THE INTERNATIONAL ADVISORY COMMITTEE
ON THE J-PARC PROJECTREPORT
Meeting held February 29th - March 1st 2016
In the J-PARC research building, Tokai, Japan

Reaching new heights in science achievements
April 4th, 2016

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Contents
EXECUTIVE SUMMARY .......................................................................................................................4
SUMMARY OF THE RECOMMENDATIONS BY SECTIONS IN THE REPORT ...............................................5
Management............................................................................................................................................. 5
Safety ........................................................................................................................................................ 5
Accelerators .............................................................................................................................................. 5
Particle and Nuclear Physics ..................................................................................................................... 5
Material and Life Science Facilities ........................................................................................................... 6
MUSE Facility ............................................................................................................................................ 6
TEF (Transmutation Experimental Facilities) ............................................................................................ 6
INTRODUCTION .................................................................................................................................7
GENERAL STATUS OF THE PROJECT .....................................................................................................7
SAFETY ..............................................................................................................................................8STATUS OF THE ACCELERATOR SYSTEMS.............................................................................................9SCIENTIFIC PROGRAMS ....................................................................................................................10
MATERIAL AND LIFE SCIENCES FACILITY (MLF) ....................................................................................... 11
MUSE ....................................................................................................................................................... 13
NUCLEAR TRANSMUTATION ................................................................................................................... 14
INSTITUTIONAL SUPPORT BY KEK AND JAEA .......................................................................................... 14
MEXT view of J-PARC .............................................................................................................................. 15
Conclusions .....................................................................................................................................15
Appendix I .......................................................................................................................................16
Appendix II ......................................................................................................................................17
Appendix III .....................................................................................................................................18

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EXECUTIVE SUMMARY
The International Advisory Committee of J-PARC (J-PARC-IAC) met on Feb 29th and March 1st 2016 in the
new research building of J-PARC to evaluate the past performance of the laboratory and advise its
director on future directions. The IAC found that considerable progress was made on implementing a
new Safety program under the Safety Division leadership and that a sustain effort will continue to berequired to develop a safety culture at all levels of the operation, with particular attention paid to thecontractual workforce and users. The results presented by the accelerator group to both the A-TAC andthe IAC demonstrate that the RCS and the MR accelerators will be able to reach design criteria
performance .The IAC is pleased to hear about the new funding approved for the upgrade of the MR
power supplies . However the amount of beam time delivered was considerably reduced by reliability
problems most notably with the failures of two mercury targets in the MLF which points to the need to
refocus the global effort on sustainable and reliable beam delivery beyond accelerator peak
performance. The IAC recommends implementing a new milestone on beam delivery andreprogramming the overall effort to meet this milestone. Most of the experimental instruments are now
either complete or soon to be fully operational and more than ever the focus of the science divisions
should be on delivery of science and publication of scientific results. The IAC was delighted by the major
awards obtained by J-PARC related users, most notably the Nobel Prize of Professor Kajita and thebreakthrough prize earned by the T2K team but also the prizes awarded to young members of J-PARC’suser community. New results were presented from all areas of activity, MLF, neutrino, Hypernuclear
physics, Muon and MuSR experiments while the COMET experiment is making great strides. This is very
promising and the IAC is encouraging J-PARC to continue to grow its portfolio of top publications byimplementing an effective user support policy. This is also the view expressed by MEXT and by theparent institutions but it will require adequate and sustained funding. For the ADS program, the IAC
appreciates the advances made to define the TEF-T and TEF-P components of the facility and supports
giving priority to the TEF-T part in view of the more difficult regulatory requirements required to bring
nuclear fuel loaded with minor actinides to the J-PARC site for TEF-P. Finally, the IAC recommends thatmanagement pays more attention to the gender imbalance at all levels of the J-PARC operation andmanagement.

