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Report from ILC detector working group

Report from ILC detector working group. Tao Hu Institute of High Energy Physics. Talk list. ILD – A Large Detector for ILC Yasuhiro Sugimoto ( KEK ) ILC TPC R&D Status Yulan Li (Tsinghua) Calorimeter in ILC T. Takeshita (Shinshu)

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Report from ILC detector working group

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  1. Report from ILC detector working group Tao Hu Institute of High Energy Physics

  2. Talk list • ILD – A Large Detector for ILC Yasuhiro Sugimoto (KEK) • ILC TPC R&D Status Yulan Li (Tsinghua) • Calorimeter in ILC T. Takeshita (Shinshu) • Software tools forILC Studies Akiya Miyamoto (KEK) • Heavy Scintillating Glasses for Future High Energy Particle Physics Experiments Chun Jiang (Jiao Tong)

  3. Performance goal Yasuhiro Sugimoto • Vertex Detector • Impact param. res. : sb = 5  10/(pbsin3/2q) mm • Charm and t ID is important : ct ~ 100 mm >> sb • Tracker • dpt/pt2 = 5x10-5 /GeV • Calorimeter • Jet energy resolution : sEj/Ej = 30%/Ej1/2 • Hermeticity • Forward coverage down to ~5 mrad or sEj/Ej = 3 - 4 %

  4. Detector concepts for ILC Yasuhiro Sugimoto • Four Detector Concepts: GLD, LDC, SiD, 4th • Three of them (GLD, LDC, SiD) are optimized for “PFA” • Measure energy of each particle in a jet separately: Charged particles by tracker, gs by ECAL, and neutral hadrons by HCAL • Larger BRCAL2 is preferable to separate charged tracks in thecalorimeter • Calorimeter should have fine granularity

  5. Detector features Yasuhiro Sugimoto

  6. Integration of GLD/LDC into ILD Yasuhiro Sugimoto • ILC Detector Roadmap • Convergence of detector concepts from 4 to 2 by the end of next year in order to concentrate limited resources into engineering design activities • Oct. 2007: LOI call by ILCSC • Oct. 2008: LOI submission • End of 2008: Two detectors for EDR are defined by IDAG • By July 2010: Two Detector Engineering Design Reports (EDR) • GLD and LDC have similar concept • Calorimeter optimized for PFA • TPC as the central tracker for excellent pattern recognition • GLD and LDC agreed to write a single common LOI • Study for the common design (ILD) has started

  7. Expected performance Yasuhiro Sugimoto • Impact parameter resolution GLD study Performance goal achieved 80mm Si-equivalent per layer is assumed

  8. Momentum resolution Expected performance Yasuhiro Sugimoto GLD study SiD study Performance goal achieved

  9. Expected performance Yasuhiro Sugimoto • PFA performance Jet-energy resolution study by M.Thomson for LDC00 (BR2=11.6 : Larger than latest LDC) Performance goal almost achieved

  10. ILD study activity Yasuhiro Sugimoto • Mandate • To write a Letter of Intent (LoI) to produce a detector Engineering Design Report (EDR) • Milestones • May 2008: Define the baseline parameter set for the unified detector • Oct.1,2008: Submit LoI

  11. ILD organization Yasuhiro Sugimoto • Joint steering board members selected in July 2008 • T.Behnke, D.Karlen, Y.Sugimoto, H.Videau, G.Wilson, H.Yamamoto • Our effort is now focused on unification of GLD/LDC and defining the optimized parameters of the ILD • At present, we don’t have sub-groups for sub-detectors specific to ILD (contrasting to SiD) • Information of sub-detectors will be obtained from existing horizontal collaborations (LC-TPC, CALICE, SiLC, etc.) • For the design of ILD, three working groups are organized • Detector optimization W.G. (M.Thomson, T.Yoshioka) • MDI/Integration W.G. (K.Busser, T.Tauchi) • Cost W.G. (A.Maki, H.Videau)

  12. CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  13. Yulan Li Requirements from ILC • LCTPC has to provide good momentum resolution • Precise model independent Higgs mass measurement: • Local position resolution requirements for TPC • GLD: 150 m; LDC: 100 m CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  14. Yulan Li TPC readout Technologies (Cont.) • Micromegas • Disadvantages • The narrowness of the signal (“standard”) • High discharge probability • Advantages • Intrinsically flat (pillows) • No large support structure needed • GEM • Advantage • By using multiple GEMs • Good ion feedback suppression • Low discharge probability • Disadvantages • Flatness problem, gain fluctuation • Solid support structure needed • Difference: Micromegas produce narrower signal than GEM • Bottom line: both seem feasible, both still need more R&D CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  15. Tsinghua TU-TPC Yulan Li TPC readout Technologies (Cont.) CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  16. Yulan Li Tsinghua CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  17. Yulan Li CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  18. Yulan Li Phase 1 R&D GEM feasible CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  19. Yulan Li Phase 1 R&D Micromegas with resisitive anode feasible CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  20. Phase 1 R&D Pixel “proof of principle” Yulan Li GEM+Pixel • Reconstruct a track electron by electron (or cluster by cluster) • ASIC: MediPix2, 55 x 55 m2 • Small residua: 50-60 m CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  21. Yulan Li LCTPC milestones 2006-2010 Continue LCTPC R&D via small-prototypes and LP test 2011 Decide on all parameters 2012 Final design of the LCTPC 2016 Four years construction 2017-18 Commission/Install TPC in the ILC Detector CCAST ILC Workshop Nov. 5-7, 2007, IHEP, Beijing, China.

