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<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>===============================================================<br>
J-PARC Project Newsletter<br>
No.36, April 2009<br>
<br>
Japan Proton Accelerator Research Complex under construction<br>
jointly by the High Energy Accelerator Research Organization (KEK) and<br>
the Japan Atomic Energy Agency (JAEA)<br>
<span class=MsoHyperlink>http://j-parc.jp/index-e.html</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
<br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>===============================================================<br>
<br>
HEADLINES AND CONTENTS<br>
<br>
1. [Overview]<br>
<br>
NEW FISCAL YEAR STARTED<br>
<br>
IAC, A-TAC, N-TAC, MUSAC, 50 GEV PAC HELD FROM FEBRUARY<br>
TO MARCH<br>
<br>
GRAND DESIGN FOR J-PARC<br>
<br>
INAUGURATION FOR J-PARC<br>
<br>
2. [Accelerator Division]<br>
<br>
EXTRACTION OF 30 GEV PROTON BEAM TO HADRON BEAM DUMP<br>
<br>
3. [Nuclear and Particle Physics Division]<br>
<br>
THE FIRST BEAM EXTRACTED TO THE HADRON HALL AND THE<br>
"FIRST-BEAM WORKSHOP AT THE J-PARC HADRON EXPERIMENTAL<br>
HALL"<br>
<br>
CONSTRUCTION OF THE NEUTRINO FACILITY<br>
<br>
THE FIRST PRODUCTION OF NEUTRINOS<br>
<br>
4. [Materials and Life Science Division]<br>
<br>
THE FIRST USER PROGRAM HAS BEEN CONDUCTED WITH A STABLE<br>
OPERATION OF THE TARGET STATION FOR ABOUT 25 DAYS IN A<br>
PERIOD FROM DEC. 23, 2008 TO FEB. 27, 2009.<br>
<br>
THE PROPOSALS FOR THE USER PROGRAM IN THE FIRST<br>
HALF OF 2009 WERE REVIEWED BY PROGRAM REVIEW COMMITTEES<br>
OF NEUTRON AND MUON IN FEB. 2009<br>
<br>
5. [Nuclear Transmutation Section]<br>
<br>
THE ENDURANCE OF AUSTENITIC STAINLESS STEEL<br>
<br>
6. [Safety Division]<br>
<br>
THE SAFETY INSPECTION OF NEUTRINO EXPERIMENTAL FACILITY<br>
SUCCESSFULLY CONDUCTED BY NUSTEC<br>
<br>
7. [Information System Division]<br>
<br>
NEW SERVICES FOR J-PARC USERS HAVE STARTED<br>
<br>
8. [Announcement of Symposia and Meetings]<br>
<br>
9. [Editorial Note]</span><span lang=EN-US style='font-size:10.0pt;font-family:
"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
1. [Overview] by Shoji NAGAMIYA<br>
-----------------------------------------------------------<br>
<br>
NEW FISCAL YEAR STARTED<br>
<br>
The new fiscal year started on April 1. This
year is a special year<br>
for us, since the Phase 1 Project of the entire J-PARC was completed<br>
at the end of the previous fiscal year. In other words, the construction<br>
of the neutrino facility was completed.<br>
<br>
Facing a new phase of operation, though we are still
struggling with<br>
many accelerator elements to complete, the headquarter members<br>
have been changed in the following way.<br>
<br>
J-PARC Director: Shoji NAGAMIYA (unchanged)<br>
J-PARC Deputy Director for KEK: Hitoshi KOBAYASHI<br>
J-PARC Deputy Director for JAEA: Yujiro IKEDA<br>
<br>
Namely, both Yoshishige YAMAZAKI (for KEK Deputy) and<br>
Yukio OYAMA (for JAEA Deputy) have stepped down from their positions.<br>
I would like to send my greatest thanks to these two.<br>
<br>
The financial situation for this year will be as
follows.<br>
For the operational fund we shall have about 60 Oku Yen for JAEA and<br>
65 Oku Yen for KEK. This will let us run for 110 days for the users<br>
program. In addition, 43 Oku Yen was approved for the energy recovery </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>of the Linac
(to 400 MeV), 5 Oku Yen for two additional neutron beam </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>lines
(first year of the 3 years) and 5 Oku Yen for the K=1.1 beamline </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>for the
hadron facility. An additional fund at the Government level is </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>under
discussion.<br>
<br>
IAC, A-TAC, N-TAC, MUSAC, 50GEV PAC HELD FROM FEBRUARY </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>TO MARCH<br>
<br>
From the end of February to the beginning of March,
many review<br>
committees were held, anticipating the fact the IAC (International<br>
Advisory Committee) was held on March 9 and 10. This time, although<br>
all the committees congratulated the success of the J-PARC, the </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>main
issue was to warrant the stability of the accelerator, since we </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>are
facing many problems in RFQ, RF System, the Power Station, etc.<br>
The IAC Report as well as other reports are about to be finalized.<br>
<br>
GRAND DESIGN FOR J-PARC<br>
<br>
The J-PARC Grand Design after the completion of Phase
1 is now<br>
being published, although the final draft is still under discussion by the<br>
communities. Professor Taku YAMANAKA at Osaka University is the<br>
chair of this committee and presented their work at the IAC meeting<br>
on March 10.<br>
According to this report, the plan was separated into
three phases,<br>
the first 5 years, the second 5 years and beyond. The first 5 year<br>
plan includes: 1) intensity growth of the main ring accelerator primarily<br>
for neutrinos, 2) completion of the hadron beamlines which are not yet<br>
