J-PARC
ANNUALREPORT2 O 1 OJ 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

Editorial Board (April 2011 – March 2012)
Takashi KATO (Management Supporting Section)
Yoshihiro NAKANE (Safety Division)
Masahiro NOMURA (Accelerator Division)
Takahiro OKAMURA (Particle and Nuclear Physics Division)Toshiya OTOMO (Materials and Life Science Division) (Associate Editor-in-Chief)
Naohito SAITO (Particle and Nuclear Physics Division)
Tatsuya SHIINA (Public Relations Section)
Toshinori SUZUKI (Users Office Team)
Hiroshi TAKADA (Materials and Life Science Division) (Editor-in-Chief)
Kazufumi TSUJIMOTO (Transmutation Section)

J-PARC Annual Report 2010
Contents
Preface… …………………………………………………………………………………………………………

1

Effect of The Great East Japan Earthquake… ………………………………………………………………   3
Accelerators… ……………………………………………………………………………………………………

9

Overview… ………………………………………………………………………………………………… 10
LINAC… …………………………………………………………………………………………………… 12
RCS… ……………………………………………………………………………………………………… 13
MR… ……………………………………………………………………………………………………… 14
Materials and Life Science Experimental Facility… ……………………………………………………………… 17
Overview… ………………………………………………………………………………………………… 18
Neutron Source… ………………………………………………………………………………………… 20
Neutron Science… ………………………………………………………………………………………… 22
Muon Science… …………………………………………………………………………………………… 25
Neutron Device… ………………………………………………………………………………………… 28
Particle and Nuclear Physics… …………………………………………………………………………………… 29
First results from Nuclear and Particle Physics : Pentaquark Search and T2K … …………………………… 30
Cryogenics… ……………………………………………………………………………………………………… 33
Overview… ………………………………………………………………………………………………… 34
Operation and Construction Support… …………………………………………………………………… 34
R&D for the Future J-PARC Projects COMET… ……………………………………………………………… 35
g-2 and HFS………………………………………………………………………………………………… 35
Cryogen Supply at J-PARC… ……………………………………………………………………………… 36
Information System… …………………………………………………………………………………………… 37
Overview… ………………………………………………………………………………………………… 38
Statistics of Network Utilization … ………………………………………………………………………… 38
Statistics of Computer Resource Utilization………………………………………………………………… 39
Upgrade of SINET and IBBN Network and the near Future JLAN Upgrade Plan … ………………………… 40
Damage and Recovery from The Great East Japan Earthquake … ………………………………………… 40
Transmutation Studies… ………………………………………………………………………………………… 41
Activities… ………………………………………………………………………………………………… 42
Safety   … ………………………………………………………………………………………………………… 45
Users Office … …………………………………………………………………………………………………… 49
User Program… …………………………………………………………………………………………………… 53
Organization and Committees… ………………………………………………………………………………… 59
Main Parameters … ……………………………………………………………………………………………… 65
Events ……………………………………………………………………………………………………………… 67
Publications… …………………………………………………………………………………………………… 75

J-PARC Annual Report 2010     Preface

1

PrefaceDuring the 2010 fiscal year covered by this third Annual Report of theJapan Proton Accelerator Research Complex (J-PARC), the proton beam
power was successfully ramped up to 200 kW and 145 kW at 3 GeV(RCS) and 50 GeV (MR), respectively. The neutron, muon, hadron andneutrino experimental facilities all operated very smoothly and with many
contented users until the 11th of March 2011 at the very end of FY 2010.
On this day, northeastern Japan, where J-PARC is situated, wasstruck by a massive (M 9.0) earthquake and a devastating tsunami. JPARC sustained no damage from the tsunami but was severely impacted
by the earthquake, being shut down immediately. Fortunately, no J-PARC
users or staff were injured. However, the damage to the facilities and infrastructure was very serious and spread across the entire site (See themain text). It was clear immediately that very extensive work and time
would be required to make a full recovery and to resume user programs.
In the face of daunting challenges, J-PARC responded rapidly and an
ambitious recovery plan was developed and implemented. The recovery
work proceeded at an exhaustive pace, very often around the clock, overthe ensuing months. Thanks to the tremendous effort of work teams fromPreface     J-PARC Annual Report 20102

all sections of J-PARC, the three proton accelerators were re-started forcommissioning work one by one and beam extracted to the neutron andneutrino experimental facilities on schedule in December 2011 – just 9months after the earthquake. Full details of the recovery work will appear
in the next Annual Report.
Before the shutdown of the facility due to the earthquake, experimental programs were proceeding very well. Examples include the exciting
observation of electron neutrinos derived from J-PARC muon neutrinos
as reported by the neutrino group. Similarly, results deriving from datacollected at the J-PARC neutron beamlines contributed to some highprofile discoveries such as the reported novel battery materials.
The facilitation and production of world’s best scientific outcomes remain as the core mission of J-PARC. It is our commitment and goal tocontinue to strive in this endeavor.

Shoji Nagamiya
Director of the J-PARC Center

J-PARC Annual Report 2010     Preface

3

Effect of The Great East Japan Earthquake
1. Linac
A big earthquake hit northeastern Japan on March 11, 2011.  J-PARC is located about 200 km from the center of earthquake, and suffered significant damages.  As shown in Photo 1, a road in front of the Linac was severely cracked, and a certain area in front of the Linac sank by 1.5 m, as shown in Photo 2.  The damage inside the accelerator tunnel was fortunately
minimal, since the main building had been built with many underpins to support it. But the earthquake effect at Linac
was the most serious among all other buildings.  Immediately after the earthquake, 100 tons of water was spilled out fromunderground, as shown in Photo 3.  Since the water was highly
alkaline, we had to use many tons of acids to neutralize it.  It took
over one week to pump out the water.  The next big issue was the
problem of the ground sinking along the Linac tunnel. It appearedthat a water creek ran under the Linac area many decades ago.  Themiddle of the building sank about 4 cm drop even with the many
underpins installed to support it (Photo 4).  For the moment, weplan to tune beams 4 cm toward the downhill and then to movethem up to the normal height at the end of the Linac.

Photo 1.   Cracks in front of the Linac.

Many pipes for
supplying coolingwater were damaged.

Photo 2.   A small place in front of Linac sank by 1.5 m (left). Repair works are under progress (right).

Inside of underground tunnel
immediately after the Earthquake
Photo 3.   The Linac tunnel immediately after the earthquake.

Preface     J-PARC Annual Report 20104Photo 4.   Linac repairs. Around the place where one person
is working, a drop of 4 cm was observed.

2. 3 GeV Rapid Cycling Synchrotron and 50 GeV Main Ring
The damage around the 3 GeV Rapid Cycling Synchrotron (RCS) building was also serious. The surrounding road waswaving, as shown in the left top picture in Photo 5. The repair of the road was done as the first priority for the 3 GeV RCS
facility, otherwise it would have been impossible to proceed with any further repair work. For example, as shown in the right
top picture of Photo 5, the power generator was tilted to the right hand side. With modern technology able to jack up theentire floor, the repair work has been completed.
Around the 3 GeV RCS building, many areas have severe problems. An example is shown in Photo 6. The condenser bank
was severely bent due to the drop of the land level. We repaired it by adding a concrete shield, as shown in the lower part of
Photo 6. A significant amount of concrete support was added.
On the other hand, inside the building we had no significant problems, again due to the presence of many underpins.
Shown in Photo 7 are the healthy components of the 3 GeV RCS . In the 50 GeV Main Ring (MR), many magnets were forced tomove by the earthquake. Figure 1 show the results. Magnets moved by 2-3 cm at the maximum. A total of 400 magnets had
to be carefully realigned to the original positions and the work has been very time consuming. Within 1 cm displacement,
the adjustment was rather easy but beyond 2 cm the entire magnet stand had to be replaced.

Photo 5.   Damage around the 3 GeV RCS building.

J-PARC Annual Report 2010     Preface

5

added portion

Photo 6.   Around the 3 GeV RCS building, a significant amount of concrete had to be added to bring it back to the normal level.

Photo 7.   3 GeV RCS components in the tunnel. No significant damage was observed.

Amplified x2000

Fig.1   Movement of magnets at the 50 GeV Main Ring.

Preface     J-PARC Annual Report 2010

6

3. Materials and Life Science Experimental Facility
The Materials and Life Science Experimental Facility (MLF) was, relatively speaking, in a better condition. The outside
area suffered significant damage, as shown in Photo 8. On the other hand, the inner major experimental hall had almost no
damages. The problem here was a significant displacement of the shielding blocks. For example, 4,000 tons of iron shields
near the neutron target area had to be moved out and, then, restacked again piece by piece, as shown in Photo 9.
Other significant repair works had to be done on the surrounding buildings. On both sides of the main hall, neutron lines
were extended for some of the equipment into the outside of the main building. For those beam lines we added buildings
without many underpins. These buildings sank by 30 cm, so we had to jack them up to the same level as the main building.

Photo 8.   Outside area of the Materials and Life Science Experimental Facility (MLF).

Immediately after the Earthquake

Photo 9.   Displacement of the ion shields built in the most upstream area of the neutron instruments in MLF. 4000
tons of iron shields had to be removed and re-built again.

J-PARC Annual Report 2010     Preface

7

4. Neutrino and Hadron Experimental Facilities
The Neutrino and the Hadron Experimental facilities have been also damaged, but the damage level was minimal. In
the neutrino area an air condition unit fell down as shown in the left part of Photo 10. There is a unit called "electric horn"
designed to focus pion beams toward Super Kamiokande. The right part of Photo 10 shows the third horn which was pulled
out for the inspection. Due to the possibility of high radiation level, this element was carefully examined, but no damages
were detected.
As of the Hadron facility, the outside area sank significantly, as shown in Photo 11. Inside the experimental hall, many
shield blocks had to be adjusted, so that over 3,000 tons of concrete shield blocks had to be removed and be restacked. This
work was time consuming. On the other hand, no significant damages have been observed in the main experimental hall.

Photo 10.   Neutrino experimental hall.
Outside the hall, the air conditioning power was tilted (left).
A photo of the 3rd horn underinspection (right).

Photo 11.   Hadron hall. The outside area of the building was lowered significantly.

Preface     J-PARC Annual Report 20108

5. Summary of the Earthquake Effects
Overall summary of The Great East Japan Earthquake is as follows:◦	There were no tsunami effects caused by the earthquake in the J-PARC area. We are prepared for up to 8 m tsunami
protection and the actual tsunami level was much lower.
◦ The main buildings were not much affected due to the many underpins installed to support them.
◦ However, many utility buildings, roads and added buildings were significantly damaged.
◦	Our goal is to complete the recovery by the end of 2011. We thus expect about 2 month operation of beams for users
in Japanese fiscal year (JFY) 2011, which ends on March 31 of 2012
◦ In JFY 2012, we plan to run a full cycle operation, namely, a 200 day operation for users.

Linac3 GeV RCS
50 GeV MR

Accelerators

Accelerators     J-PARC Annual Report 201010

Overview
The accelerator system had beenstably operated after the recovery of
the radio-frequency quadrupole (RFQ)
linac in 2009, but was interrupted by
the Great East Japan Earthquake on
March 11, 2011. Though there wasno serious damage to the accelerator
devices themselves, significant damages were found in the buildings andutilities. J-PARC is making best efforts
to obtain beams for the users within
Japanese fiscal year (JFY) 2011. The details will be explained in the dedicatedchapter.

This year we were successful inmany areas, and the main achievements were as follows:  (1) 	 200 kW user run of rapid cycling  
synchrotron (RCS) for Materials
and Life Science Experimental Facility (MLF) was started on November 26.
(2) 	 400 kW demonstration for MLF on
January 18.
(3) 	 145 kW user run of MR - FX (Fast
Extraction for neutrino) was started this year.
(4) 	 99.5% extraction efficiency of MR -Table 1. The accelerator status in JFY 2010.

SX (Slow Extraction) has been kept
for Hadron user run. (But the beam
intensity was ~ 3 kW.)(5) 10 kW extraction of MR - SX wasdemonstrated on November 15.
(6) 	 Successful 2-month continuous
operation of the ion source in November and December.
(7) 	 High power test of the annularring coupled structure (ACS) module was done on January 27 with apower of 1.6 MW which means anacceleration gradient of 4.5 MV/m(the designed value is 4.1 MV/m).

：Great East Japan Earthquake: Mar.11

J-PARC Accelerator Operation in FY 2010
Month

4

5

6

32

33

34

7

8

9

10

11

12

1

2

3

Operation
Run #MLF User Run
Operation Power

120 kW

MR-Slow Ext.
Operation PowerMR-Fast Ext.
Operation Power

35

36

37

38

120 kW
200 kW
400 kW Single shot operation: Jan. 18
3 kW

40 → 50 kW

Extraction Efficiency: 99.5%

100 → 145 kW

Table 1. The accelerator status in FY 2010
Scheduled Operation TimeOperation Time

Tuning1120 hrs(20.2 %)
Preparation
783.4 hrs
(14.1 %)

User
3401.2 hrs(61.3 %)

Tuning1120 hrs(20.2 %)
Trouble245.4 hrs
(4.4 %)

User
3401.2 hrs(61.3 %)

Trouble245.4 hrs
(4.4 %)

Fig. 1.  Scheduled operation time of JFY 2010.  Total scheduled
operation time is 5550 hours. Preparation means conditioning, radiation survey and so on.

Fig. 2.  Operation time of JFY 2010. Total operation time is4766.6 hours.

J-PARC Annual Report 2010     Accelerators

11
%
100

The total scheduled operation time was 5550 hours
and the total user time reached 3400 hours as shownin the following figures (Fig. 1 and Fig. 2). The total user
times and average availabilities are shown in Table 2
and Fig. 3. As for the long user run times at Run #36 and#37, these are summarized in Table 3 and 4.
The steady progress toward 1 MW of RCS and 0.75
MW of MR had been proceeding along the scheduleshown in Fig. 4. The 400 kW test in RCS verified the reality of 1 MW with the 400 MeV injection. However, theprogress of beam commissioning has clarified many issues to be overcome in MR, and the discussion about
setting a medium goal has started.

95

90
MLF
NU
85

HD
32

33

34

35

36 37
Run #

RCS Power For MLF
MR-FX Output PowerBeam Power [MW]0.6
400 kW
Single shot mode
0.4
300 kW (One Shot)
300 kW 1 hour 200 kW Steady
0.2
100 kW 1 hour
0.0

JFY2008

145 kW Steady

JFY2009

JFY2010

JFY2011

JFY2012

JFY2013

Fig. 4.   Road to 1 MW in RCS and 0.75 MW in MR-FX.
Table 2. User time and average availabilities for JFY 2010.

user

hrs

MLF
Neutrino
HadronAvailability (%)
2388.02529.7
450.9

94.8
95.7
94.6

Table 3. User time and average availabilities for the RUN cycle #36.

user

hrs

MLF
Neutrino

Availability (%)
713
682

96.5
99.6

Table 4. User time and average availabilities for the RUN cycle #37.

user
MLF
Neutrinohrs

Availability (%)
656
783

39 Avarage

Fig. 3.   Availability for the user run in JFY 2010.

1.0

0.8

38

97.2
97.8

JFY2014

Accelerators     J-PARC Annual Report 2010

12

LINAC
The radio-frequency quadrupole(RFQ), which had discharge problems
from 2008 to 2009, was scheduled for
conditioning in the operation calendar.
The interval gradually extended fromonce a week while monitoring the number of trips in the RFQ. The performanceof the RFQ was recovered through thedemonstration of 19 days of continuous operation in June and nearly twomonths operation from November toDecember, in spite of several hours ofconditioning at beam stops caused byother issues.
The beam trip in the linac wasmainly caused by the RFQ and the separated-type drift tube linac (SDTL). The
down time was approximately 43.5 and30 hrs, respectively. When a beam trip
occurs, the operators confirm the cause,then reset the interlock and restart thebeam. Therefore, even if a beam trip
lasts a few seconds, it takes at least one
minute to restart the beam. The total
number of downtime was 1,096 and496 for the RFQ and the SDTL, respectively, and the recorded downtime in
one year was more than 30 hrs. We areconsidering shortening the resuming
time for insignificant trips such as RF
minor discharges.
One of the major causes related to
the SDTL cavity was a discharge problem in the coaxial feeder line in June
2010. The downtime following this incident was 7 hrs and 20 min. Because thisphenomenon happens frequently, we
are monitoring the temperature at thefeeder lines to understand it.
The ion source is one of the factorsthat determines the operation hours.
The typical ion source operation time
is approximately 600 hrs for each run.
The ion source chamber with a new filament was replaced as preventive maintenance. To evaluate the actual lifetimeof the filament, we operated continuously for 2 months starting in Novem-

ber 2010. As a result, the ion source
delivered the beam at a beam currentof 16 mA for 1,270 hrs without maintenance. This duration was determinedby the operation schedule at the end of
2010, not by the ion source. In the next
run from January 2011, the ion source
delivered the beam at a higher currentof 25 mA for 217 hrs. This was deduced
from the RCS beam study of the highpower demonstration at 400 kW. Then,a continuous user operation at 16 mA
was carried out. In this case, the filament broke after 1,029 hrs. At any rate,
it was shown that a longer run cycle of
1,000 hrs would be possible.
We took some measures to reduce
the time required for maintenance. Replacement parts were unitized and avacuum chamber for storage was fabricated. We can keep the ion source
assembly in vacuum conditions just before installation. As a result, the maintenance time has been shortened fromfour days to one or two days.
One of the major causes for the
beam trip, which is related to high power RF components, is the discharge in
the anode modulators. The electrode in
the oil tank is covered with a polyethylene insulator. Some discharge traces
have been found between the polyeth-

ylene surfaces and the inner surface ofthe tank. To remedy this problem, thearrangement of the equipment has
been reviewed to provide enough insulation distance and some modulators
have been modified.
It was found that the beam loss inthe beam transport line was causedby the stripping reaction of H0 withresidual gas. During the 2010 summer
shutdown, some vacuum pumps wereadded to the SDTL section and thebeam transport line. As a result, better vacuum minimized the beam loss;
however, we did not see significant
improvement at the SDTL section andfurther studies are needed.
An energy upgrade project from181 to 400 MeV with an Annular-ring
Coupled Structure linac (ACS) has been
funded since JFY2008. Mass productionof the ACS modules and installation of
klystron power supplies and waveguides, cabling, etc. has progressed.
The high power test for the first ACS
module was successfully demonstrated
in January, and it was confirmed thatthe mass production fabrication process was reasonable. Photo 1 shows thefirst mass production module under
the high power test.

Photo 1. T he first mass production module of ACS under the highpower test.

J-PARC Annual Report 2010     Accelerators

13

RCS
The rapid cycling synchrotron(RCS) has been providing beam withgood stability both for the Materials
and Life Science Experimental Facility (MLF) user program and for the MR
during this year. In parallel we havebeen challenged to realize higher
beam power operations with betterstability.
Figure 5 shows 1-hour averaged
power and integrated power for MLF
user operation for this year. Blue lines
show 1-hour averaged power for a day
and the green line shows an accumulated beam power from December
23rd 2008 for the MLF user operation.  
The scheduled maintenance period
was from July to September as shownin Fig. 5. The MLF user operation was
stopped according to plan from the
middle of December to the middle ofJanuary to construct additional beamlines for the MLF users. The beam
power for the MLF user operation was
limited not by the performance of theaccelerators but by a request forma neutron production target. Beam
power equivalent to 300 kW has beendelivered to the MR for the user operation. It could be realized full chromatic
correction to be installed alternating
current (AC) power supplies for sextupole magnets in the scheduled maintenance period. In the same time
charge exchange foils with smaller size
were installed to reduce beam losses

in the injection area. All cable connectors of extraction kicker magnets andsome pieces of MA core for RF cavities
were also replaced to achieve betterstability during this period.
Aside from being a user operation,
we have also been challenging to realize higher beam power operations
with better stability. High intensity
beam studies could be done and we
obtained parameters for 400 kW MLF
user operation. It was possible to deliver the equivalent of 400 kW beam to
the MR and it could be realize for beam
to the MLF after reduction of beamloss at injection in the RCS.

250

500
MLF-Power

Beam Power (kW/day)
Accumulated Beam Power (MWh)

#36

400

150

300
#33

#34

#35

100

200
Maintenance
Period#32
50

Accumulated Beam Power [MWh]Beam Power [kW/day]

200

#37

100

0
2010

4

5

6

7

8

9

10

11

12

1

Month

0
2011

Fig. 5.  1-hour averaged power and integrated power for the MLF user operation in JFY 2010.

Fig. 6. 1-h averaged power and integrated power for the MLF user operation in the Japanese fiscal year 2010.

Accelerators     J-PARC Annual Report 2010

14

MR
The main ring (MR) has two beam
extraction systems. One is a fast extraction system for beam delivery to theneutrino beam line of the Tokai-to-Kamioka (T2K) experiment, and the otheris a slow extraction system for beam delivery to the hadron experimental hall.
Figure 6 shows the delivered beam
power of the MR during the current fiscal year. Before the summer shutdown
period, the MR was operated in the fast
extraction mode with a cycle time of
3.52 s and six bunches. The delivered
beam power was limited to around 50
kW because of a problem with the kickangle drift of the extraction kickers.
The drift came from heating of the ferrite cores with the beam-induced wakefield.  
During the summer shutdown periods, we replaced the extraction kicker
system with a newly developed one,which has a low beam coupling impedance to suppress the kick angle drift anda faster rise time to make possible theoperation with eight bunches insteadof six.   We also improved the power
supplies of the bending magnets to decrease the cycle time and increase thebeam power. The energy recovery condensers of the rectification circuits were
adjusted to shorten the deceleration
time of the magnet current from 30 GeV
to 3 GeV excitations. As a result, the MR
cycle time could be reduced from 3.52 s
to 3.2 s or less for the fast extraction operation.  The other improvement, performed in the 2010 summer shutdown,
was an upgrade of the beam collimators, which are located in the 3-50 BT(beam transport line between the RCS
and the MR).  The collimator system isinstalled to cut the beam halo and localize the beam loss in the collimator
section. The loss capacity of the 3-50
BT collimators was 0.45 kW before the2010 summer shutdown. The capacity
should be increased for operation withthe future MW-class beam. During the2010 summer shutdown, additional

iron shields were installed in the 3-50
BT collimators. Photo 2 shows the 3-50
BT collimator section with the newly
installed gated-shape iron shields. The
thickness of the shield is 0.72 m on top
and 0.25 m in both sides. The shields
are mounted and slide on a linear motion guide system to facilitate maintenance. The loss capacity of the 3-50 BT
collimators is increased from 0.45 kW to
2 kW by the additional shields.  
The MR restarted the operation in
the slow extraction mode in the autumn
of 2010.  The slow extraction system hasfour bump magnets, two electrostatic
septa (ESS1&2), and ten magnetic septa(SMS1_1~SMS3_4) in the straight section, which is connected to the beamtransfer line between the MR and thehadron experimental facility.  Eight sextupoles that are used to excite the third
integer resonance are located in the arc
sections.  After the beam acceleration,
the horizontal tune is gradually ramped
up to the resonance line by changing

180
160

Beam power [kW]140

Fast extraction
3.52 s cycle
6 bunches

Summer shutdown

120

Slow
extraction
6.0 s cycle
6/8 bunches

Fast extraction
3.2/3.04 s cycle
8 bunches
FX:145kW

100
80
60
40
SX:3.6 kW

2
005/01/2010

08/01/2010

10/01/2010

12/01/2010

DateFig. 6.  Beam history of the MR in JFY 2010.

02/01/2011

J-PARC Annual Report 2010     Accelerators

15
one of the quadrupole families, called
QFN, which has 48 magnets located in
the arc sections, and the beam is slowly
extracted. The cycle time of the slow
extraction is 6.0 s, which includes along flattop period of 2.93 s for the extraction.
One of the most critical issues forthe slow extraction operation is theformation of radioactivity in the components. High extraction efficiency
is required to avoid leaving residual
activity, which would make hands-on
maintenance difficult. In order to improve the extraction efficiency, a dynamic bump system has been adopted
in the operation since October 2010.  
This dynamic bump system controls
the strengths of the four bump magnets to decrease the hitting rate of thebeam on the ESS1 septum during theramping of the QFN. As a result, thebeam losses downstream of the ESS1
have been reduced in the extraction.
Figure 7 shows the beam loss distributions in the SX straight section and timedependences of the beam loss for (1)fixed bump operation and (2) dynamic
bump operation. The beam loss is drastically improved for the dynamic bumpoperation. The extraction efficiency
for the fixed bump operation is 98.3%,
whereas that for the dynamic bumpoperation is 99.5%, which is the world’s
highest extraction efficiency for slow
extraction.
In the 2010 autumn operation, themaximum beam power delivered to thehadron experimental facility was 3.6 kW
for the continuous user operation and
10 kW for a high power demonstration.
On November 16, we switchedthe operation mode from the slow to
the fast extraction. We delivered thebeam to the T2K experiment with acycle time of 3.2 s and eight bunches.
The delivered beam power was gradually increased as shown in Fig. 6. In theMR, coherent oscillation of betatronsidebands is observed above the intensity of 4 × 1011 ppb (particles per bunch)with a small bunching factor beam fromthe RCS (without RF second harmonics).
In the routine operations, the chromaticity of the MR was set to be -5 ~ -7 tosuppress the instability at the injectionenergy. Additionally, we adopted thebunch-by-bunch feedback system tosuppress the instability in this autumn/
winter run.
On March 7, the cycle time wasshortened from 3.2 s to 3.04 s. Since
then, the 145-kW beam power was delivered to the T2K experiment until themorning of March 11, the day of The
Great East Japan Earthquake.

