JPARC

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J-PARC
Pinghan Chu
University of Illinois at Urbana-Champaign ACC
2007 Summer

• J-PARC Facility
• Physics motivations for J-PARC

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The High Intensity Frontier

• J-PARC aims for the high intensity frontier for
• - materials/life sciences (3GeV)
• - nuclear/particle physics (50GeV)
• High intensity proton beam leads to high
  intensity secondary (neutron, kaon, muon,
  neutrino) beam.

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J-PARC Facility
J-PARC Japan Proton Accelerator Research Complex
Joint Project between KEK and JAEA
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Location of J-PARC at Tokai
295 km
JAEA
Tokai
1 hour
Tsukuba
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Phase 1 and Phase 2
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Beam Performance

• Beam Energy 50 GeV
• Linac Energy 400 MeV
• Repetition 3.45-6 Sec
• Flat Top Width 0.72-3 Sec
• Beam Intensity 3.3x1014ppp, 16uA
• Beam Power 750 kW

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Goals of J-PARC
High intensity proton beam leads to high
intensity secondary (neutron, kaon, muon,
neutrino) beam.
Radioactive Nuclei
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3. ?????????
Materials and Life Experimental Facility
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Materials Life Experimental Facility
Neutron Scattering Area
Muon Experimental Area
Proton Beam
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295 km West
Super Kamiokande
Neutrino Experimental Facility
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T2K Experiment
Intense neutrino beam by 100 times at KEK 12 GeV
PS
T2K Tokai to Kamioka
Muon neutrino beam
J-PARC
(Tokai)
(Kamioka)
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From K2K to T2K
Data since 1999
K2K KEK to Kamioka
Without oscillation
With oscillation
107 events observed (151 events expected without
any oscillations) ? 99.99 confident that n
carries a finite mass.
Best fit
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Hadron Experimental Facility
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Hadron Experimental Hall (Phase 1)
Experimental Area
Test Beam
A-Line
Beam Dump
(on the guide rail for Phase 2)
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Beamline

• K1.8 beamline High quality kano beamline (1.8
  GeV/c), for hypernuclear study, especially of
  S-2 systems, using (p,K),(K,p),and (K,K)
  reactions.
• K1.1/K0.8 beamline High quality kaon beamline
  with lower momenta. Suitable for stopped kaon
  experiments as well as K decay experiments, etc.
• K0 beamline Specifically designed for

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Summary

• J-PARC will be the highest intensity accelerator
  complex of the GeV and ten-GeV energy regions in
  the world.
• The major aims are materials/life sciences by
  RCS(3GeV), nuclear and particle physics by MR (50
  GeV) and RD for nuclear transmutation technology
  by Linac (600 MeV).
• This is a wide variety of physics possibilities,
  including hadron physics -- Drell-Yan and
  quarkonium production, vector mesons, neutrino
  beam, etc.