[Neutron] J-PARC newsletter#16

Masatoshi ARAI masatoshi.arai at kek.jp
Thu May 6 14:21:15 CDT 2004


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                    J-PARC Project Newsletter

               _______ No. 16 May, 2004 _______


          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>>
    
    .CONSTRUCTION ENTERED INTO THE FOURTH YEAR.
    .INTERNATIONAL ADVISORY COMMITTEE MET IN MARCH.
    .MAJOR MEMBER CHANGE ON APRIL 1 at JAERI AND THE PROJECT.
    .KEK MOVED TO AN INTER-UNIVERSITY AGENCY ON APRIL 1.

2. <<Accelerator Group>>
  
    .THE BEAM TEST OF THE 20-MEV FRONT END LINAC IS ON-GOING, WHILE
     THE PRODUCTION OF THE ACCELERATOR COMPONENTS IS ON SCHEDULE IN
     GENERAL.

3. <<Nuclear and Particle Physics Group>>

    .CONSTRUCTION OF BEAMLINE COMPONENTS STARTS THIS YEAR.

4. <<Neutron Science Group>>

    .ALL BIDS OF LINE ITEMS FOR JSNS TARGET STATION HAVE BEEN AWARDED.
     THE MLF BUILDING CONSTRUCTION HAS STARTED WITH PILING BY JOINT
     VENTURES OF THE GENERAL CONSTRUCTION COMPANIES. THE DETAILED
     REVIEW OF THE NEUTRON INSTRUMENTS WERE FINISHED AND 7 OUT OF 9
     WERE RECOMMENDED TO PROCEED TO THE FUNDING ACTION FOR THOSE
     PARTICULAR APPLICATIONS.
 
5. <<Muon Science Group>>

    .THE SECOND J-PARC MUON SCIENCE EXPERIMENTAL FACILITY ADVISORY
     COMMITTEE, SO CALLED "MUSAC" WAS HELD ON 2004, FEB.19-20 AT KEK.
    
6. <<Nuclear Transmutation Group>>

    .CONCEPTUAL DESIGN AND R&D ON THE TRANSMUTATION EXPERIMENTAL
     FACILITY WERE PROGRESSED.

7. <<Radiation Safety Group>>
    
    .THE 4TH SAFETY DELIBERATIVE COMMITTEE ON RADIATION SAFETY
     WAS HELD.

8. <<Integrated Control Group>>

    .IMPROVEMENTS HAVE BEEN DONE IN THE 60MEV DTL CONTROL SYSTEM.
 
9. <<Facility Construction Group>>

    .CONSTRUCTION OF THE MATERIAL AND LIFE SCIENCE FACILITY BUILDING
     STARTED.
    .CONSTRUCTION OF 50GEV SYNCHROTRON BUILDING PROGRESSES.

10. <<Announcement of Symposia and Meetings>>

11. <<Editorial Note>>
  
    .Subscribe or Unsubscribe

‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
1. <<Overview>>   By Shoji NAGAMIYA
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

       .CONSTRUCTION ENTERED INTO THE FOURTH YEAR.

          On April 1 the project entered into the fourth year of the
construction.  Due to the suggested one-year delay of the project the
completion date of the project is in the spring of 2008, which is four
years from now.  Nevertheless, all project members are working very
hard every day.  Construction is almost on schedule.  We expect to
have the first beam from the Linac in 2006.  The civil engineering is
in progress rapidly.  The outside scenery of the construction area is
changing day by day.  For example, the roof of the Linac area was
already completed and the roof is now being covered by the soil.
Also, from this budgetary year the construction of neutrino
experiment, muon facility at 3 GeV, and hadron beam lines will start.
The team is now facing the busiest time for the construction.


       .INTERNATIONAL ADVISORY COMMITTEE MET IN MARCH.

          International Advisory Committee (IAC), which is the most
important advisory committee for J-PARC, met in early March.  The
Committee congratulated the new funding for neutrino physics, whereas
it also expressed a strong advice to ensure "balance" across a broad
J-PARC scientific program.  The Committee also emphasizes the is
concern on the future budget profile to ensure the projected
construction schedule.  The detailed report will appear soon on the
homepage of J-PARC.

