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GLD Calorimetry

GLD Calorimetry. 2005/Mar/03 K. Kawagoe / Kobe-U. Introduction. Current design To be optimized for Particle Flow Algorithm (PFA) aiming at 30%/sqrt(E) resolution for jets ECAL: W/Scinti with SiPM analog readout HCAL: Pb(Fe)/Scinti with SiPM (semi-) digital readout Other options ?

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GLD Calorimetry

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  1. GLD Calorimetry 2005/Mar/03 K. Kawagoe / Kobe-U

  2. Introduction • Current design • To be optimized for Particle Flow Algorithm (PFA) aiming at 30%/sqrt(E) resolution for jets • ECAL: W/Scinti with SiPM analog readout • HCAL: Pb(Fe)/Scinti with SiPM (semi-) digital readout • Other options ? • SiW ?? (no manpower…)

  3. The “GLD” model under consideration “GLD” (world-wide) “GLC” design (ACFA) m m SC-coil SC-coil HCAL (Pb(Fe)/scinti or digital) Pb/scinti HCAL W/Scinti ECAL Pb/Scinti ECAL TPC (Jet chamber as option) Jet chamber Si intermedi.-Trk Si intermedi.-Trk SiVTX pixel (cold version) SiVTX pixel

  4. Comparison of size of EM CAL surface • Area of EM CAL (Barrel + Endcap) • SiD: ~40 m2 / layer • TESLA: ~80 m2 / layer • GLD: ~100 m2 / layer • (GLC: ~130 m2 /layer) GLD ~2.1m

  5. Layout of scintillator layers • We have an experience of • Strip-array ECAL (20cm x 1cm) • Small tile ECAL (4cm x 4cm) • Ghost clusters from strip-array layers would be easily removed with additional small-tile layers (effective cell size 1cm x 1cm). • This idea SHOULD be well confirmed by full simulation studies. • If NOT, we would need ECAL with smaller tiles (2cm x 2cm or less ?) • Strip & Tile CAL can be achieved with SiPM readout (directly attached to WLS fibers) .

  6. Common layout for ECAL and HCAL

  7. Number of readout channels • With 20cm x 1cm strips and 4cm x 4cm tiles • ECAL prototype • 650 analog readout channels • Calorimetry for the real detector • ECAL: ~2.0M analog readout channels. • HCAL: ~5.5M (semi-)digital readout channels • A big challenge !! • Number of channels could easily change the order depending on the strip/tile size.

  8. R&D issues • Design optimization (scintillator shape and size) • to remove “ghost” clusters • to match tracks and clusters for particle flow algorithm • Photo-sensors (SiPM) • Readout electronics • Gain monitoring system • Mechanical structure

  9. Possible schedule (as of Sep. 2004, very very preliminary) • 2004-2005 • Design optimization • R&D of SiPM (DPPD) • R&D of readout electronics • 2005-2006 • Construction of an ECAL test module • Tests with cosmic-rays • 2006-2008 • Test beam studies of the ECAL test module “standalone” • Test beam studies in combination with CALICE HCAL

  10. Simulation studies • Jupiter simulation • Weekly acfa-sim-j TV meeting • CAL and MUD structures are implemented. • Ready for physics studies ? • Study of particle flow algorithm (S. Yamamoto) • G4 Simulation with simple structure • Energy resolution by M.C. Chuan (Tohoku) • Strip-array ECAL (Tsukuba) • DigiCAL simulation (Shinshu) • Clustering/particle flow algorithm (Kobe)

  11. Hardware studies • Scintillator strips/tiles • Being studied in Niigata • SiPM • Being developed in Hamamatsu • Being tested in Niigata and Kobe • Readout electronics • Being designed by M. Tanaka at KEK

  12. Mon power in Japan • Japanese staffs • KEK (J. Kanzaki) • Kobe U. (K. Kawagoe) • Konan U. (F. Kajino) • Niigata U. (H. Miyata) • Shinshu U. (T. Takeshita) • Tsukuba U. (S. Kim, H. Matsunaga) • No core staffs at KEK • Problem in keeping activity • Problem in getting budget from KEK

  13. Budget crisis in FY2005 • No money for CAL R&D via KEK ILC group • Because we have no core staffs at KEK • Japan-US program failed for CAL R&D • (Partly) because we have no core staffs at KEK • We currently have • Kakenhi (Takeshita, 2004+2005) • KEK Collaborative development research (Takeshita, 2004+2005) • Japan-Germany joint project (CAL+TPC, travel money, 2005+2006) • We are applying / going to apply • Several Kakenhi proposals • Japan-Russia joint project (with JINR) • Japan-Korea joint project ??

  14. International collaborations • Korea • Kyungpook National U. (K. Cho, D.H. Kim, Y.D. Oh, J.S. Suh） • Seoul National U. (S. Kim ) • SungKunKwan U. (I. Yu) • Monthly Japan-Korea TV meeting (2005 Feb ~ ) • Japan-Korea CAL meeting in Daegu (2005 July) • They are going to make their own EM prototype • W-plates, Scintillator, SiPM, electronics • CAL simulation with Mokka • Russia • JINR (P. Evtukhovitch, et al.) • Peter will visit Japan for 2 months in 2005. • ISTC3000 failed. Planning to apply a new proposal to ISTC. • Applying to the new Japan-Russia joint project (JSPS) • Good relation with CALICE • Communication with Analog HCAL group at DESY • Tsukuba DC for SiW ECAL beamtest at DESY (2005 Feb ~, a half year) • Japan-Germany joint project approved (2005+2006, CAL + TPC) • Japan-France joint project ?

  15. CAL-related talks at LCWS05 • From Japan • H. Miyata: R&D of calorimeter using striplet/cube scintillators with SiPM • T. Takeshita: Progress of photosensors for scintillator • H. Matsunaga: Simulation study of scintillator-based calorimeter • N. Nakajima: Correlation matrix method for Pb/Scinti sampling calorimeter • T. Takeshita for M. Tanaka: Electronics for scintillator-based calorimeter (title to be confirmed) • From Korea • D.H. Kim: The status of the scintillator-based calorimetry R&D activities in Korea • S. Nam: CERN beam test of Silicon-Tungsten calorimeter test module

  16. Summary • Our default calorimeter design • ECAL W+Scinti+SiPM, analog readout • HCAL Pb(Fe)+Scinti+SiPM, (semi-)digital readout • R&D issues • Design optimization • Scinti./SiPM • Readout electronics • Gain monitoring • Mechanical structure • Schedule • Test beam for ECAL prototype in 2006 ? • International collaborations growing • Lack of • Core staffs at KEK • Budget for prototype/test beam

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