GLD Calorimetry

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
GLD

• Area of EM CAL (Barrel Endcap)
• SiD 40 m2 / layer
• TESLA 80 m2 / layer
• GLD 100 m2 / layer
• (GLC 130 m2 /layer)

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
RD 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
• RD of SiPM (DPPD)
• RD 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 RD via KEK ILC group
• Because we have no core staffs at KEK
• Japan-US program failed for CAL RD
• (Partly) because we have no core staffs at KEK
• We currently have
• Kakenhi (Takeshita, 20042005)
• KEK Collaborative development research
  (Takeshita, 20042005)
• Japan-Germany joint project (CALTPC, travel
  money, 20052006)
• 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 (20052006,
  CAL TPC)
• Japan-France joint project ?

15
CAL-related talks at LCWS05

• From Japan
• H. Miyata RD 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 RD activities in Korea
• S. Nam CERN beam test of Silicon-Tungsten
  calorimeter test module

16
Summary

• Our default calorimeter design
• ECAL WScintiSiPM, analog readout
• HCAL Pb(Fe)ScintiSiPM, (semi-)digital readout
• RD 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