withlarge beam divergence by 400mm-longelliptical supermirror
J. Phys.; Conf. ser., Vol 340, 012034 (2012)
C-010
Sakai, K. et al.
Development of polarized Xe gas target forneutron experiment at J-PARC
J. Phys.; Conf. ser., Vol 340, 012037 (2012)

C-015
Shimakura, H. et al.
Quasi-elastic neutron scattering of dense
molecular liquid selenium bromide
J. Phys.; Conf. ser., Vol 340, 012080 (2012)
C-016
Kambe, S. et al.
Correlation between the superconducting
pairing symmetry and magnetic
anisotropy in f -electron unconventional
superconductors
J. Phys.; Conf. ser., Vol 344, 012003 (2012)

Effect of magnetic field in heavy-fermion
compound YbCo2Zn20
J. Phys.; Conf. ser., Vol 391, 012026 (2012)
C-021
Matsubayashi, K. et al.
Low temperature properties of a low carrier
heavy fermion YbPtSb
J. Phys.; Conf. ser., Vol 391, 012040 (2012)
C-022
Yano, S. et al.
Magnetic excitations in MnPJ. Phys.; Conf. ser., Vol 391, 012113 (2012)
C-023
Kobayashi, Y. et al.
NMR Studies on Iron Pnictide
Superconductors of LaFeAsO0.89 F0.11 and CaFe-Pt-As
J. Phys.; Conf. ser., Vol 400, 022056 (2012)
C-024
Kazuki, O. et al.
Flux-line lattice state in FeAs-based
superconductor KFe2 As2J. Phys.; Conf. ser., Vol 400, 022087 (2012)
C-025
Sato, M. et al.
Impurity effects on the superconducting
transition temperatures of Fe pnictides andsuperconducting symmetry of the orderparameter
J. Phys.; Conf. ser., Vol 400, 022104 (2012)
C-026
Sato, M. et al.
Study of magnetic excitation spectra ofseveral Fe-pnictide systems
J. Phys.; Conf. ser., Vol 400, 022105 (2012)

C-017
Okuchi, T. et al.
Neutron powder diffraction of small-volume
samples at high pressure using compact
opposed-anvil cells and focused beam
J. Phys.; Conf. ser., Vol 377, 012013 (2012)

C-027
Itoh, S. et al.
Two-Dimensional Antiferromagnetic
Fractons in Rb2Mn0.598Mg0.402F4
J. Phys.; Conf. ser., Vol 400, 032030 (2012)

C-018
Hirayama, T. et al.
Pressure-induced Suppression of the
Antiferromagnetic Transition in YbNi3Al9Single Crystal
J. Phys.; Conf. ser., Vol 391, 012020 (2012)

C-028
Kajimoto, R. et al.
Neutron scattering study of Ag, Mg andAl substitution effects on the magnetic
excitations in CuCrO2
J. Phys.; Conf. ser., Vol 400, 032034 (2012)

C-019
Iwasa, K. et al.
Neutron scattering study on magnetic
ordering in a partially rare-earth filled
skutterudite PrxFe4Sb12
J. Phys.; Conf. ser., Vol 391, 012025 (2012)

C-029
Okuda, T. et al.
Substitution Effect on the Magnetic Stateof Delafossite CuCrO2 Having a Spin-3/2
Antiferromagnetic Triangular SublatticeJ. Phys.; Conf. ser., Vol 400, 032072 (2012)

C-020
Kaneko, K. et al.

C-030
Yokoo, T. et al.

