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<DIV><FONT face="MS UI Gothic"
size=2>===============================================================<BR>
J-PARC Project
Newsletter
<BR>
No. 39, March 2010<BR>Japan Proton Accelerator Research Complex under
operation jointly <BR>by the High Energy Accelerator Research Organization (KEK)
and<BR>the Japan Atomic Energy Agency (JAEA)<BR><A
href="http://j-parc.jp/index-e.html">http://j-parc.jp/index-e.html</A></FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic"
size=2>===============================================================</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>HEADLINES AND CONTENTS</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>1. [Overview]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>3 GeV RING MARKED 300 kW.<BR>BUDGET
DECIDED AT THE GOVERNMENT.<BR>NEW IAC MEMBERS WERE APPOINTED.<BR>THE NUMBER OF
USERS INCREASES STEADILY.<BR>J-PARC APPEARS ON SAZAE-SAN COMIC MOVIE ON
TV.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>2. [Accelerator Division]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>SUCCESS IN 300 kW TEST OPERATION OF
RCS.<BR>120 kW OPERATION FOR MLF USER PROGRAM.<BR>HIGH POWER TEST OF
MR.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>3. [Nuclear and Particle Physics
Division]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>SECONDARY BEAM COMMISSIONING
STARTED.<BR>9TH PAC MEETING HELD ON JANUARY 15-17.<BR>STATUS OF THE NEUTRINO
FACILITY.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>4. [Materials and Life Science
Division]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>THE WORLD STRONGEST NEUTRON PULSE WAS
PRODUCED.<BR>THE USER OPERATION FOR 2008B PERIOD HAS BEEN STARTED.<BR>THE WORLD
STRONGEST PULSED MUON BEAM WAS ACHIEVED AT <BR>J-PARC MUSE ON THE NOVEMBER, 2009
BEAM CYCLE.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>5. [Exotic Nuclear Science
Group]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>A COMPACT TWO-GAP PRE-BUNCHER WAS NEWLY
INSTALLED <BR>UPSTREAM OF THE LINAC OF THE TOKAI RADIOACTIVE ION <BR>ACCELERATOR
COMPLEX (TRIAC) FOR NUCLEAR ASTROPHYSICS <BR>EXPERIMENTS.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>6. [Nuclear Transmutation
Section]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>INTERNATIONAL ADS WORKSHOP WAS
ORGANIZED</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>7. [Safety Division]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>THE SAFETY INSPECTION OF THE HADRON
EXPERIMENTAL FACILITY <BR>SUCCESSFULLY CONDUCTED BY NUSTEC.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>8. [Information System
Division]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>HIGH SPEED NETWORK SINET SUPPORTS J-PARC
EXPERIMENTS</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>9. [Announcement of Symposia and
Meetings]</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face="MS UI Gothic" size=2>10. [Editorial Note]</FONT></DIV>
<DIV><FONT face="MS UI Gothic" size=2> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>1.
[Overview] by Shoji
NAGAMIYA<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> 3 GeV RING MARKED 300 kW</DIV>
<DIV> </DIV>
<DIV> In November we reached 120 kW, as announced in the
<BR>previous Newsletter. Subsequently in December of 2009 the <BR>acceleration
of 300 kW was successfully achieved for one <BR>hour. This implies that beam
intensity per pulse reached <BR>for a short time the highest in the world, since
pulse <BR>interval is longer at J-PARC than at SNS. Currently, we <BR>returned
back to a standard 120 kW operation and it <BR>has been very stable. The run is
very smooth during the <BR>past three months. Please note that the power at
KEK-Booster <BR>ring was 3 kW. We thus obtained 40 times the intensity as
<BR>compared to the KEK-Booster ring, though we are still <BR>very far from the
goal of 1 MW power.</DIV>
<DIV> </DIV>
<DIV> BUDGET DECIDED AT THE GOVERNMENT</DIV>
<DIV> </DIV>
<DIV> At the end of December and at the beginning of
January <BR>a new budget for JFY2010 was announced. We were allowed to <BR>run 6
Cycles (10 Cycles is the maximum). As compared with <BR>the goal for a budget at
full intensity and full beam time, <BR>the allocation of the operation budget in
JFY2010 is 71 % <BR>of this full amount. Namely, the total operation budget
<BR>that will be granted is 67.7 Oku Yen for KEK and 65.3 Oku <BR>Yen for JAEA.