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SUMMARY OF THE RECOMMENDATIONS BY SECTIONS IN THE REPORTManagement•••

Develop a J-PARC science driven agenda to be expressed in a global vision statement and divisional
goals based upon science achievements.
Explore possibilities for adding key scientific personnel to drive this science agenda.
Focus the team on beam delivery performance by establishing a milestone in terms of beam
delivered to experiments and obtaining the funding and personnel necessary to meet thatmilestone while maintaining a safe environment.
Safety••••The continuing effort to move from a top down to bottom up approach to safety must be promoted
at all levels.
The risk register is very much concentrated on the safety aspects and lacks a substantial analysis of
the high level risks, the so-called enterprise risks, owned by the top management, which might notnecessarily descend from the occurrence of a serious accident, but for instance could originate
from single points of catastrophic failure of the beam delivery systems , from a drastic reduction of
the operation budget, or from the failure to meet scientific goals. The IAC recommends their
inclusion in the risk register and risk analysis.
A strict oversight should be implemented by defining for each task a Leader in Matter of Safety,
with the authority to stop work in case of safety infringements whether committed by a contractor,
a user or an employee.
Establishing a permanent crisis team (and its alternate) available 24/7. These teams should include
the needed technical/admin people as well as the communication sector. The teams should be led
by a crisis manager, with the Director (or his/her alternate) having the last word in the decision
process. The team should be convened with an automatic procedure in a designated crisis room,always ready.
Accelerators•

Develop a strategy to maximize facility availability and science output.
Particle and Nuclear Physics•

Neutrino
J-PARC, KEK, and MEXT should continue their commitment toward maximal utilization of the T2K
research program, which will most benefit from stable and reliable operation of the Main Ring andassociated neutrino beamline.

•

Particle Physics
The IAC fully endorses the plea to have a high intensity run in 2016 for the KOTO experiment, inview of the importance of the measurement and to stay ahead of the competition.

•

Muon

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J-PARC needs to determine the funding profile for the muon experiments to determine if they canbe mounted on a schedule to keep them competitive. Additional delays will make it difficult for the
program to have the international impact that was envisioned with the schedule as put forward atlast year’s IAC meeting.
•Nuclear physics
The IAC supports the move to a kaon beam based program for the next cycles.
Material and Life Science Facilities•••

Management should engage the broader research community to identify the most importantscientific needs. The instrument improvements required to meet these needs should besequentially focused on a small number of instruments, with the sequence of instruments
prioritized according to the most pressing scientific needs.
Need to develop a Strategic Science Plan addressing the emerging Grand Challenges that can betackled by the MLF
The present heterogeneous J-PARC organizational structure and multiple funding sources iscomplex. It may also be confusing to potential users. Strong management will be required tocoordinate these different elements in order to translate a strategic science plan for MLF into a
coherent set of prioritize actions that maximize scientific productivity and impact. A consolidated or
unified user community with a single voice and a single communication channel to MLF
management may help to avoid confusion and to provide a coordinated response to user needs.
MUSE Facility•

With the successful commissioning of three of the four main secondary beamlines (D, S, U), theMUSE group should focus on the delivery good science from these beamlines and on the urgent
construction of the H line for the fundamental g-2 experiment to remain competitive and for otherpotential unique applications of reaccelerated muon beams.
TEF (Transmutation Experimental Facilities)

•
•
•
•

Continue the support R&D needed to secure the TEF construction.
Make a full effort to get approval from the government for the construction of TEF facility within JPARC, by concentrating on the TEF-T that is of value in the international scene of Accelerator Driven
Systems (ADS) and material testing.
Give a high priority for starting up the TEF-T which is less complex in terms of licensing than the
TEF-P.
Evaluate carefully the usefulness of TEF-P loaded with Minor Actinide (MA) based Fuel in terms of
the safety assurance in particular with the vision to make the J-PARC an open campus for the public,
and in terms of an international perspective by considering other facilities that could be moresuitable for this work.

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INTRODUCTION
The J-PARC International Advisory Committee (IAC) met at the J-PARC new research building on Feb 29th
and March 1st to hear presentations from the Director and from group leaders regarding the progress
accomplished in the past year and the ambitions for the future. The IAC also heard from the funding
agency (MEXT) and from the two parent organization (KEK and JAEA). It also toured some of the facilities
on Tuesday afternoon (MLF, COMET, and Neutrino ND280). The committee had a chance to meet thestaff at a reception which was attended by the mayor of Tokaimura. The IAC was pleased to hear fromthe mayor that the city fully supports the laboratory and is willing to work with J-PARC to welcome its
users. The agenda for the meeting is given in Appendix I and the committee membership in Appendix II.
Two members (Prof. H. Stoeker and Prof. Donald Geesaman) could not join us during this meeting). In
this report the IAC presents its findings and its recommendations following the order of thepresentations and responding to the charge given by Director N. Saito (see Appendix III).