J-PARC Annual Report 2012

Publications

83
Magnetic excitations in possible spin-Peierls
system TiOBr
J. Phys.; Conf. ser., Vol 400, 032123 (2012)
C-031
Sugiyama, J. et al.
Lithium Diffusion in Lithium-Transition-Metal
Oxides Detected by μ+SR
Physics Procedia, Vol 30, 105 (2012)
C-032
Adiperdana, B. et al.
Muon Sites Estimation in La2Cu04 and A
New Vanadium Cluster Compound, V4S9Br4,
using Electronic and Nuclear Dipole Field
Calculations
Physics Procedia, Vol 30, 109 (2012)
C-033
Chow, K.H. et al.
μSR Investigation of the Hollandite Vanadate
K2V8O16
Physics Procedia, Vol 30, 117 (2012)
C-034
Higemoto, W. et al.
μSR Studies on Caged Compound PrIr2Zn20
Physics Procedia, Vol 30, 125 (2012)
C-035
Sugiyama, J. et al.
Magnetic and Diffusive Nature of LiFePO4
Physics Procedia, Vol 30, 190 (2012)
C-036
Wikberg, J.M. et al.
Magnetic Order and Frustrated Dynamics in
Li (Ni0.8Co0.1Mn0.1)O2: A Study by μ+SR andSQUID Magnetometry
Physics Procedia, Vol 30, 202 (2012)
C-037
Shimomura, K. et al.
Photo Detachment of Negatively Charged
Muonium in GaAs by Laser Irradiation
Physics Procedia, Vol 30, 224 (2012)
C-038
Yokoyama, K. et al.
Detection of Conduction Electron Spin
Polarization in n-GaAs by Negative Muonium
Physics Procedia, Vol 30, 231 (2012)
C-039
Sugiyama, J. et al.
Successive Magnetic Transitions in RECoAsO
Physics Procedia, Vol 30, 262 (2012)
C-040
Higemoto, W. et al.
Muon Beam Slicer at J-PARC MUSE
Physics Procedia, Vol 30, 30 (2012)
C-041
Ikedo, Y. et al.
Status of the Superomega Muon Beam Lineat J-PARC

Physics Procedia, Vol 30, 34 (2012)
C-042
Miyake, Y. et al.
J-PARC Muon Facility, MUSE
Physics Procedia, Vol 30, 46 (2012)
C-043
Strasser, P. et al.
New Muon Kicker System for the Decay
Muon Beamline at J-PARC
Physics Procedia, Vol 30, 65 (2012)
C-044
Makimura, S. et al.
Development of a Muon Rotating Target for
J-PARC/MUSE
Physics Procedia, Vol 32, 795 (2012)
C-045
Futakawa, M.
Present status of JSNS and R&D for highpower operation in JPARC
Proc of ICANS-XX, Vol 111, (2012)
C-046
Sakai, K. et al.
Influence of Great East Japan Earthquake on
Neutron Target Station in J-PARC
Proc of ICANS-XX, Vol 113, (2012)
C-047
Meigo, S. et al.
Development of Beam Flattening System
Using Non-Linear Beam Optics at J-PARC
Proc of ICANS-XX, Vol 207, (2012)
C-048
Haga, K. et al.
Development of the high power mercury
target and the bubbler installation
Proc of ICANS-XX, Vol 307, (2012)
C-049
Meigo, S. et al.
Beam Commissioning at J-PARC/JSNS and
MUSE
Proc of ICANS-XX, Vol 314, (2012)
C-050
Riemer, B.W. et al.
Demonstration of Small Gas Bubbles for
Mitigation of Cavitation Damage andPressure Waves in Short-pulse Mercury
Spallation Targets
Proc of ICANS-XX, Vol 320, (2012)
C-051
Teshigawara, M. et al.
R&D on 2nd moderator fabrication for JSNS
Proc of ICANS-XX, Vol 326, (2012)
C-052
Kinoshita, H. et al.
Development of cut out machine for PIE test
pieces from mercury target vessel in J-PARC
Proc of ICANS-XX, Vol 334, (2012)

C-053
Wakui, T. et al.
First trial for post irradiation examination on
the JSNS target
Proc of ICANS-XX, Vol 353, (2012)
C-054
Ooi, M. et al.
Elemental distribution measurement of
the Au-In-Cd alloy by neutron resonanceimaging
Proc of ICANS-XX, Vol 439, (2012)
C-055
Vishik, I.M. et al.
Phase competition in trisectedsuperconducting dome
Proc. of the National Academy of Sciences, Vol
109, 18332 (2012)
C-056
Meigo, S. et al.
Development of Beam Flattening System
Using Non-Linear Beam Optics at J-PARC/
JSNS
Proc of 9th Meeting of Particle Accelerator
Society of Japan, 75 (2012)
C-057
Maruta, T. et al.
Simulation study on the longitudinal bunchshape measurement by RF chopper at
J-PARC linac
Proc. of 26th Int. Linear Accelerator Conf. (LINAC
2012) 395 (2012)
C-058
Kamiya, J. et al.
Status of the vacuum system in J-PARC RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 2522 (2012)
C-059
Takayanagi, T. et al.
New power supply of the injection bumpmagnet for upgrading the injection energy
in the J-PARC 3-GeV RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 3626 (2012)
C-060
Watanabe, M. et al.
Operation and current status of injection,
extraction, kicker magnet and the power
supply for J-PARC 3 GeV RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 3629 (2012)
C-061
Yamamoto, K. et al.
Comparison of the residual doses before andafter resumption of user operation in J-PARC
RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 3901 (2012)

