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J-PARC and Dimuon Experiments

J-PARC and Dimuon Experiments. Shin’ya Sawada KEK (High Energy Accelerator Research Organization, Japan). J-PARC Facility. The budget for about 2/3 of the entire project has been approved by the Japanese government from JFY2001 as Phase 1 .

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J-PARC and Dimuon Experiments

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  1. J-PARC and Dimuon Experiments Shin’ya Sawada KEK (High Energy Accelerator Research Organization, Japan) Shin'ya Sawada @ Fermilab E906

  2. J-PARC Facility • The budget for about 2/3 of the entire project has been approved by the Japanese government from JFY2001 as Phase 1. • Phase 1 (~151 billion Yen) consists of major accelerator components and a part of experimental facilities. Shin'ya Sawada @ Fermilab E906

  3. ＬＩＮＡＣ RCS n ＭＬＦ 50GeV-PS Hd Shin'ya Sawada @ Fermilab E906 Bird’s eye photo in Feb. 2008

  4. Materials & Life Experimental Hall Neutrino Target Area 3 GeV Linac Hadron Experimental Hall Shin'ya Sawada @ Fermilab E906

  5. Acceleration and Extraction at 3 GeV 2007.10.31.14h03m23s 500ns Beam Current inside the Ring Beams remain inside the ring for 20 ms. Current Beam Loss Time 3NBT Beam Current （Extracted Beams) Magnetic Field 3GeV Current 20 ms Injection at the minimum field and the extraction at the maximum field Beam Current Detected at 3NBT Time 181MeV Successful Acceleration and Extraction !!! Acceleration Shin'ya Sawada @ Fermilab E906 Injection Extraction

  6. Shin'ya Sawada @ Fermilab E906

  7. Shin'ya Sawada @ Fermilab E906

  8. Performance of the 50-GeV PS Numbers in red are design values. • Beam Energy： 50ＧｅＶ ELinac = 400MeV (30GeV for Slow Beam) ELinac = (180MeV) (30GeV for Fast Beam) • Repetition: 3.4 ~ 5-6s • Flat Top Width： 0.7 ~ 2-3s • Beam Intensity: 3.3x1014ppp, 15mA (2×1014ppp, 9mA) • Beam Power: 750kW (270kW) Numbers in parentheses are ones for the beginning of Phase 1. Energy recovery of the linac to 400 MeV is planned just after the completion of the Phase-1 construction in 2009. Shin'ya Sawada @ Fermilab E906

  9. Slow Extraction Beamline (Phase 1) NP-HALL 56m(L)×60m(W) 50-GeV PS A-Line Switch Yard Split Point 2% Loss T1 Target 30% Loss T0 Target 0.5% Loss Beam Dump 750kW Plan to extend the hall downstream (~50m) in the Phase 2. Shin'ya Sawada @ Fermilab E906

  10. Hadron Hall July 2007 コンクリート躯体の中には鉄遮蔽体が埋め込まれています Shin'ya Sawada @ Fermilab E906

  11. Beamlines at the Hadron Hall Shin'ya Sawada @ Fermilab E906

  12. Hadron Hall Today Shin'ya Sawada @ Fermilab E906

  13. Hadron Experimental Hall (Phase I) A-Line Beam Dump Extension in Phase II Shin'ya Sawada @ Fermilab E906 56 m

  14. Oct. Dec. Shin'ya Sawada @ Fermilab E906 Neutrino

  15. Important Schedule • May-June, 2008: Beam injection to the 50-GeV synchrotron and trial of beam capture • Summer, 2008: Installation of slow extraction equipments • December 2008: Acceleration up to 30 GeV and the first slow extraction to the Hadron facility • December, 2008 – February, 2009: First experiments using slow extracted proton beam at K1.8BR • April, 2009: First neutrino production Shin'ya Sawada @ Fermilab E906

  16. Results of the 4th PAC (Jan 2008) Shin'ya Sawada @ Fermilab E906 16

  17. Measurement of High-Mass dimuon Production at J-PARC (P-04) Collaboration Abilene Christian University, Argonne National Laboratory, Duke University, High Energy Accelerator Research Organization, University of Illinois at Urbana-Champaign, Kyoto University, Los Alamos National Laboratory, Pusan National University, RIKEN, Seoul National University, Tokyo Institute of Technology, Tokyo University of Science, Yamagata University Collaboration members J.K. Ahn, J. Chiba, Seonho Choi, D. Dutta, H. Gao, Y. Goto, L.D. Isenhower, T. Iwata, S. Kato,M.J. Leitch, M.X. Liu, P.L. McGaughey, J.C. Peng, P. Reimer, M. Sadler, N. Saito, S. Sawada,T.-A. Shibata, K.H. Tanaka, R. Towell, H.Y. Yoshida (Spokesperson: S. Sawada and J. C. Peng) Shin'ya Sawada @ Fermilab E906

  18. (A part of) Physics with Dimuon Measuremet at J-PARC Shin'ya Sawada @ Fermilab E906

  19. dbar/ubar at larger x Shin'ya Sawada @ Fermilab E906

  20. PAC Message on P04 Shin'ya Sawada @ Fermilab E906

  21. Prospect and Relation with E906 • Major equipments of E906 will be shipped to J-PARC after E906, in 2012? • Radiation especially of M1 be OK? Core part of the beam dump can be built as a separate module? • Beamline for P04 has not been funded, and we continue to make efforts. • The beam energy would be 30 GeV at the beginning of the J-PARC experiments. • Physics cases even after E906 should be more emphasized, such as spin related measurements even without polarized beam and/or target. • Discussion on responsibilitiesof P04 and modified P24 would be important. Shin'ya Sawada @ Fermilab E906

  22. Polarized Proton Acceleration at J-PARC (P24) Shin'ya Sawada @ Fermilab E906

  23. Status of P24 • PAC • No decision yet. • “Although the PAC recognizes that polarized beam acceleration in the MR can be one of the future options in J-PARC, judgement of the technical feasibility of this proposal is beyond the present PAC’s scope” • “The PAC would like to hear a separate proposal with more specific discussion of the physics and proposed measurements” • Revised P24 (or another number), with physics emphasis, will be submitted to the next PAC meeting (October 2008). Shin'ya Sawada @ Fermilab E906

  24. Hadron hall Users’ Association • Hadron hall Users’ Association = HUA = was founded in March, 2007. • Now the Chair of HUA is a member of J-PARC Users Steering Committee • Send email to hua-sec@rcnp.osaka-u.ac.jp to join. Shin'ya Sawada @ Fermilab E906

  25. Users Steering Committee New members were elected in November of 2007. Representatives from four communities are included. Roadmap of the future J-PARC will be discussed at this committee. Discussion items by this committee were re-identified. The committee will start intense discussions from February about future plans of the J-PARC. Phase 2 for J-PARC will be discussed first at this Committee Shin'ya Sawada @ Fermilab E906

  26. Summary • J-PARC has achieved 3-GeV beams at RCS and the 50-GeV synchrotron already. • The first 30-GeV slow extracted beam is expected around the end of this year. • Our proposals, P04 for unpol. dimuon measurement and P24 for pol. proton acceleration with experiments, are “deferred”. • HUA has been founded. Your participation is very much welcome. Shin'ya Sawada @ Fermilab E906

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