In addition, the Linac Upgrade and neutron <BR>beamlines were approved at JAEA
(total of 25.0 Oku Yen for <BR>JFY2010 plus JFY2009 Supplemental). You may know
that the <BR>government revitalization unit in the new cabinet tried to <BR>make
a large cut in the science budget for JFY2010. However, <BR>the actual cut was
not very dramatic. Our J-PARC received <BR>even an increased operational budget
as compared to the <BR>corresponding one in the previous year.</DIV>
<DIV> </DIV>
<DIV> NEW IAC MEMBERS WERE APPOINTED</DIV>
<DIV> </DIV>
<DIV> From the spring of 2010 members of IAC, A-TAC,
etc, <BR>were renewed. New International Advisory Committee (IAC) <BR>members
are as follows: J. White (Australian U., Chair for <BR>2010), J.-M.Poutissou
(TRIUMF, Chair after 2011), <BR>A. Taylor (RAL), B. Frois (CEA), S. Henderson
(ORNL), <BR>S. Tanaka (U. Tokyo), H. Fukuyama (Tokyo U. of Science), <BR>I.
Anderson (ORNL)*, S. Bertolucci (CERN)*, Y.-K. Kim (FNAL)*, <BR>H.
Montgomery(JLab)*, T. Roser (BNL)*, H. Stoecker (GSI)*, <BR>E. Torikai (U.
Yamanashi)*, T. Shintake (SPring-8)*, <BR>with an asterisk are new
members.</DIV>
<DIV> </DIV>
<DIV> THE NUMBER OF USERS INCREASES STEADILY</DIV>
<DIV> </DIV>
<DIV> The number of users is steadily increasing. Last
November <BR>the number exceeded 3000 persons*day in a month, which is <BR>about
100 persons/day. Fifty percent are non Japanese (this <BR>is a registered number
at the Users Office so that the number <BR>of visitors could be much more). The
lack of lodging space is <BR>now a big issue. As announced before, KEK is
constructing about <BR>50 lodgings (to start its operation from December of
2010). <BR>Other efforts to increase lodging capability are also in
<BR>progress. The Tokai Village is cooperating to construct a <BR>hotel. This
village is also cooperating with us to construct <BR>an access road which is
directly connected to J-PARC from a <BR>public main road, Rt. 245.</DIV>
<DIV> </DIV>
<DIV> J-PARC APPEARS ON SAZAE-SAN COMIC MOVIE ON TV</DIV>
<DIV> </DIV>
<DIV> Sazae-san is a very popular TV comic. It is
broadcast <BR>at 6:30 pm on every Sunday. In the opening screen of this
<BR>comic, a scene of J-PARC appears (though, only for a very <BR>short time
alone) from January to the end of March.</DIV>
<DIV> </DIV>
<DIV><BR>-------------------------------------------------------------<BR>2.
[Accelerator Division] by Ainosuke
ANDO<BR>-------------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> SUCCESS IN 300 kW TEST OPERATION OF RCS (3-GeV Rapid <BR>Cycling
Synchrotron)</DIV>
<DIV> </DIV>
<DIV> On December 10th, the 300-kW proton beam was
guided to <BR>the Hg-target of MLF (Material and Life science Facility) to
<BR>produce neutron beams for almost one hour. This high power <BR>test was
started at 10:45 because the official permission of <BR>the maximum intensity is
250 kW*hour in every hour. The peak <BR>power is considered as the highest in
the world.</DIV>
<DIV> </DIV>
<DIV> 120 kW OPERATION FOR MLF USER PROGRAM</DIV>
<DIV> </DIV>
<DIV> Since November 10th, the operation at 120 kW has
been <BR>started for the MLF user program. This is the expected <BR>achievement
after the drastic improvement and careful <BR>conditioning of the RFQ linac.
