PS Review, KEK
June 8, 2004

J-PARC Status
Shoji Nagamiya
J-PARC Project Director

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J-PARC Facility
Materials and Life Science
Experimental Facility

Nuclear and Particle
Experimental Facility

Nuclear
Transmutation

Neutrino toKamiokande

Linac(350m)

3 GeV Synchrotron(25 Hz, 1MW)

50 GeV Synchrotron(0.75 MW)

J-PARC = Japan Proton Accelerator Research Complex2

Three Goals at this Facility

・Materials & Life Sciences at 3 GeV
・Nuclear & Particle Physics at 50 GeV・R&D toward Transmutation at 0.6 GeV
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Nuclear and Particle Physics– High resolution spectroscopy

for S = -1 hypernuclei– S = -2 hypernuclei

ρ, ω, φ, J/Ψ, etc.
(+ π, K, σ, etc.)

Neutrino measurement atSuperKamiokande

4Pion Implantation

Inside nuclear
matter thepion mass is
reduced by20%.
K. Suzuki, et al., Phys. Rev. Lett. 92, 072302 (2004)
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Strange Meson Implantation
K- + 3He → “K-ppn” + n

Experiment by M. Iwasaki, et al.

Theory by Y. Akaishi, et al.

Nuclear shrinkage is also observed in Λ implantation inside the nucleus ← K. Tanida, et al.6

From K2K to T2K
K2K = KEK to Kamioka

T2K = Tokai to Kamioka(not yet an official name)

Data since 1999
No oscillation (expected)= 80.1 + 6.2 – 5.4
Observed= 56
Best fit

Best fit:sin22θ=1.0
Δm2 =2.8x10-3eV2Flux (νµ) at J-PARC 50 GeV PS> 100 x Flux (νµ) at KEK 12 GeV PS
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Materials and Life Science
Water molecules

The neutron has a magnetic moment

observed withwhich enebles us to measure magnetic

neutrons

structure of materials.

From structure to function
タンパク質DNAA proten
Structure of amoleculesuperconductive

moving along

material studied

the DNA chainwith neutrons
Neutrons are scattered by nuclei, in particular, by light-mass nuclei. The configurationof water molecules within a protein can be studied sensitively with neutrons. With highintensity neutrons, the function of a protein along the DNA chain can be studied.

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JSNS

23 neutron beamlines

9R&D Towards Nuclear Transmutation

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Recent Events

Negotiation for JYF2004 Budget with MEXT (our funding agency),
August, 2003
– One year stretch. Agreement to include the neutrino project in Phase 1.

Review by the Council of Science and Technology Policy (CSTP)– All budget requests from MEXT to Ministry of Finance are subject to thereview of CSTP.
– CSTP ranked Phase 1 project to “A” (and the building construction to “S”)
whereas the neutrino project to “C”. (S=Superior, A=Very Good, B=OK,C=Poor).

Interim Review of the Project was held in November, 2003
– Four meetings on Nov. 7, 14, 21 and 27.
– Major recommendations: Neutrino program must start immediately. Theenergy recovery of Linac to 400 MeV must be done immediately after theinstallation of 200 MeV Linac.
– Finally, both CSTP and the Ministry of Finance agreed to theserecommendations.

Announcement in Late December, 2003
– Neutrino project approved for construction (total = 16.0 BYen, 5 years).
– Approval of the neutron beam line design outside the J-PARC budget.

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Budget Profile (before the Summer, 2003)

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Expected Beam Power

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Phase 1 and Phase 2 (as of today)– Phase 1 + Phase 2 = 189 billion Yen (= $1.89 billion if $1 = 100 Yen).
– Phase 1 = 151 billion Yen for 7 years.
– Construction budget does not include salaries.

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Construction Schedule15

Budget Profile

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Purchase Commitment

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Budget and Personnel at JAERI

2003

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Organization for Construction
JAERI President
T. Okazaki

KEK Director
Y. Totsuka

Steering Committee
A. Koma & S. Tanaka

Project Headquarters
Director: S. Nagamiya
Deputy Director: Y. Oyama

International Advisory Committee(J. White)

User Consultative Committee(TBN)
Neutron Instruments Planning Committee(K. Yamada)

Accelerator TAC(S. Holmes)

Comm. for Muon Science Experimental Facilities(J.-M. Poutissou)

Neutron Source TAC(G. Bauer)Comm. for Nuclear and Particle Physics Experimental Facilities(T. Yamanaka)
Neutrino TAC(E. Blackmore)

Coordination
K. Suzuki
M. Takasaki

Matrerials andLife sciences
Y. Ikeda

Transmutation
Experiments
H. Oigawa

Radiation Safety
H. Nakasima
T. Shibata

Accelerator

Nuclear Particle
Physics Experiment
J. Imazato

Facility and Building
H. Naruse
T. Matsunaga

Administration
S. Takagi
T. Sawada

Y. Kamiya

Project TeamControl
T. Kato19

Preliminary Letters of Intent for 50 GeVAnnounce of LoI call : July 2002
Thirty LoI’s were submitted by early 2003
– Strangeness nuclear physics– Nuclear/hadron physics– Kaon decay physics– Muon physics– Neutrino physics– Future facilities

774318478 physicists with 2/3 from outside
Japan. Asian participation is still few.
 Committee meetings:

Nuclear/Particle Facility LOI Authors
Total #= 478

EuropeJapan

North America– March 22, 2003
– June 26-28, 2003
Asia

The real proposals:– Most likely, the call for the proposal will be made within this year.

20LinacInside ofDrift Tube
LinacRFQ
Beam test forchopper wasalso done.

On October 30, 2003,a successful acceleration of 6 mA
at 20 MeV. On November 7, 30 mA was achieved.

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3 GeV Vacuum Pipe and 50 GeV RF Cavity
Vacuum Beam
Pipe for 3 GeV
For dipole

For quadrupole

New material(Finemet)
50 kV/mAttained.

RF Cavity for 50 GeV

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50 GeV Magnets

Dipole Magnet

Quadrupole
Magnet23

Ground Breaking Ceremony
June, 200224

Linac Area

Linac Area in March
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Linac Area
Linac Area Now

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February, 2002

February, 2003

September, 2003

January, 200427

3 GeV Area

3 GeV Area in March28

3 GeV Area
3 GeV Area Now

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IAC, March, 20043050 GeV
50 GeV Area

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Ancient Salt Farm

February, 200432

Remains of Ancient Salt Farms

Water Pan

Boiling Farm

Studies by Local
School Kids
Most likely at aroundthe15th Century

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Coins, Potteries, Human Bodies, etc.

34SummaryUniqueness of the Project - Multipurpose Facility– Variety of secondary beams + Variety of frontier sciences.

International Research Center
Present Status– Construction for both equipments and facilities: Almost on schedule.
– Budget: Slower budget than we anticipated. One year delay of thecompletion is expected at this moment (= 7 year project instead of 6).
– Ancient salt farms: Archeological studies must be done. No major impact
on the schedule as compared to the delay in budget profile.

Recent Review– Neutrino program from JFY2004 was approved.
– Initiation fund for the neutron beam lines will be added in 2004 at JAERI.

Issues– Timely completion of the construction, Budget for experimental facilities,
Operational budget, Linac energy recovery, Organizational structure at theoperational stage, Mechanism to reflect users’voice, Beamtime charge, etc.

First Example of the Joint Project between the Past Two Agencies,Monbu-sho and STA.

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