Photo 2.   The 3-50 BT collimator section with the newly installedgate-shaped iron shields.

Accelerators     J-PARC Annual Report 201016
(1)

norm. loss count

1000
800

SM S2
SMS1

E SS1 E SS2

600

SMS3

400
200
0
70

75

80

85

90

loss monitor address

norm. loss count

600
500
400
300
200
100
0

1000

2000

3000

4000

time from P1(ms)

5000

(2)

norm. loss count

1000
800

SMS2
SMS1

ESS1 ESS2

600

SMS3

400
200
0
70

75

80

85

90

loss monitor address

norm. loss count

400
350
300
250
200
150
100
50
0

1000

2000

3000

time from P1(ms)

4000

5000

Fig. 7.  Beam loss distribution in the slow-extraction straight section (upper) and time dependence of the beam loss
(lower) for (1) fixed bump operation and (2) dynamic bump operation.

Materials and Life Science
Experimental Facility

Materials and Life Science Experimental Facility     J-PARC Annual Report 201018

Overview
The recovery of the cryogenic hydrogen loop for the moderators fromthe accumulator trouble was the mosturgent issue in the beginning of theJapanese fiscal year (JFY) 2010. An alternative operation sequence without
accumulator function was adopted as
the fastest measure so that the user
programs could be resumed in May
2011 with a proton beam power of 120
kW. The proton beam power delivered from the accelerator was ramped
up to over 200 kW in November withhigh beam availability of around 92%.
During the autumn run cycles, we suffered unplanned beam shutdown forabout 10 days in total due to the heatexchange degradation in the helium
refrigerator of the cryogenic hydrogensystem. Nevertheless, the annual neutron and muon production operation
time for the user programs exceeded
2300 hours before the operation was
terminated by the Great East Japan
Earthquake on March 11, 2011. The
approved experimental proposals
reached 350 for 9 neutron and 2 muon
instruments, which was a 30% increase
from the last fiscal year.
Both the neutron and muon instruments are working quite reliably,
producing very high quality of data.
The constructions of six neutron instruments is in progress on schedule,
four of those instruments were budgeted as a public beamline in termsof the Law for Promotion of Public
Utilization of the Specific Advanced

Large Research Facilities. According to
the law, the public beamlimes shall be
managed by the Registered Institution
for Facility Use Promotion (RIFUP). For
example, the proposal reviews and theuser support activities are conducted
by RIFUP independently. In March, theComprehensive Research Organization for Science and Society (CROSS)
was approved as a RIFUP at the initiative of the Ministry of Education, Culture, Sports, Science and Technology.
The Muon group concentrated theireffort on the construction planningof the ultra-slow muon beam line. The
construction itself will start in the summer of 2011.

Table 1.  Beam statistics for the MLF user program in Japanese fiscal year (JFY) 2010.

No. ofrun cycle

Nominal beam
power (kW)

Duration#32

120

Only for target study

#33

120

#34

Scheduled Time(*)(h)

Availability(%)

05/09/10 02pm - 06/01/10 07am

487

92.1

120

06/07/10 01pm - 06/26/10 07am

397

89.5

#35

120

10/16/10 12pm - 11/01/10 06am

357

41.0

#36

120, 210

11/07/10 12pm - 12/18 /10 12pm

922

72.8

#37

220

01/21/11 03pm – 02/19/11 12pm

675

92.3

#38

220

03/07/11 03pm -418(**)(*) Note: The scheduled time excludes the duration allocated for the purpose of the beam study for the 3-GeV proton beam transport line
and/or the mercury target in MLF. Thus, the value in each run cycle differs from that shown in the Tables 2 to 4 in the Accelerators chapter.
(**) terminated by the Great East Japan Earthquake on March 11, 2011

J-PARC Annual Report 2010      Materials and Life Science Experimental Facility

19

BL-08: S-HRPD
BL-09: SPICA

BL-05: NOP

BL-10: NOBORU

BL-04: ANNRI

BL-11: PLANET

BL-03: iBIX

BL-12: HRC

BL-02: DNA
BL-01: 4SEASONS

Proton beam line

D1 Instrument
D2 Instrument
BL-21: NOVA

BL-14: AMATERAS
BL-15: TAIKAN

BL-20: iMATERIA

BL-16: SOFLIA

BL-19: TAKUMI

BL-17: SHARAKU

BL-18: SENJU

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

Name of Instruments
Moderator
4SEASONS: 4D Space Access Neutron Spectrometer
Coupled
DNA: Biomolecular Dynamics Spectrometer
CouplediBIX: IBARAKI Biological Crystal Diffractometer
Coupled
ANNRI: Accurate Neutron-Nucleus Reaction measurement Instrument
Coupled
NOP: Neutron Optics and Fundamental Physics
CoupledVIN ROSE: VIllage of Neutron ResOnance Spin Echo spectrometers
CoupledS-HRPD: Super High Resolution Powder Diffractometer
Poisoned
SPICA: Special Environment Neutron Powder Diffractometer
Poisoned
NOBORU: NeutrOn Beam-line for Observation & Research Use
Decoupled
PLANET: High Pressure Neutron Diffractometer
Decoupled
HRC: High Resolution Chopper Spectrometer
Decoupled
AMATERAS: Cold-Neutron Disk-Chopper Spectrometer
Coupled
TAIKAN: Smaller-Angle Neutron Scattering Instrument
CoupledSOFIA: Soft Interface Analyzer
CoupledSHARAKU: Polarized Neutron Reflectometer with Vertical Sample Geometry CoupledSENJU: Single Crystal Neutron Diffractometer under Extreme Condition
Poisoned
TAKUMI: Engineering Materials Diffractometer
Poisoned
iMATERIA: IBARAKI Materials Design Diffractometer
Poisoned
NOVA: High Intensity Total diffractometer
Decoupled

Statusin useunder constructionin usein use (*)
in use(*)
planning
in useunder constructionin useunder constructionin use (*)
in useunder constructionin useunder construction
under constructionin usein usein use(*) Note: General use progam was not allocated in JFY 2010.

Muon Instruments
BL
D1
D2

Name of Instruments
D1 Instrument
D2 Instrument

Statusin usein useFig. 1.  Layout and status of the neutron and muon instruments at the MLF as of March, 2011.

Materials and Life Science Experimental Facility     J-PARC Annual Report 201020

Neutron Source
Progress of 3-GeV proton beamtransport facility
An expert beam tuning system was developed
for operators, who are not experts in tuning beamsof the 3-GeV beam proton beam transport facility(3NBT). When the beam position detected by thebeam monitors deviates from the reference value
calculated with the MAD code, the system estimates
the beam angles at the steering magnets necessary
for beam correction and adjusts currents to thosemagnets automatically.
Extrapolating the beam profile obtained at thebeam window to that at the target vessel, the heat
deposited at the peripheral vicinity of the mercury
target was estimated to be 0.3 W/cc even with larger
beam size (Fig. 2). This value is smaller than the allowable level of 1 W/cc. Therefore, the 200-kW beamis currently delivered with the low peak heat deposition of 1.7 J/cc/pulse in the mercury target.
The beam optics study has been advanced toreduce the current density of the proton beam onto
the target vessel to suppress the damage on the vessel, which is proportional to the 4th power of thepeak intensity of the beam (P4 law). It was concluded
that two octupole magnets with the magnetic field
distribution of the differential coefficient of 3rd orderof 800 T/m3 could suppress the peak current density
down to 68%, which equals a 20% reduction according to the P4 law, compared to the current beam profiles with expected flatter profiles in horizontal andvertical directions.

Fig. 2.  Beam profile for 200kW operation.

50000
40000

Gauss(σh 37mm)
OCT(aug24#2)

30000
20000
10000
0
-20

-10

0
10
Horizontal (cm)20

Fig. 3.  Estimated beam profile in horizontal direction by introducing octupole magnets (red dots).

Progress of next generation mercury target development
To realize the mitigating pressure
waves induced in the mercury target
vessel for high intensity proton beam
injection, we designed a target vessel
with multi type swirl bubbler and its
fabrication started at the contractor’s
factory. The design studies of the nextgeneration mercury target, from which
the rear body can be separated, also
advanced steadily while resolving somedesign issues. On September 29, 2010,

we held a design review meeting for the
separate-type target to which experts
from outside organizations were invited.
Based on the review comments, we built
a for the practical use of the target vesselin the near future (see Fig. 4 ). The target
vessel with the multi type swirl bubbler
will be in use from the run cycle in theautumn of 2011. For the separate-typetarget, both the analytical and experimental studies of the flange structure

connecting the fore and the rear bodies have advanced steadily to realize
the seal performance criteria of 1x10 -6Pa∙m3/s.
For the existing target, the failure
detection function was enforced by introducing a monitoring system to detect
radioactive products which have leaked
from the mercury into the intermediate
helium layer through the most inner target vessel wall.

J-PARC Annual Report 2010      Materials and Life Science Experimental Facility

21
FY

2010
120 kW

Beam power

2011
200 kW

Restoration#1 (w/o bubbler)

Target on duty

#3 (with bubbler)
Fabrivation schedule

Spare target

2012

Gas injection system#2 (w/o bubbler)

2013
Linac power up 400 kW

100 - 300 kW

Installation

Installation#4#3
Installation and commissioning
Gas injevtion system on duty
Separate type
#4 (Front + Rear)#6 (Front)#5 (Front + Rear)#4#5

Fig. 4.  Usage and construction plan of neutron production mercury target vessels.
Note: The operation in JFY 2011 is to begin in December, since the repair works of the damages caused by the Great East Japan
Earthquake will be finished by then. The Linac energy recovery will be postponed to JFY 2013.

Operation of cryogenic hydrogen loop
The cryogenic hydrogen loop
struggled with two big issues: the failure of the accumulator system, which
occurred in February 2010 and the accumulation of impurities in the cryogenic helium refrigerator system during
the autumn run cycles. The detailed
inspections of the accumulator were
performed in the JFY 2010, concludingthat the welding section of the bellows

fractured because the welding depth
was less than the in-house standard.
As a temporal measure, the accumulator function was replaced by a heater tocontrol the volume change of the flowing hydrogen at the moderators. In thissituation, the pressure rise was 40 kPa
for the 120-kW proton beam operation,
which was 10 times higher than thecontrol with the accumulator but lessthan the limit value of 50 kPa.
The issue of the cryogenic helium
refrigerator system came from the insufficient regeneration procedure after
replacing the charcoal in the adsorberin the summer maintenance period.
This required additional regenerationof the charcoal with dry nitrogen forabout a month, forcing the interruptionof the user program.

Photo 1.  Exchange of the accumulator for cryogenic hydrogen system.
The cryogenic hydrogen system was recovered to receive 200-kW beam by exchanging thefailed accumulator (right) to new one (left) in the summer shut-down period.

Materials and Life Science Experimental Facility     J-PARC Annual Report 201022

Neutron Science
Status of Instruments
In JFY 2010, we have operated fivediffractometers (iBIX (BL03), SuperHRPD(BL08), TAKUMI (BL19), iMATERIA (BL20)
and NOVA (BL21)), three chopper spectormeters (4SEASONS (BL01), HRC (BL12)and AMATERAS (BL14)), one reflectometer (SOFIA (BL16, upgraded from ARISAII)) and three other instruments (ANNRI(BL04), NOP (BL05) and NOBORU (BL10)).  
Besides, six instruments were underconstruction: Biomolecular Dynamics
Spectrometer DNA (BL02), Special Environment Neutron Powder Diffractometer SPICA (BL09), High Pressure Neutron
Diffractometer PLANET (BL11), SmallerAngle Neutron Scattering Instrument
TAIKAN (BL15), Polarized Neutron Reflectometer with a Vertical Sample
Geometry SHARAKU (BL17), and Single
Crystal Neutron Diffractometer under

Extreme Condition SENJU (BL18). In addition to these instruments’ construction, we worked on a broad range ofdevelopments related to neutron scattering technique, such as new imaging technics, sample environments fortime-transient measurements, computing environments, etc.

New Techniques
Pulsed Neutron Imaging - Bragg edge imaging of quenched iron rods
Figure 5 shows a transmission im- shows images of the real space distriage of quenched iron rods (the diameter bution of the crystal lattice plane spacis 26 mm and the thickness is 20 mm) ing of {110} for quenching depth 3, 5
with wavelength 1 ~ 5 Å neutrons, and and 7 mm samples. These images werea wavelength-resolved transmission obtained by analyzing the {110} Bragg
image around the {110} Bragg edge edges of position-dependent trans(4.089 ~ 4.100 Å). In the wavelength- mission TOF spectra of the specimens.
resolved image, it is possible to dis- The quenched zones show the broader
tinguish the quenched zone. Figure 6 lattice spacing, because the martens-

(mm)
14.0

(mm)
14.0

10.5

10.5

7.0

7.0

3.5

3.5

0

0

3.5

7.0

10.5

14.0
(mm)

0

0

3.5

7.0

10.5

14.0
(mm)

Fig. 5.  Neutron transmission images of quenching depth 5 mmsamples for wavelength 1 ~ 5 Å (left) and 4.089 ~ 4.100 Å(right).

ite transformation is caused by thequenching. It is clear that the quenching depths are increasing as 3, 5 and 7mm from the surface of each sample.
The quenched depths are consistent
with the induction hardening design ofthe manufacturer.

(mm)
14.0

(mm)
14.0

10.5

10.5

7.0

7.0

3.5

3.5

0

0

3.5

7.0

10.5

14.0
(mm)

0

0

3.5

10.5

14.0
(mm)

2.042

10.5

2.040
2.038

7.0

2.035

3.5
0

7.0

Lattice spacing(Å)
2.045

(mm)
14.0

2.033
2.020
0

3.5

7.0

10.5

14.0
(mm)

2.028

Fig. 6.  {110} lattice spacing of quenched iron samples;
quenching depth 3 mm (upper left), 5 mm (upper
right) and 7 mm (lower).

J-PARC Annual Report 2010      Materials and Life Science Experimental Facility

23

Scientific Topics
Crystal Structure Change of Cathode for Li Ion Battery during Charge (Y. Idemoto et al.)A new battery material, Li(Ni,Co,Cu) cell, neutron diffraction measure- octahedron became higher. It is preO2, in which a portion of the (Ni, Co) is ments were performed with iMATERIA sumably attributable to an increase in
replaced by low-valence Cu with the (BL20, J-PARC).
the valence of the Ni accompanying Li
2+ content to enaim of reducing the Ni
Figure 8 shows the profile fitting separation. Also, the MO6 octahedral
hance the battery characteristics was results for the cathode of the coin type distortion in the cathode is increased
synthesized and set up as a cathode cell after charging. The cathode charg- by charging.
material in a new coin type cell (Fig. ing reduced lattice parameter a andThese results demonstrate that it7) fabricated for neutron diffraction increased lattice parameter c. These is possible to evaluate the 8.5 mg of acmeasurements to analyze structural changes are attributable to Li separa- tive material in the cathode (containchanges caused by the charge – dis- tion and increased repulsion between ing the binder) by neutron diffraction.
charge process. After ex-situ charge- oxygen ions, respectively. After chargdischarge cycles with the coin type ing, the bond valence sum of the MO6

HS coin type cell

Cathode (φ1 cm)

Normalized Intensity

0.2
0.1
0.0
-0.1
-0.2

Fig. 7.  Coin type cell and cathode (φ 1 cm).

0.05

0.10

0.15

0.20

0.25

d spacing (nm)Fig. 8.  Rietveld refinement patterns using iMATERIA for
cathode of Li0.613Ni0.8Co0.19Cu0.01O2 (after charging,
Raw-BKG). The vertical marks indicate positionsof allowed Bragg reflections. The curve at thebottom is the difference between the observedand calculated intensities on the same scale.

Strong s±-like Spin Resonance in the Nodal Fe-Based Superconductor BaFe2(As0.65P0.35)2 (M. Ishikado et al.)The recent discovery of iron-based in lower-Tc iron-based ones. Further- formed to observe the magnetic resosuperconductors has renewed our more, the BaFe 2(As,P)2 supercon- nance on a ~ 36 g powder sample withinterest in the relationship between ductor has demonstrated that this Tc=30 K. The dynamical structure facunconventional superconductivity material possesses line nodes in the tor S(Q, E) of BaFe2(As0.65P0.35)2 below (5and magnetism. In the iron-based su- order parameter, in spite of its rela- K) and above (32 K) Tc was measured byperconductors that show relatively tively high-Tc of 30 K. To characterize 4SEASONS (BL01) in J-PARC as shownhigh transition temperature (Tc), fully- the magnetic excitation and the su- in Fig. 9(a) and (b). The dynamical
gapped s-wave symmetry has been perconducting (SC) gap symmetry of spin susceptibility χ "(E), which is calconfirmed. On the other hand, line BaFe2(As 0.65P 0.35)2 , inelastic neutron culated with observed S(Q, E) shows
node symmetry has been observed scattering measurements were per- that BaFe2(As,P)2 suggests that similar

22

the case of s±-wave occur between  and M FSs in the prese
situation
may be the possible reason why BaFe2(As,P)2 can hold tMaterials and Life Science Experimental Facility     J-PARC Annual Report
201030 K) to those of the iron-based high-Tc superconductors withou
24
existence of nodal symmetry [3].
amounts of sign reversed process tothe case of s±-wave occur between Γ
and M FSs in the present compound.
This situation may be the possible
reason why BaFe2(As,P)2 can hold thecomparable Tc (= 30 K) to those of theiron-based high-Tc superconductors
without nodes despite the existenceof nodal symmetry.

Fig. 9. Dynamical structure factor S(Q,E) of BaFe2(As0.65P0.35)2 measure

Fig. 9.  
structure
factorBaFe2(AsT0.65c).
P0.35)2 measured(b)S(Q,E)
32 Kof(above(c)and (d) show constant ener(a)Dynamical
5 K (below
Tc) andmeV at (a) 5 Kmeasured(below Tc) and(b)E32=K45.5(aboveTc). (e) and (f) are tho
i= 45.5
meV.
K withand E32K,
respectively,
with
i
(c)
and
(d)
show
constantenergy
cuts
of
S(Q,
E)
at
5
K
and
32
K,
21.6 meV. Solid lines are the results of fits to a Gaussianfunction on a sl
respectively, measured with Ei = 45.5 meV. (e) and (f ) are those
offset values of (c), (d) are 6, 12, 30, 41, 55, 70 for 10-16meV, and 5, 10
measured with Ei = 21.6 meV. Solid lines are the results of fits to
cuts(e),(f) for the clarity.
a Gaussian function on a sloped background. The offset valuesof (c), (d) are 6, 12, 30, 41, 55, 70 for 10-16 meV, and 5, 10, 15, 20
for 6-9 meV of cuts (e),(f ) for the clarity.

111

311

422

331
400

531
440

Normalized Intensity

220

High Pressure Neutron Diffraction Measurements of LaD2   (A. Machida et al.)Investigation focused on the hydrogen-metal and hydrogenhydrogen interactions under high pressure is the key to understand the limit of hydrogen storage capacity in metals. In case
LaD2
NPD
of LaH2, observed phase separation by X-ray suggests that it
forms domains of the hydrogen-poor and hydrogen-rich phases
spontaneously by pressurization. To understand the origin of thestructural transformations in LaH2, a Paris-Edinburgh (PE) press
P~2.7 GPa
(VX4, max. load 200 ton) with toroidal anvils was applied to thehigh-intensity total diffractometer, NOVA (BL21).
Figure 10 shows the selected neutron diffraction patterns of
P~11.5 GPa
LaD2 under high pressure. Above 11 GPa, several new reflection
peaks (indicated by arrows) appeared. By analyzing the Bragg
P~13.0 GPa
peaks and comparing them with those in x-ray diffraction, theformation of a NaCl-type monohydride in the rare-earth metal
diamondhydrides was confirmed. The discovery of rare-earth metal
0.5 1.0 1.5 2.0 2.5 3.0 3.5
monohydride will open the way to clarify the site-dependent nad-spacing (Å)
ture of hydrogen-metal interactions through comparison studies
Fig. 10.  Selected neutron diffraction patterns of LaD2
among mono-, di-, and tri-hydride.
at high pressures. Each profile is shifted forThis work has been partially supported by the New Energy
better visualization, and the base line foreach pattern is shown by the stick marks
and Industrial Technology Development Organization (NEDO)
on vertical axes. The background is notunder Advanced Fundamental Research on Hydrogen Storage
subtracted, showing the background is low
Materials (Hydro-Star).
even for high pressure diffraction.

010, the decay and surface muon beamline (D-Line) was operated for user
the Muon Science Establishments (MUSE). Other three beamlines, namely,
J-PARC Annual Report 2010      Materials and Life Science Experimental Facility
muon beamline for ultra slow muon (U-Line), dedicated surface muon beamline
high momentum muon beamline (H-line) were under designingdesigned.
25

Muon Sciencet of muon beam transport at D-line
he first beamline in MUSE and is capable to transport the muons from
JFY 2010, the decaysolenoidand surface
Establishments
Other
three dedicated surface muon beamline (Spions in theInsuperconducting
magnet.
It may be(MUSE).
possibleto delivermuon beamline(D-Line)was operated
beamlines,
namely,muon Line) and high momentum muon beamwell as positive
muons with
momentumup to
120MeV/c.
In superomega
2010, the limiting
for user programs at the Muon Science beamline for ultra slow muon (U-Line), line (H-line) were under designing.
of the D-line transport, namely, the electrodes and the high voltage power
he Wien filter (DCsep) and two quadrupole magnets (DQ4 and DQ7) wereones withlarge bores andaperturesto increase
the atbeamtransmission
Improvementof MuonBeam
Transport
D-LineD-line is the first beamline in MUSE

pole magnets (DQ4 and DQ7) were re-was consistent with the calculation.

capable of transporting
the mu-of D-line
on of the andnewiscomponents,
beam tuning
performed
accordingplaced waswith ones
with large
bores andto The beam intensity achieved 3.1×106
ons from decay-in-flightthe apertures
to increase
the beamtransvelope calculation
incorporatingpions
the inmeasured
fringing
magnetic
fields.
The surface muons per second under 220
superconducting
solenoidmagnet.
missionefficiency.
became much sharper than before as shown in Fig. 12, which was consistent kW proton beam. The 50-MeV/c decayIt may be possible to deliver nega-

After the installation of the newmuon beam intensity was ~1/3 of the

Wien filter (DCsep) and two quadru-

than before, as shown in Fig. 12, which

ing negative muons at J-PARC/MUSE.

y (cm)

ulation. Beam intensity achieved 3.1106 surface muons per second undertive as well as positive muons with components, beam tuning of D-line surface one, and was almost identicalbeam. The
50-MeV/c decay-muon beam intensity was ~1/3 of the surface one,
momentum up to 120 MeV/c. In 2010, was performed according to the beam for positive and negative muons. The
st identicalthe
forlimiting
positiveand negative
last point
is unexpectedfromcomponentsof themuons.
D-line The
envelope
calculation
incorporating
the a last point is unexpected from a stanproduction
model,namely,
but isthecertainly
good
for researches
usingfields.
negativetransport,
electrodes
and news
measuredfringing magnetic
The dard pion production model, but isthe high voltage power supplies of the beam profile became much sharper certainly good news for researches usARC/MUSE.

10

Hit z= 25.531 m

XMean= 0.084
XRMS= 1.78
Area= 6.02

8
6
4
2
0
Ð2
Ð4
Ð6
Ð8

Ð10
Ð10 Ð4

Fig.11.   A schematic view of D-line. Newly replaced components are DCSep, DQ4 and 7.

Ð2

0

2
x (cm)

4

Fig. 12.  A typical beam profile obtained by imaging
plate. σx=14 mm and σy =28 mm (left) andthe result of calculation (right)

hematic view of D-line. Newly replaced components are DCSep, DQ4 and 7.

Development of New Positron/Electron Detector System for Pulsed μSR
At pulsed muon facilities, muonscome in a pulse which decay into positrons or electrons as in µ± → e± + ν.
Muon spin relaxation (µSR) measuresthese e±'s in order to extract the time
evolution of the muon spin. The requirement for the positron/electron

detectors for pulsed µSR facility is
the least count-loss, despite the huge
event rate right after the arrival of muons (~100 Gcps at MUSE D-line).
In 2010, a prototypical detector
system (Photo 2) was developed andsuccessfully observed µ-e decay time

spectrum (Fig.13). This system will
eventually strengthen the existing detectors at µSR spectrometer DΩ-1 installed at D-line of J-PARC/MUSE.
The physica detector for e± is a plastic scintillator in which wave-length
shifting fiber collects the scintillation

Materials and Life Science Experimental Facility     J-PARC Annual Report 201026
light and delivers to a multi-pixel avaAnalogue board
lanched photo diode (APD). Analogueboard extracts the timing informationof e± events from APD and transfers it
to digital board. Main component ofdigital board is field programmablegated array (FPGA) in which time to
Detector block
Digital board
digital converter (TDC) and  multi-hit
event memory are configured.
Photo 2.  Prototypical new positron and/or electron detector system.
The event data is transmitted
to 13:
a Prototypical new positron and/or electron detector system.
Fig.
data acquisition PC as a series of SiTCP
Ethernet packets. The structure of thedata packet is the same with the existing system at DΩ-1, so that a seamlessexpansion of the detector system isgoing to be possible.

Fig. 14: The first -e decay time spectra taken by the prototypical detector system.
Fig. 13.  The first µ-e decay time spectra taken by the prototypical detector system.

