japanese activities in lhc
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Japanese activities in LHC
Takahiko Kondo, KEK
May 12, 2007
The KEK-CNRS/IN2P3-CEA/DSM/DAPNIA Collaboration Meeting at KEK
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1994.12 CERN Council approved LHC in 2 steps
1995.5 Japan : 5 BYen (65 MCHF).
1996.3 India : $ 12.5M.
1996.6 Russia : 67MCHF (incl. detectors).
1996. Canada : Canadian$ 30M.
1996.12 Japan : 3.85 BYen (44 MCHF).
1996.12 CERN Council approved LHC in 1-step.
1997.12 US : $200M (accelerator) + $331M (detectors).
1998.5 Japan : 5 BYen (56 MCHF).
2002.6 LHC completion changed to 2007.
LHC internationalization
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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.
Minister Kaoru Yosano
CERN DGChris Lewellyn SmithDharuma
doll
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Superconducting Quadrupoles for LHC IPs
Design and construction done by KEK with Toshiba
B gradient : 215 T/mLength : 6.5 mAperture : 70 mmHigher multipoles < 10-4
Coil winding at Toshiba
Excitation test at KEK
Cross section
5000
6000
7000
8000
QuenchNo Quench
Que
nch
Cur
rent
(A
)
MQXA-1 2 3 5 4
215 T/m
230 T/m
Quench Sequence
2b
Thermal cycle
Thermal cycle
7 106 9 8 111st T.C.
1912 13
Thermal cycle
14 15112nd T.C.
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Bore modification
17 18
Quench history
Technique developed is applied for the magnets of the J-PARC n beam line.
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- KEK constructed 20 low-b superconducting quadrupole magnets for LHC IPs.
In-kind contribution to LHC
Construction
Already installed in the LHC tunnel
KEK KEKFermilab
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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.
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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
country Cost sharing (MCHF) Institutes Sci. Authors
3 France 52.76 (11 %) 7 90 (6.9 %)
7 Japan 32.18 (7.0 %) 15 61 (4.7 %)
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Coil at Toshiba (1999)
into LAr Cryostat (Feb. 2004)
ATLAS Central Solenoid : 100% by KEK
Down to the pit (Oct. 2004)
Full excitation was achieved in the final position (Aug. 1 2006)
7730 A2.00 T
7980 A
slow dump
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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.
Big wheel in the pit
KEK and Kobe
72 sectors assembled at CERN B180
transportation
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ATLAS Silicon Micro-strip Detector (SCT)
4 sensors/module
KEK assembled 980 modules (40%) Module mounting at Oxford U.
using robots made by KEK
Excellent noise distribution obtained during SR1 cosmic-ray
testCosmic-ray tracks at SR1 (May
2006)
Hamamatsu
Japan Mektron
SeikoPrecision
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LyonLyon
Clermont-FerrandClermont-Ferrand
Ile de Ile de FranceFrance
MarseilleMarseille
NantesNantes
StrasbourgStrasbourg
AnnecyAnnecy
Tier-1: CC-IN2P3
Disk ArraysPC ServersTape Robot
Grid system for LHC
Tier-2 Center for ATLAS at ICEPP of Univ. of Tokyo withstrong linkage to Lyon Tier-1 Center.
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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.
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R&Ds for LHC Upgrade
(1) Development of the Nb3Sn conductor for higher field quadrupole magnets for IR (by A. Ya
mamoto, K. Tsuchiya in collab. with US, CERN).
(2) New Rad-hard silicon microstrip sensor for ATLAS inner tracker (by Y. Unno ………).
(3) New muon chamber readout TDC chips (by Y. Arai) and TGC readout (by O. Sasaki).
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Other items with CERN(1) Sending KEK experts for LHC accelerator commissioning (K. Oide, A. Morita….).
(2) CERN-Japan Fellows: 2 physicists/year.
(3) Participation of young Japanese students in the CERN Summer School every year. Try to increase 3 -> 5 students in 2007.
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