fabricated, 3) construction of muon beamlines including ultra soft muon<br>
beamline, etc. The detailed report is still under discussion and will be<br>
published soon.<br>
<br>
INAUGURATION FOR J-PARC<br>
<br>
The J-PARC Inauguration Ceremony will be scheduled for
July 6.<br>
We invite all the related persons, including major people, foreign guests,<br>
industries that contributed to us, and our participants. The total<br>
number of guests will be over 1,000. If you are interested in joining<br>
this inauguration, please write me directly.<br>
<br>
-----------------------------------------------------------<br>
2. [Accelerator Division] by Ainosuke ANDO<br>
-----------------------------------------------------------<br>
<br>
EXTRACTION OF 30 GEV PROTON BEAM TO HADRON BEAM DUMP<br>
<br>
The 30 GeV proton beam in MR (50 GeV Synchrotron) was
extracted<br>
by the third order resonance (3Qx =67, Qx: horizontal tune of betatron<br>
oscillation) to the Hadron beam dump at 19:35, Jan. 25, 2009. This is<br>
the first trial of slow extraction before using the beam de-bunching<br>
techniques to obtain coasting beam and the beam spill feedback which<br>
will be installed this summer. Because the current stability of<br>
the power supplies of main magnets was (1.0 ~ 3.0)E-4, the beam<br>
extracted suddenly when Qx reached near 67/3 due to the tune ripple<br>
caused by the current ripples. The improvement toward the current<br>
stability in ppm order is essential for real slow extraction. The<br>
extraction efficiency was roughly estimated as 90 %. The beam loss<br>
monitors were calibrated by scraping the beam with the local bump near<br>
the extraction septa. The output voltage is almost linear to the<br>
number of the lost protons. Taking into account the residual radiation<br>
level measured after the beam operation, the guideline that the beam<br>
loss at local area must be less than 20 W to keep the residual<br>
radiation level less than 1 mSv/h for the safe maintenance are well<br>
confirmed. The loss information gave the extraction efficiency as<br>
about 90 %, which was confirmed by the comparison with the beam<br>
current monitor in the Hadron beam line.<br>
After almost continuous operation for more than one
year,<br>
the many troubles exposed the fragile elements of the accelerator<br>
systems. The most serious problems are the discharge of the RFQ<br>
(Radio Frequency Quadrupole linac), buckling or stress deformation<br>
of MA (magnetic alloy) cores for the RF cavities of RCS (3 GeV<br>
Synchrotron) and the breakdown of the IEGT's (Injection Enhanced </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Gate Transistor)
of the power supply for one family of MR quadrupole </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>magnets.<br>
The RFQ problem, which was already reported in the
previous </span><span lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>letter,
limited not only the beam power but also the schedule in the </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>beam
operation since last September. The backup machine is now in </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>design
and will be ordered to companies for construction. The </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>installation
of this new RFQ is planned to be done in the summer, </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>2010,
the conditioning of the present RFQ has been carefully and </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>frequently
performed to provide beams for the 20 kW RCS output at </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>least
until the installation of the backup.<br>
The IEGT breakdown is caused by the surge voltage
higher than<br>
4.5 kV at the turn-off timing of not only the corresponding IEGT but<br>
also the others. This should be overcome by the improvement of the<br>
installed protection circuit (the work will take more than one month),<br>
and solutions are not clearly found at present, so that </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>phenomenological
treatments have been tried such as the change of </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>pulse
width of the gate and the reduction of the primary line voltage. </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Some of
them seem effective before the improvement of the </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>protection
circuit, which is scheduled for this summer.<br>
The routine work of impedance monitoring found the
significant<br>
reduction at the tank #6 in the seventh cavity of RCS. The stress<br>
deformation was supposed from the R&D experience and then the<br>
cavity was dismantled. The deformations at the center were found in<br>
twelve cores out of the total eighteen. There is no way to release<br>
stresses due to thermal cycle because cores are made by winding.<br>
Fortunately the trouble of only one core resulted in the impedance<br>
reduction, which was replaced with a spare. The essential </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>improvements
such as introducing radial cut, new inventions in </span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>winding