Since there are still some <BR>issues to be solved for the power higher than 120
kW, for <BR>example, beam loss due to multi-passage of the charge <BR>exchange
foil at injection to RCS and the huge energy <BR>deposit on the Hg-target, the
user program of MLF has been <BR>carried out with the 120 kW operation. For the
future an <BR>operation around 200 kW is now under discussion for the MLF
<BR>user programs.</DIV>
<DIV> </DIV>
<DIV> HIGH POWER TEST OF MR (50-GeV Synchrotron)</DIV>
<DIV> </DIV>
<DIV> The MR is now operated with the cycle period of
3.52 <BR>sec and with six bunches (three batches) for the fast <BR>extraction
mode to produce a neutrino beam. In the one-shot <BR>operation mode, 3.1E13
protons per pulse were successfully <BR>extracted to an abort dump. This is
equivalent of 42 kW <BR>beam power if it is operated continuously, and also
<BR>corresponds to 60 kW for the design level of eight bunches <BR>with a period
of 3.3 sec. The dominant beam loss is ~2 % <BR>occurring at collimators during
about 20 ms just after each <BR>batch injection. A simple estimation leads to a
200 W loss <BR>for a 100 kW operation, which is well acceptable for the
<BR>present limit of 400 W. The high power operation has <BR>revealed many
issues. For example, non-negligible beam losses <BR>at regions with a large
momentum dispersion and at components <BR>for injection and extraction and a
large out-gas in the kicker <BR>magnets. The latter one is sensitive to the peak
beam current <BR>and occurs often during acceleration, when the bunch length
<BR>becomes shorter. We admit afresh that observations and controls <BR>of bunch
shapes in both longitudinal and transverse directions <BR>are extremely
essential to realize stable high intensity beams.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>3.
[Nuclear and Particle Physics Division]<BR>by T.TAKAHASHI and J.IMAZATO<BR>by
Y.FUJII, Y.YAMADA and
T.TSUKAMOTO<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> SECONDARY BEAM COMMISSIONING STARTED<BR> (by T.TAKAHASHI and
J.IMAZATO)</DIV>
<DIV> </DIV>
<DIV> Following the first delivery of a secondary beam
in <BR>K1.8BR in the fall of last year, the K1.8 beamline has been
<BR>commissioned during December. This beamline, taken off the <BR>T1 production
target and equipped with two stages of <BR>electro-static separators (ESS),
should deliver separated <BR>K and pi beams up to 2.0 GeV/c. After confirming
good <BR>performance of the beam instruments such as MWPCs and <BR>hodoscopes,
all the beam line elements were started to be <BR>tuned. By switching on the two
ESS high voltages, the <BR>enrichment of K+ to more than 80% content could be
<BR>successfully observed. This was, however, only the first <BR>step toward
full commissioning in the upcoming beam period <BR>this year. During the beam
tuning, the SKS spectrometer, <BR>which had gone through cooling and an
excitation test earlier, <BR>was set in operation, and the basic performance of
tracking <BR>and particle identification was confirmed. Unfortunately, <BR>the
beam intensity of the slow extraction beam was still <BR>weak and the beam spill
structure has not yet been optimized <BR>for carrying out high rate experiments.
