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J-PARC Project Newsletter
_______ No. 11 January, 2003 _______
High Intensity Proton Accelerator Project proposed jointly
by the Japan Atomic Energy Research Institute (JAERI)
and the High Energy Accelerator Research Organization (KEK)
http://j-parc.jp/
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HEADLINES AND CONTENTS
1. <<Overview>>
.PROJECT EXPECTS TO RECEIVE REASONABLE FUNDING IN JFY2003.
.CONSTRUCTION IS MOVING RAPIDLY.
.SEVERAL COMMITTEE MEETINGS ARE EXPECTED.
.MANY LETTERS OF INTENT HAVE BEEN RECEIVED.
.SCIENCE FRONTIER 21 MEETING RESTARTED.
.OTHER ACTIVITIES.
2. <<Nuclear and Particle Physics Group>>
.MANY LOI'S HAVE ARRIVED FOR NUCLEAR AND
PARTICLE PHYSICS EXPERIMENTS.
3. <<Neutron Science Group>>
.SIX VENDORS AWARDED BIDS FOR THE STRUCTURAL COMPONENTS
OF THE 1 MW SPALLATION NEUTRON TARGET STATION.
4. <<Muon Science Group >>
.AN ATTEMPT IS STARTED TO DESIGN A PILLOW-SEAL AS THE
VACUUM CONNECTION IN THE VICINITY OF THE MUON TARGET.
5. <<Nuclear Transmutation Experimental Facility Group>>
.THREE-YEAR R&D PROGRAM WAS APPROVED FOR ADS TECHNOLOGY.
6. <<Radiation Safety Group>>
.THE 1ST DELIBERATIVE COMMITTEE ON RADIATION SAFETY
MET AT JAERI.
7. <<Integrated Control Group>>
.DESIGN OF A TIMING DISTRIBUTION SYSTEM HAS BEEN COMPLETED.
8. <<Facility Construction Group>>
.CONSTRUCTION OF THE 3GEV SYNCHROTRON BUILDING WAS CONTRACTED.
.REMAINS OF ANCIENT SALT FARMS WERE FOUND AT THE SOUTH AREA.
9. <<Announcement of symposiums and meetings>>
10. <<Editorial note>>
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1. <<Overview>> By Shoji NAGAMIYA
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.PROJECT EXPECTS TO RECEIVE REASONABLE FUNDING IN JFY2003.
At the end of December the Government announced a
preliminary figure for the next-year (JFY2003) budget plus the
supplemental fund for JFY2002. Almost the full amount of our request
was approved if the supplemental budget for JFY2002 is added to the
normal JFY2003 budget. In addition, the creation of a new Center called
the Neutron Science Research Center is approved to start in JFY2003 at
JAERI. Also, at KEK two additional positions for professors and one
promotion from associate to full professor are approved for JFY2003.
.CONSTRUCTION IS MOVING RAPIDLY.
Accelerator construction is progressing well. Concerning 50GeV
at KEK, contracts for magnets, vacuum systems, power supplies, etc.
have been awarded. Over 60% of the contracts were awarded. For Linac at
JAERI, contracts for major elements except for the beam line elements
from the Linac to 3 GeV (L3BT) have been awarded. Contracts for the
cooling system, etc. will come soon. For 3GeV at JAERI, contracts for
a part of the magnets and ceramic vacuum chambers have been awarded.
Contracts for power supplies, rf acceleration systems, injection
components, etc. will come later.
Facility construction for the Linac and 3 GeV areas is
progressing smoothly. The scenery of the construction area is changing
every day. Roads and a new bridge for construction were completed.
For the 50 GeV construction, the Ground Breaking Ceremony for the
south area is planned on January 20. In this south area, however,
remains of ancient salt farms were discovered at many places. The
construction area for 50 GeV is divided into four sub-areas, A to D.
No remains were discovered in the A area, while many remains were
found in the B area. Investigations will continue in the C and D
areas in early February. Some delays (by a few months) are
anticipated in the construction work for the 50 GeV facilities.