          In association with the IAC meeting in March, many committee
meetings were held in February and March.  They include 1) Accelerator
Technical Advisory Committee (A-TAC), 2) Users Consultative Committee,
3) Committee for Neutron Experimental Device, 4) Committee for Nuclear
and Particle Physics Experimental Facilities, 5) Committee for Muon
Experimental Facilities, etc.  Results of these committees shall be
described by individual sections of this Newsletter as well as on the
homepage of J-PARC.

          Presently, the committee consists of three Japanese and
eleven non-Japanese scientists.  The previous IAC is the last year by
the present members.  Some committee members will be replaced soon.


       .MAJOR MEMBER CHANGE ON APRIL 1 at JAERI AND THE PROJECT.

          On April 1 it was decided at JAERI that Dr. H. Yokomizo,
who served as a deputy director of the project is now moved up to
Vice Director of JAERI-Tokai.  In association with this change,
Dr. Y. Oyama will serve as a deputy director of the J-PARC project.


       .KEK MOVED TO AN INTER-UNIVERSITY AGENCY ON APRIL 1.

          On April 1 KEK moved into an inter-university agency by
leaving the status of the Government institution.  All federal
universities have also be changed to agencies.  For a distant future
this new movement will affect the J-PARC project, but we are not
observing any direct influences on our project by this organizational
change.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
2. <<Accelerator Group>>   by Yoshisige YAMAZAKI
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
     
       .THE BEAM TEST OF THE 20-MEV FRONT END LINAC IS ON-GOING, WHILE
        THE PRODUCTION OF THE ACCELERATOR COMPONENTS IS ON SCHEDULE IN
        GENERAL.

          After the 30-mA peak current was accelerated up to 20 MeV
last fall, a big trouble happened to the turbo-molecular pump, which
damaged the beam line.  In February, the beam test of the 20-MeV front
end linac was restarted, including the beam chopping test, the monitor
test, the feed-back loop test of the electric field, and so forth.
Both the second (37 MeV) and third (50 MeV) tanks of Drift-Tube Linac
(DTL) were also assembled.  The adjustment of the post couplers is
under way in order to obtain the required field uniformity of 1%.
Among the thirty two Separated DTL (SDTL) cavities (190 MeV), which
follow the three tanks of DTL, the production of twenty two cavities
were completed, while that of the remaining ten cavities will be
completed by this fall.

          Most of the accelerator components for the 3-GeV
Rapid-Cycling Synchrotron (RCS) were ordered by the end (March) of
Japanese Fiscal Year 2003.  The production of the accelerator
components for the 50-GeV Main Ring was also on schedule.  Nearly the
two third of the bending magnets (97 in total) were produced, while
all the power supplies for them were completed.

          The third Accelerator Technical Advisory Committee (A-TAC)
meeting was held in JAERI Tokai site on March 5th and 6th.
Dr. Lloyd Young, who is one of the ATAC members, reviewed the Linac
work in detail, using additional two days before the formal ATAC
meeting.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
3. <<Nuclear and Particle Physics Group>>   by Jun IMAZATO
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

       .CONSTRUCTION OF BEAMLINE COMPONENTS STARTS THIS YEAR.

          The fiscal year 2004 is the first budgetary year for both
Hadron Experimental Facility and Neutrino Facility to start
construction of beamline components.  Detailed designs of the elements
are now going on in the construction group based on the conceptual
studies and R&Ds continued from a few years ago.  Due to the
requirements for radiation-hardness, removal of heat deposit, and safe
maintenances, every element needs very careful design.  R&D will be
conducted further until the last moment of ordering.  For the Hadron
Hall, one of the most concerned elements is the target.  A prototype
of a water-cooled rotating disk system has already been worked out and
waits for testing with a proof model this year.  The beamdump is the
system which needs efficient heat removal.  Now several details of
cooling water path design and its junction to copper blocks are
carefully being designed.  A test model of full-inorganic radiation-
hard Q-magnet was made and tested.  The Neutrino Facility has also a
long list of R&D items.  As was reported before, the development of
combined-function superconducting magnets is the most essential part.
Up to now the coil-winding, the collar and yoke system were proved.
The prototype magnet will soon be tested.  The developments of a
target, a magnetic horn, and a beamdump as well as the design of the
target station are progressing, too.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
4. <<Neutron Science Group>>   by Yujiro IKEDA
   (Materials & Life Science Experimental Facility Group)
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

       .ALL BIDS OF LINE ITEMS FOR JSNS TARGET STATION HAVE BEEN
        AWARDED.  THE MLF BUILDING CONSTRUCTION HAS STARTED WITH
        PILING BY JOINT VENTURES OF THE GENERAL CONSTRUCTION
        COMPANIES.  THE DETAILED REVIEW OF THE NEUTRON INSTRUMENTS
        WERE FINISHED AND 7 OUT OF 9 WERE RECOMMENDED TO PROCEED TO
        THE FUNDING ACTION FOR THOSE PARTICULAR APPLICATIONS.