The E19 experiment <BR>(pentaquark search) is now being prepared as the first
SKS <BR>experiment. At the same time, the neutral kaon KL beamline, <BR>which is
the K1.8 counterpart of T1, was commissioned and <BR>made progress. For the beam
tuning, efforts have been made <BR>to survey KL and measure its beam profile
using fiber <BR>hodoscopes etc. <BR>KL could be confirmed successfully by the
three-pion decays, <BR>with a yield consistent with expectations from
simulation. <BR>The collimator system, one of the key elements of this
<BR>beamline, was found to function satisfactorily and was <BR>optimized for its
position. These studies were also an <BR>opening act for the following full beam
survey planned this <BR>year, in which neutron backgrounds should be
investigated <BR>in detail towards the E14 KOTO experiment (KL -> p0 nu
nu-bar <BR>rare decay). The K1.8BR beamline, which had been commissioned <BR>and
reported before, turned out to show a sufficiently high <BR>K/pi ratio also in
the subsequent beam study in December, <BR>enough to start the E17 (He-3 kaonic
X-ray) experiment <BR>this year.</DIV>
<DIV> </DIV>
<DIV> 9TH PAC MEETING HELD ON JANUARY 15-17<BR> (by J.IMAZATO)</DIV>
<DIV> </DIV>
<DIV> The 9th PAC meeting was held on January 15-17 at
the <BR>KEK Tsukuba campus. Since half of the committee members come <BR>to the
end of their terms now, new appointed members joined <BR>the meeting this time.
Also, at the occasion of the first <BR>beam delivery to T2K and the Hadron Hall,
the status of <BR>the J-PARC and the accelerator was reviewed. In addition
<BR>to four new experimental proposals, the currently running <BR>experiments
and preparing experiments were reported and <BR>discussed for evaluation. The
results will be published <BR>soon as the meeting minutes.</DIV>
<DIV> </DIV>
<DIV> STATUS OF THE NEUTRINO FACILITY<BR> (by Y.FUJII, Y.YAMADA and
T.TSUKAMOTO)</DIV>
<DIV> </DIV>
<DIV> Based on the first beam experience in May, we
performed <BR>major improvements such as installation of wide-aperture <BR>beam
pipes and semi-remote vacuum equipment, as well as <BR>re-alignment of magnets
during the summer shut-down. With <BR>all those countermeasures, we were ready
for the next beam <BR>by Oct.13. During the second beam period from October to
<BR>December, we carried out beam commissioning with higher-<BR>intensity beam
of typically 20kW. We also tried 50kW-equivalent <BR>beam power operation for a
short time without significant beam <BR>loss. The OTR (Optical Transition
Radiation) monitor <BR>successfully measured the beam profile with a Ti-foil
with 50kW <BR>intensity. These are very encouraging results toward yet higher
<BR>beam intensity. In the winter shut-down, we installed a <BR>collimator to be
prepared for beam power of more than 100kW. <BR>The primary proton beam line is
now ready for the beam.</DIV>
<DIV> </DIV>
<DIV> After the installation of the 2nd and 3rd horns
into the <BR>helium vessel, the vessel was evacuated before filling with
<BR>helium gas. Small vacuum leaks were observed, but were confirmed <BR>to be
no problem for the operation by measuring the oxygen <BR>contamination after
filling with 1500 m3 of helium gas into <BR>the vessel in
November.<BR> Then, the test operation of the horns
started. A small <BR>discharge was observed somewhere in the helium vessel, but
it <BR>could be overcome by modifying the voltage level of the horn
<BR>electrodes. Then, three horns were successfully operated during <BR>the 20
kW beam run in December. In the continuous beam operation <BR>at 20 kW, the
radiation level in the air in the surface building <BR>(NU3) over the beam dump
became not-negligible, and it limited <BR>the beam operation time. Some
air-leaking points from <BR>underground rooms in NU3 were found and are being
closed now <BR>in order to have more continuous beam operation in the
future.</DIV>
<DIV> </DIV>
<DIV> The commissioning and calibration of the on-axis
near <BR>detector INGRID was carried out after the installation in August;
<BR>then it operated for the neutrino beam from November. <BR>Sub-detectors of
the near detector, the P0D (Pi-zero Detector), <BR>the FGD (Fine Grained
Detector), and the DSECAL (Down Stream <BR>Electromagnetic CALorimeter) were
installed in the Basket which <BR>is sitting in the magnet and the off-axis
detector operated for <BR>the neutrino beam also from November. INGRID observed
the <BR>first neutrino event on November 22 and Following this <BR>observation
the off-axis detector also observed a neutrino <BR>event on December 19.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>4.