GENERAL STATUS OF THE PROJECT
Director N. Saito presented an overview of the J-PARC laboratory. He pointed out the recent changes
that he introduced in the management team personnel to help him carry out his vision for the coming
year. In his selection of the highlights of the past years, he chose to emphasize the major awards
obtained by J-PARC related researchers: they include Prof. Kajita (a member of T2K) for his Nobel prize,
Prof Nishikawa Founding member of T2K and the T2K collaborators for the 2016 Breakthrough Prize inFundamental Physics, the Nishikawa prize awarded to a team of the G-2 collaboration, and the JSNS
special recognition of the PLANET team. The IAC congratulates the winners and thanks them for theircontributions to science and for the visibility it brings to J-PARC.
The accelerator team has demonstrated that there was no show stopper from the accelerator chain inachieving the design value for beam power directed to the MLF (1 MW) and in the near future to theneutrino target (750 kW) now that the power supply upgrade in the Main Ring (MR) has been funded.
The slow extracted beam to hadron users is improving and can meet the requirements of several
experiments.
The year was not without challenges. Most notably two MLF target failures contributed to a significantly
reduced beam delivery to neutron and MUSE users (20%), while other problems affected the MR and
Neutrino users. Clearly, as the accelerators are pushed towards their design goals, the weakercomponents are being tested to their limits and one needs to refocus the technical effort towards
improving the reliability and stability of the overall beam delivery systems. The IAC would like to pointout that this is also linked to the safety, quality control, and crisis management issues discussed in thesafety section of the report.
Significant progress has been made for mounting the COMET experiment to search for physics beyond
the Standard Model. The new building extension is operational and components of the beamline arebeing assembled. The MUSE facility has an improved D line with a new superconducting solenoid, the U
beamline has been commissioned and the first Ultra Slow Muon detected, the S line is partiallyoperational with two stations, and the H line is being finalized.

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Several experiments made use an improved slow-extracted proton beam to the hadron hall andimportant results were published (in Phys. Rev. Letters.). The hypernuclear program finished a series ofmeasurements using pion beams and is moving to a phase using kaon beams.
Overall the facility is now suffering from reliability and stability issues which must be tackled in parallel
while achieving the design performance of the accelerators. This involves paying attention to the fullslate of systems needed to deliver safely intense beams to experimental stations in each area.
Recommendations• Develop a J-PARC science-driven agenda to be expressed in a global vision statement and indivisional goals based upon science achievements.
• Explore possibilities for adding key scientific personnel to drive this science agenda.
• Focus the team on beam-delivery performance by establishing a new milestone in terms of beam
delivered to experiments and obtaining the funding and personnel necessary to meet thatmilestone while maintaining a safe environment.

SAFETY
Deputy Director for Safety, Tetsuro Ishii, gave a status report regarding the safety environment at JPARC. The IAC acknowledges the prompt action J-PARC has taken in response to the 2015
recommendations and commends management for the achieved results.
A global approach based on the Safety First principle and on the ownership of the safety policies by all
the employees, users, and contractors has been implemented, by the definition of a new formal risk
management structure, which has generated a site-wide-risk register containing the assessment,
ownership, mitigation, and update of each risk.
A new formal crisis management structure has also been created, and the various levels of crisis havebeen redefined.
In parallel, a strong effort has been also made in the promotion of the safety culture and of thecommunication to improve the relation with the external bodies, as well as to improve the internal
awareness.
The IAC has been also impressed by the very good incident record in the last period.
Recommendations
Although the IAC globally endorses the adopted measures, there are a few points which should be taken
in consideration.
• The continuing effort to move from a top down to bottom up approach to safety must be promoted
at all levels.
• J-PARC is using a substantial number of contractors for the various activities of the laboratory,
including sensitive ones, who are trained to comply to the basic safety rules of the laboratory
before they carry out their activities. Considering that any incident caused by a contractor would
compromise the reputation of the lab, we recommend that a strict supervision be implemented bydefining for each task a Leader in Matter of Safety, with the authority to stop work for safety
infringement whether committed by a contractor, a user, or an employee.