process, or material selection of molding are now in discussion. </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>For the
moment spares will be prepared because the present cores </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>are
treated as consumables. If a significant impedance reduction is </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>found
and the gap short operation for the corresponding tank is not </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>allowable
to keep the enough acceleration voltage, the cores will be </span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>replaced.<br>
<br>
The budget for the energy upgrade to 400 MeV of linac
was<br>
approved by the end of fiscal year 2008. The ACS (Annular Coupling<br>
Structure) linac has been in R&D phase for these several years, and<br>
there is almost no fatal problem in technology. But it is very tight in<br>
cost and schedule. Anyway a new linac will be installed at the summer,<br>
2012 at the latest.<br>
<br>
The eighth A-TAC (Accelerator Technological Advisory
Committee)<br>
was held from 5th to 7th in this March. There were many encouraging<br>
comments especially about the cure of the present RFQ and the ACS<br>
linac.</span><span lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
3. [Nuclear and Particle Physics Division]<br>
by Shinya SAWADA, Toshifumi TSUKAMOTO<br>
-----------------------------------------------------------<br>
<br>
THE FIRST BEAM EXTRACTED TO THE HADRON HALL AND THE <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>"FIRST-BEAM
WORKSHOP AT THE J-PARC HADRON <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>EXPERIMENTAL
HALL" (by Shinya SAWADA)<br>
<br>
As was announced by a press release and was also
informed by<br>
a Special Issue of the Newsletter, the first proton beam was<br>
successfully accelerated to 30 GeV in the 50 GeV synchrotron<br>
(MR), extracted, and transported to the beam dump of the Hadron<br>
Hall on January 27th. On that day, both the accelerator and the<br>
hadron teams started an attempt to slow-extract a proton beam<br>
for the first time, and only after a few hours of the effort,<br>
a proton beam was successfully observed at the beam dump with<br>
a monitor at 19:35. After a scheduled maintenance of the accelerator,<br>
on February 10th, the production target, T1, was inserted into the<br>
proton beam to produce secondary beams. The first secondary<br>
beam was observed by the E15/E17 experiment team, headed by<br>
Prof. Ryugo HAYANO (Tokyo) and Prof. Masahiko IWASAKI (RIKEN),<br>
at the K1.8BR beamline.<br>
<br>
The "First-Beam Workshop at the J-PARC Hadron
Experimental<br>
Hall" was held at the Ibaraki Quantum Beam Research Center, <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>located
just next to the J-PARC site, on March 25th and 26th. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>About
100 researchers attended the meeting. They discussed reports <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>on the
first beam from the accelerator team, the hadron beamline<br>
team, and the E15/E17 team, as well as the reports by the<br>
experimental groups who expect to use the beams in this fall at<br>
the K1.8 beamline and the KL beamline. In addition, they were<br>
encouraged by the talks from noted theorists, Prof. Tetsuo HATSUDA<br>
and Prof. Yasuhiro OKADA, hearing physics opportunities in the<br>
Hadron Hall. In the afternoon of March 26th, a tour<br>
to the Hadron Hall and a general assembly of the Hadron Hall<br>
Users Association (HUA) also took place.<br>
<br>
We are very much excited on the beginning of the new
era with<br>
the Hadron Hall.<br>
<br>
CONSTRUCTION OF THE NEUTRINO FACILITY<br>
(by Toshifumi TSUKAMOTO)<br>
<br>
Installation of components in the neutrino beam line
is finished.<br>
Many tests and inspections are being carried out for the<span style='color:
#1F497D'> </span>neutrino <span style='color:#1F497D'><o:p></o:p></span></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>beam
commissioning in April and May.<br>
The superconducting magnet system is being tested from
January <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>and the
main magnet tests such as 48 hours operation with 30 GeV <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>nominal
operation current 4400A and excitation test up to 5000A were <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>successfully
completed. Inspection of the cryogenic system by the <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>local
government was done in March and the system is officially <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>approved.<br>
The most downstream part of neutrino beam line
including<br>
the pit of BD (Beam Dump) and MUMON (Muon Monitor) was <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>completed
in March, and then the government inspection of TS <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>(Target
Station) and NU3 for radiation shield, interlock (Personal <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Protection