[Materials and Life Science Division] by Yujiro
IKEDA<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> THE WORLD STRONGEST NEUTRON PULSE WAS PRODUCED</DIV>
<DIV> </DIV>
<DIV> THE USER OPERATION FOR 2008B PERIOD HAS BEEN STARTED</DIV>
<DIV> </DIV>
<DIV> THE WORLD STRONGEST PULSED MUON BEAM WAS ACHIEVED <BR> AT J-PARC
MUSE ON THE NOVEMBER, 2009 BEAM CYCLE</DIV>
<DIV> </DIV>
<DIV> 1. Neutron Source</DIV>
<DIV> </DIV>
<DIV> In the 300 kW high power operation in December
2009, <BR>the world record in pulse neutron intensity among spallation
<BR>neutron sources in the world was achieved probably. <BR>The number of
cold+thermal neutrons below 0.4 eV leaking <BR>from the coupled moderator
surface for each pulse is <BR>estimated to be 5E12 n/sr/pulse. This value
amounts <BR>to a neutron flux of 5E6 n/cm^2/pulse at 10 m from the <BR>moderator
without a neutron guide tube.</DIV>
<DIV> </DIV>
<DIV> International workshop on pulsed spallation
neutron <BR>sources was held on 9th to 12th Nov. 2009 at J-PARC center <BR>and
in parallel the satellite workshop on cavitation damage <BR>mitigation
technology for mercury target on 11th and 12th. <BR>It was a good timing for
SNS/US and JSNS/J-PARC to discuss <BR>on the common issues that they noticed
through experienced <BR>operations, and for the European Spallation Source and
the <BR>China Spallation Neutron Source to learn for their expecting
<BR>facilities.</DIV>
<DIV> </DIV>
<DIV> 2. Neutron Science</DIV>
<DIV> </DIV>
<DIV> User operation for the 2009B period (the second
half <BR>of FY2009) has been started on Dec. 18. 61 accepted general
<BR>proposals for 8 neutron instruments are being carried out <BR>during the
period before the end of March. The High-<BR>Performance Neutron
Reflectometer with a Horizontal Sample <BR>Geometry (BL16) has newly accepted
general users from this <BR>period. 4 instruments are under on-beam
commissioning.</DIV>
<DIV> </DIV>
<DIV> The 120 kW stable operation has inspired both
instrumental <BR>scientists and users. Experiments with small-size samples
and/<BR>or higher resolution experiments, etc., which cannot be carried <BR>out
with 20 kW, have been started. The 120 kW operation also <BR>resulted in
the increase of users from December as well as <BR>the speed-up of commissioning
for the 4 instruments under <BR>commissioning.</DIV>
<DIV> </DIV>
<DIV> A completion ceremony for the High Intensity
Chopper <BR>Spectrometer (4SEASONS, BL01) was held at the MLF on <BR>December
25. The feature, construction process, software <BR>development, and scientific
goal of 4SEASONS were explained <BR>in the ceremony. The ceremony finished with
a group photograph <BR>of about 60 participants stood on the shield of
4SEASONS.</DIV>
<DIV> </DIV>
<DIV> 3. Muon Science</DIV>
<DIV> </DIV>
<DIV> By undergoing the beam tuning at the D2 area, we
were able <BR>to extract, at present, surface muons (positive muons) rate of
<BR>1.7E6/s with use of 120 kW of proton from RCS, which is <BR>calibrated to be
1.5E7/s surface muons when future proton beam <BR>reached at the intensity of
1MW.</DIV>
<DIV> </DIV>
<DIV> Even at the D1 area, we observed 0.3E6/s of the
decayed <BR>positron with use of a collimator with a hole of 40 mm in
<BR>diameter, with use of the 300 kW of proton from RCS, which was
<BR>calibrated to be 1.2E7/s surface muons when future proton beam <BR>reached
at the intensity of 1MW.</DIV>
<DIV> </DIV>
<DIV> These intensities, at the future 1 MW operation,
will <BR>correspond to more than ten times those at the RIKEN/RAL Muon
<BR>facility.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>5.
