1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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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 *
12 * about the suitability of this software for any purpose. It is *
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14 **************************************************************************/
18 Revision 1.2 2000/11/09 15:49:00 martinez
19 Coding convention rules obeyed
21 Revision 1.1 2000/11/03 16:29:02 schutz
22 PPSD geometry class to correct previous name-convetion rule violation
26 //_________________________________________________________________________
27 // Geometry class for PHOS : PPSD (PHOS Preshower Detector)
28 // Its data members provide geometry parametrization of PPSD
29 // which can be changed in the constructor only.
30 // Author : Yves Schutz (SUBATECH)
31 // Modified : Yuri Kharlov (IHEP, Protvino)
34 // --- ROOT system ---
36 // --- Standard library ---
38 // --- AliRoot header files ---
40 #include "AliPHOSPPSDGeometry.h"
42 ClassImp(AliPHOSPPSDGeometry) ;
44 //____________________________________________________________________________
45 AliPHOSPPSDGeometry::AliPHOSPPSDGeometry()
48 // Initializes the PPSD parameters
50 fAnodeThickness = 0.0009 ;
51 fAvalancheGap = 0.01 ;
52 fCathodeThickness = 0.0009 ;
53 fCompositeThickness = 0.3 ;
54 fConversionGap = 0.6 ;
55 fLeadConverterThickness = 0.56 ;
56 fLeadToMicro2Gap = 0.1 ;
58 fMicro1ToLeadGap = 0.1 ;
59 fMicromegasWallThickness = 0.6 ;
60 fNumberOfModulesPhi = 4 ;
61 fNumberOfModulesZ = 4 ;
62 fNumberOfPadsPhi = 32 ;
65 fPhiDisplacement = 0.8 ;
66 fZDisplacement = 0.8 ;
68 fMicromegas1Thickness = fLidThickness + 2 * fCompositeThickness + fCathodeThickness
69 + fPCThickness + fAnodeThickness + fConversionGap + fAvalancheGap ;
70 fMicromegas2Thickness = fMicromegas1Thickness ;
72 fPPSDModuleSize[0] = 38.0 ;
73 fPPSDModuleSize[1] = fMicromegas1Thickness ;
74 fPPSDModuleSize[2] = 38.0 ;
76 fPPSDBoxSize[0] = fNumberOfModulesPhi * fPPSDModuleSize[0] + 2 * fPhiDisplacement ;
77 fPPSDBoxSize[1] = fMicromegas2Thickness + fMicromegas2Thickness
78 + fLeadConverterThickness + fMicro1ToLeadGap + fLeadToMicro2Gap ;
79 fPPSDBoxSize[2] = fNumberOfModulesZ * fPPSDModuleSize[2] + 2 * fZDisplacement ;
83 //____________________________________________________________________________