Geant4 simulation program for
GLAST ACD Beam Test at CERN
Tsunefumi Mizuno, Hirofumi
Mizushima and Tuneyoshi Kamae
July 10, 2002
Detector Geometry
Veto Scint
10cm x 10cm x 1 cm
with a hole (1cm diameter)
Trigger Scint
1cm x 1cm x 1cm
ACD
54cm x 24cm x 1cm
Calorimeter Absorber
20cm x 20cm x 2.8cm, Pb
thickness and material is adjustable
distance is
user adjustable
Absorber (Pb)
10cm x 10cm x 1 cm
with a hole (1cm diameter)
Calorimeter Gap
20cm x 20cm x 1cm, Scint
thickness and material is adjustable
Tracker immitator (Pb)
55cm x 25cm x 0.56cm
user removable
Simulation Sample
10 GeV positron beam from (-200cm, 0cm, 0cm)
y-axis
x-axis
Output Sample
EventNo= 1
Event ID
BEAM= e- Mass= 0.510999
Beam profile
PXYZ= 10000.5 0 0 XYZi= -2000 0 0
Detector= TrigScint TotDepE= 1.56557
Detector= TrigVeto TotDepE= 0
Energy deposition in trig detectors and tracker
Detector= TrigAbs TotDepE= 6.07863e-08
Detector= Tracker TotDepE= 0
Detector= CalAbsorber
ID= 0 DepE= 1996.45
ID= 1 DepE= 5117.5
TotDepE= 7113.95
Energy deposition in Calorimeter
Detector= CalGap
ID= 0 DepE= 160.366
ID= 1 DepE= 69.0513
TotDepE= 229.417
Detector= ACD
Hits in ACD. ACD consists of 8
ParSpc= e- TrkLen= 10 XYZi= -498 0.0297925 -0.00707816
and this fact will be taken into
XYZo= -488 0.0300913 -0.00714916 DepE= 1.58719 ParE= 9998.95
account after the simulation.
ParSpc= gamma TrkLen= 10.0241 XYZi= -488 -11.5752 28.6861
XYZo= -498 -11.8126 29.3386 DepE= 0 ParE= 1.54331
(digitization part)
ParSpc= gamma TrkLen= 8.27256 XYZi= -488 266.185 96.0689
XYZo= -495.247 270 97.2401 DepE= 0 ParE= 1.28857
ParSpc= gamma TrkLen= 10.4406 XYZi= -488 -17.1564 84.6659
XYZo= -498 -18.5468 87.3252 DepE= 0 ParE= 0.6257
ParSpc= gamma TrkLen= 11.2633 XYZi= -488 211.877 -94.6968
XYZo= -498 216.389 -97.2458 DepE= 0 ParE= 0.715915
ParSpc= gamma TrkLen= 11.075 XYZi= -488 -202.047 -87.4407
XYZo= -498 -206.407 -89.3498 DepE= 0 ParE= 0.510999
ParSpc= gamma TrkLen= 10.0597 XYZi= -488 1.45074 55.2717
XYZo= -498 1.4581 56.3664 DepE= 0 ParE= 2.58037
ParSpc= gamma TrkLen= 10.5935 XYZi= -488 -149.325 -63.9842
XYZo= -498 -152.556 -65.3193 DepE= 0 ParE= 1.35061a
tiles