K.M. Kojima1,2, A. Koda1,2 S.Y. Suzuki3, R. Kadono1,2, M. Miyazaki2, M. Hiraishi2, T. Murakami4, M.
Ikeno4, M. Saito4, T. Uchida4 and M. Tanaka4

Institute
Materials
StructureOxides
Science, High Energy Accelerator Research Organization (KEK-IMSS) and J-PARC,µSR Study on a Mott State
inoftheIridium
1

Tokai, Ibaraki, 319-1195, Japan
Recent findings of the novel2Shiraka-Shirane
insu- may2-4,
occur
in carrier-doped SO Mott in Ba2IrO4. As shown in Fig.15 and 16,
Department of Materials Structure Science, The Graduate University for Advanced Studies (SOK- ENDAI), 1-1 Oho,lating state in Sr2IrO 4 have raised at- insulators.
muon detected the antiferromagnetic
Tsukuba, Ibaraki, 305-0801, Japantention to the spin-orbit (SO) coupling
We succeeded in synthesizing order of Ir moments below TN~240 K.
3Computer Research Center (KEK-CRC), 1-1 Oho, Tsukuba, Ibaraki, 305-0801, Japan
which
hasStudy
flat IrO
We estimatedthe sizeof the Ir maginduced Mott state. This novel insulat4
2IrO4 and2 square latticInstitute of Ba
Particle
Nuclear(KEK-IPNS),
1-1 Oho, Tsukuba,
Ibaraki, 305-0801,
Japan
es
with
180o
Ir-O-Irbond
angles(Fig.14).
netic
momenttobe
0.34µB, whiching state is driven by large SO All
interare members of Open Source Consortium of Instrumentation: http://openit.kek.jp
action and modest on-site Coulomb The simpler structure of Ba2IrO4 is more is significantly reduced from the fullinteraction in the 5d electron system. suitable for studying the nature of SO moment (1 μB). The reduction is most
The SO driven Mott state has a simi- driven Mott insulating state than in likely due to a low-dimensional quantum spin fluctuation as in La2CuO4. The
lar total momentum Jeff = 1/2 with the Sr2IrO4.
parent materials of high-TC cuprates.
Using muon spin relaxation (µSR) ground state is therefore similar in two
Therefore, there is an expectation that at J-PARC/MUSE, we investigated the types of Mott insulators: cuprates andunconventional superconductivity antiferromagnetic order of Ir moments an Irridate.

der of Ir moments in Ba2IrO4. As shown in Fig.16 and 17, muon detected
ic order of Ir moments below TN~240K. We estimated the size of the Ir
J-PARC Annual
Report2010      Materials and Life Science Experimental Facility(1μo be 0.347μB, which is significantly reduced from the full momentB).
st likely due to a low-dimensional quantum spin fluctuation as in La2CuO4.
27
therefore similar in two types of Mott insulators: cuprates and an Irridate.
24
22
20
18
16

258 K

A(t) (%)

20

242 K

18
16
209 K

16
14
12
10

18
16
cture of BaFig.
is similarthat of La2CuO4 a parent compound of
2IrO
4 which14.  
Crystal structureof Bato2IrO4 which is14
similar to that of La2CuO4 a parent
12compound of high-Tc cuprate.
10
0
1

6.5 K

2

t (μs)

Fig.15.   Zero-field μSR spectra of Ba2IrO4.

0

1f (MHz)
2

3

258 K
242 K
222 K

1

209 K
181 K
150 K
138 K
54 K
25 K
6.5 K

0
0

4

Bμ (G)

2

200

Fourier Amplitude (a.u.)f (MHz)

3

50

100

150
T (K)

100

200

250

Fig. 16.   Temperature dependence of μSR frequency.

03Materials and Life Science Experimental Facility     J-PARC Annual Report 201028

Neutron Device
Two-Dimensional Scintillator Neutron Detectors for SENJYU (BL18)
A two-dimensional scintillator
neutron detector module with a large
detective area was successfully developed on the basis of the scintillator/
wavelength shifting (WLS) fiber technology for a time-of-flight Laue single
crystal diffractometer, “SENJU” instrument (BL18). The detector module accommodated the large detector head
while the electronics hardware, encoder and DAQ, were similar to thoseinstalled on the currently running iBIX
(BL03) instrument for system integrity
The WLS fibers were placed witha pitch of 4 mm in the detector headto create a neutron-sensitive area sizeof 256×256 mm2. The detector exhibited high detector efficiency of 40%
for thermal neutrons, suppressed the
gamma sensitivity down to 3×10 -6 byimplementing the dedicated signal
processing software into the encoder.  
Moreover, special care was paid to themagnetic shielding of the photomultipliers, ensuring the count rate stability
under the stray field of 200 gauss. The
detector performance was confirmedby the neutron diffraction pattern dataobtained with a single crystal sample
at BL10.
That detector performance enabled the SENJYU to cover the solid
angle over 4 sr around the sample
while maintaining a high spatial resolution, high detector efficiency, and low

Detector headgamma sensitivity.
The detector was also designed to
be as compact as possible resulting ina size of 300×300×300 mm and weightof 15 kg. This added flexibility to the instrument design and significantly lowered its cost. It helped the concept ofmovable detector bank which was oneof the unique features of the SENJU. 31
detector modules were delivered tothe beam line by the end of JFY 2011.

Signal processing& Encoder electronics

Amplifier /discriminator cards

Detector
DAQ
electronics

Photo 3.   A detector module for SENJU.

64
56

[112]

[012]

48

[103]

pixel

40

l
e
xi32
p

[013]
[001]

24

[103]

16

[013]

[102]

8
8

16

24

32

40

48

56

64

pixel
Fig. 17.   A two-dimensional data of the neutron diffraction from a single crystal tin sample measured with the SENJU detector module.

Photo 4.  Detector modules installed in the north bank of SENJU.

Particle and Nuclear Physics

Particle and Nuclear Physics     J-PARC Annual Report 2010

30

First results from Nuclear and Particle Physics: Pentaquark Search and T2K
In 2010, the first experiments werecarried out using the beam of the J-PARC
Main Ring (MR) accelerator to explore
the mysteries of fundamental nuclear
and particle physics: E19[1] and T2K[2].
E19 was an experiment conducted tosearch for the pentaquark.   The pentaquark is a hypothetical subatomic
particle consisting of four quarks andone antiquark bound together.  It is tobe compared to three quarks in normal
baryons.  In T2K, neutrinos were shot
295 km underground across Japan todetect the very tiny signals that muon
neutrinos transform into electron neutrinos.   With an enhancement in the
beam intensity and quality of MR, i.e.,
99.5% extraction efficiency at the Hadron Hall and stable operation of 145-kW
beam at the neutrino facility, a significant amount of data has accumulated.
The exciting first experimental results
have been released.
The pentaquark is one of the exotic hadrons. The discovery of an exotic hadron consisting of four or morequarks will shed light on the hadronstructure, which in turn will provide
information on the strong interactionsin the low energy region. Despite thefirst evidence for pentaquark Θ+ [3], theexistence of Θ+ has not yet been established. The J-PARC E19 experiment wasplanned to confirm the existence of Θ+and study its production mechanism
in a hadronic reaction with high mass
resolution.
The E19 experiment was performed at the K1.8 beamline of the
Hadron Experimental Facility. The
search for Θ+ in the p(π-,K-) reaction
was carried out using the missing masstechnique. A pion beam was irradiatedon a liquid hydrogen target. Scatteredkaons were identified using the superconducting kaon spectrometer (SKS).

A sensitivity of 75 nb/sr was achieved
with full statistics. The first physics run
was performed at a beam momentumof 1.92 GeV/c in the autumn of 2010, accumulating 16% of the aimed statistics
within 6 days of beamtime. The performance of the detectors was confirmed
to be good. In particular, a missing mass
resolution was estimated to be  1.4 MeV
in full width at half maximum for theΘ+ production mode by analyzing theΣ production data. This performance
was better than that of the original design. The missing mass spectrum forthe p(π-,K-) reaction is shown in Fig. 1.
No significant structure was observedat the mass of Θ+. Currently, the upper
limit of the production cross section isestimated to be 0.3 µb/sr at the 90%
confidence level. This upper limit issmaller by an order of magnitude thanthat estimated in the previous experiment [4]; however, it is comparable withtheoretical predictions. The upper limitof the decay width of Θ+ is given as ~1
MeV. The aim of the experiment is toachieve a sensitivity of 75 nb/sr whichcorresponds to the decay width of 0.2
MeV.
Neutrinos are ghost-like particles
having a neutral charge. They interact
with ordinary matter so weakly thatthey can travel through entire Earth at
the speed of light without disturbance.
Their mass is less than 1/1,000,000 of
the mass of electrons and the lightest
quarks. The three known types (flavors)of neutrinos are electron neutrinos (νe),
muon neutrinos (νµ), and tau neutrinos(ντ), corresponding to their charged
counterparts. Each of the neutrino flavor states appears as a superpositionof different mass states, and the difference in their extremely small masses
causes a periodic change in flavors dur-ing flight. This phenomenon is known
as neutrino oscillation.
The primary goal of T2K is the discovery of νµ-to-νe oscillation, which indicates that the mixing angle between
the first and third generations, θ13, tohave a finite value. To achieve this objective, T2K directs 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 SuperKamiokande detector (SK), which is located 295 km west of J-PARC. SK is theworld’s largest underground neutrino
detector, which contains 50,000 tonsof purified water as the target for theneutrino beam. The rare interaction
between neutrinos and nuclei in thewater can be detected by the ~11,000
photosensors fixed on the entire innersurface. The appearance of electrons in
the water, charged counterparts of theelectron neutrinos, is a clear sign of theνµ-to-νe oscillation.
The T2K physics experiment lasted
from January to the end of June 2010,
and after the summer shutdown, datacollection was resumed from November 2010 until March 11, 2011. During
the initial period, the J-PARC MR provided a stable beam of about 50 kW
and accumulated 3.2 × 1019 protons-ontarget (POT) in total. In the latter period,
the J-PARC succeeded in increasing thebeam power to 145 kW, which resulted
in accumulation of 1.45 × 1020 POT in
total.
An analysis of the initial dataset
showed that 33 beam-induced neutrino interactions were obtained at SK.
Thus far, one event has been selected
as a candidate for the electron neutrino appearance signal (Fig. 2); thebackground estimation was 0.30 ± 0.07
events. T2K achieved two important

J-PARC Annual Report 2010     Particle and Nuclear Physics

31
measurements towards the detection ground contamination with the detecof θ13 in 2011. One is the deficit of the tion of electron neutrino.
muon-like events compared with theThus, the path toward the discovexpectation from the null oscillation ery of finite θ13 has opened.
hypothesis. This deficit is consistent
with other measurements on the disap- References
pearance of muon neutrinos. The other [1] M. Naruki, Lect. Note Phys. 781, 139[1] M. Naruki, Lect. Note Phys. 781, 139 (2009).
(2009).
is the establishment of the low-back-[2] Launch of T2K experiment, KEK annual report 2009.
[3] T. Nakano et al., LEPS collaboration,
Phys. Rev. Lett. 91, 012002 (2003).
[4] K. Miwa et al., Phys. Lett. B635, 72(2006).

[2]

Launch of T2K experiment, KEK annual report 2009.

[3]

T. Nakano et al., LEPS collaboration, Phys. Rev. Lett. 91, 012002 (2003).

[4]

K. Miwa et al., Phys. Lett. B635, 72 (2006).

Fig. 1. Missing Mass Spectrum for p(π-,K-)
Fig. 1.  Missing Mass Spectrum for p(π-,K-) reaction.

reaction.

Particle and Nuclear Physics     J-PARC Annual Report 201032

Fig. 1.  Candidate for electron neutrino appearance.

Fig. 2. Candidate for electron neutrino appearance.

Helium Refrigerator for J-PARC Neutrino Superconducting Magnet Beam Line

Cryogenics

Cryogenics     J-PARC Annual Report 201034

Overview
The cryogenics section supports
scientific activities carried out at JPARC, in applied superconductivity
and cryogenic engineering in numerous ways, including the supply ofcryogens. The support works include

the operation of the superconducting
magnet system for neutrino beam line,
as well as the construction support ofthe superconducting solenoid system
for the Super OMEGA muon beam line
at the Materials and Life Science Experi-mental Facility (MLF). The research anddevelopment (R&D) works to support
for future projects in J-PARC are also
very active.

Operation and Construction Support
The cryogenics section operates
the superconducting magnet system

for the neutrino beam line. The operation record for Japanese fiscal year

(JFY) 2010 is summarized in Table 1.

Table 1.   Operation history of the superconducting magnet system for the J-PARC neutrino beam line.
2010.4.1~2010.6.25

Steady state operation (beam operation)

2010.6.26~2010.7.2

Warm up operation

2010.7.3~2010.10.17

Maintenance2010.10.18~2010.10.26

Cool down operation

2010.10.27~2010.12.27

Steady state operation (beam operation)

2010.11.28 16:13

Beam induced quench

2010.11.28 18:25

Operation resumed

2010.12.15 6:12

Interlock by false signal from a vacuum sensor

2010.12.15 8:25

Operation resumed

2010.12.28

Liquid Helium recovery operation

2010.2.29~2011.1.6

Short shutdown

2011.1.7~2011.3.11

Steady state operation (beam operation)

2011.2.5 8:18

Interlock by current lead operation error

2011.2.5 13:23

Operation resumed

2011.3.11 14:50

Shutdown by the Great East Japan Earthquake

2011.3.12~2011.3.31

Investigation of the system healthiness

The system had been operated
regularly till The Great East Japan
Earthquake with the exception of threeinterlock incidents that caused magnet shut downs. In all three incidents,
the safety system worked properly, no
major damages were observed, andthe regular operations were resumed
within a few hours. At the time of theearthquake, the system had the beam
shut down automatically and safely.

After the shutdown the helium was recovered to the buffer tank and no major helium leakage was detected. The
investigation of the system’s healthhas been taking place after the earthquake. No major damage has been detected by the end of April 2011.
The section also supports the Superconducting Kaon Supectrometer(SKS) operation. Its major contribution
is the liquid helium supply for the cool

down operation of the SKS. The liquid
helium supply issues will be reported
in the cryogen supply part.  
The section also supports the operation and the construction of theMuon Beam Line in MLF. Especiallythe construction support for the SuperOMEGA muon beam line was the major support job for the section in JFY
2010.

J-PARC Annual Report 2010     Cryogenics

35

R&D for the Future J-PARC Projects COMET
A new experiment, COherent
Muon to Electron Transition (COMET)
has been proposed to search for coherent neutrino-less conversion of muons
to electrons using the high intensity
proton beam from J-PARC Main Ring.
The Cryogenics Section has been involved in the COMET experiment todevelop the superconducting magnet
system. The project requires a large
aperture solenoid that covers a pion
production target. A solenoid using an
aluminum stabilized superconducting
cable was proposed and R&D works
have been carried out. A major issue for
the R&D is that irradiation of neutron to

the solenoid. The neutron irradiation
test at Kyoto University Research Reactor Institute has been started to investigate RRR degradation in stabilizer
aluminum in Japanese fiscal year (JFY)2010.

superconducting solenoid magnet is
expected to play an important role tostorage muon beam in this experiment,
and the development has been started
with cooperation between IPNS andCryogenics Science Center since JFY
2009. In addition to the g-2 project, a
new experiment that measures Hyper
Fine Structure of Muon (HFS experiment) was proposed in JFY 2010 in corporation with the g-2 group and theMuon Science Division of Institute ofMaterials Structure Science in KEK. The
experiment also requires high precision magnetic field, but with narrower
volume. It was proposed to build thesolenoid for the HFS experiments as ansmaller prototype of g-2 solenoid. The
design of the solenoid (Fig.1) was madein JFY2010 by the Cryogenics Section
and the construction is planned to be
started in JFY2011.

g-2 and HFS
The anomalous magnetic momentof the muon is directly sensitive to electromagnetic, strong, and weak forces,
and the precise measurement of g-2
might lead the new physics beyond
the standard model. An experiment at
J-PARC to measure the g-2 value witha very high sensitivity level of 0.1 ppm
has been proposed by the group in theInstitute of Particle and Nuclear Physics Studies (IPNS). A very high precision

Z[m]
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
-0.2

0.0

0.2

0.4

0.6

0.8

1.0

1.2

Fig. 1.  Magnetic design of HFS solenoid.

1.4

1.6
R[m]

Cryogenics     J-PARC Annual Report 201036

Cryogen Supply at J-PARC
facility, constructed and operated by
the Cryogenics Section. Figure 2 summarizes the liquid helium supply in
JFY 2010. The major user of the liquid
helium is SKS. The helium gas recovery rate was better than 90 % until The
Great East Japan Earthquake on March
11. After the earthquake the electricity,

The Cryogenics Section provides
cryogens for physics experiments in
J-PARC. The liquid helium is supplied
to the users in corporation with the
Accelerator Division of J-PARC using
the Helium liquefier owned by the Accelerator Division. The used helium isrecovered by the helium gas recovery

as well as the helium recovery facility,
was down for several weeks and all thehelium stored in the SKS magnet andpart of the helium stored in the dewers
were lost. The amount of helium loss
and the damages to the facility are still
under investigation.

5000
Neutron group

4500

Muon group
Hadron group

4000

Liquid Helium (L)

3500
3000
2500
2000
1500
1000
500
0

4

5

6

7

8

9

10

11

12

1

Month
Fig. 2. Liquid
HeliumSupplyat J-PARC
in FY2010
Fig. 2.  Liquid
heliumsupplyat J-PARC
in JFY 2010.

2

3

Newly developed “J-PARC” server vulnerability inspection system

Information System

Information System     J-PARC Annual Report 2010

38

Overview
Since 2002 a J-PARC network infrastructure called JLAN has been operated independently from KEK LAN and
JAEA LAN for J-PARC public users andstaffs in terms of logical structure andoperational policy.   The Information
System Section designs, manages andoperates the network system and also
has activity of Authentication Systemand 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.

Statistics of Network Utilizationnecting the Tokai area, where main
J-PARC facilities were built, and the Tsukuba area, where the major computerresources for data analysis are located.
Figure 2 shows the annual data transfer statistics between the two sites.  
The bandwidth for the connection is

2 Gbit/s (250 Mbytes/s) and still leaves
enough margin for an upgrade of theaccelerator intensity improvementin terms of average bandwidth in thenear future.

200
180
160

Edge Switches

2500

WLAN Access Points
Number of Hosts on JLAN

2000

120
100

1500

80

SW

WLAN AP

140

3000

No. of Hosts

In 2010 the total number of hosts
on JLAN exceeded 2700 and was still
increasing at a rate of 130% per year.  
The growth curve of edge switches,wireless LAN access points and hosts
connected to JLAN are shown in Fig.1.  
JLAN has also an important role in con-

1000

60
40

500

20
0

JFY2002 2003

2004

2005

2006

2007

2008

2009 FY2010

0

Fig. 1.  Growth of J-PARC network

Transfer Rate (MBytes/sec)

250
200

Bandwidth upper limit 2 Gbps = 250 MB/s
Red Line : 2 hours average
Blue Line : 5 min. peak

150
100
50
0
21-Jun 21-Jul 20-Aug 19-Sep 19-Oct 18-Nov 18-Dec 17-Jan 16-Feb
Date

Fig. 2.  Average Data transfer rate in Tokai-Tsukuba  connection

J-PARC Annual Report 2010     Information System

39

Statistics of Computer Resource Utilization
J-PARC does not have its own computing facility, but it has been provided
with the opportunity to shares with KEK
their computing resources of 1600 SPECint06 computing power, 150 TBytes
RAID disks and 2 PBytes tape libraries in KEK Central computer system at
the Tsukuba site.  In the Neutrino andHadron experiments, data taken in the
J-PARC experimental hall will be tem-porary saved at the Tokai site and thenpromptly transferred to, stored andanalyzed at the system in Tsukuba. The
storage of the system will also be utilized as a permanent data archive for
MLF experiments. Figure 3 and 4 show
the utilization statistics of the computer resource in 2010. The Hadron users
who mainly used the system constantly
were users who continued their seriesof experiments (Koto Exp. Group) fromthe former KEK 12 GeV Proton synchrotron to J-PARC.  The Neutrino experiment group just started to use thesystem after the autumn run and they
are steadily accumulating their data toreach up to 42 Tbytes in 2010. The MLF
users are testing the system and still depend only on local computing resources at the Toukai area.

Disk Utilization
100.00TBytes

10.00

1.00

J‐PARC Hadron(mainly koto Gr.)J‐PARC neutrino
J‐PARC MLF

0.10

0.01
Feb-09 Apr-09 Jun-09 Aug-09 Oct-09 Dec-09 Feb-10 Apr-10 Jun-10 Aug-10 Oct-10 Dec-10 Feb-11

Fig. 3.  Disk utilization of KEK Computer system by J-PARC Groups

Tape Utilization

1000
100

TBytes

10
1
0.1
0.01
0.001
0.0001

J‐PARC Hadoron koto(E14)
J‐PARC neutrino
J‐PARC MLF
Feb-09 Apr-09 Jun-09 Aug-09 Oct-09 Dec-09 Feb-10 Apr-10 Jun-10 Aug-10 Oct-10 Dec-10 Feb-11

Fig. 4.  Tape utilization of KEK Computer system by J-PARC Groups

Information System     J-PARC Annual Report 201040

Upgrade of SINET and IBBN Network and the Near Future
JLAN Upgrade Plan
In March 2011, the National Institute of Informatics (NII) has upgraded
SINET (Japan Science Information Network http://www.sinet.ad.jp) which is
the main J-PARC network doorway to
the Internet from version 3 to 4. Thanks
to the NII support of J-PARC through theupgrade, the J-PARC network has obtained the possibility of a 10 Gbps network bandwidth both to the internet

and to the Tokai-Tsukuba interconnection that previously was 1 and 2 Gbps,
respectively.  In the same month, IBBN
(Ibaraki BroadBand Network (http://
www.pref.ibaraki.jp/ibbn/)) which is utilized for backup line for the SINET was
upgraded from 100 Mbps to 1 Gbps too.
In order to realize the potentialof these upgrades and the increased
bandwidth, the J-PARC network itself

also should be upgraded, so the replacement of the J-PARC network from
100 Mbps edge switches to 1 Gbps
switches is being planned for the next
summer (2012). The near future plan
for replacing a trunk network of JLAN
called Phase2 JLAN, the KEK computer
system, and the J-PARC mail system isshown in Fig.5.

Damage and Recovery from The Great East Japan Earthquake
JLAN itself sustained quite a little
damage during The Great East Japan
Earthquake on March 11. The network
facilities, all fiber cables between the
JLAN core network switch and theedge switches deployed around JPARC related buildings and computerresources in KEK did not suffer serious
damages. However, because the upper structure of an electric transformer,

which supplied the JLAN core systems,
was heavily damaged (Fig.6), it took 11
days to recover the JLAN functionality.

Internal 100 M → 1 Gbps
External1~2 G → 10 Gbps
2011

2012

2013

2014

2015

2016

1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4Current System
Phase2 JLAN
Phase3 JLAN
External Connection
SINET3 (TOKAI node) 1Gbps connection
SINET4 (TOKAI node) 10Gbps connection
SINET5Mail System
Current System
Next mail System
Next next mail system
Data Analysis Computer system
Current KEK Central Computer
Next KEK Central Ccomputer

Fig. 5.  Near future schedule of J-PARC network and computer resources

Fig. 6.  A wall collapse of  the information systemcenter to a power trans retarded  recoveryof  J-PARC information system.

Transmutation Studies

Transmutation Studies     J-PARC Annual Report 201042
The Japan Atomic Energy Agency(JAEA) has been conducting researchand development (R&D) on an accelerator-driven subcritical system (ADS)
as a dedicated system for the transmutation of long-lived radioactive nuclides. The ADS proposed by JAEA is
a lead-bismuth eutectic (LBE) cooled,tank-type subcritical reactor with thethermal power of 800 MWth driven by
a 30 MW superconducting linear accelerator (Linac). Various R&D for ADS
are under way in JAEA. As the next step
before going to the large-scale demonstration of ADS, the Transmutation
Experimental Facility (TEF) is planned

as the Phase-2 of the J-PARC project.
In the Transmutation Section, activities
related to LBE technology and materialscience have been performed, we also
worked on the design study of the experimental facility.

For instance, we observed decreasingof the LBE flow-rate and a minor leakage of LBE at the oxygen sensor. To
resolve these problems, some modifications and renovations were applied
to JLBL-1: replacement and positionchange of the oxygen sensor, maintenance of Electro-Magnetic Pump (EMP)
and exchange of filters. After that, we

will conduct a test operation. Tests forthe oxygen sensors (Photo 1) and theoxygen concentration control system
will be done in the near future. The
final goal is to perform corrosion/erosion test under the oxygen concentration controlled condition.

Activities
Modification of JLBL-1
In JAEA, to evaluate the feasibilityof structural materials and to develop
a LBE handling technique, the JAEA
Lead-Bismuth material corrosion Loop
(JLBL-1) was built in 2001. Since then,the device has operated for over 26,000
hours and performed 7 phases of material corrosion tests. Recently, the performance of the loop has deteriorated.

Photo 1.  Two oxygen sensors were installed between the cooler and the surge tank.

