J-PARC
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J-PARC (Japan Proton Accelerator Research Complex) aims to serve as a high-intensity accelerator facility for materials and life sciences at 3 GeV and nuclear/particle physics at 50 GeV, enhancing secondary beams of neutrons, kaons, muons, and neutrinos. The facility includes various experimental areas with specific beamlines for hadron physics, muon studies, and neutrino experiments, significantly increasing intensity and precision of measurements. By 2009, J-PARC is expected to have fully operational high-intensity beams, broadening research possibilities in multiple physics domains.
J-PARC
- 1. J-PARC Pinghan Chu University of Illinois at Urbana-Champaign ACC 2007 Summer J-PARC Facility Physics motivations for J-PARC
- 2. 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. Neutron: from 0.16MW(ISIS) to 1MW K meson: 5 to 10 times more intense than BNL-AGS
- 3. J-PARC Facility J-PARC = Japan Proton Accelerator Research Complex Joint Project between KEK and JAEA Nuclear Transmutation 3 GeV Synchrotron (25 Hz, 1MW) Hadron Beam Facility Materials and Life Science Experimental Facility Neutrino to Kamiokande 50 GeV Synchrotron (0.75 MW) 500 m Linac (330m)
- 4. Tsukuba Tokai 1 hour 295 km JAEA Location of J-PARC at Tokai
- 5. Phase 1 and Phase 2 JAEA Portion KEK Portion
- 6. Beam Performance MR Beam Energy = 50 GeV RCS Beam Energy = 3 GeV Linac Energy = 400 MeV to RCS 600 MeV to ADS Repetition = 3.4~5-6 Sec Flat Top Width = 0.7~2-3 Sec Beam Intensity = 3.3x10 14 ppp, 16uA Beam Power = 750 kW
- 7. Goals of J-PARC High intensity proton beam leads to high intensity secondary (neutron, kaon, muon, neutrino) beam. Radioactive Nuclei Nuclear & Particle Physics at 50 GeV Materials & Life Sciences at 3 GeV R&D toward Transmutation at 0.6 GeV
- 8. Materials and Life Experimental Facility ３ . 研究課題と研究施設
- 9. Muon Experimental Area Neutron Scattering Area Materials & Life Experimental Facility Proton Beam Experimental Devices Neutron Beam Lines (23 total) Neutron Beam Lines (23 total) Target Station Scattered Neutrons Proton Beam Number of Users : about 3,000
- 10. Neutrino Experimental Facility 295 km West Super Kamiokande
- 11. T2K Experiment Muon neutrino beam J-PARC Intense neutrino beam by 100 times at KEK 12 GeV PS T2K = Tokai to Kamioka (Tokai ) (Kamioka) Detection of at Super Kamiokande Totally new experiment Change to Disappearance of High Statistics T2K （ Five year data at KEK-PS can be measured within a few weeks at J-PARC ） Change to
- 12. From K2K to T2K Best fit With oscillation Without oscillation Data since 1999 K2K = KEK to Kamioka 107 events observed (151 events expected without any oscillations) 99.99% confident that carries a finite mass. T2K = Tokai to Kamioka (not yet an official name) Flux ( ) at J-PARC 50 GeV PS > 100 x Flux ( ) at KEK 12 GeV PS
- 13. Hadron Experimental Facility Number of Users : about 600
- 14. Beam Dump A-Line Hadron Experimental Hall (Phase 1) Experimental Area Test Beam (on the guide rail for Phase 2)
- 15. Beamline K1.8 beamline: High quality kano beamline (1.8 GeV/c), for hypernuclear study, especially of S=-2 systems, using ( Pi , K ),( K , Pi ),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
- 16. Hadron Physics: Sea Quark at Large X_bj Proton beams + hydrogen/deuterium/A target + dimuon(Drell-Yan process) spectrometer dbar/ubar(flavor asymmetry) at large x antiquark PDF in A PDF in large x Drell-Yan and J/Psi with polarized beam Direct investigation of quark-gluon multibody system
- 17. Beam Commissioning of the Accelerators Dec. 2006: Beam commissioning of the Linac was started. Jan. 24, 2007: The Linac accelerated 181 MeV=Design Energy protons with 0.25uA current(Gaol is 200uA) May, 2007: Beam commissioning of the 3 GeV RCS was started. May, 2008: Beam commissioning of the 50 GeV MR will be started.
- 18. Schedule of 50 GeV Facilities May-Jun, 2008: Fist beam commissioning of the 50 GeV accelerator. Jun-Oct, 2008: Installation of slow extraction equipments (ES septum, septum magnets, etc. and the rest of neutrino beamline equipments.) Dec, 2008-Mar, 2009: First extraction to the Hadron facility with slow extraction. Apr, 2009: First extraction to the neutrino beamline with fast extration.
- 19. 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 R&D for nuclear transmutation technology by Linac (600 MeV). This is a wide variety of physics possibilities, including, hypernuclei , hadron physics -- Drell-Yan and quarkonium production , vector mesons , neutrino beam , etc.