Publications

J-PARC Annual Report 2012

84
C-062
Kinsho, M.
Status of the J-PARC 3 GeV RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 3927 (2012)
C-063
Ogiwara, N. et al.
Reduction of outgassing from the ferrite
cores in the kicker magnet of J-PARC RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 487 (2012)of RF-cavities of J-PARC 3 GeV synchrotron
and diameter change over the years
Proc. of 9th Annual Meeting of Particle
Accelerator Society of Japan 1143 (2012)
C-072
Schnase, A. et al.
Iterative Kappa magnet pole shape
optimization for MA core annealing
Proc. of 9th Annual Meeting of Particle
Accelerator Society of Japan, 1204 (2012)

C-064
Harada, H. et al.
Upgrade of Ionization Profile Monitor (IPM)
in the J-PARC 3-GeV RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 840 (2012)

C-073
Togashi, T. et al.
Operation maintenance of the thyratron forthe power supply of the extraction kicker
magnet in the J-PARC 3GeV RCS
Proc. of 9th Annual Meeting of Particle
Accelerator Society of Japan, 471 (2012)

C-065
Hatakeyama, S.
Various methods to measure the betatrontune of the synchrotron
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12) 843 (2012)

C-074
Watanabe, Y. et al.
Design of a high-precision and wide dynamic
range pulsed magnet power supply
Proc. of 9th Annual Meeting of Particle
Accelerator Society of Japan, 531 (2012)

C-066
Ikegami, M. et al.
Beam start-up of J-PARC linac after the
Tohoku Earthquake
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12), 3293 (2012)

C-075
Tamura, F. et al.
Commissioning of multiharmonic
feedforward system for J-PARC MR
Proc. of 9th Annual Meeting of Particle
Accelerator Society of Japan, 89 (2012)

C-067
Hocchi, H. et al.
Beam halo reduction in the J-PARC 3-GeV
RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12), 3918 (2012)

C-076
Tatsumoto, H. et al.
Effect of a Heated Pipe Length on DNB Heat
Flux in Forced Flow of Liquid Hydrogen
Proc. of ICEC24-ICMC2012, 157 (2012)

C-068
Hayashi, N. et al.
Status of injection energy upgrade for
J-PARC RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12), 3921 (2012)
C-069
Saha, P.K. et al.
Effect of the 2011 Great East Japan
Earthquake in the injection and extraction of
the J-PARC 3-GeV RCS
Proc. of 3rd Int. Particle Accelerator Conf. (IPAC‘12), 490 (2012)
C-070
Maruta, T. et al.
Longitudinal beam diagnosis with RF
chopper system
Proc. of 52nd ICFA Advanced Beam Dynamics
Workshop on High-Intensity and HighBrightness Hadron Beams (HB 2012), 591 (2012)
C-071
Shimada, T. et al.
Measurement of inner diameters of MA cores

C-077
Shiotsu, M. et al.
Heat Transfer Characteristic Test ofForced Flow Supercritical Hydrogen for
Superconductor CoolingProc. of ICEC24-ICMC2012, 165 (2012)
C-078
Hikawa, K. et al.
Over-Current Characteristics of MgB2 Wire
Cooled by Liquid Hydrogen
Proc. of ICEC24-ICMC2012, 203 (2012)