Fundamental Study for Flow Visualization in Opaque Liquid Metals
The ADS proposed by JAEA utilizes
LBE as a target material and a coolant.
The beam window of ADS is exposed
to severe environment consisting of
the incidence of the proton beam external pressure by the LBE flow and theinfluence of corrosion. Grasping the
LBE flow is essential for the detailed
design of ADS because the flow behaviour closely relates not only to the thermal-fluid characteristic but also to theerosion/corrosion. Because of a lack ofexperimental data for the validation ofthis numerical analysis, the estimate of
the reliability of a beam window design
was insufficient. The flow measurement of the general liquid metals in ahigh temperature condition was diffi-

J-PARC Annual Report 2010     Transmutation Studies

43
cult because of its physical characteristics. In the Transmutation Section, flow
visualization techniques have beendeveloped by using ultrasonic. The development of three elements is necessary to realize the measurement thatassumes actual environment. The firstone is development of heat-resistantimprovement of the ultrasonic transducer. The maximum temperature of
the present transducer for flow measurement is about 250 degrees. On theother hand, the minimum temperatureof ADS in operating condition is 300
degrees (the maximum is about 500
degrees.). Because of that, we started
the development of a transducer using Li oxide element (Photo 2). The
second one is the wetting problem in
LBE and structural materials boundary.
However, this one was settled easily
by past studies and development. The
final one is development of a velocity
measurement technique. The maximum limit of measurable velocity ofthe present method which utilizes the

Doppler Effect is about 2,000 mm/s.
The advanced method utilizes the correlation of the echo waves reflectedfrom the measurement medium forcalculation of the velocities. Moreover,this method would anticipate the decrease of the time resolution (about
one place), because it needs only several times of emitting/reception ofultrasonic signals for a velocity profile
measurement.

Photo 2.  Prototype transducer using Li oxide element.

Thermal Fatigue Problem of the Fuel Claddings for ADS
The Transmutation Section is also
conducting a design study on the ADS
for transmutation of long-lived nuclear
wastes. In the design study of ADS, oneof the most important factors is the
maximum temperature of the fuel cladding. In our design, the fuel claddings
are made of Mod.9Cr-1Mo steel, andtheir maximum temperature is limited
to below 550 °C to mitigate the corrosion by LBE. In addition, the integrity of

the fuel claddings should be evaluated
not only for a steady state but also fora transient state. Especially, frequent
beam trips, as experienced in existinghigh-power proton accelerators, areconsidered problematic because they
may cause thermal fatigue of the fuelcladdings for ADS.
The evaluation results showed thatthe structural strength of the fuel claddings could be sufficiently kept under

the conditions of both steady and transient state, if we do not consider irradiation effects. While irradiation effects
on material properties are considered
not so serious under the practical condition of the ADS based on conclusions
from the existing irradiation data, it isimportant to accumulate further experimental data about material irradiation by protons and neutrons.

specimens was carried out at Reactor
Fuel Examination Facility (RFEF) in the
Tokai Research and Development Centre, JAEA. The fracture surface observation on the bend-fatigue specimensof austenitic steels was conducted byusing Scanning Electron Microscopy(SEM). The fracture surface of Japan
Primary Candidate Alloy (JPCA) specimens irradiated up to 19.5 dpa showed
ductile morphology, while Alloy800H
specimens irradiated over 11 dpa
showed partially inter granular fracturesurface.

Post Irradiation Test
To obtain the irradiation data on
structural materials of spallation target,
an international experimental program
called “STIP” (SINQ Target Irradiation
Program, SINQ; Swiss spallation neutron source) is in progress. Post Irradiation Examination (PIE) of STIP

Transmutation Studies     J-PARC Annual Report 201044

MEGAPIE
The world’s first megawatt-classlead-bismuth target, MEGAwatt Pilot
Experiment (MEGAPIE), was successfully dismantled at the Zwischenlager
Würenlingen AG (ZWILAG) hot-lab andtransported to Paul Sherrer Institute(PSI) hot-lab in April 2011. Several meetings on MEGAPIE were held at Luzern,

Switzerland in September 2010. In themeetings, the dismantling process of
the MEGAPIE target and the related
hot-lab activities were reported. It became clear that the sample transport
will be scheduled for May 2012. The results of the 2nd Round Robin Test (RRT)
were also reported. The data from thefive institutes were consistent witheach other within bands which weremuch narrower than that of 1st RRT.
The revised sample extraction plan andthe preliminary distribution plan were
distributed.

SafetySafety     J-PARC Annual Report 2010

46
J-PARC is a proton accelerator complex with various experimental facilities, which 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 andTechnology (MEXT), and the related
safety inspection must be conductedby the Nuclear Safety Technology Center (NUSTEC). By the end of Japanese
fiscal year (JFY) 2009, we have alreadysubmitted five applications to MEXT
and received permission to deliver the
3 GeV/250-kW proton beams to theMaterials and Life Science Experimental Facility (MLF), and 30 GeV/100-kW
proton beams to the Neutrino facilities.
In JFY 2010, two applications
shown in Table 1 were submitted to
MEXT. In the first application, we submitted a request for usage of two experimental beam lines (BL-11 and -15) in
MLF, and increase of the proton beam

intensity of Linac, 3-GeV rapid cycling
synchrotron (RCS), 50-GeV proton synchrotron ring (MR), MLF and Neutrino
experimental facilities. We submitted
the application to MEXT on June 24,
2010, and all items we applied for wereapproved on August 27, 2010. In thesecond application, a request for usage of three experimental beam lines(BL-02, -17 and -18) in the MLF and increase of the proton beam intensity of
Hadron experimental facility was also
submitted on December 15, 2010, andthe item was approved on February 25,
2011.
As the five-year anniversary of radiation management is approaching in
J-PARC, the first periodical inspection
was carried out by NUSTEC on January 2011, to make sure that radiation
installations are maintained in compliance with the technical standards
established by the Radiation Hazards
Prevention Law (see Photos 1 to 4). On
the site, confirmation of the installation

situation of the sign, operation tests
on the safety interlocks, and measurement of the radiation dose rates were
done. In addition to them, the records
concerning the radiation management
such as operating logs, exposure andeducational records of radiation workers, etc. were checked. All items weredeemed to be appropriate. Finally, JPARC passed the inspection.
Fig. 1 shows the transition of thenumber of radiation workers since2005. In JFY 2010, 2653 individuals
were registered as radiation workers in
J-PARC (about 23% increase comparedwith those in JFY 2009). Table 2 shows
the distribution of annual doses by typeof 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 41 persons(1.5% of the workers) were recorded inless than 1.0 mSv.

Table 1. Application items for license in JFY 2010

Accelerator/Facility

item

Application (1)submitted : Jun. 24, 2010
approved : Aug. 27, 2010

Application (2)submitted : Dec. 15, 2010
approved : Feb. 25, 2011

Linac

max. accelerating
particlesfrom 2.6x1018 /h (@17 kW)
to 3.6x1018 /h (@23 kW)-

3GeV RCS

max. accelerating
particlesfrom 2.0x1018 /h (@260 kW)
to 2.6x1018 /h (@350 kW)-

MR

max. accelerating
particlesfrom 7.5x1016 /h (@100 kW)
to 2.3x1017 /h (@300 kW)-

max. particles

from 1.9x1018 /h (@250 kW)
to 2.4x1018 /h (@320 kW)-

Experimantal
beam line

Add 2 Beam lines(BL-11 and BL-15)

Add 3 Beam lines(BL-02, BL-17 and BL-18)

max. particles-

from 3.8x1015 /h (@5 kW)
to 3.8x1016 /h (@50 kW)

Experimantal
beam line--

max. particles

from 7.5x1016 /h (@100 kW)
to 2.3x1017 /h (@300kW)-

MLF

HadronNeutrinoJ-PARC Annual Report 2010     Safety

47

Photo 1.  Safety inspection by NUSTEC (1)Photo 2.  Safety inspection by NUSTEC (2)Photo 3.  Safety inspection by NUSTEC (3)Photo 4.  Safety inspection by NUSTEC (4)Number of radiation workers
3,000

Number of radiation workers

2653
2,500
2,000

Female
Male

2154
1864

1,500
1,000
704
408

500
61
0

2005

2006

2007

2008

2009

Japanese Fiscal Year (JFY)

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

2010

Safety     J-PARC Annual Report 201048
Table 2. Distribution of annual doses by the type of worker in JFY 2010

Dose range (mSv)

Collective
dose
Total
worker (person-mSv)

Averagedose(μSv)

Undetectable

0.1
- 0.5

>0.5
- 1.0

>1.0
- 5.0

>5.0+

In-house staff

542

10

0

0

0

552

1.5

2.7

User

658

0

0

0

0

658

0

0

Contractor

1412

28

3

0

0

1443

7.1

4.9

Total

2612

38

3

0

0

2653

8.6

3.2

Users OfficeUsers Office     J-PARC Annual Report 201050
The birth of the J-PARC Center
Users Office (UO) dates back to 2007
when the J-PARC Center was organized. It has been part of the Users
Affairs Section expected to offer onestop services to the J-PARC users. The
number of the J-PARC users has been
increasing and in 2010 the number ofannual users counted by person-daysreached 29,000. The UO has wideranging tasks which cover from calls
for proposals to accepting and managing experimental reports.
To perform the tasks, the UO wasstaffed in 2010 with 14 members including 3 system engineers and one
Ibaraki prefecture staff. Of course,
increasing the number of the staff
was not the only way to deal with its
increasing tasks. Taking the limited
budget and human resources into
consideration, other ways should beconsidered. Introducing a web-based
system and making the most out of its
advantages and the UO website wasone of the answers.
When the experimental reportmanagement system started its operation in 2010, all the main four webbased systems were already available.
They were proposal submission system, proposal review system, user support system and experimental reportmanagement system. Using the proposal submission system, proposals
could be submitted 24 hours and themessages of acceptance or requestingcorrection could easily be sent by thesystem. The proposal review systemfacilitated the proposal review processby organizing the proposals and forwarding them quickly and accurately
to the referees. There were some procedures the J-PARC users needed togo through such as submitting theletter of agreement, procedures forentering the J-PARC, accommodation
reservation, procedures for J-PARC network use if needed, etc. User support
system was adopted to execute theseprocedures effectively. In 2010 the UO
website was renewed. Information for
the users could easily be found on the
top page and icons to log into the user
support systems were displayed on
the top page together with detailed
contents revisions. Experimental report management became easy oncethe experimental report management
system was adopted. Three system engineers were engaged in developing
and operating the four systems.
Among the procedures or works
were those the UO staff themselves
needed to deal with, such as user
registration approval, issuing J-PARC
user ID cards, preparing glass badges,
arranging safety instruction, or procedures for the J-PARC network use.
Those procedures were dealt with by
UO staffs. Although important or urgent information was posted on the
UO website, the best way of informing
the users would be by sending email totheir PCs respectively. The UO generated a mailing list of the users who had

approved accepting information byemail, and such information began to
be sent by one of the J-PARC advisors.
When travel expenses support was applied for by inter-university research
institute user KEK had accepted, theUO staff calculated its amount. User
data management and collecting user
statistics were also UO’s tasks. Its staff
collected fundamental user statistics
from the standpoints of organizations,facilities, Japanese versus foreigners.
They cover the period from December
2008 to the present.
The J-PARC Center Users OfficeCommittee was held on August 26,
2010, it deliberated the measures
to take for J-PARC users’ requests onquestionnaire concerning accommodations and transportation of the JPARC conducted in June 2010. One of
the main requests was to resolve theaccommodation shortage. KEK constructed a new user dormitory with 49
rooms at the Ibaraki Quantum BeamResearch Center as shown in Photos
1 to 4, which was opened in January
2011. Its rooms are booked throughthe user support system. The UO was
responsible for part of its operations.
Another request was to deal with thedark places with no lights on the way
from J-PARC to Masago International
Lodging. Eight lights were set up in
December, 2010 at intervals of 30 m.
And two old lights near Masago International Lodging were replaced withbrighter ones for Route 245.

J-PARC Annual Report 2010     Users Office51

Photo 1.  View of dormitory.

Photo 2.  Entrance of the dormitory.

Photo 3. A bed in a room.

Photo 4.  A desk and a chair in a room.

(1) Users in 2010 (according to organizations, person-days)
Japanese Universities
Public Organizations

2,500

Private Enterprises

Japanese Universities

2,000

Foreign Organizations
11,995

Public Organizations

1,500

Private Enterprises
Foreign Organizations

1,000

14,730

500

885

0

1,420

4 5
2010

6

7

8

9 10 11 12 1 2
20113(2) Users in 2010 (according to facilities, person-days)
MLF
HadronNeutrino
Accelerator

1,978

5,558

2,500
MLF
HadronNeutrino
Accelerator

2,000
1,500

15,923

5,571

1,000
500
0

4 5 6 7 8 9 10 11 12 1 2 3
2010
2011

Users Office     J-PARC Annual Report 201052(3) Users in 2010 (Japanese · Foreiners, person-days)
4,000

Foreigners

3,500Japanese

3,000
2,500
2,000
1,500
1,000
500
0

4
2010

5

6

7

8

9

10

11

12

1
2011

2

3

User Program

User Program     J-PARC Annual Report 201054

1. Proposal Reviewing System for the MLF User Program
J‐PARC Steering Committee
Users
ProposalAcceptance andResult Notification

Proposal
Submitting

J‐PARC Center

Proposals to
Ibaraki‐Prefecture
Beam Lines arereviewed by MLF‐PAC.

J‐PARC
Director

Users Office

MLF Advisory BoardKEK Inter‐University
Research Use Programs arereviewed by MLF‐PAC.
KEK IMSS director shallapprove the results.

Neutron Science
Proposal Review Committee

Muon Science
Proposal Review Committee

Sub‐Committees

Sub‐Committees

Referees

Referees

JAEA entrusts review
of its own program
to MLF‐PAC.

Call for proposals for the first half of 2010 (2010A term): Dec. 1, 2009- Jan. 7, 2010
The review results were announced on April 16, 2010.
Call for proposals for the first half of 2010 (2010B term): May 17- Jun. 7, 2010
The review results were announced on September 29, 2010.

2. Summary of Applications and Review Results (MLF)
Number of proposals and beamtime applied to each neutron andmuon instrument for the 2010A and2010B terms are summarized by eachaccess mode in the following graphs.
For the neutron instruments BL-03 andBL-20 which are operated by Ibaraki
Prefecture, a specific program is con-ducted by Ibaraki Prefecture separately.  The statistics for the specificprogram by Ibaraki prefecture is also
included in this summary.

(1)  2010A
Not Accepted
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
Not Accepted
Instrument Group/Project Use
General Use (accepted)
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
General Use (accepted)

Number of Proposals

60
50
40
30
20
10
0

BL-01 BL-03 BL-04 BL-08 BL-10 BL-14 BL-16 BL-19 BL-20 D1･D2
Instruments

J-PARC Annual Report 2010     User Program

55
Not Accepted
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
Not Accepted
Instrument Development/Project Use
General Use (accepted)
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
General Use (accepted)

120

Beam Time (days)

100
80
60
40
20
0
BL‐01 BL‐03 BL‐04 BL‐08 BL‐10 BL‐14 BL‐16 BL‐19 BL‐20

D1

Instruments(2)  2010B
Not Accepted
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
Not Accepted
Instrument Group/Project Use
General Use (accepted)
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
General Use (accepted)

40
Number of Proposals

35
30
25
20
15
10
5
0

BL‐01 BL‐03 BL‐04 BL‐05 BL‐08 BL‐10 BL‐12 BL‐14 BL‐16 BL-19 BL-20 BL-21 D1･D2
Instruments

140

Not Accepted
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
Not Accepted
Instrument Group/Project Use
General Use (accepted)
Specific Program for BL03 and BL20 by
Ibaraki Prefecture
General Use (accepted)

120

Beam Time (days)

100
80
60
40
20
0

BL‐01 BL‐03 BL‐04 BL‐05 BL‐08 BL‐10 BL‐12 BL‐14 BL‐16 BL-19 BL-20 BL-21 D1･D2
Instruments

User Program     J-PARC Annual Report 201056

3. Access Mode for MLF Use(1) General use
The general use provides both local and international users with opportunities to conduct experiments. A variety ofexperiments are accepted both for academic researches and for industrial applications.
(2) Project use
The project use provides JAEA and KEK with opportunities to conduct their main-task-oriented programs such as inclusive scientific research projects, research programs proposed to fulfill the plans for midterm goals of JAEA, joint research
programs and contract research programs with other institutes or organizations. The principal researchers in the project use
may request beamtime, which is longer than one year.
(3) Instrument group use
The instrument group use provides the instrument scientists responsible for the beam-line instruments with opportunities to maintain and/or improve the performance of their instruments and conduct leading-edge research and development
which would ensure maximum performance of the instruments so that MLF can always provide users with the most superior
experimental conditions.

4. Process for Approving Experimental Programs in Particle and Nuclear
Physics

Council for IPNS

Institute of Particle
and Nuclear Studies(IPNS) at KEK

elect
the members

Program Advisory Committee 㽴
(PAC)

IPNS
Director

㽲 Submission
㽳 Evaluation Request
㽴 Evaluation Request
㽵 Evaluation Result
㽶 Evaluation Report
㽷 Reply to Users

㽳
J‐PARC Center
㽶
㽷

㽵

㽲

J‐PARC User

The tenth Program Advisory Committee (PAC) meeting was held on July 16 – 18, 2010.
The eleventh PAC meeting was held on January 14 – 16, 2010.

J-PARC Annual Report 2010     User Program

57

5. Approval Summary of the Particle and Nuclear Physics Experiments
after the 11-th meeting (January 14, 2011)(Co-)
Spokespersons

Affiliation

Title of the experiment

Approval status Slow line priority(PAC recomDay1 Beamline
Day1
mendation)
Priority

E03

K.Tanida

Kyoto U

Measurement of X rays from X- Atom

Stage 2

K1.8

P04

J.C.Peng;
S.Sawada

U.of Illinois at Urba- Measurement of High-Mass Dimuon Production at the 50na-Champaign; KEK GeV Proton Synchrotron

DeferredPrimary

E05

T.Nagae

Kyoto USpectroscopic Study of Ξ-Hypernucleus, 12ΞBe, via the 12C(K-,K+) Reaction

Stage 2

E06

J.Imazato

KEK

Measurement of T-violating Transverse Muon Polarization in
K+ -> p0 m+ n Decays

Stage 1K1.1BR

E07

K.Imai,K.Nakazawa,
H.Tamura

Kyoto U, Gifu U,
Tohoku U

Systematic Study of Double Strangeness System with an
Emulsion-counter Hybrid Method

Stage 2K1.8

E08

A.Krutenkova ITEP

Pion double charge exchange on oxygen at J-PARC

Stage 1K1.8

E10A. Sakaguchi,
T. Fukuda

Osaka U

Production of Neutron-Rich Lambda-Hypernuclei with the
Double Charge-Exchange Reaction (Revised from Initial P10)

Stage 2

K1.8

E11

T. Kobayashi

KEK

Tokai-to-Kamioka (T2K) Long Baseline Neutrino Oscillation
Experimental Proposal

Stage 2neutrino

Day1

Day1

1

2

K1.8

E13

T.Tamura

Tohoku U

Gamma-ray spectroscopy of light hypernuclei

Stage 2

E14

T.Yamanaka

Osaka U

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

Stage 2K1.8

E15

M.Iwasaki,
T.Nagae

RIKEN, Kyoto

A Search for deeply-bound kaonic nuclear states by in-flight
3He(K-, n) reaction

Stage 2

E16

S.Yokkaichi

RIKEN

Electron pair spectrometer at the J-PARC 50-GeV PS to explore the chiral symmetry in QCD

Stage 1

E17

R.Hayano,
H.OutaU Tokyo, RIKEN

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

Stage 2

E18

H.Bhang,
H.Outa,H.Park

SNU, RIKEN, KRISSCoincidence Measurement of the Weak Decay of 12LC and theStage 2three-body weak interaction process

E19

M.Naruki

KEKHigh-resolution Search for Q+ Pentaquark in p-p -> K-X Reactions

Stage 2

E21

Y.KunoOsaka U

An Experimental Search for μ − e Conversion at a Sensitivityof 10−16 with a Slow-Extracted Bunched BeamStage 1

New
beamline

E22

S. Ajimura,
A.Sakaguchi

Osaka U

Exclusive Study on the Lambda-N Weak Interaction in A=4
Lambda-Hypernuclei (Revised from Initial P10)

Stage 1

K1.8

T25

S.Mihara

KEK

Extinction Measurement of J-PARC Proton Beam at K1.8BR

Test Experiment

P26

K.Ozawa

U TokyoSearch for ω-meson nuclear bound states in the π-+AZ ->n+(A-1) ω(Z-1) reaction, and for ω mass modification in the
in-medium ω->π0γ decay.

Stage 1

K1.8

E27

T.Nagae

Kyoto U

Search for a nuclear Kbar bound state K-pp in the d(p+, K+)
reaction

Stage 2

K1.8

P28

H.Fujioka

Kyoto U

Study of isospin dependence of kaon-nucleus interaction by
in-flight 3He(K- ,n/p) reactions

approved as apart of E15

K1.8BRP29

H.Ohnisi

RIKEN

Search for φ-meson nuclear bound states in the pbar + AZ ->φ + (A-1) φ(Z-1) reaction

Stage 1

K1.1

E31

M.NoumiOsaka USpectroscopic study of hyperon resonances below KN threshStage 1
old via the (K-,n) reaction on Deuteron

K1.8BR

T32

A. Rubbia

ETH, Zurich

Towards a Long Baseline Neutrino and Nucleon Decay Experiment with a next-generation 100 kton Liquid Argon TPC
detector at Okinoshima and an intensity upgraded J-PARC
Neutrino beam

Test Experiment

P33

H. M. SHIMIZU KEK

Measurement of Neutron Electric Dipole Moment

Deferred

Linac

P34

N. Saito,
M. Iwasaki

KEK, RIKENAn Experimental Proposal on a New Measurement of theMuon Anomalous Magnetic Moment g-2 and Electric Dipole
Moment at J-PARC

Deferred

MLF

P35

T.Kajita

ICRR,Tokyo

A test experiment to measure sub-GeV flux in the on-axis
direction at the J-PARC neutrino beam

to be Decidedby E11 and Lab

KL
Day1

K1.8BR
High pDay1

K1.8BR
K1.8

Day1

will be coordinated by JPNC

schedule andbeam time will
be coordinatedby JPNC

K1.8

K1.8BR

K1.1BRneutrino

User Program     J-PARC Annual Report 2010

58
(Co-)
Spokespersons

Affiliation

Title of the experiment

Approval status Slow line priority(PAC recomDay1 Beamline
Day1
mendation)
Priority

E36

S.Shimizu

Osaka

Measurement of Γ(K+ -> e+ ν)/Γ(K+ -> μ+ ν) and Search forStage 1heavy sterile neutrinos using the TREK detector system

T37

K.InamiNagoyaTest of TOP counter for B-factory upgrade

T38

T.Nanjo

Kyoto

Test ExperiProposal for Measuring Hadron Response at K1.1BR for KOTO
ment
Experiment(completed)

P39

K.Sakashita

KEK

A study of water Cherenkov detector for counting the number to be Decidedof neutrino at Near detector hall of J-PARC neutrino beam-line by E11 and Lab

neutrino

P40

K.MiwaTohoku U

Measurement of the cross sections of Σp scatterings

Deferred

K1.8

P41

M.Aoki

Osaka U

An Experimental Search for μ - e Conversion in Nuclear Field
Deferred
at a Sensitivity of 10-14 with Pulsed Proton Beam from RCS

MLF

Test Experiment (withdrawn)

will be coordinated by JsPchNeCdule

K1.1BR

will be coordinatK1.1BR
ed by JPN"

Organization and Committees

Organization and Committees     J-PARC Annual Report 201060

Organization Structure(as of April 2010)
Accelerator Section㸇
L: K. Hasegawa
Accelerator Section㸈
L: M. Kinsho
Accelerator Division
L: A. Ando
DL: T. Koseki

Abbreviations
L: Leader
DL: Deputy Leader

Accelerator Section㸉
L: N. Ouchi
Accelerator Section㸊
L: K. Kikuchi
Accelerator Section㸋
L: T. Koseki
Accelerator Section㸌
L: N. Yamamoto
Neutron Source Section
L: M. Futakawa
DL: H. Takada

Materials and Life
Science Division
L: M. Arai
DL: H. Seto
DL: T. Kato

Neutron Science Section
L: T. Kamiyama
DL: K. Aizawa
Nertron Instrument Section
L: K. Soyama
Muon Science Section
L: Y. Miyake

JAEA President

Deputy Director,
J-PARC Center
Y. Ikeda

Particle and Nuclear
Physics Division
L: T. Kobayashi
DL: N. Saito

Steering Committee
International Advisory
Committee
Safety Committee

Transmutation Section
L: H. Oigawa
DL: K. Tsujimoto

Director,
J-PARC Center

Cryogenics Section
L: T. Ogitsu
DL: Y. Makida

S. Nagamiya

KEK Director

Deputy Director,
J-PARC Center

Safety Division

H. Kobayashi

L. T. Miura
DL: H. Nakashima

Users Consultative
Committee

Radiation Safety Section
L: Y. Miyamoto
DL: M. Numajiri
Health and General Safety
Section
L: T. Kihara
Management Supporting
Section
L: T. Kato
Information System
Section
L: A. Manabe
DL: K. Gorai
Public Relations Section
L: K. Suzuki

Administration Division
L: M. Murasawa
DL: S. Shinohara

General Affairs Section
L: S Shinohara
DL: Y. Kujiraoka
Users Affairs Section
L: K. Fujita
DL: Y. Togo
Users Office Team
Utilization
Promotion TeamInternational
Relations TeamJ-PARC Annual Report 2010     Organization and Committees