[Exotic Nuclear Science Group] by Hiroari
MIYATAKE<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> A COMPACT TWO-GAP PRE-BUNCHER WAS NEWLY INSTALLED <BR>UPSTREAM OF THE
LINAC OF THE TOKAI RADIOACTIVE ION <BR>ACCELERATOR COMPLEX (TRIAC) FOR NUCLEAR
ASTROPHYSICS <BR>EXPERIMENTS</DIV>
<DIV> </DIV>
<DIV> A brand-new pseudo saw-tooth wave pre-buncher with
<BR>non-pi mode has been developed and installed downstream of a <BR>beam
chopper. The pre-buncher has two gaps, to which two <BR>rf-waves, being combined
together into the saw-tooth for <BR>beam-bunching, are respectively
applied.</DIV>
<DIV> </DIV>
<DIV> It makes it possible to bunch continuous beams to
2-4 MHz <BR>pulsed beams with a width of less than 38 ns, which corresponds
<BR>to the acceleration frequency of the Split Coaxial RFQ linac <BR>just
downstream the buncher. A typical pulse width of the beam <BR>after acceleration
(1.1 MeV/nucleon) was achieved to have a <BR>2 ns standard deviation at the
target position 10m away from <BR>the exit of TRIAC.</DIV>
<DIV> </DIV>
<DIV> The beam chopper consists of 20 foil-electrodes
with a <BR>2 mm gap stacked vertically to the beam direction. The beam
<BR>particles of out-of-bunch phase are deflected by these <BR>electrodes. The
ratio of pulsed-beam particles to background <BR>ones has been further improved
by the beam chopper from the <BR>order of 10^3 to 10^5 at the target position.
This S/N-ratio <BR>was almost constant, irrespective of the output energies
<BR>ranging from 0.17 to 1.1 MeV/nucleon. As a result, this <BR>system bunched
40% of continuous beam particles, i.e., <BR>bunching gain was found to be
6.53.</DIV>
<DIV> </DIV>
<DIV> The system will be utilized for the measurement of
12C<BR>(alpha, gamma) reaction cross-sections at the stellar energy, <BR>which
is one of important reactions describing element-<BR>synthesis in the evolution
of massive stars. The improved <BR>S/N-ratio is supposed to be good enough for
cross-section <BR>measurements at the 10 pb/sr level.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>6.
[Nuclear Transmutation Section] by Hirofumi
TSUJIMOTO<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> INTERNATIONAL ADS WORKSHOP WAS ORGANIZED</DIV>
<DIV> </DIV>
<DIV> A workshop related to Accelerator-Driven System
(ADS), <BR>"Accelerator-driven Transmutation System for European and <BR>Asian
Young Scientists and Engineers", was held on December <BR>1-4 at Tokai-site of
JAEA in cooperation with J-PARC, <BR>Nuclear Science and Energy Directorate, and
Nuclear <BR>Technology and Education Center. This workshop was organized <BR>as
part of a research cooperation with the IP-EUROTRANS <BR>project and JAEA, and
also as a part of a training <BR>course of the European Nuclear Education
Network (ENEN) with <BR>which the Nuclear Technology and Education Center of
JAEA <BR>has a cooperative relationship. It was opened for young <BR>scientists
in Asian and European countries, and there were 55 <BR>participants including 32
foreign participants from 15 <BR>countries. In the workshop, four lectures for
research <BR>fields related to ADS and research activities for ADS in <BR>Japan,
China, Korea, and Europe were provided. Moreover, 20 <BR>presentations from
young participants were presented, and <BR>important issues for ADS and
international collaborations <BR>were actively discussed. In a technical tour,
the <BR>participants visited MLF and Hadron Hall in J-PARC.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>7.