.SEVERAL COMMITTEE MEETINGS ARE EXPECTED.
For the International Advisory Committee, which is chaired
by Prof. J. White (Australia), two members have been added:
Prof. A. Suzuki (Tohoku Univ.) to replace Prof. Y. Totsuka and
Prof. W. Henning (Director at GSI).
The next meeting will be held on March 10-11.
The Accelerator Technical Advisory Committee,
chaired by Dr. S. Holmes (FNAL), will meet on March 7-8
in conjunction with the International Advisory Committee meeting.
A new committee called the Muon Experiments Planning Committee
was established and its first meeting is expected on February 7.
.MANY LETTERS OF INTENT HAVE BEEN RECEIVED.
The Project Office called for two types of Letters of Intent
last year. One is for neutron instruments. The call of LoIs will be
made once a year. For the year of 2002, 18 applications were submitted
in December 2002. The other is for nuclear and particle experiments.
Over 30 Letters of Intent were submitted to the Project Office on
January 10.
.SCIENCE FRONTIER 21 MEETING RESTARTED.
A committee called the Science Frontier 21, created by
Ibaraki Prefecture, started its function with a new membership from
November 2002. The chair is Prof. K. Nakai. Two sub-panels were created,
one to discuss an industrial usage of J-PARC and the other to discuss
improving the environment around the J-PARC location such as living
areas for foreign guests, etc. The final recommendations will be
written
in March 2003.
.OTHER ACTIVITIES.
1) The Tokai Branch office at KEK was started on January 1.
2) Discussions on the organizational chart for the operational stage
have been started by the project team, by the KEK committees and by
the Steering Committee for J-PARC.
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2. <<Nuclear and Particle Physics Group>> by Tomofumi NAGAE
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.MANY LOI'S HAVE ARRIVED FOR NUCLEAR AND
PARTICLE PHYSICS EXPERIMENTS.
We have received 31 Letters of Intent for Nuclear and
Particle Physics Experiments at the J-PARC (see NewsLetter #9). Among 31
LOIs, we have one LOI for a neutrino oscillation experiment, several
LOIs
each for K decay experiments, strangeness nuclear physics, and hadron
physics, and a few for muon physics. There are also several LOIs for new
facilities such as a pulsed proton beam facility for a high-intensity
muon source (PRISM) and an antiproton source, a future neutrino factory
(NufactJ), a high-momentum beam line, and a test beam facility.
In those LOIs, coming from Japan, US, Canada, and Russia, more than 400
people from all over the world are listed. We still expect a few
post-deadlinesubmissions from those already contacted.
The Committee to consider the LOIs is going to be formed
in January, 2003. The first Committee meeting will be held early
this spring.
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3. <<Neutron Science Group>> by Yujiro IKEDA
(Materials & Life Science Experimental Facility Group)
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.SIX VENDORS AWARDED BIDS FOR THE STRUCTURAL COMPONENTS OF
THE 1 MW SPALLATION NEUTRON TARGET STATION.
Bids for the fabrication and installation of structural
components for biological shielding, liners, the He vessel,
the proton-beam window, the reflector vessel and plugs, and the
reflector/moderator remote-handling devices, etc, have been evaluated
and 6 vendors have been awarded contracts. Additional procedures for
the vendors are underway for manufacturing a target cart, supplemental
shielding structures, remote handling devices, an alignment device, etc.
The MIMTM (Magnet IMpact Testing Machine) is still working to achieve
more than 100 million cycles of negative pressure on the SS-316 sample
to evaluate the erosion rate. An experiment of neutronics with a 100%
para-state hydrogen condition has demonstrated that the current
calculation code can predict the cold neutron performance in a
reasonable way.
The final report of N-TAC has been submitted to the IAC
chairman and the Project Director.
According to the call for Letters of Intent (LOI's) on
Neutron Instruments for JSNS, eighteen proposals have been submitted
to the Project Director by December 6, 2002. They are to be reviewed
by the neutron instrument planning committee by the end of this fiscal
year.