System) and water/air discharge equipment was carried <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>out and
it passed successfully.<br>
The first horn excitation test was performed
successfully after<br>
installation. The second and third horn will be installed after the first<br>
neutrino beam commissioning in April and May.<br>
The first module of the on-axis neutrino detector
(INGRID) was<br>
Installed in NM (Neutrino Monitor building) and the INGRID DAQ (Data<br>
Acquisition) system is being carried out with connection to the neutrino<br>
beam line control/DAQ system which gives beam information to <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>INGRID
DAQ system.<br>
The neutrino beam commissioning in April and May aims at<br>
the transportation of proton beam to the target and measurement<br>
of muons from decay pions produced at the target.<br>
<br>
THE FIRST PRODUCTION OF NEUTRINOS<br>
<br>
As was already informed by a special issue of the
newsletter, on <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>April
23, 2009, <span style='color:#1F497D'>during editing this newsletter, </span>the
first beam commissioning <span style='color:#1F497D'><o:p></o:p></span></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>of the
neutrino beam line was started. At 19:09(JST), the first neutrino <span
style='color:#1F497D'><o:p></o:p></span></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>beam
production is confirmed by observing muons by a muon monitor <span
style='color:#1F497D'><o:p></o:p></span></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>system
installed at the most downstream of the neutrino beam line of <span
style='color:#1F497D'><o:p></o:p></span></span></p>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>J-PARC.<span
style='color:#1F497D'><o:p></o:p></span></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
4. [Materials and Life Science Division] by Yujiro IKEDA<br>
-----------------------------------------------------------<br>
<br>
THE FIRST USER PROGRAM HAS BEEN CONDUCTED WITH A<br>
STABLE OPERATION OF THE TARGET STATION FOR ABOUT<br>
25 DAYS IN A PERIOD FROM DEC.23, 2008 TO FEB 27, 2009.<br>
<br>
THE PROPOSALS FOR THE USER PROGRAM IN THE<br>
FIRST HALF OF 2009 WERE REVIEWED BY PROGRAM REVIEW<br>
COMMITTEES OF NEUTRON AND MUON IN FEB. 2009.<br>
<br>
1. Neutron Source and Proton Beam Transport<br>
The proton beam transport line, mercury target and
ancillary<br>
systems had been stably operated for MLF user programs, except<br>
for the hydrogen pump to supply super critical hydrogen into the<br>
moderators. At the end of the Run in January, the hydrogen pumps <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>have
exhibited the problems: that is, unexpected vibrations at rotors of<br>
the pumps were observed. Reason of the vibration is under <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>investigation.
Neutronic performance data, i.e., spectrum, intensity and <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>pulse
shapes, have been measured for the three types of moderators. <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>The
measured data agreed well with design values with suggesting <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>adequacy
of neutronics design of JSNS. A cutting machine for irradiated <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>components
was moved from the hot cell to the cold area in order to <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>perform
cold tests for its future modification. As for R&D on pressure <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>wave
mitigation technology, SNS team visited to carry out the off-beam <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>cavitation
damage tests by using MIMTM mercury loop.<br>
<br>
2. Neutron Science<br>
User's program and commissioning were carried out
under the<br>
beam power of about 20 kW in February, at the 11 instruments of<br>
4SEASONS (BL01), iBIX (BL03), NNRI (BL04), NOP (BL05),<br>
S-HRPD (BL08), NOBORU (BL10), HRC (BL12), H-REF (BL16),<br>
TAKUMI (BL19), iMATERIA (BL20), and NOVA (BL21).<br>
Full-scale construction of Biomolecular Dynamics
Spectrometer,<br>
DNA (BL02) and Smaller-Angle Scattering Instrument, TAIKAN (BL15)<br>
renamed from HI-SANS was approved. Neutron guide tubes to be<br>
installed in their biological shields have been already fabricated. The <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>high-pressure
neutron diffractometer was decided to be constructed<br>
at the BL11 installed on a decoupled moderator.<br>
The International Workshop on Nanostructural Analysis
with <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Wide-q
Data was held in January 27, 2009 in Tokai for discussing <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>analysis
technique of wide-q data to be obtained by TAIKAN. The <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>International
Advisory Committee on the Smaller-Angle Neutron <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Scattering
Instrument of J-PARC was held in January 28-29, 2009 <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>in Tokai
for reviewing the project of TAIKAN.<br>