[Safety Division] by Taichi MIURA and Hiroshi
NAKASHIMA<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> THE SAFETY INSPECTION OF THE HADRON EXPERIMENTAL <BR> FACILITY
SUCCESSFULLY CONDUCTED BY NUSTEC</DIV>
<DIV> </DIV>
<DIV> The inspections of the Hadron Experimental
Facility (HD) <BR>were conducted successfully on December 16, 2009, by the
<BR>Nuclear Safety Technology Center (NUSTEC): the inspection <BR>items were
working conditions of emergency and interlock <BR>signals from secondary beam
lines (K1.8 and KL) and shielding <BR>structures, and were measurements of
ambient doses around <BR>the radiation control areas and at the boundary of the
<BR>J-PARC facility.</DIV>
<DIV> </DIV>
<DIV> The 8th Radiation Safety Committee of J-PARC met
on <BR>December 15, 2009, to discuss the application of HD. The main <BR>change
point is the enlargement of two secondary beam lines <BR>in HD: K1.1BR and
KL.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>8.
[Information Sytem Division] by Atsushi
MANABE<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV> HIGH SPEED NETWORK SINET SUPPORTS J-PARC EXPERIMENTS</DIV>
<DIV> </DIV>
<DIV> The SINET3 information network (<A
href="http://www.sinet.ad.jp/">http://www.sinet.ad.jp/</A>) <BR>has linked the
J-PARC Tokai site and the KEK Tsukuba site <BR>with 1Gbps bandwidth since Oct.
2008. Thanks to the support <BR>of the Japan National Institute of Informatics
(NII) which <BR>manages the SINET network, the link bandwidth was doubled <BR>to
2Gbps just before the 2009 autumn RUN and in JFY2011 it <BR>will be expanded up
to about 10Gbps. J-PARC provides <BR>computing resources of 1600 SPECint06
computing power, <BR>150TBytes RAID disks and 2PBytes tape libraries in the KEK
<BR>Central computer system at the Tokai site. The link speed-up <BR>of the two
sites is expected to enhance the data analysis <BR>for J-PARC experiments.</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>9.
[Announcement of Symposia and
Meetings]<BR>-----------------------------------------------------------</DIV>
<DIV> </DIV>
<DIV>1) NIAC (Neutron International Advisory Committee), Feb.24-26,2010<BR>2)
A-TAC(Accelerator Technology Advisory Committee), Mar.11-13,2010<BR>3)
IAC(International Advisory Committee), Mar.15-17,2010<BR>4) MLF symposium, March
29-31, 2010 in Tokai</DIV>
<DIV> </DIV>
<DIV><BR>-----------------------------------------------------------<BR>10.
[Editorial
Note]<BR>-----------------------------------------------------------<BR>In case
you do not wish to receive this Newsletter in the future,<BR>please send an
email to <A
href="mailto:news-l-ctl@ml.j-parc.jp">news-l-ctl@ml.j-parc.jp</A><BR>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> <A
href="http://j-parc.jp/index-e.html">http://j-parc.jp/index-e.html</A></DIV>
<DIV> </DIV>
<DIV><BR>+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<BR>Editorial
Board:<BR>Masatoshi ARAI (chair): <A
href="mailto:masatoshi.arai@j-parc.jp">masatoshi.arai@j-parc.jp</A><BR>Fujio
MAEKAWA: <A
href="mailto:maekawa.fujio@jaea.go.jp">maekawa.fujio@jaea.go.jp</A><BR>Nobuo
OUCHI: <A
href="mailto:ouchi.nobuo@jaea.go.jp">ouchi.nobuo@jaea.go.jp</A><BR>Shinya
SAWADA: <A
href="mailto:shinya.sawada@kek.jp">shinya.sawada@kek.jp</A><BR>Toshifumi
TSUKAMOTO: <A
href="mailto:toshifumi.tsukamoto@kek.jp">toshifumi.tsukamoto@kek.jp</A><BR>English
Editor: Dick MISCHKE <A
href="mailto:mischke@triumf.ca">mischke@triumf.ca</A><BR>Secretary: Chikako
KAIBARA <A
href="mailto:kaibara.chikako@jaea.go.jp">kaibara.chikako@jaea.go.jp</A><BR>++++++++++++++++End
of Letter+++++++++++++++++++++++++++++++</FONT></DIV>
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