61

Members of the Committees organized for J-PARC(as of March 2011)

1) Steering Committee
Hideo Hirayama
Yukihide Kamiya
Satoru Kondo
Shoji Nagamiya
Hideki Namba
Sohei Okada
Osamu Shimomura
Fumihiko Takasaki
Hiroshi Uetsuka
Hideaki Yokomizo
Keisuke Yoshio

High Energy Accelerator Research Organization, Japan
High Energy Accelerator Research Organization, Japan
Japan Atomic Energy Agency, Japan
J-PARC Center, Japan
Japan Atomic Energy Agency, Japan
Japan Atomic Energy Agency, Japan
High Energy Accelerator Research Organization, Japan
High Energy Accelerator Research Organization, Japan
Japan Atomic Energy Agency, Japan
Japan Atomic Energy Agency, Japan
High Energy Accelerator Research Organization, Japan

2) International Advisory Committee
Ian Anderson
Sergio Bertolucci
Bernard Frois
Hidetoshi Fukuyama
Stuart Henderson
Young-Kee Kim
Hugh Montgomery
Jean-Michel PoutissouThomas Roser
Tsumoru Shintake
Hoerst Stoecker
Satoru Tanaka
Andrew Taylor
Eiko TorikaiJohn W. WhiteOak Ridge National Laboratory, USA
CERN, Switzerland
CEA-Saclay, FranceTokyo University of Science, JapanOak Ridge National Laboratory, USA
Fermi National Accelerator Laboratory, USA
Thomas Jefferson National Accelerator Facility, USA
TRIUMF, Canada
Brookhaven National Laboratory, USA
RIKEN, Japan
GSI, Germany
The University of Tokyo, Japan
Rutherford Appleton Laboratory and ISIS, UK
University of Yamanashi, Japan
Australian National University, Australia (chair)

3) Users Consultative Committee for J-PARC
Hiroaki Aihara
Masatoshi Arai
Hideto EnyoToshiharu Fukunaga
Yoshiaki Fukushima
Makoto Hayashi
Tomohiko Iwasaki
Shinichi Kamei
Toshiji Kanaya
Yoshiaki Kiyanagi
Takashi Kobayashi
Yasuhiko Miyake
Tomofumi Nagae
Tsuyoshi Nakaya
Kazuma Nakazawa

The University of Tokyo, Japan
Japan Atomic Energy Agancy, JapanRIKEN, Japan
Kyoto University, Japan
Toyota Central R&D labs., Inc., Japan
Ibaraki Prefecture, Japan
Tohoku University, Japan
Mitsubishi Research Institute, Inc., Japan
Kyoto University, Japan
Hokkaido University, Japan
High Energy Accelerator Research Organization, Japan
High Energy Accelerator Research Organization, Japan
Kyoto University, Japan
Kyoto University, Japan
Gifu University, Japan

Organization and Committees     J-PARC Annual Report 2010

62
Nobuhiko Nishida
Kazumi Nishijima
Naohito Saito
Mamoru Sato
Mitsuhiro shibayama
Hirokazu Tamura
Eiko Torikai
Kazuyoshi Yamada
Taku Yamanaka

Tokyo Institute of Technology, Japan
Mochida Pharmaceutical Co.,Ltd., Japan
High Energy Accelerator Research Organization, Japan
Yokohama City University, JapanThe University of Tokyo, Japan
Tohoku University, Japan
University of Yamanashi, Japan
Tohoku University, Japan
Osaka University, Japan (chair)

4) Accelerator Technical Advisory Committee
David Findlay
Ronald Garoby
John Galambos
Stephen holmes
Akira Noda
Peter Ostroumov
Uli Ratzinger
Thomas Roser
Jie Wei

Rutherford Appleton Laboratory, UK
CERN, Switzerland
Oak Ridge National Laboratory, USA
Fermi National Accelerator Laboratory, USA
Kyoto University, Japan
Argonne National Laboratory, USA
Frankfurt University, Germany
Brookhaven National Laboratory, USA (chair)
Michigan State University, USA

5) Neutron International Advisory Committee
Gunter Bauer
Stephen Bennington
Kurt Clausen
John Haines
Toshiji Kanaya
Yoshiaki Kiyanagi
Dan Neumann
Robert Robinson
Kazuyuki Yamada

Forschungszentrum Julich GmbH (retired), Germany
Rutherford Appleton Laboratory, UK
Paul Scherre Institute, Switzerland
Oak Ridge National Laboratory, USA
Kyoto University, Japan
Hokkaido University, Japan
National Institute of Standards and Technology, USA (chair)
Australian Nuclear Science and Technology Organization, Australia
Tohoku University, Japan6) Muon Science Advisory Committee
Jun Akimitsu
Hiroshi Amitsuka
Robert Cywinski
Elvezio Morenzoni
Jean-Michel Poutissou
Atsushi Shinohara
Jeff E. Sonier
Eiko Torikai

Aoyama Gakuin University, Japan
Hokkaido University, Japan
University of Huddersfield, UK
Paul Scherrer Institute, Switzerland (chair)
TRIUMF, Canada
Osaka University, Japan
Simon Fraser University, Canada
University of Yamanashi, Japan

7) Radiation Safety Committee
Yoshihiro Asano
Shuichi Ban
Hideo Hirayama
Kenjiro Kondo
Takeshi Murakami
Tetsuo Noro
Takeo Oku

RIKEN, Japan
High Energy Accelerator Research Organization, Japan
High Energy Accelerator Research Organization, Japan
High Energy Accelerator Research Organization, Japan
National Institute of Radiological Sciences, Japan
Kyushu University, Japan
Japan Atomic Energy Agency, Japan

J-PARC Annual Report 2010     Organization and Committees

63
Kotaro Sato
Seiichi Shibata
Hiroshi Uetsuka
Yoshitomo Uwamino
Yasuhiro Yamaguchi

High Energy Accelerator Research Organization, Japan
Kyoto University, Japan(Chair)Japan Atomic Energy Agency, JapanRIKEN, Japan
Japan Atomic Energy Agency, Japan

8) MLF Advisory Board
Masatoshi Arai
Toshiharu Fukunaga
Makoto Hayashi
Susumu Ikeda
Yujiro Ikeda
Ryosuke Kadono
Kazuhisa Kakurai
Shinichi Kamei
Takashi Kamiyama
Toshiji Kanaya
Yoji Koike
Teiichiro Matsuzaki
Yasuhiro Miyake
Junichiro Mizuki
Nobuhiko Nishida
Yukio Noda
Mamoru Sato
Hideki Seto
Mitsuhiro Shibayama
Hirohiko Shimizu
Jun Sugiyama
Junichi Suzuki
Wataru Utsumi
Kazuyoshi Yamada

Japan Atomic Energy Agency, Japan
Kyoto University, Japan
Ibaraki Prefecture, Japan
High Energy Accelerator Research Organization, Japan
Japan Atomic Energy Agency, Japan
High Energy Accelerator Research Organization, Japan
Japan Atomic Energy Agency, Japan
Mitsubishi Research Institute, Inc., Japan
High Energy Accelerator Research Organization, Japan
Kyoto University, Japan
Tohoku University, JapanRIKEN, Japan
High Energy Accelerator Research Organization, Japan
Japan Atomic Energy Agency, JapanTokyo Institute of Technology, Japan
Tohoku University, Japan
Yokohama City University, Japan
High Energy Accelerator Research Organization, JapanThe Univrsity of Tokyo, Japan
High Energy Accelerator Research Organization, Japan
Toyota Central R&D labs., Inc., Japan
Japan Atomic Energy Agency, Japan
Japan Atomic Energy Agency, Japan
Tohoku University, Japan (chair)

9) Nuclear and Particle Physics Experiments at the J-PARC 50 GeV Proton Synchrotron Program
Advisory Committee
Ikaros I. Bigi
Avraham Gal
Tadafumi Kishimoto
Konrad Kleinknecht
Shunzo Kumano
Toshinori Mori
Tomofumi Nagae
Yasuki Nagai
Satoshi Nakamura
Matthias Grosse Perdekamp
Micheal Shaevitz
Susumu Shimoura
Katsuo Tokushuku
Robert S. Tschirhart
Hitoshi Yamamoto

University of Notre Dame, USA
The Hebrew University of Jerusalem, Israel
Osaka University, Japan
Mainz University, Germany
High Energy Accelerator Research Organization, JapanThe University of Tokyo, Japan
Kyoto University, Tokyo
Osaka University, Tokyo Institute of Technology, Japan
Tohoku University, Japan
University of Illinois, USA
Columbia Univesity, USA
The University of Tokyo, Japan
High Energy Accelerator Research Organization, Japan (chair)Fermi National Accelerator Laboratory, USA
Tohoku University, Japan

Organization and Committees     J-PARC Annual Report 201064

BudgetBudget Profile(Construction)
200
180

JAEA
Construction
After Construction

140

Government Direct120

Government Supplemental

100
80

KEK
Construction

60

After Construction

40
20
0 JAEA
JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK
2000
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
Construction
StartedCompletionof Phase-1

Fiscal Year

Initial Construction (JAEA) = 858 Oku Yen (56%)
Initial Construction (KEK) = 666 Oku Yen (44%)

After Construction (JAEA) = 200 Oku Yen incl. > 2010
After Construction (KEK = 18 Oku Yen incl. > 2010

Budged Profile(Operation)
200

JAEA

180

Operational
Government Direct

160
Oku Yen (Oku = 108)

Oku Yen (Oku = 108)

160

140

6 cycles120

5 cycles100

Operational

JAEA Goal
KEK Goal

8 cycles80

KEK

Full Power(9 cycles; 200 days)

6 cycles

60
40
20
0

JAEA
2005

JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK JAEA KEK
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
Completion Fiscal Yearof Phase-1

Notes;
Operational budget does not include salaries for JAEA and KEK. It includes, however,out-sourcing personnel’s.
A new budget frame was adopted on the basis of the Law for the Promotion of Public Utilization of
the Specific Advanced Large Facilities which was established on July 1, 2009.

Main Parameters

Main Parameters     J-PARC Annual Report 2010

66
Present main parameters of Accelerator
Linac
Acclerated . Particles
EnergyPeak Current
Pulse Width
Repetition Rate
Freq. of RFQ, DTL, and SDTL

Negative hydrogen
181 MeV15mA
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
Muon production target
Target material
Number of muon beam extraction ports

Mercury
3
Supercritical hydrogen
20K/ 1.5 MPa
23Graphite4

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

9
3/6

Muon instruments*
Open for user program (general use)2(* as of March, 2011)

Events

Events     J-PARC Annual Report 201068

Events◦ Minister Kawabata visited J-PARC on April 7.
Tatsuo Kawabata, Minister of Education,
Culture, Sports, Science and Technology visited
J-PARC on April 7, 2010. After an outline of the
J-PARC activities was given, he listened to the explanation about the 50 GeV synchrotron, Materials and Life Science Experimental Facility (MLF),
and Neutrino Monitoring Facility with keen interest, in the respective facilities.

Minister Kawabata (middle).

◦ Established CKor J-PARC (2010, May)
Since there are more than 200 possible users in South Korea, Center for Korean J-PARC Users (CKor J-PARC) was established as
an official contact in 2010 May for the purpose of support of the research of Korean users.
On October 1, J-PARC center concluded “MEMORANDUM OF COLLABORATION (MOC) BETWEEN CENTER FOR KOREAN
J-PARC USERS AND THE HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, JAPAN ATOMIC ENERGY AGENCY FOR INITIATING COOPERATIVE ACTIVITY IN THE FIELDS OF J-PARC RELATED RESEARCHES.” with CKor J-PARC.
In addition, CKor J-PARC established the CKor J-PARC Japan Office in Ibaraki Quantum Beam Research Center, (Tokai, Ibaraki).

Left : Signing ceremony : Prof. Je-Geun Park, Director of CKor J-PARC (left) and Shoji Nagamiya, Director of J-PARC Center (right).
Right : Board members of CKor J-PARC (in front of the CKor J-PARC Japan Office)◦ Toshihide Masukawa, Nobel laureate in physics (2008) visited J-PARC on July 16, 2010.
On July 16, 2010, Dr. Toshihide Masukawa (Director of KMI (Nagoya University: Kobayashi-Masukawa Institute for the Origin ofParticles and the Universe (KMI)) visited J-PARC. He expressed his expectation for the research progress made by J-PARC, in a social
gathering with the parties concerned, followed by meetings with each of the staffs of the Hadron Facility, Material and Life Sci-

J-PARC Annual Report 2010     Events

69
ence Experimental Facility, and Neutrino
Monitor Facility.

Dr. Toshihide Masukawa

3rd from left, front: Dr. Masukawa
Rightmost, front: Hideaki Yokomizo, JAEA
Leftmost, front: Tatsuya Murakami, Mayor of Tokai village
2nd from left, back: Shoji Nagamiya, J-PARC◦ Skull practice session with foreign users (Aug. 17)
Researchers and users from overseas working at J-PARC and Tatsuya Murakami, the Mayor of Tokai village had a skull practicesession, discussing some issues in their everyday life, such as transportation from Narita Airport, the traffic signs in the village, accommodation, education for children, hospitals and the like. The succeeding confabulation was very successful.

Picture of the social gathering.

Picture of the skull session.

◦ Open house held at J-PARC (Aug. 28)
On Aug. 28 2010, J-PARC was opened to the public for the third time since its establishment. Three accelerators (Linac, 3 GeV
synchrotron, 50 GeV synchrotron) and each of the experimental facilities (Materials and Life Science Experimental Facility, Hadron
Experimental Facility, and Neutrino Experimental Facility) went on public exhibition. In spite of the extreme heat on that day, 3,169
people came to J-PARC. Children were amazed to see the huge size of the most advanced scientific experimental facilities. There
were some who took part in the experimental corner in each facility.

50 GeV synchrotron.

Hadron Experimental Hall.

Events     J-PARC Annual Report 201070

◦ Linac 10/25th Linac international conference (Sept. 12-17)
From Sept. 12 to 17, 2010, LINAC 10/25th Linac international conference was held in Tsukuba International Congress center(EPOCHAL TSUKUBA). It is the most prestigious international congress in the world in the field of Linac, which is held once every
two years. KEK and JAEA jointly hosted the congress. A total of 400 researchers and highly skilled technicians participated (270 ofthem came from overseas), 47 oral presentations and more than 300 poster presentations were provided. Techniques on Linac,science and researches concerned, and up-to-date conditions were introduced, which led to lively exchange of views and discussion.
On the last day of the conference, many of them enjoyed the J-PARC site tour.

Group photo in EPOCHAL TSUKUBA.

Site tour in J-PARC.

J-PARC Annual Report 2010     Events

71◦ Coverage by foreign media (Sept. 21)
A BBC reporter visited J-PARC on Sept. 21, 2010 to interview a researcher from the United Kingdom, who took part in the
Neutrino international collaborative experiment (T2K experiment). In addition, Korean Educational Broadcasting System (EBS) had
an interview with J-PARC on Oct. 12 to 15, as CKor J-PARC officially started to use the J-PARC facilities.

Reporters from BBC.

Reporters from EBS, Korea.

◦ The 2nd MLF Symposium (Jan. 17-18)
The 2nd MLF Symposium was held at Kobayashi Hall in High Energy Accelerator Research Organization (KEK) on January 1718, 2011.
32 lectures and 70 posters were presented in the symposium, which covered the results of the studies using the world’s
highest intense neutrons or muons produced in the Materials and Life Science Experimental Facility (MLF), the statuses of theexperimental instruments and facility operations, and related research and development.
In addition, on the first day of the symposium, the corporations, which are located in Ibaraki prefecture and participate in the
IBARAKI Neutron Users and Instrument Fabricators Society, exhibited their products which were used in J-PARC.

Lecture.

Group photo (in front of Kobayashi Hall, KEK).

Events     J-PARC Annual Report 201072

◦ Participants in HOPE meeting visited J-PARC (Mar. 9)
The HOPE meeting has been designed as an opportunity for selected graduate students and young researchers from Asian
countries (over 100 of them) in physics and its related fields, to mingle with Nobel Prize winners while presenting or discussing
their studies. It has also served as training to make them research leaders in future.
The participants visited J-PARC, and asked many questions throughout the briefing and the tour.

Visitors in MLF.

Visitors in Hadron Facility.

◦ Foreign visitors (2010)

Prof. Sebastian Schmidt, Jülich Research Bo Sundman, visiting researcher: Commis- ESS delegate, Lund, Sweden (Nov. 9, 2010).
Centres and his colleague (Apr. 13, 2010).
sariat à l’énergie atomique (May 18, 2010).

Visitors from University of Birmingham (Nov. 17,2010).

Visitors from DESY (Deutsches Elektronen-Synchrotron) (Dec. 10, 2010).

J-PARC Annual Report 2010     Events

73◦ Visitors to J-PARC in Japanese fiscal year (JFY) 2010
In JFY 2010, 6,806 people visited J-PARC.
General public, local residents, and people related to education account for approximately half of the whole visitors.

Public Offices
5％

Junior-high/High school
students, teachers
Business

1％

6％

9％
20％

Local residents

under the table, no one was injured.

15％

Media
University students, experts
VIP, lawmakers

10％

1％

Foreigners

33％

ln-house

Breakdown of J-PARC visitors in JFY 2010.

◦ The Great East Japan Earthquake (Mar. 11, 2011)
On March 11, when the Great East Japan Earthquake hit, 40 visitors from Chiba were in the site. When the earthquake ocBreakdown
of wasJ-PARC
visitors
2010
curred,a briefing
being carried
outin
in FY
our conference
room, where the whole ceiling board fell down. During the incident thelecturer instructed the visitors to huddle under the table, so no one was injured.

Fallen ceiling board due to the earthquake on
March 11, 2011.

Fallen ceiling board due to the earthquake on March 11

Events     J-PARC Annual Report 2010

J-PARC Annual Report 2009     Events

74

Dates for Committees
1) Steering Committee
April 20th, 2010 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
July 29th, 2010 at Tokai Campus, KEK
December 21st, 2010 at Tokai Campus, KEK
2) International Advisory Committee
February 21st and 22nd, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
3) Users Consultative Committee for J-PARC
April 2nd, 2010 at Center for Computational Science & e-Systems, (Ueno), JAEA
October 6th, 2010 at Tokyo Office, JAEA
February 16th, 2011 at Tokyo Office, JAEA
4) Accelerator Technical Advisory Committee
February 17th - 19th, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
5) Neutron International Advisory Committee
February 28th - March 2nd, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki6) Muon Science Advisory Committee
February 18th and 19th, 2011 at Ibaraki Quantum Beam Research Center, Tokai, Ibaraki
7) Radiation Safety Committee
9th Committee : May 27th, 2010  at  Nuclear Science Research Institute, JAEA, Tokai, Ibaraki
10th committee : December 7th, 2010 at Nuclear Science Research Institute, JAEA, Tokai, Ibaraki
8) MLF Advisory Borad
9th Board : August 12th, 2010 at Tokyo Office, JAEA
10th Board : March 11th, 2011 at Tokyo Office, JAEA
9) Nuclear and Particle Physics Experiments at the J-PARC 50 GeV Proton Synchrotron Program Advisory Committee
10th Committee : July 16th - 18th, 2010 at Tokai & Tsukuba campus, KEK
11th Committee : January 14th - 16th, 2011 at Tsukuba campus, KEKPublications

Publications     J-PARC Annual Report 201076

Publications in Periodical Journals
A-001
Kameda, Y. et al.
Hydration Structure around the Nitrogen
Atom of the Pyridine Molecule
Activity Report on Neutron Scattering
Research, vol.16, 682 (2009)
A-002
Ikeshoji, T. et al.
Diffuse and Doubly Split Atom Occupationin Hexagonal LiBH4
Appl. Phys. Lett., vol.95, 221901 (2009)
A-003
Kato, S. et al.
Surface Changes on AlH3 During theHydrogen Desorption
Appl. Phys. Lett., vol.96, 51912 (2010)
A-004
Nakamura, M. et al.
A New Possibility of Dynamical Study on
Solid State Ionic Materials by Inelastic
Neutron Scattering
Atom Indonesia, vol.36, 116 (2010)
A-005
Katabuchi, T. et al.
Measurements of neutron capture crosssections using a NaI(Tl) spectrometer at
the J-PARC MLF neutron nucleus reaction
instrument
B. Am. Phys. Soc., vol.54 (2009)
A-006
Kino, K. et al.
Neutron beam provided by the neutron
nucleus reactioninstrument at the J-PARC MLF
B. Am. Phys. Soc., vol.54, LC6 (2009)
A-007
Harada, H. et al.
Measurements of neutron capture crosssections using a 4πGe spectrometer at the
J-PARC/MLF/NNRI
B. Am. Phys. Soc., vol.54, LC7 (2009)
A-008
Kameda, Y. et al.
Local Structure Around the Amino Groupof Glycine Carbamate in Concentrated
Aqueous Solutions
Bull. Chem. Soc. Jpn., vol.82, 1485 (2009)
A-009
Kameda, Y. et al.
Partial Pair Correlation Functions of Highly
Concentrated Aqueous Urea Solutions
Determined by Neutron Diffraction with
14N/15N and H/D Isotopic Substitution Methods
Bull. Chem. Soc. Jpn., vol.83, 131 (2010)

A-010
Horinouchi, A. et al.
Surface Reorganization of Thin Poly(methyl
methacrylate) Films Induced by Water
Chem. Lett., vol.39, 810 (2010)

A-020
Kajimoto, R. et al.
4D Space Access Neutron Spectrometer
4SEASONS (Siki)
Hamon, vol.20, 8 (2010)

A-011
Mibe, T.
New g-2 experiment at J-PARC
Chinese Phys. C, vol.34, 745 (2010)

A-021
Shibata, K. et al.
The near backscattering Si crystal analyzer
spectrometer "DNA"Hamon, vol.20, 13 (2010)

A-012
Ishida, K. et al.
Numerical Simulation on the Dynamics of
Photo-induced Cooperative Phenomena in
Molecular Crystals
Comput. Phys. Commun., vol.180, 1489 (2009)
A-013
Hasegawa, K.
J-PARC linac
Denki Gakkai-Shi, vol.130, 739 (2010)
A-014
Yamaguchi, T.
Structure and Dynamics of Water on a Wide
Length and Time Scale
Fukuoka University Science Reports, vol.38, 95(2009)
A-015
Yoshida, K. et al.
Dynamics of Confined Water in a
Supercooled State with Neutron Spin Echo
Spectroscopy
Fukuoka University Science Reportss, vol.39 55(2009)
A-016
Oku, T.
Development of a neutron-polarizing device
based on a quadrupole magnet and its
application to a focusing SANS instrument
Hamon, vol.19, 140 (2009)
A-017
Itoh, S. et al.
Development of Fermi chopper in KEK
Hamon, vol.19, 224 (2009)
A-018
Yokoo, T.
6th International Workshop on Sample
Environment at Neutron Scattering Facilities
Hamon, vol.20, (2010)
A-019
Arai, M.
J-PARC turned over and roads to it
Hamon, vol.20, 4 (2010)

Supplementary data to the 2009 report are also included.

A-022
Hattori, T. et al.
Design concept and the current construction
state of J-PARC high-pressure neutron
diffractometer PLANET
Hamon, vol.20, 39 (2010)
A-023
Yokoo, T. et al.
High Resolution Chopper spectrometer HRC
Hamon, vol.20, 45 (2010)
A-024
Suzuki, J. et al.
Development of the time-of flight smallerangle neutron scattering instrument Taikan
Hamon, vol.20, 54 (2010)
A-025
Yamada, N. et al.
Horizontal type neutron reflectmeter ARISA-2
Hamon, vol.20, 58 (2010)
A-026
Itoh, S. et al.
Development of T0 chopper (2)Hamon, vol.20, 146 (2010)
A-027
Sakasai, K.
Scintillation detector and imaging plate
Hamon, vol.20, 171 (2010)
A-028
Ishikawa, H.
Information Security Countermeasures on
J-PARC network infrastructure
Heisei-22-Nendo Kumamoto Daigaku Sogo
Gijutsu Kenkyukai Hokokushu (CD-ROM), 4 (2011)
A-029
Yamazaki, T. et al.
Neutron reflectometry of buried monatomic
hydrogen layer at the hetero-interface in ahighly mismatched Sr and H-terminated Si(111)
Hyomen Kagaku, vol.31, 380 (2010)
A-030
Kimura, A. et al.