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•

•

The risk register is very much concentrated on the safety aspects and lacks a substantial analysis of
the high level risks, the so-called enterprise risks, owned by the top management, which might notnecessarily descend from the occurrence of a serious accident, but for instance could originate
from single points of catastrophic failure of the beam delivery systems, from a drastic reduction of
the operation budget, or from the failure to meet scientific goals. The IAC recommends their
inclusion in the risk register and risk analysis.
We applaud the introduction of crisis drills which have been carried out in the past months and wesuggest to further improve their organization by:–

Establishing a permanent crisis team (and its alternate) available 24/7. These teams should
include the needed technical/admin people as well as the communication sector. The teams
should be led by a crisis manager, with the Director (or his/her alternate) having the last wordin the decision process. The team should be convened with an automatic procedure in adesignated crisis room which is always ready.

–Contracting an external company to organize drills (at least one per crisis team), where thescenario is unknown to anybody in the lab. The ensuing debriefing will be worth the money
spent, by exposing possible weaknesses in the crisis management.

STATUS OF THE ACCELERATOR SYSTEMS
Based upon the presentation by Dr. K Hasegawa and the report from the A-TAC given by its chair Dr. T.
Roser, it is clear that there has been excellent progress of the performance of the J-PARC accelerator
complex over the last year. The J-PARC facility is now on track to soon achieve the original performancegoals of the J-PARC project. The IAC is pleased to note that the Main Ring Power Supply upgrade is fully
funded and underway. This will provide a 750 kW beam to the neutrino facility by FY18. Unfortunately,
difficulties with the MLF target prevented the new high-intensity capabilities of the RCS of up to 1 MWof beam power to be used for the science program.
The facility needs to shift the main emphasis from achieving maximum beam power performance toreliable and stable facility operation. Based on a comprehensive reliability analysis, the necessary
strategies, procedures and hardware improvements and upgrades should be implemented to maximize
the facility availability. This includes the implementation of an effective machine protection system.
The IAC notes that the J-PARC accelerators are capable of causing major damages at the single-pulse
level and hence machine and beamline protection are critical.
The IAC is satisfied that the spares situation for the accelerators is generally under control: This is true
for the critical LINAC Klystrons which are reaching their expected lifetime of operation. A spare RFQ isavailable should it be needed.
However some critical issues remain with the spare MLF and neutrino targets, neutrino horns etc.
Recommendation
Develop a strategy to maximize facility availability and science output.
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SCIENTIFIC PROGRAMSPARTICLE AND NUCLEAR PHYSICS
Neutrino Physics
The 2015 Nobel Prize in Physics and the 2015 Breakthrough Prize have highlighted the achievements
and promise of the J-PARC neutrino program. The program this year has focused on anti-neutrino
beams, where oscillations have been observed in disappearance measurements and hints of oscillationsin appearance searches. The T2K experimental program has and continues to be the particle physics
flagship at J-PARC and is a solid platform from which to plan and launch next generation neutrino
physics initiatives. The experiment, laboratories, and agencies are to be congratulated for an
outstanding year.
Meanwhile, the NOvA experiment, at Fermilab in the USA, has achieved stable operations and is now
producing scientific results. With both the T2K and NOvA programs operating well, it is timely for thetwo collaborations to work towards optimizing the world-wide program through coordinated choices ofbeam configurations (e.g. neutrino vs anti-neutrino running).
Recommendation
J-PARC, KEK, and MEXT should continue their commitment toward maximal utilization of the T2K
research program, which will most benefit from stable and reliable operation of the Main Ring andassociated neutrino beamline.
Particle Physics
Prof. Taku Yamanaka presented the status of the Kaon Physics at J-PARC, describing the status of theexperiments E36 and E14 (KOTO).
E36 is an experiment that has completed data and that has been dismounted in early 2015. It iscurrently completing data analysis. Its goal was to look for lepton universality safety infringements in theKl2 decays, by measuring the ratio of the decay amplitudes of K+ -> e+ ν(ν) and K+ -> µ+ ν(ν), which istheoretically known in the Standard Model with a precision of .04%. Its goal was to measure this ratiowith an error of 0.25%, in this way surpassing the best limit set by the NA62 experiment at CERN (0.4%).
Unfortunately, the present best forecast for the achieved sensitivity will be 0.5%, due mainly to the poor
statistics collected and to a minor extent to a poorer performance of the apparatus. It could still be
improved with a more refined analysis.
E14 (KOTO) is an international collaboration poised to measure the rare (and CP violating decay) KL ->ν,ν bar which can be reliably calculated with an error ~2% in the Standard Model to have a Branching
Ratio Br = 2.4x10-11. Any deviation from this Branching Ratio would be a clear hint of new physics, whose
scale could be inferred by the size of the deviation. KOTO is therefore a very important actor in theindirect search for new physics and complements the direct searches performed at the LHC. It is incompetition with a similar experiment at CERN (NA62), which studies a similar rare decay for the
charged Kaons and which is currently completing its commissioning and is starting its physics run.
KOTO has performed its commissioning in 2013 and then, after the long shutdown, in 2015 (20 times
more data collected) and it is preparing for its physics run with a complete detector, a large

