ILD Workshop 報告 - ILC-Asia

ILD Workshop 報告
2009年2月23日
杉本康博
ILDとは
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2009年3月末にILC Research Director (RD)に
Letter of Intent (LOI)を提出する予定の３つの
測定器の一つ（他はSiD, 4th)
GLD(Asia base)とLDC(EU base)が2007年6月
(LCWS07)に合体
Gas baseのcentral tracker (TPC)とParticle
Flow Algorithm (PFA)に最適化された
calorimeterを持った大型汎用測定器
LOI
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ILC Detectorの “LOI” とは？
 Letter of Intent to go to technical design phase
 2009年3月31日締め切り
 International Detector Advisory Group (IDAG) によって “validate”
され、2009年9月頃にIDAG reportが出る
Expected LOI content (M.Davier, LCWS08)
 約100ページ（書き足りない分はsupporting documents）
 Detector philosophy, sub-detectors and alternatives
 Evaluation of physics performances based on a common process
benchmark list
 Integration issues with accelerator
 Status of a realistic detector model
 Identification of state, plans and timescale for required R&D and
technological options
 Preliminary cost estimate
 Structure of group and capacity to carry out the work
 Resources needed as function of time for technical design
ILD Workshop
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第1回
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第2回
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2008年1月14日~16日
DESY Zeuthen
GLD-LDC 統一に向けた作業の開始
2008年9月11日~13日
Cambridge
ILD主要パラメータの決定
第3回
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2009年2月16日~18日
韓国・ソウル、梨花女子大
LOI直前対策
~75人の参加者
Seoul ILD WSの目的
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LOIの現状に関する議論
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Benchmark reactionのsimulation study
Detector optimization
Sub-detector design
Detector integration
LOI完成に向けて必要な重要項目についての共
通認識を持つ
Physics/Optimization session
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Higgs recoil mass analysis
Study of ZH  nnqq
•Simulation studyはGRIDを活用
ZH  qqqq
•しかしリソースの大部分はEU
Benchmark analysis of tau-pairs
(DESY, Lyon)にあり、KEKの
SUSY point 5 chargino & neutralino: part-1
寄与は小さい
SUSY point 5 chargino & neutralino: part-2
ZHH at 500 GeV
WWnn / ZZnn at 1TeV
SPS1a’ stau polarization and mass measurement
SPS1a’ smuon, chargini, neutralino mass measurement
Model independent WIMP search
Non-pointing photons as signature for GMSB
Photon reconstruction in the ECAL
Higgs branching ratios for ZH  llqq
Polarization measurement from WW
Measurement of littlest higgs parameters at ILC
LHC/ILD SUSY fitting
Top pair production-1
Top pair production-2
Sub-detectors session
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Vertex detector
Silicon tracker
TPC
ECAL Si_W
ECAL Scintillator
Digital HCAL
Analog HCAL
FCAL
MDI / Integration session
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Progress on the yoke design
Integration of sub-detectors
Detector magnet design
Design principle of beam pipe
Wakefield, loss in the beam pipe
Integration discussion
Push-pull operation
R&Ds after LOI, focused on the engineering tasks
Parallel session
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Software tools
MDI / Integration
Vertex detector
Si tracking / General tracking
Calorimeter
ILD design in LOI
ILD design in LOI
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Vertex detector (VTX)
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Two options: 5-single layers v.s. 3-doublets
Four sensor options: CCD / CMOS / DEPFET / 3D
ILD design in LOI
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Si trackers
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Si internal tracker (SIT: Si strip)
Forward tracking detector (FTD: Si pixel/strip)
Si external tracker (SET: Si strip)
Endcap tracking detector (EDT)
Central tracker
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Time projection chamber (TPC)
Beam pipe / VTX / SIT / FTD
ILD design in LOI
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ECAL
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2 options: Si-Tungsten v.s. Scintillator-Tungsten
Rin=1.85m ((GLD+LDC)/2)
1cm2 cell size
HCAL
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2 options: Sci.-Fe (analog HCAL) v.s. RPC-Fe
(semi-digital HCAL)
3x3cm2 (A-HCAL) or 1x1cm2 (D-HCAL) cell size
ILD design in LOI
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Coil / Yoke
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3.5 T nominal, 4 T maximum
Coil: Rin=3.615m, Rout=4.0m, L=7.35m
Cryostat: Rin=3.44 m, Rout=4.34m
E=2.73 GJ@4T, E/M=11.9 kJ/kg
Stray field: 38 G at R=15 m (limit:50 G at 15m)
Magnetic force: 18500 ton on endcap yoke
ILD design in LOI
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Integration
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CMS-like assembly
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Barrel: 3 rings / Endcap: 3 parts/side (?)
Surface assembly  Put down to underground by
2000t crane
Endcap opening
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Rear part is split into 2 / Front part is one ring
Small opening (gap~1m) at beam position
Big operation at garage position
ILD design in LOI
ILD proposal of the cavern/shafts
ILD LOIの現状
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~80%完成（既に100ページを超えてしまった）
著者：~220 (Feb.15)
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アジアが非常に少ない今後の増加を期待(努力）
Asia

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