          In the last three months, the MLF team had finished to order
all line items for neutron station components, and as a result, more
than 30 bids were awarded by multiple venders.  Accordingly, we
established a regular meeting with those venders sitting together to
accelerate the design, fabrication, and installation procedure.   The
mercury target containers, mercury circulation system, moderator
system, low temperature hydrogen circulation system, etc are included.
Right after general construction companies awarded bids for the
conventional facility building of MLF, work of piling, has been
underway.  The building construction will be carried out in close
cooperation with the neutron target station installation for the
facility completion in 2007.  The R&D for the target pitting the
damage issue has progressed to increase knowledge how the pitting-
damage develops in mercury target container with number of pulse
impacts.  In addition, fatigue test are on going using samples after
millions of impacts.  There are clear decrease in the strength
observed.  An R&D for the bonding of AIC to aluminum alloy for
decoupled moderators has been in progress.  We confirmed that there is
a good bonding a large area specimen by HIP treatment.  Open hearings
for the proposed instruments which passed the first review were
coordinated and the reviewing committee thoroughly examined in terms
their appropriateness in installing in the JSNS beam lines in early
stage.  Finally seven out of nines were identified to encourage to
proceed to funding procedure.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
5. <<Muon Science Group>>   by Yasuhiro MIYAKE
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

       .THE SECOND J-PARC MUON SCIENCE EXPERIMENTAL FACILITY
        ADVISORY COMMITTEE, SO CALLED "MUSAC" WAS HELD ON 2004,
        FEB. 19-20 AT KEK.
    
          The first J-PARC Muon Science Experimental Facility
Advisory Committee, so called "MuSAC" was held on 2004, Feb. 19-20 at
KEK, which is settled under the J-PARC Project Director during
construction period.  Committee members were J. M. Poutissou (Chair;
TRIUMF Lab.), J. Akimitsu (Aoyama Gakuin U), S. Ikeda (KEK), Y. Ikeda
(JAERI), M. Iwasaki (RIKEN), K. Nagamine (KEK), N. Nishida (Tokyo
Inst. Tech.), Y. Miyake (KEK), Y. Yamazaki (JAERI), H. Yasuoka (JAERI),
R. H. Heffner (Los Alamos Lab.), Petitjean (Paul Scherrer Inst.),
L. I. Ponomarev (Kurchatov Inst.). As guest member, P. J. C King (the
secretary of ISMS, Rutherford Appleton Laboratory) and R. Cywinski
(the vice president of ISMS of Europe) and K. Nishiyama attended the
meeting.  In the committee meeting, one-year progress and topics of
the project J-PARC muon facility, and experimental programs from KEK
were reviewed, and also a proposal on the core user program was
discussed in order to encourage users to develop and seek funding for
the instrumentation or facilities.  Brief comments were presented at
the international advisory committee meeting by Dr. J. M. Poutissou,
chair of the committee.  The final committee report will be reported
shortly.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
6. <<Nuclear Transmutation Group>>   by Hiroyuki OIGAWA
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

       .CONCEPTUAL DESIGN AND R&D ON THE TRANSMUTATION EXPERIMENTAL
        FACILITY WERE PROGRESSED.

          For the design of the ADS Target Test Facility, the compact
arrangement of the facility was drafted using the double-annular type
Pb-Bi target.  The maintenance procedure of the target was also
investigated.  The thermo-hydraulics and structural analysis of the
target was continued for two types of the target concept: one is for
the demonstration of the high-power Pb-Bi target system and the other
is for the material irradiation.  The R&Ds on Pb-Bi technology and
irradiation damage of material were also continued.