C-081
Nakamura, T. et al.
Development of Two-Dimensional
Scintillation Detectors for Neutron Spin Echo
Spectrometers in J-PARC/MLF
Proc. Of the 2012 IEEE Nuclear Science Sympo,
222 (2012)
C-082
Sakasai, K. et al.
Storage Characteristics of Mixtures of
KCl:Eu2+ Phosphors and Polyethylene Powder
by Irradiation of Fast Neutrons
Proc. Of the 2012 IEEE Nuclear Science Sympo,
318 (2012)
C-083
Saha, P.K. et al.
Effect of the 2011 Great East Japan
Earthquake in the injection and extraction of
the J-PARC 3-GeV RCS
Proc.s of 3rd International Particle Accelerator
Conference (IPAC ‘12) 490 (2012)
C-084
Meigo, S. et al.
Development of profile monitor system forhigh intense spallation neutron source
Proc.s of IBIC2012, 227 (2012)
C-085
Yoshimoto, M. et al.
Development of the beam halo monitor in
the J-PARC 3-GeV RCS
Proc.s of IPAC2012, 2122 (2012)
C-086
Futakawa, M. et al.
Cavitation erosion induced by proton beam
bombarding mercury target for high power
spallation neutron source
Proc.s of the 8th International Symposium on
Cavitation (CAV2012), 822 (2012)
C-087
Matsumura, H. et al.
Colloid Formation Rates of Radionuclides
Produced from Cu Foils in Waterbombarded
with 120-GeV Protons
Progress in Nuclear Science and Technology,
Vol 3, 127 (2012)

C-079
Murakami, K. et al.
Preliminary Test of Hot-Wire Type Flow-Meter
for Liquid Hydrogen
Proc. of ICEC24-ICMC2012, 51 (2012)

C-088
Yashima, H. et al.
Spatial Distribution Measurement of
Neutrons Produced by 120-GeV Proton Beamin Concrete Shield
Progress in Nuclear Science and Technology,
Vol 3, 4 (2012)

C-080
Toh, K.
Development of Gas-Based 2-Dimensional
Neutron Detector with Individual Line
Readout and Optical Signal Transmission
System
Proc. Of the 2012 IEEE Nuclear Science Sympo,
153 (2012)

C-089
Arimoto, Y. et al.
Present status of neutron fundamental
physics at J-PARC
Progress of Theoretical and Experimental
Physics, 02B007, (2012)

J-PARC Annual Report 2012

Publications

85
C-090
Hotchi, H. et al.
Beam commissioning and operation of theJapan Proton Accelerator Research Complex
3-GeV rapid cycling synchrotron
Progress of Theoretical and Experimental
Physics, Vol 2012, 02B003 (2012)
C-091
Oigawa, H.
Present status and prospect of transmutation
technology for high-level radioactive waste
Radioisotopes, Vol 61, 571 (2012)
C-092
Kadono, R. et al.
MUSE, the goddess of muons, and her future
Reports on Progress in Physics, Vol 75, 026302(2012)
C-093
Morooka, S. et al.
In-Situ Neutron Diffraction Study on Tensile
Deformaiton Behavior of Steels
New Methods of Damage and Failure Analysisof Structural Parts, ed. by Zdeněk Bůžek,Bohumír Strnadel

Publications

J-PARC Annual Report 2012

86

JAEA Reports
J-001
Nakamura, S. et al.
Neutron capture cross section of
palladium-107 in the thermal-neutronenergy region
JAEA-Conf 2012-001, Vol 147 (2012)

J-004
Division, N.S.S.M.a.L.S.
Technical design report of spallation neutron
source facility in J-PARC
JAEA-Technology 2010-030, Vol 2011-035, 536(2012)

J-007
Teshigawara, M. et al.
Maintenance of used components
in spallation neutron source;
Moderator$$cdot$$reflector and proton
beam window
JAEA-Technology 2012-024, Vol 303 (2012)

J-002
Yamagishi, H. et al.
A Low Noise ASIC for Two Dimensional
Neutron Gas Detector with Performance ofHigh Spatial Resolution (Contract Research)
JAEA-research, Vol 2011, 1 (2012)

J-005
Ishikawa, H. et al.
Development of information security andvulnerability risk management system for
J-PARCJAEA-Technology 2011-030, Vol (2012)