A Workshop on the Spallation Target Materials was held on
December 4 and 5, 2002 at KEK. Effective discussion on the mercury
pitting issue was realized based on the most recent data.
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4. <<Muon Science Group>> By Yasuhiro MIYAKE
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.AN ATTEMPT IS STARTED TO DESIGN A PILLOW-SEAL AS THE
VACUUM CONNECTION IN THE VICINITY OF THE MUON TARGET.
Vacuum connections, which will be used in the beam pipes of
both the primary proton beam line and the extraction secondary beam
lines in the vicinity of the muon target are expected to suffer
not only from tremendously high radiation, but also from corrosion
induced by NOx in irradiated air. It is expected that non-radiation
hard components such as rubber "O" rings can never be utilized.
It is also essential to adopt a special vacuum flange which can
be operated by remote handling. Therefore, we have recently
started a designing work of a pillow seal, which was originally
developed at PSI, in order to meet our requirement.
The J-PARC Muon Experiments Planning Committee, so called
MuSAC, is being organized under the J-PARC Project Director during the
construction period, in order to discuss items related to the Muon
Science Facility at J-PARC and to report to the Project Director and
Muon Science Facility construction team. The committee will review and
advise on the following subjects:
1) Project definition of the experimental facility to be constructed.
2) Content of the 1st phase experimental program.
The first committee meeting will be held on February 7, 2003 at KEK.
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5. <<Nuclear Transmutation Experimental Facility Group>>
by Hiroyuki OIGAWA
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.THREE-YEAR R&D PROGRAM WAS APPROVED FOR ADS TECHNOLOGY.
Aiming at the R&D for future ADS (Accelerator Driven
Transmutation System), a joint team of JAERI, KEK, some universities and
industrial companies applied to the competitive budget of the
"Development
Projects of Innovative Nuclear Energy System Technology" funded by the
Ministry of Education, Culture, Sports, Science and Technology (MEXT) of
the Government of Japan, and consequently the three-year program has
been
approved. This R&D program includes the trial manufacturing of
cryo-modules
for super-conducting LINAC, various development on lead-bismuth (Pb-Bi)
technology, and the design study on the subcritical core. The total
budget
for 3 years will be approximately 10M$.
Besides the above new program, various R&D for the
Transmutation Experimental Facility (TEF) has been carried out. For
the Pb-Bi loop test, the oxygen concentration in Pb-Bi was measured by
an infrared spectroscopic method. The result showed 1.0E-3 mass%,
which is almost equal to the theoretical saturation concentration at
the operational temperature of 450oC. As for the development of the
oxygen sensor, a trial test with a Pt/air reference system was carried
out in static liquid Pb-Bi. It was found that the sensor worked well
above 450oC.
A workshop on the nuclear transmutation technology using ADS
was held on Nov. 26 at Tokyo. Active discussions were held on the
current
status of TEF design and the effect of the transmutation technology on
the nuclear waste disposal.
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6. <<Radiation Safety Group>> By Nobuo SASAMOTO
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.THE 1ST DELIBERATIVE COMMITTEE ON RADIATION SAFETY
MET AT JAERI.
The 1st Deliberative Committee on Radiation Safety met at JAERI
on October 3. After electing Mr. Hamada as the chairman, the outline of
J-PARC and the construction schedule were presented. After the committee
meeting, the members visited the construction site, where site clearing
has started. The 2nd committee meeting will be held in February, 2003.
The guideline for the design and construction using low
activation-ized concrete was prepared in cooperation with the
construction division. To investigate the characteristics of the low
activation-ized concrete, an irradiation experiment was carried out
together with ordinary sandstone-based concrete using the 14MeV
monochromatic neutron beam of the Fusion Neutronics Source Facility
(FNS) at JAERI.
Another issue for the radiation safety group was to submit
applications for the safety of the following two experimental
facilities to the Nuclear Energy Safety Division, Ibaraki Prefecture
Government;
(1) the Material and Life Science (MLF) experimental facilities,
which include the 3-NBT beam line, the Muon Science Facility and
the Neutron Science Facility,
(2) Nuclear and Particle Physics Facilities.