J-PARC Annual Report 2010     Publications

77
A Dead-Time Correction Method for Multiple
Gamma-ray Detection
IEEE Nucl. Sci. Conf. R. (NSS/MIC), 138 (2009)
A-031
Sakasai, K. et al.
Storage Characteristics of KBr:Eu2+ Phosphors
With Radiators by Irradiation of Fast Neutrons
IEEE Nucl. Sci. Conf. R. (NSS/MIC), 966 (2010)
A-032
Kin, T. et al.
Development of a 4π Germanium
Spectrometer for Nuclear Data
Measurements at J-PARC
IEEE Nucl. Sci. Conf. R. (NSS/MIC), 1194 (2009)

A-041
Adachi, T. et al.
Study of Superconducting Curved Solenoids
for a High Intensity Muon Beam LineIEEE T. Appl. Supercon., vol.20, 1948 (2010)
A-042
Igarashi, Y. et al.
An Integrated Data Acquisition System for
J-PARC Hadron Experiments
IEEE T. Nucl. Sci., vol.57, 618 (2010)
A-043
Sako, H. et al.
Unified beam control system of J-PARC linac
IEEE T. Nucl. Sci., vol.57, 1528 (2010)

A-033
Ichikawa, G. et al.
A CCD-based Pixel Detector with Micron
Spatial Resolution for Ultra Cold Neutrons
IEEE Nucl. Sci. Conf. R. (NSS/MIC), 1619 (2009)

A-044
Sako, H. et al.
Suppression of Beam Loss at the First Arc
Section in the J-PARC Linac
IEEE T. Nucl. Sci., vol.57, 2783 (2010)

A-034
Nakamoto, T. et al.
Construction of Superconducting Magnet
System for the J-PARC Neutrino Beam LineIEEE T. Appl. Supercon., vol.20, 208 (2010)

A-045
Sakaguchi, A. et al.
PRODUCTION OF NEUTRON-RICH LAMBDAHYPERNUCLEI AT J-PARC
Int. J. Mod. Phys. E, vol.19, 2632 (2010)

A-035
Tani, N. et al.
Field Measurement and Machinery
Placement of the J-PARC RCS Magnets
IEEE T. Appl. Supercon., vol.20, 238 (2010)

A-046
Sato, Y. et al.
PRESENT STATUS OF J-PARC HADRONEXPERIMENTAL FACILITY
Int. J. Mod. Phys. E, vol.19, 2663 (2010)

A-036
Sasaki, K. et al.
Commissioning Results of Superconducting
Magnet System for the Neutrino Beam LineIEEE T. Appl. Supercon., vol.20, 242 (2010)

A-047
Sakasai, K.
Scintillation-type Neutron Detector used in
MLF
Ionizing Radiaion/Hoshasen, vol.36, 131 (2010)

A-037
Muto, R. et al.
Manufacturing and Operation of theMagnetic Septa for the Slow Beam
Extraction From the J-PARC 50 GeV Proton
SynchrotronIEEE T. Appl. Supercon., vol.20, 336 (2010)

A-048
Asoo, K. et al.
Tensile Behavior of a TRIP-aided Ultra-fine
Grained Steel Studied by Neutron Diffraction
ISIJ Int., vol.51, 145 (2011)

A-038
Tanaka, K. et al.
Radiation-Resistant Magnets for Hadron
Experimental Hall of J-PARC
IEEE T. Appl. Supercon., vol.20, 340 (2010)
A-039
Takahashi, H. et al.
Indirectly Cooled Radiation-Resistant
Magnets for Hadron Target Station at J-PARC
IEEE T. Appl. Supercon., vol.20, 344 (2010)
A-040
Iwashita, Y. et al.
Practical Applications of Permanent Magnet
Multipoles
IEEE T. Appl. Supercon., vol.20, 842 (2010)

A-049
Kawakita, Y. et al.
Ionic Dynamics of Molten Cuprous Iodide
J. Alloy. Compd., vol.452, 136 (2009)
A-050
Ikeda, K. et al.
Reversible Hydriding/Dehydriding
Properties of New Y3Al2 Hydrides
J. Alloy. Compd., vol.471 L13 (2009)
A-051
Itoh, K. et al.
Structural Study of Amorphous LaNi5Dx:
In Situ Neutron and X-ray Diffraction
Experiments in Deuterium gas
J. Alloy. Compd., vol.474, 4 (2009)
A-052
Sato, T. et al.

Synchrotron Radiation Powder X-ray and
Neutron Diffraction Studies on Novel Y3Al2
HydridesJ. Alloy. Compd., vol.481 254 (2009)
A-053
Itoh, K. et al.
Structural Study on Zr0.39 Ni0.61 and (Zr0.39
Ni0.61)D0.59 Amorphous Alloys by Neutron and
X-ray Diffraction
J. Alloy. Compd., vol.483 213 (2009)
A-054
Sato, T. et al.
Syntheses, Crystal Structures, and Thermal
Analyses of Solvent free Ca(AlD4)2 and
CaAlD5
J. Alloy. Compd., vol.487 472 (2009)
A-055
Muto, S. et al.
Dehydriding Process of a-AlH3 Observedby Transmission Electron Microscopy andElectron Energy-loss Spectroscopy
J. Appl. Phys., vol.105 123514 (2009)
A-056
Matsuo, H. et al.
Structural and piezoelectric properties ofhigh-density (Bi0.5K0.5)TiO3-BiFeO3 ceramics
J. Appl. Phys., vol.108, 104103 (2010)
A-057
Kubo, J. et al.
Improvement of Poly(vinyl alcohol) Properties
by the Addition of Magnesium Nitrate
J. Appl. Polym. Sci., vol.112, 1647 (2009)
A-058
Menjo, M. et al.
Synthesis and Partial Dehydrogenation of
the Impregnated Lithium Borohydride, LiBH4
J. Ceramic Soc. Jpn., vol.117, 457 (2009)
A-059
Nakada, M. et al.
Quasielastic Neutron Scattering
Investigation of Motion of Water Moleculesin N-propyl alcohol-water Mixture
J. Chem. Phys., vol.130, 074503 (2009)
A-060
Ogawa, H. et al.
Time-resolved Specular and Off-specular
Neutron Reflectivity Measurements
on Deuterated Polystyrene and Poly
(vinylmethylether) Blend Thin Films During
Dewetting Process
J. Chem. Phys., vol.131 104907 (2009)
A-061
Iwase, H. et al.
Newly Designed Neutron Diffraction Cell
for Fluids at High Temperatures and High
Pressures
J. J. Appl. Phys., vol.49, 16602 (2009)

Publications     J-PARC Annual Report 2010

78
A-062
Ikeda, K. et al.
Hydrogen Storage Technologies and RelatedMaterials
J. Jpn. Soc. Mech. Eng., vol.112, 289 (2009)
A-063
Ouchi, N.
Status report of J-PARC
J. Korean Phys. Soc., vol.56, 1921 (2010)
A-064
Sato, T. et al.
Structural Investigation on Supercritical
Carbon Dioxide and its Mixture with Alcohol
J. Mol. Liq., vol.147, 102 (2009)
A-065
Sato, T.J. et al.
High-intensity and Versatile Chopper
Spectrometer Project for J-PARC
J. Neutron Res., vol.16, 113 (2009)
A-066
Naoe, T. et al.
Effect of tensile stress on cavitation damage
formation in mercury
J. Nucl. Mater., vol.398, 199 (2010)
A-067
Sugawara, T. et al.
Investigation of beam window bucklingwith consideration of irradiation effects forconceptual ADS design
J. Nucl. Mater., vol.398, 246 (2010)

Studied by Using X-ray Diffraction andReverse Monte Carlo Modeling.
J. Phys. Conf. Ser., vol.144, 012107 (2009)
A-073
Kobayashi, M. et al.
Characterization of Swollen Structure ofHigh-density Polyelectrolyte Brushes in Salt
Solution by Neutron Reflectivity
J. Phys. Conf. Ser., vol.184, 012010 (2009)
A-074
Terayama, Y. et al.
Influence of Salt Concentration on SwellingStates of Poly (sulfobetaine) Brush at
Aqueous Solution Interface
J. Phys. Conf. Ser., vol.184, 012011 (2009)
A-075
Shimura, N. et al.
High Pressure Raman and Visible Absorption
Study of AlH3
J. Phys. Conf. Ser., vol.215, 012047 (2010)
A-076
Tatsumoto, H. et al.
Development of a thermal-hydraulics
experimental system for high Tc
superconductors cooled by liquid hydrogen
J. Phys. Conf. Ser., vol.234, 032056 (2010)
A-077
Sakaguchi, Y. et al.
Structure of glasses for 3He neutron spin
filter cells
J. Phys. Conf. Ser., vol.294, 012004 (2011)

A-068
Sugawara, T. et al.
Analytical validation of uncertainty inreactor physics parameters for nuclear
transmutation systems
J. Nucl. Sci. Technol., vol.47, 521 (2010)

A-078
Kira, H. et al.
Developments of In-Situ SEOP Polarized 3He
Neutron Spin Filter in Japan
J. Phys. Conf. Ser., vol.294, 012014 (2011)

A-069
Haga, K. et al.
Distribution of microbubble sizes andbehavior of large bubbles in mercury flow ina mockup target model of J-PARC
J. Nucl. Sci. Technol., vol.47, 849 (2010)

A-079
Sakaguchi, Y. et al.
Applications of 3He neutron spin filterson the small-angle neutron scattering
spectrometer SANS-J-II
J. Phys. Conf. Ser., vol.294, 012017 (2011)

A-070
Sugawara, T. et al.
Conceptual design study of beam window
for accelerator-driven system
J. Nucl. Sci. Technol., vol.47, 953 (2010)

A-080
Itoh, S. et al.
Single-Length-Scaling Analysis for
Antiferromagnetic Fractons in Dilute
Heisenberg System RbMn0.4Mg0.6F3
J. Phys. Soc. Jpn., vol.78, 013707 (2009)

A-071
Sumino, Y. et al.
Spontaneous Deformation of an Oil Droplet
Induced by the Cooperative Transport of
Cationic and Anionic Surfactants Throughthe Interface
J. Phys. Chem. B, vol.113, 15709 (2009)
A-072
Itoh, K. et al.
Structure of Mg50Ni50 Amorphous Alloy

A-081
Kanaya, T. et al.
Glassy Dynamics and Heterogeneity ofPolymer Thin Films
J. Phys. Soc. Jpn., vol.78, 041004 (2009)
A-082
Sugiyama, M. et al.
Assembly State of Proteasome Activator 28
in an Aqueous Solution as Studied by Small-Angle Neutron Scattering
J. Phys. Soc. Jpn., vol.78 124802 (2009)
A-083
Onodera, Y. et al.
Crystal Structure of Li7P3S11 Studied by
Neutron and Synchrotron X-ray Powder
Diffraction
J. Phys. Soc. Jpn., vol.79, 87 (2010)
A-084
Iwano, K. et al.
Propagating Librations in Ice XI: Model
Analysis and Coherent Inelastic Neutron
Scattering Experiment
J. Phys. Soc. Jpn., vol.79, 063601 (2010)
A-085
Wakimoto, S. et al.
Degradation of superconductivity and spin
fluctuations by electron overdoping in
LaFeAsO1-xFx
J. Phys. Soc. Jpn., vol.79, 074715 (2010)
A-086
Kajimoto, R. et al.
Temperature and Ag doping effecton magnetic excitations in the quasitwo-dimensional triangular lattice
antiferromagnet CuCrO2 studied by inelastic
neutron scattering
J. Phys. Soc. Jpn., vol.79, 123705 (2010)
A-087
Seki, Y. et al.
Multilayer Neutron Interferometer with
Complete Path Separation
J. Phys. Soc. Jpn., vol.79, 124201 (2010)
A-088
Mori, K. et al.
Ionic Conductivity and Structural Propertiesof Lithium Lanthanum Titanate Quenched
into Liquid Nitrogen Studied by Neutron
Powder Diffraction,
J. Phys. Soc. Jpn., vol.79, Suppl. A, 84 (2010)
A-089
Onodera, Y. et al.
Crystal Structure of Li7P3S11 Studied by
Neutron and Synchrotron X-ray Powder
Diffraction
J. Phys. Soc. Jpn., vol.79, Suppl. A, 87 (2010)
A-090
Nakamura, M. et al.
Novel Dynamics of Superionic Conducting
Glasses Proved by Inelastic Neutron
Scattering
J. Phys. Soc. Jpn., vol.79, Suppl. A, 122 (2010)
A-091
Sato, M. et al.
Magnetic Excitation Spectra ofSuperconducting Ca-Fe-Pt-As System
J. Phys. Soc. Jpn., vol.80, 093709 (2011)

J-PARC Annual Report 2010     Publications

79
A-092
Okuda, T. et al.
Effect of Spin Dilution on the Magnetic
State of Delafossite CuCrO2 with an S = 3/2
Antiferromagnetic Triangular SublatticeJ. Phys. Soc. Jpn., vol.80, 014711 (2011)
A-093
Ishida, K. et al.
Theoretical Study on the Coherent Nonlinear
Dynamics of Photo induced Structural
ChangeJ. Phys.: Conf. Ser., vol.148 012057 (2009)
A-094
Ohnishi, H. et al.
Density Functional Study of a Photoinduced Phase in Graphite
J. Phys.: Conf. Ser., vol.148 012059 (2009)
A-095
Kawashima, K. et al.
Distribution of Glass Transition Temperature
Tg in a Polymer Thin Film by Neutron
Refrectivity
J. Phys.: Conf. Ser., vol.184 012004 (2009)
A-096
Hattori, Y. et al.
For Hgh-pressure Experiments Using total
Scattering Spectrometer NOVA at J-PARC
J. Phys.: Conf. Ser., vol.215 (2010)
A-097
Yamazaki, D. et al.
Neutron beam focusing using large-m
supermirrors coated on precisely-figured
aspheric surfaces
J. Phys.: Conf. Ser., vol.251 251076 (2010)
A-098
Ohara, K. et al.
Structural disorder in lithium lanthanum
titanate: the basis of superionic conduction
J. Phys.:Condens. Matter., vol.22 404203 (2010)
A-099
Sako, H. et al.
Current status and performance of the
J-PARC accelerators
J. Power Energy Syst, (Internet), vol.4, 218 (2009)
A-100
Ogiwara, N. et al.
Estimation of eddy current loss for a turbomolecular pump in the J-PARC rapid cycling
synchrotron
J. Vac. Soc. of Jpn., vol.53, 148 (2010)
A-101
Endoh, Y. et al.
Introduction to Neutron Scattering for
Materials Science
J. Vac. Soc. of Jpn., vol.53, 703 (2010)
A-102
Ogiwara, N.

Simulation of radial flow generated byrotating a set of screens and disks
J. Vac. Soc. of Jpn., vol.53, 773 (2010)
A-103
Ogiwara, N. et al.
Improvement of sensitivity near atmosphericpressure in a Pirani gauge in constantcurrent mode
J. Vac. Soc. of Jpn., vol.54, 162 (2011)
A-104
Ogiwara, N.
Simulation of radial flow generated byrotating a set of screens and disks, 2
J. Vac. Soc. of Jpn., vol.54, 188 (2011)
A-105
Inoue, K. et al.
Neutron Reflectometry for Observation of
Machined Surface Roughness
Jpn. J. Appl. Phys., vol.48 126504 (2009)
A-106
Iwase, H. et al.
Newly Designed Neutron Diffraction Cell
for Fluids at High Temperatures and High
Pressures
Jpn. J. Appl. Phys., vol.49, 16602 (2010)
A-107
Meigo, S.
Beam commissioning of the J-PARC MLF
Kasokuki, vol.5, 327 (2009)
A-108
Ao, H. et al.
LINAC08 report
Kasokuki, vol.5, 342 (2009)
A-109
Utsumi, W.
Strategy of High Pressure Research with
Neutron at J-PARC
Koatsuryoku No Kagaku To Gijutsu, vol.19, 10(2009)
A-110
Machida, A. et al.
High Pressure Neutron Scattering
Experiments on Hydrogen Storage Materials
Koatsuryoku No Kagaku To Gijutsu, vol.19, 24(2009)
A-111
Okuchi, T. et al.
Powder Neutron Diffraction Using NanoPolycrystalline Diamond as Opposed Anvils
Koatsuryoku No Kagaku To Gijutsu, vol.20, 175(2010)
A-112
Kobayashi, K.
Understanding pit dwellings from Middle
Jomon using 14C dates
Kokuritsu rekishi minzoku hakubutsukan
kenkyū hōkoku, vol.149 113 (2009)

A-113
Harunari, H. et al. (eds)
Studies of the Kamikuroiwa Site in Ehime
Prefecture, Japan
Kokuritsu rekishi minzoku hakubutsukan
kenkyū hōkoku, vol.154 (2009)
A-114
Futakawa, M. et al.
Cavitation in high-power pulsed spallation
neutron sources
Konsoryu, vol.24, 138 (2010)
A-115
Ohnishi, H. et al.
Theory for diaphite and early stage ofgraphite-diamond phase transition inducedby visible lights
Kotai Butsuri, vol.44, 257 (2009)
A-116
Otomo, T.
Static and dynamic structure studies of glassand liquid materials
Kotai Butsuri, vol.44, 809 (2009)
A-117
Kajimoto, R. et al.
New technique for inelastic neutron
scattering measurement demonstrated on
the chopper spectrometer 4SEASONS at
J-PARC
Kotai Butsuri, vol.45, 79 (2010)
A-118
Kobayashi, M. et al.
Structure and Surface Properties of Highdensity Polyelectrolyte Brushes at theInterface of Aqueous Solution
Macromo. Sym, vol.279, 79 (2009)
A-119
Mojammel, M.H. et al.
Study of Thickness Dependent Density in
Ultrathin Water Soluble Polymer Films
Macromolecules, vol.42, 732 (2009)
A-120
Ojima, M. et al.
Work Hardening Mechanism in High
Nitrogen Austenitic Steel Studied by in Situ
Neutron Diffraction and in Situ Electron
Backscattering Diffraction
Mater. Sci. Eng. A, vol.527, 16 (2009)
A-121
Kikuchi, M. et al.
A challenge for a high-resolution Ag-InCd decoupler in intensified short-pulsed
neutron source
Mater. Sci. Forum, vol.652, 92 (2010)
A-122
Harjo, S. et al.
Aspire To Become TAKUMI – TAKUMI present
status and research topics –Mater. Sci. Forum, vol.652, 99 (2010)

Publications     J-PARC Annual Report 2010

80
A-123
Ito, T. et al.
Application Software Development for
the Engineering Materials Diffractometer,
TAKUMI.
Mater. Sci. Forum, vol.652, 238 (2010)
A-124
Sato, T. et al.
Direct Dry Syntheses and Thermal Analysesof a Series of Aluminum Complex Hydrides
Mater. Trans., vol.50, 182 (2009)
A-125
Otomo, T. et al.
High Intensity Total Diffractometer NOVA
Materia Japan, vol.48, 349 (2009)
A-126
Kamiyama, T. et al.
Super High Resolution Powder Diffractometer
Materia Japan, vol.48, 353 (2009)
A-127
Harjo, S. et al.
Engineering materials diffractometer"Takumi"Materia Japan, vol.48, 355 (2009)
A-128
Torikai, N. et al.
Neutron Reflectometer with a Horizontal
Sample-Geometry, ARISA-II
Materia Japan, vol.48, 360 (2009)
A-129
Itoh, S. et al.
High Resolution Chopper Spectrometer HRC
Materia Japan, vol.48, 363 (2009)
A-130
Mori, K. et al.
Structural and Electrochemical Properties of
La0.8Sr0.2Ga1xFexO3
Method Phys. Res. A, vol.600, 328 (2009)
A-131
Ikeda, K. et al.
Dehydriding Reaction of AlH3: in-situ
Microscopic Observations Combined with
Thermal and Surface Analyses
Nanotechnology, vol.20, 204004 (2009)
A-132
Kamaya, N. et al.
A lithium superionic conductor
Nat. Mater., vol.10, 682 (2011)
A-133
Kajimoto, R. et al.
New Technique for Inelastic Scattering
Measurement is in Practical Use at J-PARC
Neutron News, vol.21, 55 (2010)
A-134
Futakawa, M. et al.
1-MW pulsed spallation neutron source(JSNS) at J-PARC
Neutron News, vol.22, 15 (2011)

Nuclear data study at J-PARC BL04
Nucl. Instrum. Meth. A, vol.600, 332 (2009)

A-135
Hayashi, M. et al.
Construction of Ibaraki Prefectural Neutron
Spectrometers
Nucl. Instrum. Meth. A, vol.600, 14 (2009)

A-146
Greene, G. et al.
Neutron Interferometric Search for Shortrange Gravity Vladimir Gudkov
Nucl. Instrum. Meth. A, vol.611, 153 (2009)

A-136
Oku, T. et al.
Pulsed Neutron Beam Control using a
Magnetic Multiplet Lens
Nucl. Instrum. Meth. A, vol.600, 100 (2009)

A-147
Sugai, I. et al.
Double-layer effects on the lifetime of newly
developed HBC-foils for RCS of J-PARC
Nucl. Instrum. Meth. A, vol.613, 457 (2010)

A-137
Shinohara, T. et al.
Design and Performance Analyses of the
New Time-of-flight smaller-angle Neutron
Scattering Instrument at J-PARC
Nucl. Instrum. Meth. A, vol.600, 111 (2009)

A-148
Maekawa, F. et al.
First neutron production utilizing J-PARC
pulsed spallation neutron source JSNS andneutronic performance demonstrated
Nucl. Instrum. Meth. A, vol.620, 159 (2010)

A-138
Suzuki, J. et al.
Object-oriented Data Analysis Framework
for Neutron Scattering Experiments
Nucl. Instrum. Meth. A, vol.600, 123 (2009)

A-149
Iwamoto, Y. et al.
Measurements and Monte Carlo calculationsof neutron production cross-sections at 180°
for the 140 MeV proton incident reactions
on carbon, iron, and gold
Nucl. Instrum. Meth. A, vol.620, 484 (2010)

A-139
Iwashita, H. et al.
Simulation Study of a Pulsed Neutron
Focusing using a Pulsed Electromagnetic
Lens Coupled with a Permanent Magnet
Nucl. Instrum. Meth. A, vol.600, 129 (2009)
A-140
Hoshikawa, A. et al.
Development of an Automatic Sample
Changer for iMATERIA
Nucl. Instrum. Meth. A, vol.600, 203 (2009)
A-141
Nakano, T. et al.
Neutron magnetic scattering studies on
ferromagnetism in potassium nanoclusters
arrayed in zeolite A Trial experiments
Nucl. Instrum. Meth. A, vol.600, 240 (2009)
A-142
Sugiyama, M. et al.
SANS Simulation of Aggregated Protein in
Aqueous Solution
Nucl. Instrum. Meth. A, vol.600, 272 (2009)
A-143
Tomota, Y. et al.
In Situ TOF Neutron Diffraction During Phase
Transformation in an Engineering Steel
Nucl. Instrum. Meth., vol.A600, 313 (2009)
A-144
Ueno, H. et al.
Partial Structures of molten AgBr
Nucl. Instrum. Meth. A, vol.600, 322 (2009)
A-145
Igashira, M. et al.

A-150
Yamamoto, M. et al.
Simulation of longitudinal beam
manipulation during multi-turn injection in
J-PARC RCS
Nucl. Instrum. Meth. A, vol.621, 15 (2010)
A-151
Hayakawa, T. et al.
Nondestructive assay of plutonium andminor actinide in spent fuel using nuclear
resonance fluorescence with laser Compton
scattering γ-rays
Nucl. Instrum. Meth. A, vol.621, 695 (2010)
A-152
Yokoyama, M. et al.
Performance of multi-pixel photon counters
for the T2K near detectors
Nucl. Instrum. Meth. A, vol.622, 567 (2010)
A-153
Nishikawa, K. et al.
Recent status of accelerator neutrino
experiments
Nucl. Instrum. Meth. A, vol.623, 17 (2010)
A-154
Ohshita, H. et al.
Development of a neutron detector with a
GEM
Nucl. Instrum. Meth. A, vol.623, 126 (2010)
A-155
Orme, D. et al
Development of multi-pixel photon
counters for the T2K long baseline

J-PARC Annual Report 2010     Publications

81
neutrinoexperiment
Nucl. Instrum. Meth. A, vol.623, 321 (2010)

Nuclear transmutation as a phase 2 project
Nucl. Phys. News, vol.19, 45 (2009)

A-156
Matsuoka, K. et al.
Development and production of
the ionization chamber for the T2K
muonmonitor
Nucl. Instrum. Meth. A, vol.623, 385 (2010)

A-167
Kino, K. et al.
Design of a collimator system of a neutron
beam line for neutron-nucleus reaction
measurements
Nucl. Technol., vol.168, 317 (2009)

A-157
Nakayoshi, K. et al.
DAQ-Middleware for MLF/J-PARC
Nucl. Instrum. Meth. A, vol.623, 537 (2010)

A-168
Mihara, S.
J-PARC kaon and muon programs
Nuovo Cimento, vol.33, 91 (2010)

A-158
Sato, H. et al.
Development of material evaluation methodby using a pulsed neutron transmission withpixel type detectors
Nucl. Instrum. Meth. A, vol.623, 597 (2010)

A-169
Ohnishi, H. et al.
Photo-induced Domain Type Collective
Structural Changes with Inter-layer σ-bondsin the Visible Region of Graphite
Phys. Rev. B, vol.79, 054111 (2009)

A-159
Nomura, M. et al.
The origin of magnetic alloy core buckling in
J-PARC 3 GeV RCS
Nucl. Instrum. Meth. A, vol.623, 903 (2010)

A-170
Ji, K. et al.
Quantum Monte Carlo Study on Speckle
Variation Due to Photorelaxation of
Ferroelectric Clusters in Para-electric Barium
Titanate
Phys. Rev. B, vol.79, 144304 (2009)

A-160
Matsuoka, K. et al.
Design and performance of the muon monitor
for the T2K neutrino oscillation experiment
Nucl. Instrum. Meth. A, vol.624, 591 (2010)
A-161
Iwamoto, Y. et al.
Quasi-monoenergetic neutron energy
spectra for 246 and 389 MeV 7Li(p,n)
reactions at angles from 0° to 30°
Nucl. Instrum. Meth. A, vol.629, 43 (2011)
A-162
Sawada, S.
J-PARC Facility
Nucl. Phys. A, vol.834, 701c (2010)
A-163
K.TanakaConstruction and Status of the Hadron
Experimental Hall
Nucl. Phys. A, vol.835, 81 (2010)
A-164
Takahashi, T.
Experimental Apparatus in the Hadron Hall
at J-PARC
Nucl. Phys. A, vol.835, 88 (2010)
A-165
Kim, M. et al.
Coincidence measurement of the weak
decay of 12ΛC and the three-body weak
decay process (J-PARC 50GeV PS E18)
Nucl. Phys. A, vol.835, 434 (2010)
A-166
Oigawa, H.