  22. T. Takeshita

  23. T. Takeshita

  24. Jet Measurements in ILC Det. Particle reconstruction Charged particles in tracking Detector Photons in the ECAL Neutral hadrons in the HCAL (and possibly ECAL) b/c ID: Vertex Detector • For good jet erg resolution  Separate energy deposits from different particles • Large detector – spatially separate particles • High B-field – separate charged/neutrals • High granularity ECAL/HCAL – resolve particles 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 24

  25. T. Takeshita

  26. T. Takeshita

  27. T. Takeshita

  28. T. Takeshita

  29. T. Takeshita

  30. T. Takeshita

  31. T. Takeshita

  32. Chun Jiang Our Proposal To replace the structure of metal and plastic scintilaltor plates by scintillating glass blocks that glued together to form homogeneous modules. It will be - A total absorption calorimeter for optimum resolution - Can combine the functions of EM and Hadron Colorimeters A total absorption hadron calorimeter can have excellent energy resolution because it provide several ways to measure energies required to break up nuclei, which is mostly “invisible” in a sampling hadron calorimeter since such energy is mostly absorbed by the inactive metal plates.

  33. Chun Jiang Two Options Option 1: A conventional scintillation calorimeter that reads the scintillation light only Hadron energy that is invisible in a sampling calorimeter can be recovered by observing ionization energies from heavy nuclei fragments, spallation protons, ’s released by fast neutron inelastic scatterings and recoiling nuclei due to fast neutron elastic scatterings, and energies released by thermalized neutrons captured by the calorimeter media Option 2: A dual readout calorimeter that reads the scintillation light and cherenkov light separately. Compensation for the invisible energy can be achieved by this method. See the reference http://ilcagenda.linearcollider.org/contributionDisplay.py?contribId=202&session Id=45&confId=1556

  34. Chun Jiang Our Proposed BSGB Scintillating Glass • B2O3-SiO2-Gd2O3-BaO 30:25:30:15 • doped with Ce2O3 or other dopants • Chun Jiang, QingJi Zeng, Fuxi Gan,Scintillation luminescence of cerium-doped borosilicate glass containing rare-earth oxide, Proceedings of SPIE, Volume 4141, November 2000, pp. 316-323 • Density 5.4 g/cm3 is sufficient for an ILC calorimeter • Contains a large amount of thermal neutron isotopes • boron and gadolinium • Will capture thermalized neutrons in a short time and in close proximity to hadron showers providing a mean for recovering invisible energies in hadron showers

  35. Chun Jiang Some Properties of the BSGB Glass

  36. Chun Jiang Scintillation Light Yield (80 keV X-ray excitation) BSGB Glass 36

  37. Our software tools Event Generator Detector Simulator Event Reconstruction Physics Analysis Beamtest Analysis • Pythia • CAIN • StdHep • QuickSim • FullSim • Digitizer • Finder • Fitter • Jet finder ROOT objects : Event Tree & Configuration • Link to various tools at http://acfahep.kek.jp/subg/sim/soft • GLD Software at http://ilcphys.kek.jp/soft • All packages are kept in the CVS. Accessible from http://jlccvs.kek.jp/ 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 37

  38. Software tools in the world 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 38

  39. Jupiter/Satellites for Full Simulation Studies For real data Tools for simulation Tools Satellites URANUS JUPITER METIS Input/Output module set IO JLC Unified Particle Interaction and Tracking EmulatoR Unified Reconstructionand ANalysis Utility Set Monte-Carlo Exact hits To Intermediate Simulated output LEDA Library Extension forData Analysis Geant4 based Simulator JSF/ROOT based Framework MC truth generator Event Reconstruction JSF: the analysis flow controller based on ROOT The release includes event generators, Quick Simulator, and simple event display 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 39

  40. GLD Geometry in Jupiter 1 module CH2mask BCAL FCAL IT Include 10cm air gap as a readout space VTX 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 40

  41. GLD PFA Performances Using 1x1cm2 calorimeter cell size • DEjet/Ejet • is uniform except very forward • does not change significantly for ECAL cell size of 1x5cm2 • is worse for higher energy jets 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 41

  42. PandoraPFA 18 GeV 30 GeV 12 GeV 10 GeV Track Could get merged Won’t merge Won’t merge LDC00 g g g • A detailed and highly tuned algorithm • Topology based cluster merging • Identify photons, merged tracks, backscatters, MIP segments • Perform iterative re-clustering as needed, using track momentum 6 November 2007 CIAW07, Akiya Miyamoto 43

  43. Detector Optimization Zuds pair events are used for detector optimization GLD PFA: Dep. on ECAL Rin PandoraPFA: B dep. for 100 GeV jets LDC like SiD like GLD like PandoraPFA: ECAL segmentation • Larger ECAL Rin performs better • ( R is slightly more important than BR2 rule) • Further studies on physics channels are awaited. 6 November 2007 CIAW07, Akiya Miyamoto 44

  44. Physics performance Studies of physics performances by full simulations have been started. GLD Cheated PFA Analysis • n, ISR g, undetected particles, and Edouble count are main contributor to s(mH). After correct them, it is same as Z0 case • Preliminary result by GLD-PFA, • including ISR/BS, and b-tag. • mH offset and wide s(mH) are seen. Study is in progress to improve them. 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 45

  45. Physics Performance -2 6 November 2007 CIAW07, Akiya Miyamoto CIAW07, Akiya Miyamoto 46

  46. Summary • GLD and LDC spontaneously merged into ILD and will write a common LOI • More detail on TPC and Calorimeter R&D • A total absorption E/H calorimeter with heavy scintillating glasses proposed • Software tools based on ROOT and Geant4 have been developed and extensively used for GLD studies

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