Chamber half-planes of stations 3-5 at different z-positions.
[u/mrichter/AliRoot.git] / PHOS / AliPHOSPPSDGeometry.cxx
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7119952d 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
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11 * appear in the supporting documentation. The authors make no claims *
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13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/*
17 $Log$
18*/
19
20//_________________________________________________________________________
21// Geometry class for PHOS : PPSD (PHOS Preshower Detector)
22//
23//*-- Author : Yves Schutz (SUBATECH)
24// Modified : Yuri Kharlov (IHEP, Protvino) 15 September 2000
25//
26// --- ROOT system ---
27
28// --- Standard library ---
29
30#include <iostream.h>
31
32// --- AliRoot header files ---
33
34#include "AliPHOSPPSDGeometry.h"
35
36ClassImp(AliPHOSPPSDGeometry) ;
37
38//____________________________________________________________________________
39AliPHOSPPSDGeometry::AliPHOSPPSDGeometry()
40{
41
42 // Initializes the PPSD parameters
43
44 fAnodeThickness = 0.0009 ;
45 fAvalancheGap = 0.01 ;
46 fCathodeThickness = 0.0009 ;
47 fCompositeThickness = 0.3 ;
48 fConversionGap = 0.6 ;
49 fLeadConverterThickness = 0.56 ;
50 fLeadToMicro2Gap = 0.1 ;
51 fLidThickness = 0.2 ;
52 fMicro1ToLeadGap = 0.1 ;
53 fMicromegasWallThickness = 0.6 ;
54 fNumberOfModulesPhi = 4 ;
55 fNumberOfModulesZ = 4 ;
56 fNumberOfPadsPhi = 24 ;
57 fNumberOfPadsZ = 24 ;
58 fPCThickness = 0.1 ;
59 fPhiDisplacement = 0.8 ;
60 fZDisplacement = 0.8 ;
61
62 fMicromegas1Thickness = fLidThickness + 2 * fCompositeThickness + fCathodeThickness
63 + fPCThickness + fAnodeThickness + fConversionGap + fAvalancheGap ;
64 fMicromegas2Thickness = fMicromegas1Thickness ;
65
66 fPPSDModuleSize[0] = 38.0 ;
67 fPPSDModuleSize[1] = fMicromegas1Thickness ;
68 fPPSDModuleSize[2] = 38.0 ;
69
70 fPPSDBoxSize[0] = fNumberOfModulesPhi * fPPSDModuleSize[0] + 2 * fPhiDisplacement ;
71 fPPSDBoxSize[1] = fMicromegas2Thickness + fMicromegas2Thickness
72 + fLeadConverterThickness + fMicro1ToLeadGap + fLeadToMicro2Gap ;
73 fPPSDBoxSize[2] = fNumberOfModulesZ * fPPSDModuleSize[2] + 2 * fZDisplacement ;
74
75}
76
77//____________________________________________________________________________