J-003
Sugawara, T.
Proceedings of the Int. Symposium on Futureof Accelerator-Driven System
JAEA-Review 2012-043, Vol (2012)

J-006
Sakai, K. et al.
Influence of Great East Japan Earthquake onneutron source station in J-PARC
JAEA-Technology 2011-039, Vol (2012)

Vol (2012)

Radiation-Resistant Magnets for the Neutrino
Beamline at J-PARC
IEEE Transactions on Applied Superconductivity,
Vol 22, 4101404 (2012)

New Secondary Beam Extraction at J-PARC
Hadron Facility
IEEE Transactions on Applied Superconductivity,
Vol 22, 4101504 (2012)

K-007
Charrier, J. et al.
In-Line Control in T2K Proton Beam Line
Magnet Safety System
IEEE Transactions on Applied Superconductivity,
Vol 22, 4702104 (2012)

K-012
Shiomi, K. et al.
Measurement of K0L flux at the J-PARC
neutral-kaon beam line
Nuclear Instruments and Methods in Physics
Research A, Vol 664, 264 (2012)

K-008
Abe, K. et al.
Measurements of the T2K neutrino beam
properties using the INGRID on-axis neardetector
Nuclear Instruments and Methods in Physics
Research A, Vol 694, 211 (2012)

K-013
Honda, R. et al.
Development of a tracking detector systemwith multichannel scintillation fibers and
PPD
Nuclear Instruments and Methods in Physics
Research A, Vol 695, 206 (2012)

K-009
Kobayashi, T. et al.
Status of T2K experiment
Nuclear Physics B (Proc. Suppl.), Vol 229, 55(2012)

K-014
Komatsubara, T. et al.
Experiments with K-meson decays
Progress in Particle and Nuclear Physics, Vol 67,
995 (2012)

K-010
Tanaka, K. et al.
Radiation-Resistant Magnet System for JPARC Hadron Experimental HallIEEE Transactions on Applied Superconductivity,
Vol 22, 4100204 (2012)

K-015
Miwa, K. et al.
Experimental plan of Σ p scatterings at JPARC
EPJ Web of Conferences, Vol 20, 5001 (2012)

J-008
Nakamura, T.
中性子を光に変えて高位置分解能で検出する-J-PARC の結晶構造解析装置用２次元シンチレー
タ中性子検出器を開発 未来を拓く原子力 原子力機構の研究開発成果 2012,

KEK Reports
K-001
Nagamiya, S. et al.
J-PARC project and its science
Progress in Particle and Nuclear Physics, Vol 67,580 (2012)
K-002
Sasaki, K. et al.
Development of a Superconducting Solenoid for Hyperfine Structure Measurementof Muonium at the J-PARC
IEEE Transactions on Applied Superconductivity,
Vol 22, 4500904 (2012)
K-003
Ueno, K. et al.
Conceptual Design of a Radial Vane Silicon
Tracker for a New Measurement of the Muon
Anomalous Magnetic Moment g-2 and Electric Dipole Moment at J-PARC
IEEE Nuclear Science Symposium Conference
Record, Vol 2012, 1353 (2012)
K-004
Ikegami, M. et al.
A Preliminary Consideration on Higher Frequency Option for Muon Drift Tube Linac
KEK_Internal, Vol 2012, 1 (2013)
K-005
Ikegami, M. et al.
A Preliminary Design Study on Ramped Drift
Tube Linac for the Muon g-2 Experiment
KEK_Internal, Vol 2012, 1 (2013)
K-006
Hirose, E. et al.

K-011
Takahashi, H. et al.
Indirectly Cooled Radiation-Resistant Magnet With Slanting Saddle Shape Coils for

K-016
Shirakabe, Y. et al.
SIMPLIFIED ANALYTICAL APPROACH TO THE
BEAM RIPPLE GENERATION MECHANISM OF
THE J-PARC MR SLOW EXTRACTION BEAM