10improvement in the Data Acquisition system, allowing it to sustain in excess of 270 kW beam intensity,and a refined way to get rid of the neutron background.
Recommendation
The IAC fully endorses the plea to have a high-intensity run in 2016 for the KOTO experiment, in view of
the importance of the measurement and the desire to stay ahead of the competition.
Muon Physics
The J-PARC particle physics muon research program made important advances in 2015, most notably
excellent progress on infrastructure and beam components for the COMET experiment andbreakthrough R&D on increasing muonium production yields critical to future experiments based onhigh precision ultra-cold muon beams. Detector systems for COMET and the precision muon program
have also advanced this year. The muonium breakthrough and progress on precision muon beam
detectors are necessary steps for the J-PARC g-2 program to confirm any observation of new physics
made by the Fermilab g-2 program which is rapidly advancing. The muon program as a whole however
has not kept pace with earlier schedule milestones. The scientific landscape is competitive, with a longestablished program at the PSI facility in Switzerland continuing a series of upgrades, and new programs
at Fermilab in the USA which are well supported and now in the construction phase. There is a growing
possibility that the J-PARC muon program may not remain competitive on the world-wide landscape.
Sustained funding will be important for the program to remain competitive.
Recommendation
J-PARC needs to determine the funding profile for the muon experiments to determine if they can bemounted on a schedule to keep them competitive. Additional delays will make it difficult for the
program to have the international impact that was envisioned with the schedule as put forward at lastyear’s IAC meeting.
Nuclear Physics
The nuclear physics program is now focusing on hypernuclear studies using K beams in the Hadron Hall.
The work being carried out in this area is unique in the world and is showing good progress with therecent measurement of a large-charge-symmetry breaking effect in the A=5 hypernuclei. The team thatcarried out this work is to be congratulated on obtaining this result rapidly and for having published it
quickly in Physical Review Letters. This first result bodes well for a longer term program of experimentsthat will help quantify the strangeness degree of freedom in the nuclear force. The performance of theslow-extraction system is now allowing this program to be started.
MATERIAL AND LIFE SCIENCES FACILITY (MLF)
There have been some excellent recent scientific achievements in the neutron scattering user program.
These achievements demonstrate the importance and impact of the MLF. Scientific productivity, as
measured by publications in scientific journals, is growing. Most notable is the impact of work by
Sumitomo Rubber, that was announced 1 at the Tokyo Motor Show, on “Advanced 4D Nano Design”. On
the basic-science side, there was a Science Advances article in 2015 on the Newton’s Cradle protein relay
mechanism, from iBIX and a Nature Communications article on skyrmions from the TAIKAN small-anglescattering machine.

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http://www.srigroup.co.jp/english/news/2015/2015_130.html

