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Toshinori Abe & Masako Iwasaki 1/8/2002

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MIP energy distribution Energy linearity and resolution Momentum and Impact parameter resolution

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Detector geometry is given by XML file for a flexible detector setting. Output data (hits,...) is written in ROOT file format to take advantage of object oriented I/O. The package works on various computer plat forms (Linux, SunOS, Windows,...). The simulation will be released as a part of LCDROOT.
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eeрZH ; ZрЕЕ

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eeрZH ; ZрЕЕ

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Detailed studies with LCDROOT and Geant4 р see Dr. Iwasaki's talk We check energy linearity and energy resolution with single particle simulation data. Tracking performance with SD calorimeter has been studied using Geant4. Since these are the first tests, you should not think them seriously.
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29 cm Al

coil

40 cm Al

.......

.......

120x

=~6
2 mm scint 8 mm Pb

34x

=~4
1 cm scint 2 cm Stainless_steel

HAD Cal

.......

.......

40x

X0=~28 =~1
1 mm scint 4 mm Pb

r
EM Cal

30x

X0=~21 =~0.8
0.1mm Air 2 mm G10 0.4 mm Si 2.5 mm W

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LD LD

SD SD

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Generate eeрtt @ Ecm=500 GeV l Computer: Sun Solaris8 300MHz CPU SD: ~ 5mim/event LD: ~ 10mim/event
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рЕЕ

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рЕЕ

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In SD, it may be hard to reconstruct long lived charged particles because of small number of layers (5) in the tracking device. SD has a fine granular calorimeter (5mmX5mm) which make enable tracking. Calorimeter may help track finding with tracking device. We have checked the tracking performance using ZрЕЕ and single photon events.
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Sample is ZрЕЕ @ Ecm=91.26GeV
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Impact parameter and momentum resolution must improve when the tracks link to hits in outer layer of tracking device.
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10GeV gamma from I.P.
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Geant4 works with XML detector file on various computer plat forms. The simulated data can be analyzed with LCDROOT
- First test results are shown.

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Calorimeter tracking looks very promising for SD and will be used for some physics studies. Need more detailed check and debugs...
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