R

1
RD status of TiCAL at Korea
2004/2/21 Calorimeter meeting
Donghee Kim Youngdo Oh Kyungpook National
University
2
Overview of Current Status

• Survey almost done
• SiPM fabrication, Scintillator, W/W-Ni
• SiPM/Tile RD has been just started
• Simulation is going on
• New collaborators
• Seoul National University Prof. Soobong Kim
• SungKyunKwan University Prof. Intae Yu

3
RD status and plan

• SiPM
• Preparation design and process during next
  semester
• - simulation of electric field in Geiger and
  drift region
• - wafer and mask
• - fabracation process
• Try to make sensor chip using FAB facility at
  ETRI.
• ETRI Electronics and Telecommunications
  Research Institute
• Scintillator
• The 1st scintillator bars for RD purpose expect
  to be produced
• during next semester
• Make sure right chemical procedure
• Compare light yield with existed scintillator
  bar
• Design of scintillator for LC prototype will be
  underway
• Simulation
• 4 cpu (4?3GHz) and 1.2TB RAID storage allocated.
  
• Mokka and susygen 3.0 installed
• SUSY simulation under Mokka
• neutralino pair production from ee-
  collision
• Simulation of prototype started

4
Simulation of TiCAL prototype using Geant4

• Structure
• Absorber 200mm 200mm 3mm
• Scintillator 200mm 200mm 2mm
• (We simulated plate, not
  strip yet)
• ? 30 layers ( 26 X0 )
• Absorber
• pure W ( density 19.3g/cm3) simulaion
  done
• alloy W-Ni (WNi 955) (density18.7g/cm3)
  simulation done
• alloy W-Pb (WPb 9010) (density18.5g/
  cm3) simulation going on
• Effective Molier Radius from Simulation
• W 18.9mm
• W-Ni 19mm
• almost the same

5
Energy Resolution

• Electron energy 1, 5, 10, 20, 50, 80, 100,
  200 GeV
• Cut range 0.001 mm
• W (15.2 ? 0.3)/sqrt(E) (0.13 ? 0.12)
• W-Ni (13.4 ? 0.7)/sqrt(E) (0.16 ? 0.29)

W-Nis energy resolution is better than Ws in
region. W-Ni is less dense, so more energy is
deposited in scintillator
6

• What to do next simulation
• Simulation for the thickness of scintillaor 25
  , 30mm
• Simulation for alloy with different ratio for
  WPb and WNi
• ? Optimize the ratio of thickness for Absorber
  and Scin
• and absorber material.
• Simulation for scintillator strip
• Jupiter and Physics simulation
• Possible target for physics simulation is
  SUSY
• - parameter scan
• - produce generator data in format of HEPEVT