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On the technical side we congratulate the J-PARC team on extending the detector coverage on both
4SEASONS and TAIKAN, and efforts to get full detector coverage on all instruments should continue.
However, the MLF scientific productivity could be much better, and it is clear that the neutron scattering
instruments have not yet reached their full potential and impact. There are several factors that
contribute to scientific productivity including source and instrument capability and performance,
staffing levels and expertise, software for data collection, visualization and analysis, sample
environment and a broad and vibrant external user community, but it is not clear which factors arelimiting scientific productivity at present.
The main issue is that J-PARC only supplied neutrons for around 30 days per year in 2015. It will be very
difficult to compete with other facilities that operate for users up to 250 days per year. The IAC urges
the J-PARC management to increase the reliability of supply of neutrons from the source. This is far
more important than increasing the power of the source from 200 kW to 1 MW.
A secondary issue is whether J-PARC has yet made the cultural change from a construction project to a
fully functioning user facility with a strong focus on science. The IAC’s suspicion is that it has not, andthat stronger scientific leadership is needed from within the J-PARC team. Of course this must be donein coordination with the Japanese user community.
The construction of new innovative instruments at the MLF has proceeded at an impressive pace andthese instruments have the potential to form a world class suite. There are numerous ongoing activities
to continue to improve these instruments toward their full potential. However, it is not clear that thisvery broad and diffuse approach is the most efficient or effective approach. There is a lack of a coherent
strategic science plan which sets out the scientific agenda of MLF and defines a set of prioritized
instrument upgrades.
The IAC also suspects that the J-PARC instruments are understaffed, by international standards. It
appears from the J-PARC website that there are uniformly 2 scientists per instrument, with a variety ofaffiliations, but more than 50% from JAEA. Some of these clearly have other responsibilities inmanagement, data management and so on. The IAC recommends that J-PARC benchmark its front-line
instrument scientist staffing against other facilities, instrument by instrument. An average of 3 scientists
per instrument is probably more appropriate, with significantly more focussed on the high throughput
beamlines. It was not clear whether the priority for staff is to serve and collaborate with external users,
or to drive the internal research programs of KEK and JAEA. International experience is that it is very
important for management to make its emphasis clear. If J-PARC wants to extend its user base beyond
physics and materials science, its instrument scientists will have to be involved more strongly in all
aspects of producing science from the facility, right down to data analysis and writing papers. The IAC
was not convinced by the discussion of data analysis, which seemed to imply that analysis was the
responsibility of the users. International experience is that this may work for expert groups in wellestablished areas of science, but that it does not for new users, especially in emerging areas like soft
matter, cultural heritage, some engineering applications, earth science, biology and so on. A lot more
“hand holding” may be required if the user base is to be extended beyond condensed-matter physics
and materials science.
Recommendations
There is a need to develop a Strategic Science Plan addressing the emerging Grand Challenges that canbe tackled by the MLF. To optimize this plan, MLF management should seek help from the external user
community.
12Determine what the potential productivity could be for each instrument if all of the above factors are
optimal e.g. how many papers could each instrument produce? This could be done by bench marking
current instrument productivity against the productivity of similar instruments at other leading neutron
scattering facilities. Instruments should also be audited to identify areas of underperformance. These
two activities will allow management to identify specific areas for instrument improvement that will
most effectively and efficiently accelerate increases in scientific productivity. Care should be taken to
ensure that the ratio of external to internal users is healthy.
Management should engage the broader research community to identify the most important scientificneeds. The instrument improvements required to meet these needs should be sequentially focused on asmall number of instruments, with the sequence of instruments prioritized according to the mostpressing scientific needs.
The present heterogeneous J-PARC organizational structure and multiple funding sources is complex. It
may also be confusing to potential users. Strong management will be required to coordinate thesedifferent elements in order to translate a strategic science plan for MLF into a coherent set of prioritize
actions that maximize scientific productivity and impact. A consolidated or unified user community witha single voice and a single communication channel to MLF management may help to avoid confusion
and to provide a coordinated response to user needs.
MUSE
In the absence of steady beam operation due the MLF target problems, the MUSE facility personnel
have advanced the facility construction along the lines of the master plan. The beam quality – focusing –of the D line has been significantly improved, S1 line is now ready to deliver beams to two stations, andthe first ultra-slow muon beam has been delivered from the U line. The H-line is well defined and readyto be constructed. It also is attracting the interest of users for its re-accelerated muon beams which
could provide new and unique capabilities.
But the user program suffered greatly as a result of this year’s operational losses.
The IAC is impressed by the way the muon group has used the time to improve the facility in many areas,
which will benefit the user programme in the long term.
The shortage of manpower continues to be a concern. This matter has been highlighted for several years,
but a solution is still not forthcoming. This will become critical in the near future when the U and S lines
begin regular operation.
Even the limited scientific highlights demonstrate the potential of the MUSE beamlines across a wide
spectrum of applications, but sustained and reliable operation is essential to engage and expand thepotential user community. The reduced MLF power due to the limitation of the spare MLF neutron
target is not an issue in the short to medium term.
Recommendation:• With the successful commissioning of three of the four main secondary beamlines (D, S, U), theMUSE group should focus on the delivery good science from these beamlines and on the urgent
construction of the H line for the fundamental g-2 experiment to remain competitive and for otherpotential unique applications of reaccelerated muon beams.
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NUCLEAR TRANSMUTATIONThe report of Dr. Fujio Maekawa, deputy head of the Nuclear Transmutation Division of J-PARC,
described the progress accomplished on the TEF design and the associated R&D support program. The
IAC acknowledges the prompt actions J-PARC has taken in response to the 2015 recommendations andcommends management for the remarkable increase of manpower for this program.
The IAC acknowledges the enhanced importance of ADS activity within J-PARC through the creation of
the Nuclear Transmutation Division reporting to the J-PARC director.
Recommendations
Taking into account the International review by T-TAC of the TEF-T and TEF-P designs and safety
approach, the IAC recommends:• To continue the support R&D needed to secure the TEF construction (for prioritization consider infirst instance the realization of TEF-T and refer to the T-TAC report of Oct. 2015 Meeting).
• To make a full effort to get approval from the government for the construction of TEF facility within
J-PARC, by concentrating on the TEF-T that is of value in the international scene of Accelerator
Driven Systems and material testing.
• To give a high priority for starting up the TEF-T, which is less complex in terms of licensing than the
TEF-P.
• To evaluate carefully the usefulness of TEF-P loaded with Minor Actinide-based fuel in terms of thesafety assurance in particular with the vision to make the J-PARC an open campus for the public,
and in terms of an international perspective by considering other facilities that could be moresuitable for this work.
INSTITUTIONAL SUPPORT BY KEK AND JAEAThe IAC heard from M. Yamauchi, director of KEK, and from Y. Muira, executive director of JAEA
regarding the commitment of the two parent institutions and the foreseen role of J-PARC in theirrespective scientific road maps.
Support for the J-PARC project is one of the major missions of KEK. That part of the KEK program is being
prioritized in the context of the program implementation plan (KPIP) which is reviewing all KEK activities.
KEK will work together with JAEA for the safe operation of the J-PARC and for enhancement of itsscience potentials. With J-PARC, KEK intends to contribute to world-wide science communities, toimpact to society, and to foster the next generations of researchers and engineers. While the KEK’s
budget has received some 12% increase, it barely compensates for the increase in power cost and a tightsituation remains regarding the number of beam cycles that can be funded for the MR operation.
Much has changed in the JAEA perspective following the Fukushima accident and the MONJU reactor
failure to restart. JAEA is restructuring to meet the new national requirements in terms of nuclear power
safety, fuel handling and nuclear facilities decommissioning. Some of the fusion research and more
fundamental materials research using quantum beams are being transferred to a new institution.
Overall the budget of JAEA is being squeezed but JAEA remains committed to supporting J-PARC andprovided for 7 cycles of operation funding while increasing its commitment to the transmutation
program.
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MEXT view of J-PARC
S. Hagiwara outlined the expectation of his ministry regarding J-PARC and focused his presentation on
the delivery milestones for J-PARC as expected by MEXT. As a user facility, J-PARC needs to attract users
by providing them with unique facilities and a stable, predictable and sustainable beam delivery. This isechoing the key recommendation the IAC is making this time regarding improving the reliability of thewhole beam delivery systems. But MEXT is also aware that to stay at the leading hedge of researchestablishments in the world, sequential upgrades will be required from time to time and that a goodbalance between “static” high quality operation and “dynamic” evolvement is key to the success of JPARC.
The IAC endorses these views and appreciates that MEXT is recognizing the potential of this great facility.
The IAC confirms its recommendation to give higher priority to reliability and availability of the facility as
whole at this time.