A-171
Ohnishi, H. et al.
Generation and Growth of sp3-bonded
Domains by Visible Photon Irradiation ofGraphitePhys. Rev. B, vol.80, 014112 (2009)
A-172
Ishida, K. et al.
Site-dependent Lattice Dynamics of PhotoInduced Structural Change
Phys. Rev. B, vol.80, 140301 (2009)close to metal-insulator boundary probed
by muon spin rotation
Phys. Rev. B, vol.82, 94413 (2010)
A-177
Shamoto, S. et al.
Inelastic neutron scattering study of theresonance mode in the optimally doped
pnictide superconductor LaFeAsO0.92F0.08
Phys. Rev. B, vol.82, 172508 (2010)
A-178
Sugiyama, J. et al.
Low-temperature magnetic properties andhigh-temperature diffusive behavior of LiNiO2
investigated by muon-spin spectroscopy
Phys. Rev. B, vol.82, 224412 (2010)
A-179
Sugiyama, J. et al.
Magnetic and diffusive nature of LiFePO4
investigated by muon spin rotation andrelaxation
Phys. Rev. B, vol.84, 054430 (2011)
A-180
Iida, K. et al.
Inelastic neutron scattering study of themagnetic fluctuations in Sr2RuO4
Phys. Rev. B, vol.84, 060402 (2011)
A-181
Ishikado, M. et al.
s±-like spin resonance in the iron-based
nodal superconductor BaFe2(As0.65P0.35)2
observed using inelastic neutron scattering
Phys. Rev. B, vol.84, 144517 (2011)
A-182
Yamada, N.L. et al.
Nanopore Formation on Unilamellar Vesicles
of Long- and shortchain Lipids
Phys. Rev. E, vol.79, 32902 (2009)

A-173
Nishioka, K. et al.
Early-stage real-time Dynamics of Interlayer
sp3-bond Formation by Visible-light
Irradiation of Graphite
Phys. Rev. B, vol.80, 235420 (2009)

A-183
Inoue, R. et al.
Glass Transition and Molecular Mobility in
Polymer Thin Films
Phys. Rev. E, vol.80, 031802 (2009)

A-174
Akiyama, R. et al.
Short-range spin correlations in β''LiFeO2 from bulk magnetization, neutron
diffraction, and μSR experiments
Phys. Rev. B, vol.81, 24404 (2010)

A-184
Hishida, M. et al.
Morphological Development ofMultilamellar Phospholipid Film Depending
on Drying Kinetics
Phys. Rev. E, vol.80, 51407 (2009)

A-175
Park, J. et al.
Doping dependence of spin-lattice coupling
and two-dimensional ordering in multiferroic
hexagonal Y1-xLuxMnO3 (0<-x<-1)
Phys. Rev. B, vol.82, 54428 (2010)

A-185
Kanasaki, J. et al.
Formation of sp3-bonded Carbon
Nanostructures by Femtosecond Laser
Excitation of Graphite
Phys. Rev. Lett., vol.102, 087402 (2009)

A-176
Miyazaki, M. et al.
Magnetic ground state of pyrochlore oxides

A-186
Sadakane, K. et al.
Multilamellar Structures Induced byPublications     J-PARC Annual Report 2010

82
Hydrophilic and Hydrophobic Ions
Added to a Binary Mixture of D2O and3-Methylpyridine
Phys. Rev. Lett., vol.103, 167803 (2009)
A-187
Namikawa, K. et al.
Direct Observation of the Critical Relaxationof Polarization Clusters in BaTiO3 Using a
Pulsed X-Ray Laser TechniquePhys. Rev. Lett., vol.103, 197401 (2009)
A-188
Ohara, K. et al.
Structural Analysis of Lithium Lanthanum
Titanate Perovskite Structure
Phys. Status Solidi C, vol.6, 1004 (2009)
A-189
Nagao, M. et al.
Full Fitting Analysis of the Relative
Intermediate Form Factor Measured by
Neutron Spin Echo
Physica B, vol.404, 2603 (2009)
A-190
Takeda, H. et al.
Detector Area Expansion at iNSE Neutron
Spin Echo SpectrometerPhysica B, vol.404, 2607 (2009)
A-191
Bleuel, M. et al.
A Small Angle Neutron Scattering (SANS)
Experiment using Very Cold Neutrons (VCN)
Physica B, vol.404, 2629 (2009)
A-192
Shinohara, T. et al.
Design of a Neutron Polarizer Using
Polarizing Super Mirrors for the TOF-SANS
Instrument at the J-PARC
Physica B, vol.404, 2640 (2009)
A-193
Taketani, K. et al.
Highly Polarized Very Cold Neutrons
through a Permanent Magnet Quadrupole
Physica B, vol.404, 2643 (2009)
A-194
Yamada, M. et al.
Development of Modulating Permanent
Magnet Sextupole Lens for Focusing ofPulsed Cold Neutrons
Physica B, vol.404, 2646 (2009)
A-195
Ino, T. et al.
Development of a Compact on-beam SEOP
Neutron Spin Filter
Physica B, vol.404, 2667 (2009)
A-196
Kira, H. et al.
Development and test of SEOP neutron spin
filter in Japan

Physica B, vol.406, 2433 (2011)
A-197
Arimoto, Y. et al.
External Cavity Design of High-Power Diode
Laser for Polarized Helium-3 Neutron Spin
Filters Based on Spin-Exchange Optical
Pumping
Physica B, vol.406, 2439 (2011)
A-198
Sakaguchi, Y. et al.
Research on glass cells for 3He neutron spin
filters
Physica B, vol.406, 2443 (2011)
A-199
Shamoto, S. et al.
Spin excitations in iron oxypnictide
superconductor system
Physica C, vol.470, S284 (2010)
A-200
Suzuki, A.
KamLAND and T2K
Prog. Patr. Nucl. Phys., vol.65, 1 (2010)
A-201
Satoh, D. et al.
Experimental method for neutron elastic
scattering cross-section measurement inintermediate energy region at RCNP
Progress in Nuclear Science and Technology,
vol.1, 20 (2011)
A-202
Satoh, D. et al.
Measurement of neutron elastic scatteringcross sections for carbon at 134 MeV
Radiat. Meas., vol.45, 1159 (2010)
A-203
Nojiri, H. et al.
Neutron Diffraction in Pulsed High Magnetic
FieldsRADIOISOTOPES, vol.59, 509 (2010)
A-204
Suzuya, K.
Structure analysis of liquids and disorderedmaterials using pulsed neutron diffraction
and total scatteirngRadioisotopes, vol.60, 63 (2011)
A-205
Ueno, A. et al.
Interesting experimental results in Japan
Proton Accelerator Research Complex H- ionsource development
Rev. Sci. Instrum., vol.81, 02A720 (2010)
A-206
Abe, J. et al.
A Cubic-anvil high-pressure device forpulsed neutron powder diffraction
Rev. Sci. Instrum., vol.81, 043910 (2010)

A-207
Sagisaka, A. et al.
Proton generation and terahertz radiationfrom a thin-foil target with a high-intensity
laser
Reza Kenkyu, vol.38, 702 (2010)
A-208
Eto, T. et al.
Ultra-high-speed image signal accumulation
sensorSensors (Internet), vol.10, 4100 (2010)
A-209
Itoh, K. et al.
Structure of Na2S-GeS2 Glasses Studied byUsing Neutron and X-ray Diffraction andReverse Monte Carlo modeling
Solid State Ionics, vol.180, 351 (2009)
A-210
Adipranoto, D.S. et al.
Strucutre-property Relationships of Fast
Copper ion Conductor Cubic CuISolid State Ionics, vol.180, 492 (2009)
A-211
Mori, K. et al.
Crystal Structure of Fe-doped Lanthanum
Gallate for Oxygen Partial Pressures Studied
by Neutron Powder Diffraction
Solid State Ionics, vol.180, 541 (2009)
A-212
Osamura, K. et al.
Investigation of Stress/Strains and Related
Properties in Superconducting Wires andConductors by Means of Neutron Diffraction
at J-PARC
Teion Kogaku, vol.45, 135 (2010)
A-213
Tatsumoto, H. et al.
Dynamic Characteristics of the Cryogenic
Hydrogen System for a Spallation Neutron
Source at J-PARC
Teion Kogaku, vol.45, 181 (2010)
A-214
Tatsumoto, H. et al.
Dynamic characteristics of the cryogenichydrogen system for a spallation neutron
source at J-PARC
Teion Kogaku, vol.45, 181 (2010)
A-215
Naoe, T. et al.
Bending fatigue strength of austenitic
stainless steel SUS316 in mercury
Zairyo, vol.59, 309 (2010)

J-PARC Annual Report 2010     Publications

83

Conference Reports and Books
C-001
Tatsumoto, H. et al.
Pressure fluctuation behavior in the cryogenichydrogen system caused by a 100 kW proton
beam injection
AIP Conf. Proc., vol.1218, 289 (2010)

AIP Conf. Proc., vol.1257, 755 (2010)

C-002
Tatsumoto, H. et al.
Development of the cryogenic hydrogen system
for a spallation neutron source in J-PARC
AIP Conf. Proc., vol.1218, 297 (2010)

C-013
Haga, Y. et al.
Magnetism and superconductivity in the
new family of actinide compounds; AnPd5Al2
IOP Conf. Series; Materials Science andEngineering, vol.9, 012046 (2010)

C-003
Makida, Y. et al.
CRYOGENIC SYSTEM FOR J-PARC NEUTRINO
SUPERCONDUCTING MAGNET BEAM LINEAIP Conf. Proc., vol.1218, 531 (2010)
C-004
Okamura, T. et al.
CRYOGENIC PERFORMANCE OF A
SUPERCONDUCTING MAGNET SYSTEM FOR
THE J-PARC NEUTRINO BEAM LINEAIP Conf. Proc., vol.1218, 539 (2010)
C-005
Tatsumoto, H. et al.
Development of a simulation code for a cooldown process of the cryogenic hydrogen system
AIP Conf. Proc., vol.1218, 1154 (2010)
C-006
Tatsumoto, H. et al.
Pressure drop evaluation of the hydrogen
circulation system for JSNSAIP Conf. Proc., vol.1218, 1162 (2010)
C-007
Okamura, N. et al.
Re-analysis of the T2KK physics potential
with backgrounds
AIP Conf. Proc., vol.1222, 79 (2010)
C-008
Nakahara, K. et al.
The Next Generation Muon Source at J-PARC/MLF
AIP Conf. Proc., vol.1222, 420 (2010)
C-009
Sato, Y. et al.
Construction and Beam Commissioning of
J-PARC Hadron Experimental Facility
AIP Conf. Proc., vol.1235, 301 (2010)
C-010
Sawada, S.
Hadron Physics at J-PARC
AIP Conf. Proc., vol.1257, 129 (2010)
C-011
Hiraiwa, T. et al.
A search for deeply bound kaonic nuclear
states at J-PARC

C-012
Fujiwara, T. et al.
2-Dimensional He-3 M-MSGC with Floating Pads
IEEE Nuc. Sci. Conf. R., 128 (2010)

C-014
Abe, J. et al.
High pressure experiments with theengineering materials diffractometer (BL-19)
at J-PARC
J. Phys.: Conf. Ser., vol.215, 012023 (2010)
C-015
Hattori, T. et al.
For High-Pressure Experiments Using Total
Scattering Spectrometer NOVA at J-PARC
J. Phys.: Conf. Ser., vol.215, 12024 (2010)
C-016
Arima, H. et al.
Designing PLANET: Neutron beamline forhigh-pressure material science at J-PARC
J. Phys.: Conf. Ser., vol.215, 12025 (2010)
C-017
Shimomura, K. et al.
Pilot experiment for muonium photoionization in GaAs
J. Phys.: Conf. Ser., vol.225, 12004 (2010)
C-018
Doyama, M. et al.
Applications of Imaging Plates to the Studyof Positron and Muon Research
J. Phys.: Conf. Ser., vol.225, 12006 (2010)
C-019
Higemoto, W. et al.
JAEA-ASRC muon research at J-PARC MUSE
J. Phys.: Conf. Ser., vol.225, 12012 (2010)
C-020
Higemoto, W. et al.
Muon Knight shift measurements in CeCoIn5
below 17 kOe
J. Phys.: Conf. Ser., vol.225, 12013 (2010)
C-021
Ito, T.U. et al.
The EPICS-based remote control system formuon beam line devices at J-PARC MUSE
J. Phys.: Conf. Ser., vol.225, 12022 (2010)
C-022
Miyake, Y. et al.

J-PARC Muon Facility, MUSE
J. Phys.: Conf. Ser., vol.225, 12036 (2010)
C-023
Ninomiya, K. et al.
Development of elemental analysis bymuonic X-ray measurement in J-PARC
J. Phys.: Conf. Ser., vol.225, 12040 (2010)
C-024
Strasser, P. et al.
J-PARC Decay Muon Channel Construction
StatusJ. Phys.: Conf. Ser., vol.225, 12050 (2010)
C-025
Sugiyama, J. et al.
Microscopic indicator for thermodynamic
stability of hydrogen storage materials
provided by muon-spin spectroscopy
J. Phys.: Conf. Ser., vol.225, 12051 (2010)
C-026
Tatsumoto, H. et al.
Development of a thermal-hydraulics
experimental system for high Tc
superconductors cooled by liquid hydrogen
J. Phys.: Conf. Ser., vol.234, 032056 (2010)
C-027
Tatsumoto, H. et al.
Forced convection heat transfer of subcooled
liquid nitrogen in a vertical tube
J. Phys.: Conf. Ser., vol.234, 032057 (2010)
C-028
Kaoru.Taketani
Contrast reduction due to small angle scatteringin a neutron multilayer interferometer
J. Phys.: Conf. Ser., vol.251, 12071 (2010)
C-029
Oku, T. et al.
Development of a triplet magnetic lenssystem to focus a pulsed neutron beam
J. Phys.: Conf. Ser., vol.251, 12078 (2010)
C-030
Hoshikawa, A. et al.
Automatic sample changer for IBARAKI
materials design diffractometer (iMATERIA)
J. Phys.: Conf. Ser., vol.251, 12083 (2010)
C-31
Mitamura, K. et al.
Advanced Neutron Reflectometer for
Investigation on Dynamic/Static Structuresof Soft-Interfaces in J-PARC
J. Phys.: Conf. Ser., vol.272, 0120107 (2011)
C-032
Kobayashi, M. et al.
Characterization of Swollen States ofPolyelectrolyte Brushes in Salt Solution by

Publications     J-PARC Annual Report 201084
Neutron Reflectivity
J. Phys.: Conf. Ser., vol.272, 012019 (2011)
C-033
Terayama, Y. et al.
Chain dimensions in free and immobilized
brush states of polysulfobetaine in aqueous
solution at various salt concentrations
J. Phys.: Conf. Ser., vol.272, 012010 (2011)
C-034
Torikai, N. et al.
Depth distribution of different solvents in aphase-separated block copolymer thin film
J. Phys.: Conf. Ser., vol.272, 012027 (2011)
C-035
Kiyanagi, Y.
Neutronic Characteristics of Beam Line BL04
for Nuclear Data Measurements at J-PARC
MLF
Proc. 2009 Annual Symposium on Nuclear
Data (NDS 2009), 3 (2010)
C-036
Harada, H. et al.
Status and Future Perspectives of Nuclear
Data Measurements at J-PARC MLF BL04
Proc. 2009 Annual Symposium on Nuclear
Data (NDS 2009), 9 (2010)
C-037
J-PARC Accelerator Division
STATUS OF J-PARC ACCELERATORS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 8 (2010)
C-038
Tomizawa, M. et al.
BEAM COMMISSIONING OF J-PARC SLOWEXTRACTION
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 186 (2010)
C-039
Takano, J. et al.
APERTURE SURVEY OF THE J-PARC MAIN RING
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 351 (2010)
C-040
Kobayashi, H. et al.
CHALLENGES TO ACHIEVING HIGH-POWER
OPERATION OF THE J-PARC MR
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 370 (2010)
C-041
Shirakabe, Y. et al.
Leak field analysis of the J-PARC MR slow
extraction septum magnets
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 374 (2010)
C-042
Arakaki, Y. et al.
CIRCULATION SYSTEM OF FLUORINERT IN

J-PARC ESS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 377 (2010)
C-043
Kurimoto, Y. et al.
Bunch-by-bunch Feedback System for
J-PARC Main Ring
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 380 (2010)
C-044
Ito, Y. et al.
J-PARC Accelerator MPS functionality forHigh Availability
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 383 (2010)
C-045
Agari, K. et al.
Design and Development of Beam Dump for
J-PARC Hadron-hall [4]Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 386 (2010)
C-046
Wei, G. et al.
Simulation Study of Error Effects for the
J-PARC Linac Energy UpgradeProc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 453 (2010)
C-047
Yamamoto, M. et al.
Longitudinal Particle Simulation of J-PARC
RCS for 400 MeV injection
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 456 (2010)
C-048
Makimura, S. et al.
Remotely Controlled Replacement of HighlyRadioactive Components in J-PARC/MUSE
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 479 (2010)
C-049
Namekawa, Y. et al.
Experiment of Optimal Filament Shape for
the J-PARC H- Ion Source
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 484 (2010)
C-050
Shimada, T. et al.
A DUMMY BEAM PIPE WITH IMPROVED GAP
CONNECTIONS FOR A HIGH POWER TESTCAVITY FOR J-PARC RCS MA CORES
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 549 (2010)
C-051
Ao, H. et al.
ACS CAVITY FOR J-PARC LINAC
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 552 (2010)

C-052
Ito, T. et al.
Decrease in flow rate of cooling water for
DTQ and its measures
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 555 (2010)
C-053
Togashi, T. et al.
Current status of the kicker thyratron
operation in J-PARC 3GeV RCS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 579 (2010)
C-054
Takayanagi, T. et al.
Performance improvement plan of the bumpsystem in J-PARC 3-GeV RCS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 584 (2010)
C-055
Nakamura, S. et al.
STABILIZATION OF THE CONTROL SYSTEM
ON MAGNET POWER SUPPLIES IN J-PARC
MAIN RING
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 587 (2010)
C-056
Hatakeyama, S. et al.
A SYSTEM FOR MONITORING OF THE
TRANSVERSE INJECTION ERROR AND
BETATRON TUNE IN J-PARC MR
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 631 (2010)
C-057
Sato, K. et al.
DESIGN STUDY OF THE RESONANCE TYPE
ELECTROSTATIC CURRENT MONITOR FOR
J-PARC RCS H0 DUMP BEAM MONITORING
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 634 (2010)
C-058
Toyama, T. et al.
Stripline BPM at the J-PARC MR
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 638 (2010)
C-059
Kikuzawa, N. et al.
Development of fast beam-stop systemusing RF chopper
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 677 (2010)
C-060
Sawabe, Y. et al.
Development of control system for J-PARC
LINAC ACS section
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 680 (2010)
C-061
Onuma, S. et alPublications     J-PARC Annual Report 2009

J-PARC Annual Report 2010     Publications

85
THE SPILL FEEDBACK CONTROL UNIT FOR
THE J-PARC SLOW EXTRACTION
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 687 (2010)
C-062
Kamikubota, N. et al.
COMPUTER ENVIRONMENT FOR J-PARC MR
OPERATION
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 690 (2010)
C-063
Takagi, M. et al.
CPU LOADS AND NETWORK TRAFFIC IN
J-PARC MR CONTROL SYSTEM
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 693 (2010)
C-064
Kobayashi, T. et al.
BEAM TEST OF CHOPPED BEAM LOADINGCOMPENSATION FOR THE J-PARC LINAC 400MeV UPGRADE
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 696 (2010)
C-065
Uota, M. et al.
PRESSURE RISE and BEAM LOSS with HIGHINTENSITY BEAM in J-PARC MR
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 721 (2010)
C-066
Oguri, H. et al.
OPERATION STATUS OF THE J-PARC NEGATIVEHYDROGEN ION SOURCE
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 829 (2010)
C-067
Ohmori, C. et al.
Impedance Reduction of J-PARC MR Cavities
in Summer, 2009
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 874 (2010)
C-068
Nomura, M. et al.
Impedance measurements of RF cavities in
J-PARC synchrotrons
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 877 (2010)
C-069
Chishiro, E. et al.
972MHz HIGH POWER RF SOURCES FOR
J-PARC LINAC
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 936 (2010)
C-070
Miura, A. et al.
MEBT-chopper tuning procedure and its
tolerance
Proc. of 7th Annual Meeting of Particle

Accelerator Society of Japan, 939 (2010)
C-071
Fujimori, H. et al.
FIELD ANALYSIS and OPTIMIZATION for
DECAY MUON LINE MAGNETS in J-PARC
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 961 (2010)
C-072
Ueno T, et al.
Current status of the injection bump system
in J-PARC 3-GeV RCS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 965 (2010)
C-073
Yanaoka, E. et al.
FIELD MEASUREMENT OF BUMP MAGNETSFOR J-PARC SLOW EXTRACTION
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 969 (2010)
C-074
Kobayashi, H. et al.
DEVELOPMENT OF SLANTING SADDLESHAPE INDIRECTLY COOLED RADIATIONRESISTANT MAGNET
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 979 (2010)
C-075
Hanamura, K. et al.
High voltage performance of Residual Gas
Ionization Profile Monitors for J-PARC MR
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1010 (2010)
C-076
Hatakeyama, S. et al.
ONLINE MONITORING OF THE H0 DUMP
BEAM CURRENT DURING USER OPERATIONOF J-PARC RCS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1013 (2010)
C-077
Igarashi, S. et al.
BEAM PROFILE MEASUREMENT USINGFLYING WIRE AT THE J-PARC MR
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1016 (2010)
C-078
Toyoda, A. et al.
DEVELOPMENT OF π/K DIFFERENTIAL FITCHTYPE CHERENKOV COUNTER FOR J-PARC
K1.1BR BEAMLINE
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1019 (2010)
C-079
Saeki, R. et al.
Deformation of a HBC stripping foil due tobeam irradiation in J-PARC RCS
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1025 (2010)

C-080
Kawase, M. et al.
Reconstructions of the control system for the
charge exchange system at the 3Gev RCS in
J-PARC
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1065 (2010)
C-081
Fang, Z. et al.
DEVELOPMENT OF LLRF CONTROLSOFTWARE FOR THE J-PARC 400 MeV LINAC
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1068 (2010)
C-082
Kobayashi, Y. et al.
Control System for Muon Rotating Target in
J-PARC/MUSE
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1071 (2010)
C-083
Kimura, T. et al.
SPILL FEEDBACK CONTROL FOR THE J-PARC
SLOW EXTRACTION
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1076 (2010)
C-084
Schnase, A. et al.
Simulation of narrow-band longitudinalnoise applied to J-PARC Main Ring
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1079 (2010)
C-085
Kobayashi, T.
Stabiliy evaluation with long FB loop delay in
the ACS cavity RF control for the J-PARC 400MeV Linac
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1082 (2010)
C-086
Yamanoi, Y. et al.
PLAN OF PRODUCTION TARGET AT HADRONBEAM LINE
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1132 (2010)
C-087
Imamura, S. et al
ELECTRICAL AND MECHANICAL FACILITIESFOR THE J-PARC 50 GeV SYNCHROTRON
Proc. of 7th Annual Meeting of Particle
Accelerator Society of Japan, 1206 (2010)
C-088
Iwamoto, Y. et al.
Characterisation of quadi-monoenergetic
neutron energy spectra using 7Li(p,n)
reactions at 246-389 MeV
Proc. of 10th Meeting of the Task Force on
Shielding Aspects of Accelerators, Targets andIrradiation Facilities (SATIF-10), 53 (2011)

Publications     J-PARC Annual Report 2010

J-PARC Annual Report 2009     Publications

86
C-089
Sako, H. et al.
Development of a new Java channel accesslibrary JCAL
Proc. of 12th Int. Conf. on Accelerator andLarge Experimental Physics Control Systems(ICALEPCS 2009) (CD-ROM), 842 (2009)
C-090
Sako, H. et al.
Development of high-level application
framework with a script language JCE for
accelerator beam commissioning
Proc. of 12th Int. Conf. on Accelerator andLarge Experimental Physics Control Systems(ICALEPCS 2009) (CD-ROM), 848 (2009)
C-091
Ouchi, N.
J-PARC upgradeProc. of 14th Int. Conf. on RF Superconductivity(SRF 2009), 934 (2009)
C-092
Ikeda, K. et al.
Hydrogen Storage in Aluminum Hydride
Proc. of 17th Annual International Conference
on COMPOSITES/NANO ENGINEERING (ICCE17), 393 (2009)
C-093
Sako, H.
Current status and performance of the
J-PARC accelerators
Proc. of 17th Int. Conf. on Nuclear Engineering(ICONE-17) (CD-ROM), 10 (2009)
C-094
Ikeda, K. et al.
Aluminum Hydride for Hydrogen Storage
Proc. of 18th International Symposium on
Processing and Fabrication of Advanced
Materials (PFAMXVIII), 1, 81 (2009)
C-095
Michizono, S. et al.
Digital feedback control for 972 MHz RF
system of J-PARC linac
Proc. of 2009 Particle Accelerator Conf. (PAC'09) (DVD-ROM), 2201 (2009)
C-096
Kobayashi, T. et al.
Automatic frequency matching for cavity
warming-up in J-PARC linac digital LLRF control
Proc. of 2009 Particle Accelerator Conf. (PAC'09) (DVD-ROM), 2213 (2009)

Correlation between the averaged
internal structure and the coercive force ofneodymium-iron-boron (Nd-Fe-B) sinteredmagnets investigated by small-angle
neutron scattering
Proc. of 21st Int. Workshop on Rare-Earth
Permanent Magnets and their Applications(REPM 2010), 161 (2010)
C-099
Fang, Z. et al.
LLRF control system of the J-PARC linac
Proc. of 24th Int. Linear Accelerator Conf.
(LINAC 2008) (CD-ROM), 1039 (2009)
C-100
Kobayashi, T. et al.
Pulse-by-pulse switching of beam loading
compensation in J-PARC linac RF control
Proc. of 24th Int. Linear Accelerator Conf.
(LINAC 2008) (CD-ROM), 1054 (2009)
C-101
Sako, H. et al.
Transverse beam matching and orbit
corrections at J-PARC LINAC
Proc. of 24th Int. Linear Accelerator Conf.
(LINAC 2008) (CD-ROM), 260 (2009)
C-102
Ueno, A.
Unique features of the J-PARC linac and its
performance; Lessons learnt
Proc. of 24th Int. Linear Accelerator Conf.
(LINAC 2008) (CD-ROM), 343 (2009)
C-103
Yoshikawa, H. et al.
Performance of the control system for the
J-PARC LINAC
Proc. of 24th Int. Linear Accelerator Conf.
(LINAC 2008) (CD-ROM), 52 (2009)
C-104
Nagamiya, S.
OVERVIEW OF THE STATUS OF J-PARC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 1 (2010)
C-105
Kobayashi, T.
Stability evaluation for long FB loop delayin the ACS cavity field control for the J-PARC
linac 400-MeV upgradeProc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 253 (2010)

C-097
Sato, S. et al.
Study of J-PARC linac beam position monitor
as phase monitor
Proc. of 2009 Particle Accelerator Conference(PAC '09) (DVD-ROM), 3591 (2009)

C-106
Kobayashi, T. et al.
BEAM TEST OF CHOPPED BEAM LOADINGCOMPENSATION FOR THE J-PARC LINAC 400MEV UPGRADE
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 256 (2010)

C-098
Takeda, M. et al.