Based on the approval of these proposed projects by the Ibaraki
Nuclear Energy Safety Committee, the construction of these two
facilities will be started on the proposed schedule.
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7. <<Integrated Control Group>> By Junsei CHIBA
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.DESIGN OF A TIMING DISTRIBUTION SYSTEM HAS BEEN COMPLETED.
Detailed design for the J-PARC timing distribution system
has been made by investigating usage of trigger signals in each
equipment element. Three timing signals, (1) trigger clock of 50Hz,
(2) master clock of 12MHz and (3) trigger "type", are distributed from
the central control room (CCR) to each local control room via optical
fiber. A set of electronic modules has been designed including a
transmitter, a receiver, o/e and e/o converter and a fan-out. Part
of the modules are now being tested.
Standard network techniques will replace different kinds of
field busses in future. We anticipate the trend by developing network
based controllers. An EPICS driver for the WE7000 measurement station
used as a waveform digitizer has been developed. Recently, EPICS drivers
for Programmable Logic Controllers (PLC's) and a Ethernet interface
board
have been developed and successfully used for the 60MeV Linac at the
KEK site.
The personal protection system (PPS) is very important and
should be extremely reliable. It consists of a supervisory PLC in
the CCR and PLC's in the local control rooms. Final design in the
Linac area was recently completed.
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8. <<Facility Construction Group>>
by Hideo NARUSE and Takashi NANBU
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.CONSTRUCTION OF 3GEV SYNCHROTRON BUILDING WAS CONTRACTED.
A new contract for the construction of the 3GeV Synchrotron
Building has been awarded. Construction of the 154kV electricity
receiving control building and the 66kV electricity
receiving/transforming
substation for the Linac will be contracted soon.
As for the site preparation work, which was contracted in
March 2002, the site work for the Linac Building and the excavation
work for the 3GeV Synchrotron Building are progressing satisfactorily.
Consideration for reducing the impact of the construction work on the
subterranean water was started based on the results of investigations
for the subterranean water/stratum structure for whole construction
site and analysis of level fluctuations of the subterranean water due
to the construction work.
.REMAINS OF ANCIENT SALT FARMS WERE FOUND AT THE SOUTH AREA.
The exploratory drilling to explore archeological sites
was performed from September to December 2002 at the south area, which
includes the 50GeV Synchrotron Building, the Material & Life Science
Facility and the Nuclear & Particle Physics Facility. Some
archeological evidence was found at the south area, while nothing
was found at the central area, which includes the Linac Building and
3GeV Synchrotron Building, in the exploratory drilling performed in
past days. KEK ordered the first and the second quarter parts of the
50GeV Building and high voltage electricity receiving/transforming
substation. As the investigation of the archeological digging at
the site of the second quarter part of the 50GeV Synchrotron building
will be performed from April to September 2003, the construction
schedule will be delayed consequently. The construction schedule of
the second quarter part of the 50GeV Building is being rearranged to
minimize the construction delay. Other construction of the first
quarter part of the 50GeV Synchrotron Building and the electricity
receiving/transforming substation will be completed on schedule.
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9. Announcement of symposiums and meetings
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1) The neutron instrument planning committee, February 3.
2) The Muon Experiments Planning Committee, February 7.
3) The Accelerator Technical Advisory Committee(A-TAC), March 7-8
4) International Advisory Committee (IAC), March 10-11.
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10. Editorial note
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Editorial Board:
Masatoshi ARAI (chair): masatoshi.arai@kek.jp
Koji YOSHIMURA koji.yoshimura@kek.jp
Yujiro IKEDA: ikeda@cens.tokai.jaeri.go.jp
Nobuo OUCHI ouchi@linac.tokai.jaeri.go.jp
Shinya SAWADA: shinya.sawada@kek.jp
English Editor:
Dick Mischke mischke@lanl.gov
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