          For the design of the Transmutation Physics Experimental
Facility, various data to be referred in the safety report were
investigated.  The arrangement of the facility was drafted considering
the physical protection systems for nuclear fuel.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
7. <<Radiation Safety Group>>   by Tokushi SHIBATA
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
       
       .THE 4TH SAFETY DELIBERATIVE COMMITTEE ON RADIATION SAFETY
        WAS HELD.

          The 4th safety deliberative committee on radiation safety
was held at KEK on March 25, 2004, and three major items were
discussed: (1) the regulations on the prevention from radiation
hazards for J-PARC, (2) a radiation safety control structure at
J-PARC, (3) the Central Registration of radiation-dose record
organized by Radiation Effects Association.  The regulation must be
completed before the submission of an application for a license of an
accelerator operation to the Ministry of Education, Culture, Sports,
Science and Technology (MEXT).  The first application for the license
is scheduled to be in September of 2005.  Hence the regulation is
expected to be finalized by the end of 2004.  In the application, a
part of linear accelerator components, which are now operating at KEK,
will be brought into the Linac tunnel of J-PARC.  These components
will be activated after about two years operation.  Since there is no
definition of the activated materials in the current Radiation Law, it
seems difficult to submit officially an application for the license to
install these activated components in the Linac tunnel.  The new
Radiation Law, which will introduce the definition of the activated
materials, is expected to be released in May or Jun, 2005.  Then, the
formal use of the radiation control area for the activated materials
will be possible.  The 2nd item is strongly correlated with the
administrative organization of J-PARC, which is now under discussion
at both KEK and JAERI.  The 3rd item is commonly employed at nuclear
electric companies and JAERI.  KEK and all university users are not
familiar with this system and it will be investigated how these users
can join in the system.
 

‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
8. <<Integrated Control Group>>   by Tadahiko KATOH
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
       
       .IMPROVEMENTS HAVE BEEN DONE IN THE 60MEV DTL CONTROL SYSTEM.
 
          Application programs have been developed in the 60MeV DTL
control system.  Newly developed or improved data taking and display
programs for beam monitors and other equipment are used for operation.
Debugging and tuning of NetDev and WE-7000 measuring system drivers
and driver support routines are in progress.

          Beam abort system for Main Ring is under logical designing.
The beam in the Main Ring will be aborted by being kicked out from the
accelerator into the beam dump in case of abnormal operation caused by
magnet power supply failure, radiation exceeding certain limit, etc. .


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
9. <<Facility Construction Group>>
                              by Hideo NARUSE and Tsuruhiro MATSUNAGA
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

       .CONSTRUCTION OF THE MATERIAL AND LIFE SCIENCE FACILITY
        BUILDING STARTED.

          As for the Linac Building, construction of the accelerator
tunnel progresses steadily; the construction of the underground part
has been finished and the construction above ground will start in
April.  As for the 3GeV Synchrotron Building, construction of the
accelerator tunnel is going on.

          As for the high-voltage of 153 kV electricity
receiving/transforming substation, installations of equipments have
been finished and the integrated tests are in progress now.  As for
the high-voltage of 66 kV electricity receiving/transforming
substation, transformers and gas insulation switches will be installed
since the beginning of April.  Construction of the Material and Life
Science Facility Building was started in March.

       
       .CONSTRUCTION OF 50GEV SYNCHROTRON BUILDING PROGRESSES.

          As for the 50 GeV Synchrotron Building, construction of the
tunnel at the first part has been almost finished.  The excavation
works moves into high gear at the second part and the land development
progresses at the third part of the 50 GeV Synchrotron Building.  The
exploration of the archeological excavation, which has been continued
since last fiscal year, was started on April 12 as the work in this
fiscal year.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
10. Announcement of Symposia and Meetings
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾

3rd International Workshop on Nuclear and Particle Physics (NP04)
August 2 - 4, 2004 at J-PARC
with a Separate Working Session on Neutrino Physics
August 24 - 26, 2004 at KEK.


‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
11. Editorial Note
‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾‾
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

        Editorial Board:
             Masatoshi ARAI (chair):  masatoshi.arai at kek.jp
             Koji YOSHIMURA           koji.yoshimura at kek.jp
             Yujiro IKEDA:            ikeda at cens.tokai.jaeri.go.jp
             Nobuo OUCHI              ouchi at linac.tokai.jaeri.go.jp
             Shinya SAWADA:           shinya.sawada at kek.jp
        English Editor:
             Dick Mischke             mischke at lanl.gov

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