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ILD Workshop 報告

ILD Workshop 報告. 2009 年 2 月 23 日 杉本康博. ILD とは. 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

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ILD Workshop 報告

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  1. ILD Workshop 報告 2009年2月23日 杉本康博

  2. ILDとは • 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

  3. LOI • 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

  4. ILD Workshop • 第1回 • 2008年1月14日~16日 • DESY Zeuthen • GLD-LDC 統一に向けた作業の開始 • 第2回 • 2008年9月11日~13日 • Cambridge • ILD主要パラメータの決定 • 第3回 • 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

  5. Seoul ILD WSの目的 • LOIの現状に関する議論 • 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

  6. Physics/Optimization session • Higgs recoil mass analysis • Study of ZH  nnqq • ZH  qqqq • Benchmark analysis of tau-pairs • SUSY point 5 chargino & neutralino: part-1 • 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 • Simulation studyはGRIDを活用 • しかしリソースの大部分はEU • (DESY, Lyon)にあり、KEKの • 寄与は小さい

  7. Sub-detectors session • Vertex detector • Silicon tracker • TPC • ECAL Si_W • ECAL Scintillator • Digital HCAL • Analog HCAL • FCAL

  8. MDI / Integration session • 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

  9. Parallel session • Software tools • MDI / Integration • Vertex detector • Si tracking / General tracking • Calorimeter

  10. ILD design in LOI

  11. ILD design in LOI • Vertex detector (VTX) • Two options: 5-single layers v.s. 3-doublets • Four sensor options: CCD / CMOS / DEPFET / 3D

  12. ILD design in LOI • Si trackers • 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 • Time projection chamber (TPC) Beam pipe / VTX / SIT / FTD

  13. ILD design in LOI • ECAL • 2 options: Si-Tungsten v.s. Scintillator-Tungsten • Rin=1.85m ((GLD+LDC)/2) • 1cm2 cell size • HCAL • 2 options: Sci.-Fe (analog HCAL) v.s. RPC-Fe (semi-digital HCAL) • 3x3cm2 (A-HCAL) or 1x1cm2 (D-HCAL) cell size

  14. ILD design in LOI • Coil / Yoke • 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

  15. ILD design in LOI • Integration • CMS-like assembly • Barrel: 3 rings / Endcap: 3 parts/side (?) • Surface assembly  Put down to underground by 2000t crane • Endcap opening • Rear part is split into 2 / Front part is one ring • Small opening (gap~1m) at beam position • Big operation at garage position

  16. ILD design in LOI ILD proposal of the cavern/shafts

  17. ILD LOIの現状 • ~80%完成（既に100ページを超えてしまった） • 著者：~220 (Feb.15) • 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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