J-PARC Annual Report 2012

Publications

87
Proc. Ann. Mtg Part. Accel. Soc. Jpn, Vol 2012,
541 (2012)
K-017
Sato, Y. et al.
DEVELOPMENT OF NON-CONTACT BEAM
INTENSITY MONITOR BY RESIDUAL GASIONIZATION
Proc. Ann. Mtg Part. Accel. Soc. Jpn, Vol 2012,
612 (2012)
K-018
Toyoda, A. et al.
Performance Evaluation of π/K Differential
Fitch-type Cherenkov Counter for the JPARC K1.1BR Beamline
Proc. Ann. Mtg Part. Accel. Soc. Jpn, Vol 2012,
620 (2012)
K-019
Yamanoi, Y. et al.
Operation status of water-cooling fixed
target at J-PARC Hadron Facility
Proc. Ann. Mtg Part. Accel. Soc. Jpn, Vol 2012,
1340 (2012)
K-020
Igarashi, Y. et al.
Waveform sampler module for J-PARC
TREK experimentIEEE Nuclear Science Symposium Conference
Record, Vol 2012, 1376 (2012)
K-021
Komatsubara, T. et al.
Experiments with K-Meson Decays
KEK_Preprint, Vol 2012, 1 (2013)
K-022
Takahashi, H. et al.
Radiation-Resistant Equipments for J-PARC
Hadron Beam Line
Kasokuki ( 日本加速器学会誌 ), Vol 9, 214 (2012)
K-023
Shirotori, K. et al.
Search for the Θ+ pentaquark via the
π-p → K-X reaction at 1.92 GeV/c
Phys. Rev. Lett., Vol 109, 132002 (2012)
K-024
Agari, K. et al.
Primary proton beam line at the J-PARC
hadron experimental facility
Prog. Theor. Exp. Phys., Vol 1, 8 (2012)
K-025
Agari, K. et al.
Secondary charged beam lines at the JPARC hadron experimental hall
Prog. Theor. Exp. Phys., Vol 1, 9 (2012)
K-026
Takahashi, T. et al.
Beam and SKS spectrometers at the K1.8
beam line
Prog. Theor. Exp. Phys., Vol 1, 10 (2012)

K-027
Agari, K. et al.
The K1.8BR spectrometer system at J-PARC
Prog. Theor. Exp. Phys., Vol 1, 11 (2012)
K-028
Naruki, M.
Hadron physics at J-PARC
Prog. Theor. Exp. Phys., Vol 1, 13 (2012)
K-029
Tamura, H.
Strangeness nuclear physics experiments
at J-PARC
Prog. Theor. Exp. Phys., Vol 1, 12 (2012)
K-030
Sekiguchi, T.
Neutrino facility and neutrino physics in JPARC
Prog. Theor. Exp. Phys., Vol 1, 5 (2012)
K-031
Yamanaka, T. and for the KOTO Collaboration
The J-PARC KOTO experimentProg. Theor. Exp. Phys., Vol 1, 6 (2012)
K-032
Iio, M. et al.
Development of liquid 3He target forexperimental studies of antikaon-nucleon
interaction at J-PARC
Nucl. Instr. and Meth. A, Vol 687, 1 (2012)
K-033
Amaudruz, P.-A. et al.
The T2K fine-grained detectors
Nucl. Instr. and Meth. A, Vol 696, 1 (2012)
K-034
Aoki, S. et al.
The T2K Side Muon Range Detector (SMRD)
Nucl. Instr. and Meth. A, Vol 698, 135 (2013)
K-035
Bhadra, S. et al.
Optical transition radiation monitor for theT2K experiment
Nucl. Instr. and Meth. A, Vol 703, 45 (2013)
K-036
Assylbekov, S. et al.
The T2K ND280 off-axis pi-zero detector
Nucl. Instr. and Meth. A, Vol 686, 48 (2012)
K-037
Abe, K. et al (T2K Collaboration)
T2K neutrino flux prediction
Phys. Rev. D, Vol 87, 68103 (2013)
K-038
Ichikawa, A.K.
Design concept of the magnetic hornsystem for the T2K neutrino beam
Nucl. Instr. and Meth. A, Vol 690, 27 (2012)

J-PARC

JAPAN PROTON A CCELERATOR RESEARCH C OMPLEXHigh Energy Accelerator Research Organization (KEK)
Japan Atomic Energy Agency (JAEA)

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J-PARCJR Joban L ine

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Ueno
Tokyo

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http://j-parc.jp/