Status of ECAL simulation

1
Status of ECAL simulation

• Sergey Kiselev, ITEP Moscow, for the TOF/ITEP
  group
• Input info
• ECAL acceptance
• ECAL occupancy
• Next steps

17.11.2004
GSI meeting
S.Kiselev ITEP 1
2
Input info

• CbmRoot package (04.10.2004), Geant3, Red Hat
  Linux 7.3, gcc3.2
• ECAL at 12m from the target, 11m x 11m plane
  with a hole 0.8m x 0.8m, shashlyk Pb(0.1
  cm)-Scint.(0.1 cm)- . . . , total width 28 cm
• TOF at 10m from the target, 10m x 10m plane with
  a hole 0.8m x 0.8m. A la ALICE
  layers Al - Gas -
  Glass - Gas - Al width
  0.2 0.12 0.54 0.12 0.2 cm
• Other default subsystems (see newGeo.C)
• Field map 149x79x183 points, CBMFieldMap(FIELD.
  v04pavel.map)
• 100 UrQMD AuAu central, blt3 fm, events at E/A25
  GeV

17.11.2004
GSI meeting
S.Kiselev ITEP 2
3
ECAL acceptance
primaries
species in vertex reach ECAL
p 684 305 (45)
K 41 16 (39)
K- 13 5 (38)
p 161 98 (61)
n 179 107 (60)
? (from p0) 572 401 (70)
17.11.2004
GSI meeting
S.Kiselev ITEP 3
4
ECAL acceptance - ?
17.11.2004
GSI meeting
S.Kiselev ITEP 4
5
ECAL acceptance - ?
17.11.2004
GSI meeting
S.Kiselev ITEP 5
6
ECAL acceptance - p
17.11.2004
GSI meeting
S.Kiselev ITEP 6
7
ECAL acceptance - p
17.11.2004
GSI meeting
S.Kiselev ITEP 7
8
ECAL acceptance - K
17.11.2004
GSI meeting
S.Kiselev ITEP 8
9
ECAL acceptance - K
17.11.2004
GSI meeting
S.Kiselev ITEP 9
10
ECAL acceptance - p
17.11.2004
GSI meeting
S.Kiselev ITEP 10
11
ECAL acceptance - p
17.11.2004
GSI meeting
S.Kiselev ITEP 11
12
ECAL occupancy

• 2444 tracks enter ECAL 948(39) primaries
  1496(61) secondaries
• Composition of secon. 42 ?, 24 e, 13 n, 8
  p, 6 p, 6 µ
• Origin of secondaries 28 - TOF, 16 - TRD3, 11
  - TRD2, 7 - TRD1, 3 - RICH, 13 - STS
• Max. occupancy 1.0 prim. tracks, 0.7 secon.
  tracks per dm2 at beam pipe
• With 10 cm2 cell size max. occupancy 18

17.11.2004
GSI meeting
S.Kiselev ITEP 12
13
ECAL occupancy - 2
17.11.2004
GSI meeting
S.Kiselev ITEP 13
14
ECAL occupancy - 3
17.11.2004
GSI meeting
S.Kiselev ITEP 14
15
Next steps

• Determination of energy resolution and Moliere
  radius
• Optimization of transverse and longitudinal
  granularity
• Electron/pion separation capability
• Muon separation capability
• Time of flight capability

17.11.2004
GSI meeting
S.Kiselev ITEP 15