Download LHC計画スケジュール案 - Atlas Japan

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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LHC internationalization
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.
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Minister
Kaoru Yosano
Dharuma
doll
CERN DG
Chris Lewellyn Smith
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.
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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
Quench Current (A)
8000
7000
Bore modification
230 T/m
215 T/m
Thermal
cycle
6000
5000
Thermal
cycle
Thermal
cycle
Cross section
MQXA
-1
2
3
5
4
2b 7
Quench
No Quench
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9
8
10
11
1st T.C.
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Quench Sequence
Quench history
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11 15 16 17 18
2nd
T.C.
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Excitation test at KEK
Technique developed is applied for the magnets of the J-PARC n beam line. 4
In-kind contribution to
LHC Construction
- KEK constructed 20 low-b
superconducting quadrupole
magnets for LHC IPs.
Already installed in the LHC tunnel
KEK
Fermilab
KEK
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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 %)
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Japan
32.18 (7.0 %)
15
61 (4.7 %)
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ATLAS Central Solenoid : 100% by KEK
Coil at Toshiba (1999)
into LAr Cryostat (Feb. 2004)
Down to the pit (Oct. 2004)
7730 A
2.00 T
7980 A
Full excitation was achieved in the final
sl
o
w
d
u
position (Aug. 1
m
2006)
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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.
KEK and Kobe
72 sectors assembled at
CERN B180
Big wheel in the pit
transportation
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ATLAS Silicon Micro-strip Detector (SCT)
Hamamatsu
Seiko
Precision
Japan
Mektron
4 sensors/module
KEK assembled 980 modules (40%)
Excellent noise distribution obtained
during SR1 cosmic-ray test
Module mounting at Oxford U.
using robots made by KEK
Cosmic-ray tracks at SR1 (May 2006)
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Grid system for LHC
Strasbourg
Tier-2 Center for ATLAS at
ICEPP of Univ. of Tokyo with
strong linkage to Lyon Tier-1 Center.
Nantes
Ile de
France
Clermont-Ferrand
Lyon
Annecy
Tier-1: CC-IN2P3
Marseille
Tape Robot
PC Servers
Disk Arrays
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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.
Yamamoto, 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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