Conclusions
The IAC is pleased with the demonstration that the accelerators will meet design goals soon and agrees
with ATAC that the efforts should now include solving the reliability issues of the beam transport andtargets. It recommends establishing beam delivery milestones to guide the effort across the full J-PARC
personnel and solidify the production of excellent science across the various experimental areas.
The mission of the laboratory is to deliver science and safe and reliable beam delivery is a necessary
condition for attracting users at a facility like J-PARC. The IAC is pleased that J-PARC’s management has
placed safety as one of the top consideration for its mode of operation and recommends further
strengthening of the safety culture across the laboratory. The evaluation of the laboratory performance
will be more and more judged on the scientific achievements of its user community and the relevance of
its activities to society. The IAC notes the constant effort of the parent organisations to provide
resources for J-PARC in a climate of tight fiscal realities and salutes the interest and support of the Tokai
village as indicated by the presence of its mayor at the reception.
The IAC notes that J-PARC should pay more attention to involving women in all aspects of its operation
and regrets that no presentations were given by women, no women attendees were present in theaudience and there is no longer women representation on the IAC. There must be a top down effort bymanagement to increase participation of women in science at all levels. As an aside, it would be
impossible to attract IUPAP support for activities where women representation is deemed insufficient.
The IAC members thank Director N. Saito and all the presenters for providing a detailed view of thelaboratory and outlining the successes and challenges they are facing. The IAC thanks the support staff
for making all the very effective arrangements for the meeting.
The IAC hopes that its evaluation will be helpful in shaping an attractive science program at J-PARC.