The 7th Neutron Technical Advisory Committee (N-TAC-7)
was<br>
held in March 5-6, 2009 in Tokai. Current status of the development<br>
of neutron instruments and devices, management of experimental <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>halls,
system for user support, international activities and <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>collaborations,
and future plans were presented by members of MLF <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>and then
reviewed by the committee. The committee reported <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>valuable
recommendations such as an increase of staff to be <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>consistent
with international best practice.<br>
<br>
3. Neutron Optics and beam control<br>
A new photon-counting two-dimensional detector system
using<br>
scintillator sheets and wavelength-shifting (WLS) fiber arrays has<br>
been delivered for a single-crystal neutron diffractometer for<br>
biological and chemical crystallography named "iBIX".<br>
An ENGIN-X-type linear scintillation neutron detector system has<br>
been fabricated for the engineering materials diffractometer
"TAKUMI".<br>
<br>
4. Muon Science<br>
In January, 2009, a new cabin which is equipped with
two sets of <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>DAQ
electronics systems and user's desks was constructed forrunning <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>the
user's programs. And in the end of January, there started several<br>
user's programs. The Saitama-University /JAEA group identified an<br>
anti-ferromagnetic state below 20K in the (BEDT-TTF)2 IBrCl<br>
compound, an organic superconductor. The KEK group obtained <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>results
on Iron-Oxypnictide Superconductors and the Toyota group <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>obtained
new results on lithium diffusion.<br>
<br>
Muon Science Advisory Committee (MUSAC VII) was held at <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>TOKAI on
March 6 and 7th 2009 just as the first muon beam user <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>period
was ending successfully. The main overall recommendation was <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>that
Ultra Slow Muon beams is the future for this facility and the group<br>
should position itself to take advantage of new funding opportunities<br>
being pursued by users while maintaining a strong scientific vision.<br>
<br>
The Program Review Committees of both neutron and muon
user<br>
programs were held to select proposals to be allocated with beam time<br>
in the campaign of the first half in 2009 JFY. About 50 proposals were<br>
accepted to be performed in MLF.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
5. [Nuclear Transmutation Section] by Kenji KIKUCHI<br>
-----------------------------------------------------------<br>
<br>
THE ENDURANCE OF AUSTENITIC STAINLESS STEEL<br>
<br>
High-energy proton irradiation effect on mechanical strength
of<br>
austenitic stainless steel has been investigated at Tokai hot laboratory<br>
facilities under the research frame of STIP/PSI program. Hardening and<br>
reduction of ductility were saturated around 10 dpa/800appmHe, and<br>
maintained almost the same property by 19 dpa/1600appmHe. Fracture <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>surface
showed ductile manner in those specimens but not intergranular <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>feature.
Tiny bubbles with a size of 2-3nm existed homogeneously as <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>well as
dislocation density was not clearly changed in the materials.<br>
There is no data over 19dpa currently.<br>
<br>
-----------------------------------------------------------<br>
6. [Safety Division]<br>
by Minoru TAKASAKI, Taichi MIURA and Hiroshi NAKASHIMA<br>
-----------------------------------------------------------<br>
<br>
THE SAFETY INSPECTION OF NEUTRINO EXPERIMENTAL FACILITY<br>
SUCCESSFULLY CONDUCTED BY NUSTEC<br>
<br>
The inspection of the Neutrino Experimental Facility
before the<br>
operation was conducted on March 27, 2009, by the Nuclear Safety<br>
Technology Center (NUSTEC): the inspection items were working<br>
conditions of emergency and interlock signals, shielding structures<br>
and radiation signs posted around the radiation controlled areas. This<br>
was the last facility in J-PARC to get the inspection for the beam<br>
operation. In this inspection, the fast extraction part of 50 GeV<br>
proton synchrotron (MR) ring and the arc line for the superconducting<br>
magnets were included. The designed energy and power were 30 GeV<br>
and 1.2kW, respectively. The first beam to the Neutrino Facility is<br>
expected to be in the beginning of April for the test operation and<br>
the next inspection during the operation with the beam intensity of<br>
about 10 to 20 % of the design value is scheduled to be in the<br>
second half of May.<br>
On January 13, shielding structures of Nuclear and
Particle Physics<br>
Facility (HD) were inspected by NUSTEC: other items of this facility<br>
