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 ? SiW ?? (no manpower…)

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

Area of EM CAL (Barrel + Endcap) –SiD: ~40 m 2 / layer –TESLA: ~80 m 2 / layer –GLD: ~100 m 2 / layer –(GLC: ~130 m 2 /layer) GLD ~2.1m Comparison of size of EM CAL surface

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).

Common layout for ECAL and HCAL

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.

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

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

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)

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

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

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, ) –KEK Collaborative development research (Takeshita, ) –Japan-Germany joint project (CAL+TPC, travel money, ) We are applying / going to apply –Several Kakenhi proposals –Japan-Russia joint project (with JINR) –Japan-Korea joint project ??

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 –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 ( , CAL + TPC) –Japan-France joint project ?

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

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