15

Appendix I
Agenda for the International Advisory Committee Meeting of J-PARC in 2016
Date: February 29 (Mon) and March 1 (Tue), 2016
Place: J-PARC Research Building

Draft v4

February 29 (Mon)
Executive Session
8:45 9:00 (

10 +

5)

Charge to the Committee

Naohito SAITOOpening
9:00 9:40 -9:40 (
10:10 (

30 + 10 )20 + 10 )Report from the Director
Safety at J-PARC

Naohito SAITO
Tetsuro ISHII

10:10 -

10:25 (

15)

Coffee

15 +
15 +

5)
5)

Accelerator
10:25 - 10:45 (10:45 - 11:05 (Material and Life Science I
11:05 - 11:45 ( 30 + 10 )11:45 - 12:25 ( 30 + 10 )12:25 -

13:25 (

60)

Progress and Prospects
A-TAC View of Accelerator Activities

Overview of Neutron Facility
Neutron Instruments, Operations & Science at
MLF

MUSE Status and MAC Review

Particle and Nuclear Physics I
14:05 - 14:20 ( 10 + 5 )14:20 - 14:35 ( 10 + 5 )Overview of Particle and Nuclear Physics
Hadron beam resumption

14:50 (

15)

Toshiji KANAYA
Kenji NAKAJIMA

Lunch

Material and Life Science II
13:25 - 14:05 ( 30 + 10 )14:35 -

Kazuo HASEGAWA
Thomas ROSER

Yasuhiro MIYAKE

Takashi KOBAYASHI
Hitoshi TAKAHASHI

CoffeeParticle and Nuclear Physics II
14:50 - 15:15 ( 20 + 5 )15:15 - 15:40 ( 20 + 5 )15:40 - 16:00 ( 15 + 5 )16:00 - 16:20 ( 15 + 5 )Nuclear physics program
Neutrino physics
Kaon physics
Muon program

Hirokazu TAMURA
Takeshi NAKADAIRA
Taku YAMANAKA
Tsutomu MIBE

Executive Session (closed)
16:20 - 17:45 ( 85)

Review and Discussion

IAC Members)

Group Photo

17:45 -

17:50 (

5

Views from Funding Agency and Host Institutes
17:50 - 18:10 ( 15 + 5 ) J-PARC: A View from MEXT
18:10 - 18:30 ( 15 + 5 ) KEK and J-PARC
18:30 - 18:50 ( 15 + 5 ) JAEA and J-PARC
Banquet19:00 -

21:00 ( 120)

Sadahiro HAGIWARA
Masanori YAMAUCHI
Yukitoshi MIURA

BanquetMarch 1 (Tue)
Accelerator Driven Transmutation Research
9:00 9:40 ( 30 + 10 ) ADS Project
Executive Session (closed)
9:40 - 11:30 ( 110)

Review and Discussion, Drafting

Close out
11:30 -

12:00 ()

Recommendations

12:00 -

13:30

30

Fujio MAEKAWA

IAC Members

Jean-Michel POUTISSOU

Lunch

16

Appendix II
IAC Committee members for 201617

Appendix III
Charges to IAC2016 from J-PARC by N. Saito, director

•

•

•
•
•

Evaluate overall performance of J-PARC Center– In promotion of science with safety– Any suggestions and additions to all AC’s recommendations in view of total
performance of J-PARC are welcome
Review the safety activities– Any improvements are visible?
– Safety culture is being well penetrated thru staff and users?
More uniform operation combining KEK, JAEA, and CROSS efforts is a critical issue. Anysuggestions for improvements are welcome
Review of J-PARC organization is in preparation : any inputs are welcome
Any suggestions to improve the total performance of J-PARC

18