were inspected on December 1, 2008. Also, the secondary beam lines<br>
of the Materials and Life Science Facility (MLF) were inspected to<br>
check shielding structures and interlocks. After the testing operation of<br>
these facilities, the inspections during operation of HD, MR, and MLF<br>
were conducted successfully on February 19 with about 10% beam<br>
operation of the design values.<br>
The 6th Radiation Safety Committee of J-PARC (the 12th
Safety<br>
Deliberative Committee on Radiation Safety of J-PARC) met on March<br>
26, 2009, to discuss following items: (1) completion reports of J-PARC<br>
facilities; (2) the internal rules radiation protection of J-PARC and<br>
its details; (3) the report from Expert Committee of J-PARC on the<br>
Interlock System. The seminar for the J-PARC safety and health was <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>held on
February 26 with 191 participants. Other staff who missed the <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>seminar
watched the video program. The J-PARC Center Safety and <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Health
Committee met on March 17.<br>
An educational video about the general safety for
workers from<br>
companies was completed: the video for experimental users is in the<br>
process of production according to the video for workers. In the next<br>
step, the English version is under consideration.<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
7. [Information Sytem Division] by Atsushi MANABE<br>
-----------------------------------------------------------<br>
<br>
NEW SERVICES FOR J-PARC USERS HAVE STARTED<br>
<br>
Guest network is a wireless LAN service for short-term
visitors<br>
available in almost all J-PARC buildings since last fall. Soon after their<br>
arrival at J-PARC, visitors can connect to internet without any prior<br>
registration.<br>
Users Office plans to have a one-stop Web portal site where
users can<br>
do almost all required registration and application procedure on line.<br>
As a first step, 'Proposal submission system' (<span class=MsoHyperlink>https://gamusha1.j-parc.jp/</span>)<br>
and 'User support system' (<span class=MsoHyperlink>https://mercury.j-parc.jp/usjparc/</span>)
were<br>
started since last May and December.<br>
Proposal submission system gives public advertisements of
J-PARC<br>
experiments and accepts those proposal submissions. In User support<br>
system, users can do registrations, applications and reservations needed<br>
to stay and carry out experiments in J-PARC. As the next step, Proposal<br>
Review System to review submitted proposals is under development.</span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'> <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
8. [Announcement of Symposia and Meetings]<br>
-----------------------------------------------------------<br>
<br>
The J-PARC Ceremony for the completion of the project, July 6 in <o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'>Tokyo<o:p></o:p></span></p>
</div>
<div>
<p class=MsoNormal><span lang=EN-US style='font-family:"MS UI Gothic"'><br>
-----------------------------------------------------------<br>
9. [Editorial Note]<br>
-----------------------------------------------------------<br>
In case you do not wish to receive this Newsletter in the future,<br>
please send an email to <span class=MsoHyperlink>news-l-ctl@ml.j-parc.jp</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>and simply write one
sentence in the body of the message as<br>
unsubscribe<br>
If you wish to receive, write one sentence in the body of the<br>
message as<br>
subscribe<br>
You can get a help with a sentence of "help" in the body.<br>
Information on the project can be also obtained at the Web site:<br>
<span class=MsoHyperlink>http://j-parc.jp/index-e.html</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
<br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br>
Editorial Board:<br>
Masatoshi ARAI (chair): <span class=MsoHyperlink>masatoshi.arai@j-parc.jp</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>Yujiro IKEDA: <span
class=MsoHyperlink>ikeda.yujiro@jaea.go.jp</span></span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>Nobuo OUCHI: <span
class=MsoHyperlink>ouchi.nobuo@jaea.go.jp</span></span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>Shinya SAWADA: <span
class=MsoHyperlink>shinya.sawada@kek.jp</span></span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>Toshifumi TSUKAMOTO:
<span class=MsoHyperlink>toshifumi.tsukamoto@kek.jp</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>English Editor: Dick
MISCHKE <span class=MsoHyperlink>mischke@triumf.ca</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>Secretary: Chikako
KAIBARA <span class=MsoHyperlink>kaibara.chikako@jaea.go.jp</span></span><span
lang=EN-US style='font-size:10.0pt;font-family:"MS UI Gothic"'><br>
</span><span lang=EN-US style='font-family:"MS UI Gothic"'>++++++++++++++++End
of Letter+++++++++++++++++++++++++++++++</span><span lang=EN-US
style='font-size:10.0pt;font-family:"MS UI Gothic"'><o:p></o:p></span></p>
</div>
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