C-107
Ao, H.

Status of J-PARC linac energy upgradeProc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 357 (2010)
C-108
Hasegawa, K. et al.
Status of the J-PARC linac
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 449 (2010)
C-109
Morishita, T. et al.
VANE MACHINING BY THE BALL-END-MILL
FOR THE NEW RFQ IN THE J-PARC LINAC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 518 (2010)
C-110
Morishita, T. et al.
VACUUM BRAZING OF THE NEW RFQ FOR
THE J-PARC LINAC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 521 (2010)
C-111
Sako, H. et al.
REDUCTION OF TRANSVERSE EMITTANCEGROWTH IN J-PARC LINAC DTL
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 563 (2010)
C-112
Ito, T. et al.
OPERATION EXPERIENCES OF THE DTL/SDTLFOR THE J-PARC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 566 (2010)
C-113
Naito, F. et al.
RADIATION FROM THE SDTL OF J-PARC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 569 (2010)
C-114
Miura, A. et al.
Residual gas pressure dependence of beam loss
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 587 (2010)
C-115
Miura, A. et al.
STATUS OF BEAM LOSS EVALUATION AT
J-PARC LINAC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 590 (2010)
C-116
Kawamura, M. et al.
POWER SUPPLY SYSTEM FOR KLYSTRON IN
J-PARC LINAC
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 887 (2010)
C-117
Kondo, Y. et al.
Simulation study of the RF chopper

Publications     J-PARC Annual Report 2009

J-PARC Annual Report 2010     Publications

87
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 911 (2010)
C-118
Wei, G. et al.
SIMULATION STUDY OF DEBUNCHER SYSTEMFOR J-PARC LINAC ENERGY UPGRADE
Proc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 947 (2010)
C-119
Oguri, H. et al.
Status of the J-PARC negative hydrogen ion
sourceProc. of 25th Int. Linear Accelerator Conf.
(LINAC 2010) (CD-ROM), 1016 (2010)
C-120
Koseki, T.
HIGH INTENSITY ASPECTS OF THE J-PARC FACILITY
Proc. of the 46th ICFA Advanced Beam Dynamics
Workshop on High-Intensity and HighBrightness Hadron Beams (HB-2010), 16 (2010)
C-121
Hashimoto, Y. et al.
MULTI-RIBBON PROFILE MONITOR USINGCARBON GRAPHITE FOIL FOR J-PARC
Proc. of the 46th ICFA Advanced Beam Dynamics
Workshop on High-Intensity and HighBrightness Hadron Beams (HB-2010), 429 (2010)
C-122
Ikegami, M. et al.
MEASUREMENT AND SIMULATION IN J-PARC
LINAC
Proc. of the 46th ICFA Advanced Beam Dynamics
Workshop on High-Intensity and HighBrightness Hadron Beams (HB-2010), 548 (2010)
C-123
Densham, C.J. et al.
DESIGN OF THE T2K TARGET FOR A 0.75-MW
PROTON BEAM
Proc. of the 46th ICFA Advanced Beam Dynamics
Workshop on High-Intensity and HighBrightness Hadron Beams (HB-2010), 560 (2010)
C-124
Molodo, A.
OPERATION OF THE J-PARC MAIN RING WITH
THE MODERATE BEAM POWER: PREDICTIONSAND OBSERVATIONS
Proc. of the 46th ICFA Advanced Beam Dynamics
Workshop on High-Intensity and HighBrightness Hadron Beams (HB-2010), 610 (2010)
C-125
Maekawa, F. et al.
Distinctive features in neutronic performanceof JSNS
Proc. of 19th Meeting of the Int. Collaboration
on Advanced Neutron Sources (ICANS-19) (CDROM), 8 (2010)
C-126
Meigo, S. et al.

A Study of Proton Beam Profile on the Target
at JSNS
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) AO020 (2010)
C-127
Meigo, S. et al.
Beam Commissioning at JSNS of J-PARC
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) AO051 (2010)
C-128
Arai, M.
J-PARC status and Lessons Learnt from
Commissioning
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) FO015 (2010)
C-129
Harada, M. et al.
Imaging experiments on NOBORU at MLF"Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IO077 (2010)"
C-130
Itoh, S. et al.
Construction Status of High Resolution
Chopper Spectrometer (HRC) at J-PARC
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IO079 (2010)
C-131
Inamura, Y. et al.
Software Development on Chopper
Spectrometers for MLF, J-PARC
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP117 (2010)
C-132
Itoh, S. et al.
Development of Fermi Chopper at KEK"Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP120 (2010)"
C-133
Itoh, S. et al.
Development of T0 Chopper at KEK
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP121 (2010)
C-134
Kajimoto, R. et al.
Comissioning of the Fermi-Chopper
Spectrometer 4SEASONS at J-PARC—
Background Study
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP122 (2010)

C-135
Sakasai, K. et al.
Development and Installation of Neutron
Detectors for Engineering Materials
Diffractometer at J‐PARC
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP131(2010)
C-136
Toh, K. et al.
Operation of Two-dimensional Gas Detector
Using Micro-pixel Detector Element UnderHigh Pressure for Neutron Measurement
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP138 (2010)
C-137
Yokoo, T. et al.
Gas Desorption Examination of B4C Resin for
Neutron Vacuum ChamberProc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) IP144 (2010)
C-138
Futakawa, M. et al.
EXPERIENCE IN EARLY OPERATION AT JSNS
OF J-PARC
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) TO033 (2010)
C-139
Harada, M. et al.
MEASUREMENT OF NEUTRONIC
CHARACTERISTICS OF JSNS
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) TO038 (2010)
C-140
Ida, M. et al.
The Effect of Gas Bubble Injection for
Pressure Wave Mitigation in High-Power
Neutron Sources − Differences andSimilarities between Mercury and Water
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) TO040 (2010)
C-141
Kasugai, Y. et al.
MONITORING SYSTEM OF MERCURYTARGET FAILURE USING RADIOACTIVITY
MEASUREMENT
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) TO044 (2010)
C-142
Kogawa, H. et al.
DEVELOPMENT OF BUBBLE INJECTIONTECHNIQUE IN JSNS MERCURY TARGET
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron SourcesPublications     J-PARC Annual Report 2010

88
(ICANS-XIX), (CD) TO047 (2010)
C-143
Maekawa, F. et al.
DISTINCTIVE FEATURES IN NEUTRONICPERFORMANCE OF JSNS
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) TO049 (2010)
C-144
Kai, T. et al.
DISCUSSIONS ON SPALLATION PRODUCTS
BEHAVIOUR BY MEASURING MERCURY ANDSUBSTANCES ADHERING INSIDE THE MERCURY
CIRCULATION SYSTEM IN MLF/J-PARC
Proc. of the 19th Meeting of the Int.
Collaboration on Advanced Neutron Sources(ICANS-XIX), (CD) TO152 (2010)
C-145
Seya, M. et al.
Possible applications of NDA systems using
Laser Compton Scattering (LCS) X-rays andγ-rays in material accountancy and safeguards
verification for future nuclear fuel cycle facilities
Proc. of INMM 51st Annual Meeting (CD-ROM),
10 (2010)

C-152
Yamada, M. et al.
THE NOVEL METHOD OF FOCUSING-SANS
WITH ROTATING MAGNETIC SEXTUPOLELENS AND VERY COLD NEUTRONS
Proc. of IPAC'10, 427 (2010)
C-153
Kobayashi, H. et al.
J-PARC ACCELERATOR COMPLEX CONSTRUCTION
Proc. of IPAC'10, 612 (2010)
C-154
Yoshii, M. et al.
RECENT STATUS AND FUTURE PLAN OF
J-PARC MA LOADED RF SYSTEMS
Proc. of IPAC'10, 615 (2010)
C-155
Ao, H. et al.
Status of mass production of the ACS cavity
for the J-PARC linac energy upgradeProc. of IPAC'10, 618 (2010)
C-156
Hasegawa, K. et al.
Status of the J-PARC RFQ
Proc. of IPAC'10, 621 (2010)

C-146
Takeda, Y. et al.
LIFETIME MEASUREMENT OF HBC STRIPPER
FOIL USING 3.2 MEV NE  FOR RCS OF J-PARC
Proc. of IPAC'10, 202 (2010)

C-157
Hocchi, H. et al.
High-intensity beam operations in the
J-PARC 3-GeV RCS
Proc. of IPAC'10, 624 (2010)

C-147
Kawase, M. et al.
Reconstructions of the control system for the
charge exchange system at the 3GeV RCS in
J-PARC
Proc. of IPAC'10, 214 (2010)

C-158
Kinsho, M.
Status and progress of the J-PARC 3-GeV RCS
Proc. of IPAC'10, 627 (2010)

C-148
Fan, K. et al.
LOW LEAKAGE FIELD SEPTA FOR J-PARC
MAIN RING INJECTION SYSTEM UPGRADE
Proc. of IPAC'10, 295 (2010)
C-149
Igarashi, S. et al
MAGNETIC FIELD RIPPLE REDUCTION OF
MAIN MAGNETS OF THE J-PARC MAIN RING
USING TRIM COILS
Proc. of IPAC'10, 301 (2010)

C-159
Ikegami, M. et al.
Recent progress in the beam commissioningof J-PARC linac
Proc. of IPAC'10, 774 (2010)
C-160
Kondo, Y. et al.
Thermal characteristics of a new RFQ for J-PARC
Proc. of IPAC'10, 780 (2010)
C-161
Morishita, T. et al.
Fabrication of the new RFQ for the J-PARC linac
Proc. of IPAC'10, 783 (2010)

C-150
Ogitsu, T. et al.
OPERATION OF SUPERCONDUCTINGCOMBINED FUNCTION MAGNET SYSTEM FOR
J-PARC NEUTRINO BEAM LINE
Proc. of IPAC'10, 343 (2010)

C-162
Tejima, M. et al.
Shot-by-shot beam position monitor system forbeam transport line from RCS to MR in J-PARC
Proc. of IPAC'10, 978 (2010)

C-151
Meigo, S. et al.
BEAM COMMISSIONING OF SPALLATIONNEUTRON AND MUON SOURCE IN J-PARC
Proc. of IPAC'10, 424 (2010)

C-163
Toyama, T. et al.
Performance of the main ring BPM during
the beam commissioning at J-PARC
Proc. of IPAC'10, 981 (2010)

C-164
Yoshimura, K. et al.
Measurements of Proton Beam Extinction at
J-PARC
Proc. of IPAC'10, 984 (2010)
C-165
Sato, K. et al.
APPLICATION OF A SINGLE-WIRE
PROPORTIONAL COUNTER TO THE BEAM
LOSS MONITORING AT J-PARC MR
Proc. of IPAC'10, 990 (2010)
C-166
Hayashi, N. et al.
Beam based alignment of the beam position
monitors at J-PARC RCS
Proc. of IPAC'10, 1005 (2010)
C-167
Miura, A. et al.
Operational performance of wire scannermonitor in J-PARC linac
Proc. of IPAC'10, 1008 (2010)
C-168
Toyoda, A. et al.
DEVELOPMENT OF RADIATION REGISTANTOPTICS SYSTEM FOR HIGH INTENSITYPROTON BEAMLINE AT THE J-PARC
Proc. of IPAC'10, 1017 (2010)
C-169
Koseki, T.
CHALLENGES AND SOLUTIONS FOR J-PARC
COMMISSIONING AND EARLY OPERATION
Proc. of IPAC'10, 1304 (2010)
C-170
Fang, Z. et al.
LLRF controller upgrade for the J-PARC 400
MeV linac
Proc. of IPAC'10, 1434 (2010)
C-171
Tamura, F. et al.
DUAL-HARMONIC PHASE CONTROL IN THE
J-PARC RCS
Proc. of IPAC'10, 1443 (2010)
C-172
Schnase, A. et al.
APPLICATION OF DIGITAL NARROW BANDNOISE TO J-PARC MAIN RING
Proc. of IPAC'10, 1446 (2010)
C-173
Fujimori, H. et al.
ONLINE ANALYZER SYSTEM FOR THE
DEVELOPMENT OF THE LONG-LIVEDCHARGE-STRIPPING FOIL AT THE J-PARC
Proc. of IPAC'10, 1653 (2010)
C-174
Molod, A. et al.
STUDY OF THE BEAM DYNAMICS FOR THE'FAST EXTRACTION OPERATION SCENARIO

J-PARC Annual Report 2010     Publications

89
OF THE J-PARC MAIN RING
Proc. of IPAC'10, 1937 (2010)
C-175
Yamamoto, M. et al.
SIMULATION OF LONGITUDINAL EMITTANCECONTROL IN J-PARC RCS
Proc. of IPAC'10, 1940 (2010)
C-176
Shobuda, Y. et al.
Horizontal impedance of the kicker magnetof RCS at J-PARC
Proc. of IPAC'10, 2024 (2010)
C-177
Kamikubota, N. et al.
DATA ARCHIVE SYSTEM FOR J-PARC MAIN RING
Proc. of IPAC'10, 2680 (2010)
C-178
Takano, J. et al.
MAGNET PATTERN CONTROL SYSTEM OF THE
J-PARC MAIN RING
Proc. of IPAC'10, 2692 (2010)
C-179
Hatakeyama, S. et al.
The Data acquisition system of beam
position monitors in J-PARC main ring
Proc. of IPAC'10, 2698 (2010)
C-180
Tobiyama, M. et al.
BUNCH BY BUNCH FEEDBACK SYSTEMS FOR
J-PARC MR
Proc. of IPAC'10, 2767 (2010)
C-181
Onuma, S. et al
THE SPILL FEEDBACK CONTROL UNIT FOR
J-PARC SLOW EXTRACTION
Proc. of IPAC'10, 2770 (2010)
C-182
Yamamoto, K. et al.
Beam loss of J-PARC rapid cycling
synchrotron at several hundred kW operation
Proc. of IPAC'10, 2842 (2010)
C-183
Someya, H. et al.
MAGNETIC FIELD MEASUREMENT AND
RIPPLE REDUCTION OF QUADRUPOLEMAGNETS OF THE J-PARC MAIN RING
Proc. of IPAC'10, 3239 (2010)
C-184
Watanabe, Y. et al.
SUPPRESSION SCHEME OF COD VARIATIONCAUSED BY SWITCHING RIPPLE IN J-PARC
3GEV DIPOLE MAGNET POWER SUPPLY
Proc. of IPAC'10, 3242 (2010)
C-185
Takayanagi, T. et al.
Design of the pulse bending magnet for

switching the painting area between the
MLF and MR in J-PARC 3-GeV RCS
Proc. of IPAC'10, 3293 (2010)

First step analysis of hybrid type borondoped carbon stripper foils for RCS of J-PARC
Proc. of IPAC'10, 3924 (2010)

C-186
Watanabe, M. et al.
Operation of kicker system using thyratron of
the 3 GeV rapid cycling synchrotron of J-PARC
Proc. of IPAC'10, 3296 (2010)

C-197
Yoshimoto, M. et al.
Beam study results with HBC stripping foils
at the 3-GeV RCS in J-PARC
Proc. of IPAC'10, 3927 (2010)

C-187
Ohmori, C. et al.
DEVELOPMENTS OF MAGNETIC ALLOY
CORES WITH HIGHER IMPEDANCE FOR
J-PARC UPGRADE
Proc. of IPAC'10, 3711 (2010)

C-198
Yoshimoto, M. et al.
Improvements of the charge exchangesystem at the 3GeV RCS in J-PARC
Proc. of IPAC'10, 3930 (2010)

C-188
Shimada, T. et al.
THERMAL DEFORMATION OF MAGNETIC
ALLOY CORES FOR J-PARC RCS RF CAVITIES
Proc. of IPAC'10, 3717 (2010)
C-189
Nomura, M. et al.
CONDITION OF MA CORES IN THE RF
CAVITIES OF J-PARC SYNCHROTRONS AFTER
SEVERAL YEARS OF OPERATION
Proc. of IPAC'10, 3723 (2010)
C-190
Uota, M. et al.
VACUUM SURFACE SCRUBBING BY PROTON
BEAM IN J-PARC MAIN RING
Proc. of IPAC'10, 3858 (2010)
C-191
Arakaki, Y. et al.
ELECTROSTATIC SEPTUM FOR 50GEVPROTON SYNCHROTRON IN J-PARC
Proc. of IPAC'10, 3900 (2010)
C-192
Tomizawa, M. et al.
STATUS AND UPGRADE PLAN OF SLOWEXTRACTION FROM THE J-PARC MAIN RING
Proc. of IPAC'10, 3912 (2010)
C-193
Wei, G. et al.
Beam injection tuning of the J-PARC main ring
Proc. of IPAC'10, 3915 (2010)
C-194
Wei, G. et al.
Beam fast extraction tuning of the J-PARC
main ring
Proc. of IPAC'10, 3918 (2010)
C-195
Saha, P. K. et al.
Systematic beam loss study due to the foil
scattering at the 3-GeV RCS of J-PARC
Proc. of IPAC'10, 3921 (2010)
C-196
Yamazaki, Y. et al.

C-199
Kiyomichi, A. et al.
BEAM SPILL CONTROL FOR THE J-PARC SLOWEXTRACTION
Proc. of IPAC'10, 3933 (2010)
C-200
Ieiri, M. et al.
ELECTROSTATIC SEPARATOR AND K1.8
SECONDARY BEAMLINE AT THE J-PARC
HADRON-HALL
Proc. of IPAC'10, 4161 (2010)
C-201
Molod, A. et al.
EFFECTS OF THE FIELD LEAKAGE OF THE
SLOW EXTRACTION SEPTUM MAGNETS OF
THE J-PARC MAIN RING
Proc. of IPAC'10, 4674 (2010)
C-202
Takei, H. et al.
Estimation of acceptable beam trip frequenciesof accelerators for ADS and comparison withexperimental data of accelerators
Proc. of International Topical Meeting on
Nuclear Research Applications and Utilizationof Accelerators (CD-ROM), 9 (2009)
C-203
Takei, H. et al.
Research and development programme on
ADS in JAEA
Proc. of International Topical Meeting on
Nuclear Research Applications and Utilizationof Accelerators (CD-ROM), 11 (2009)
C-204
Kiyanagi, Y.
Nuclear data measurements on the neutronnucleus reaction instrument (NNRI) at thematerials and life science facility (MLF) at
J-PARC
Proc. WONDER2009, 9 (2009)
C-205
Sasa, T. et al.
Shielding analysis of the secondary coolant
circuit of accelerator driven systems
Steam Generator Systems; Operational
Reliability and Efficiency, 393 (2011)

Publications     J-PARC Annual Report 201090

JAEA Reports
J-001
Fujiwara, S. et al.
Analysis of F-actin dynamics
JAEA-Review 2008-067, 289 (2008)
J-002
Nakajima, K. et al.
Proceedings of the Workshop on “Possible
Scientific View from New Neutron Spectroscopy Opportunities in J-PARC”

JAEA-Review 2010-027 (2010)
J-003
Kajimoto, R. et al.
Proceedings of the Workshops on “JAEA Project Researches at J-PARC/MLF”
JAEA-Review 2011-014 (2011)

Noise Evaluation of a MOSFET for an ASIC
JAEA-Technology 2010-030 (2010)
J-005
Inamura, Y. et al.
Technical Report on the Korea-Japan Software Collaboration
JAEA-Technology 2010-047 (2010)

J-004
Yamagishi, H. et al.

KEK Report
K-001
Sagehashi, H.
T0 チョッパー制御 ・ 計測システムの開発
KEK Internal 2010-2 (2010)
K-002
Mihara S.
Muon physics programs at J-PARC
KEK Preprint (2010)
K-003
Itoh, S. et al.
8th Meeting on Advanced Pulsed-Neutron
Research on Quantum Functions in NanoScale Materials, April 9-10, 2009, KEK,
Tsukuba, JapanKEK Proceedings 2009-2 (2009)

K-008
Suzuki, H. et al.
J-PARC ニュートリノ超伝導ビームライン用低温
設備 制御情報の発信

送

KEK Proceedings 2009-13, 2-010 (2010)

KEK Proceedings 2009-13, 5-006 (2010)

K-009
Araoka, O. et al.

K-016
Kawai, M. et al.
The 9th Workshop on Materials Science andTechnology for Spallation Neutron Sourse,
11-12 March 2008, JAEA Tokai, Ibaraki, Japan.
(CD-ROM)KEK Proceedings 2010-1 (2010)

Ｊ－ＰＡＲＣニュートリノ超伝導ビームライン用低温設備の高圧ガス

KEK Proceedings 2009-13, 2-011 (2010)
K-010
Iida, M.
J-PARC ヘリウムガス回収設備の建設及び液化
ヘリウム供給体制の構築

KEK Proceedings 2009-13, 2-012 (2010)

K-004
Yokoo, T. et al.

K-011
Sato, S. et al.

学術創成研究 「パルス中性子源を活用した量
子機能発現機構に関する融合研究」 第 8 回研究会

ネットワークを使用した、 中性子計測システムの
開発

K-006
Sagehashi, H.
T0 チョッパーの開発 （制御）KEK Proceedings 2009-11, 38 (2009)

K-012
Kobayashi, Y. et al.
J-PARC 物質 ・ 生命科学実験施設内実験装置のPPS ・ MPS について
KEK Proceedings 2009-13, 3-014 (2010)

K-013
Makimura, S. et al.
J-PARC におけるミュオン生成回転標的の開発
KEK Proceedings 2009-13, 4-001 (2010)
K-014
Hirose, E.
J-PARC ハドロン実験施設における耐放射線電

K-007
Ohata, H. et al.
J-PARC 超伝導ビームライン用低温設備の設計、

磁石システム建設、 性能試験

KEK Proceedings 2009-13, 4-002 (2010)

KEK Proceedings 2009-13, 2-009 (2010)

K-017
Kawai, M. et al.
The 10th Workshop on Materials and Scienceand Technology for Spallation Neutron
Sourse, 14-15 December 2009, IBARAKI
Quantum Beam Research Center,Ibaraki,
Japan. (CD-ROM Only)
KEK Proceedings 2010-2 (2010)

KEK Proceedings 2009-13, 3-008 (2010)

KEK proceedings 2009-3 (2009)
K-005
J-PARC MuSAC Documentation
Presentations for the 7th Muon Science
Experimental Facility Advisory Committee
Meeting (MuSAC)
KEK Proceedings 2009-7 (2009)

K-015
Yashiro, S.
JPARC 実験データの共通計算機システムへの転K-018
MuSAC J-PARC MuSAC Documentation
Presentations for the Muon Science Advisory(and the 8th Muon ScienceExperimental
Facility Advisory Committee)
KEK Proceedings 2010-3 (2010)
K-019
Kawai M. et al.
The 11th Workshop on Materials science andTechnology for Spallation Neutron Source,
15-16 December 2010, IBARAKI Quantum
Beam Research Center, Ibaraki, Japan.
KEK Proceedings 2010-12 (2010)
K-020
Yokoo, T. et al.
Gas Desorption Examination of B4C Resin
KEK Report 2009-4 (2009)

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Japan Atomic Energy Agency
J-PARC Center
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January 2012

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