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Japanese activities in LHC

Japanese activities in LHC. Takahiko Kondo, KEK May 12, 2007 The KEK-CNRS/IN2P3-CEA/DSM/DAPNIA Collaboration Meeting at KEK. LHC internationalization. 1994.12 CERN Council approved LHC in 2 steps 1995.5 Japan : 5 BYen (65 MCHF). 1996.3 India : $ 12.5M.

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Japanese activities in LHC

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  1. Japanese activities in LHC Takahiko Kondo, KEK May 12, 2007 The KEK-CNRS/IN2P3-CEA/DSM/DAPNIA Collaboration Meeting at KEK

  2. LHC internationalization 1994.12 CERN Council approved LHC in 2 steps 1995.5Japan : 5 BYen (65 MCHF). 1996.3 India : $ 12.5M. 1996.6 Russia : 67MCHF (incl. detectors). 1996. Canada : Canadian$ 30M. 1996.12Japan : 3.85 BYen (44 MCHF). 1996.12 CERN Council approved LHC in 1-step. 1997.12 US : $200M (accelerator) + $331M (detectors). 1998.5Japan : 5 BYen (56 MCHF). 2002.6 LHC completion changed to 2007.

  3. Minister Kaoru Yosano CERN DG Chris Lewellyn Smith Dharuma doll 23 June 1995 Minister of Monbusho announced the contribution of 5 BYen (65 MCHF) for the construction of LHC at the CERN Council. Japan becomes a CERN’s observer state for LHC.

  4. Superconducting Quadrupoles for LHC IPs Design and construction done by KEK with Toshiba B gradient : 215 T/m Length : 6.5 m Aperture : 70 mm Higher multipoles < 10-4 Coil winding at Toshiba Cross section Quench history Excitation test at KEK Technique developed is applied for the magnets of the J-PARC n beam line.

  5. In-kind contribution to LHC Construction • KEK constructed 20 low-b superconducting quadrupole magnets for LHC IPs. Already installed in the LHC tunnel KEK KEK Fermilab

  6. March 27, 2007: Test Failure of Quad magnets at P 5 During the pressure test, the Q1 magnet moved by 13 cm due to the asymmetric forces and broke various components. It was caused by design mistake of the spider support. Fermilab and CERN (and KEK) are working tightly for repairing the magnet supports.

  7. ATLAS Collaboration 34 Countries 151 Institutions ~1300 Scientific Authors 15 institutes from Japan ~ 60 physicists KEK, Tsukuba, Tokyo ICEPP, Tokyo MU, Shinshu, Nagoya, Ritsumeikan, Kyoto, Kyoto UE, Osaka, Kobe, Okayama, Hiroshima, Hiroshima IT, Nagasaki IAS

  8. ATLAS Central Solenoid : 100% by KEK Coil at Toshiba (1999) into LAr Cryostat (Feb. 2004) Down to the pit (Oct. 2004) 7980 A 7730 A2.00 T slow dump Full excitation was achieved in the final position (Aug. 1 2006)

  9. Thin Gap Chambers (TGC) for muon endcap triggering Japan made 1200 TGC chambers out of 3600. Almost all electronics are design and constructed by Japan. KEK and Kobe 72 sectors assembled at CERN B180 Big wheel in the pit transportation

  10. ATLAS Silicon Micro-strip Detector (SCT) Hamamatsu Seiko Precision 4 sensors/module Japan Mektron KEK assembled 980 modules (40%) Module mounting at Oxford U. using robots made by KEK Excellent noise distribution obtained during SR1 cosmic-ray test Cosmic-ray tracks at SR1 (May 2006)

  11. Grid system for LHC Strasbourg Ile de France Nantes Clermont-Ferrand Annecy Lyon Tier-1: CC-IN2P3 Marseille Tier-2 Center for ATLAS at ICEPP of Univ. of Tokyo with strong linkage to Lyon Tier-1 Center. Tape Robot PC Servers Disk Arrays

  12. Collaboration on ATLAS data/physics analysis with LAPP has started Dr. Junji Tojo (KEK) is collaborating with LAPP group (led by Isabelle Wingerter-Seez) on ATLAS e/gamma performance and H  γγ under the CNRS/IN2P3 programme. ↓ Proposed enlarging the SDA_1 FJPPL collaboration for 2007 by including activities of Tojo and a work on DIPHOX generator.

  13. R&Ds for LHC Upgrade • Development of the Nb3Sn conductor for higher field quadrupole magnets for IR (by A. Yamamoto, K. Tsuchiya in collab. with US, CERN). • New Rad-hard silicon microstrip sensor for ATLAS inner tracker (by Y. Unno ………). • New muon chamber readout TDC chips (by Y. Arai) and TGC readout (by O. Sasaki).

  14. Other items with CERN • Sending KEK experts for LHC accelerator commissioning (K. Oide, A. Morita….). • CERN-Japan Fellows: 2 physicists/year. • Participation of young Japanese students in the CERN Summer School every year. Try to increase 3 -> 5 students in 2007.

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