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4 * Author: The ALICE Off-line Project. *
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14 **************************************************************************/
18 Revision 1.1 2000/11/03 16:29:02 schutz
19 PPSD geometry class to correct previous name-convetion rule violation
23 //_________________________________________________________________________
24 // Geometry class for PHOS : PPSD (PHOS Preshower Detector)
25 // Its data members provide geometry parametrization of PPSD
26 // which can be changed in the constructor only.
27 // Author : Yves Schutz (SUBATECH)
28 // Modified : Yuri Kharlov (IHEP, Protvino)
31 // --- ROOT system ---
33 // --- Standard library ---
37 // --- AliRoot header files ---
39 #include "AliPHOSPPSDGeometry.h"
41 ClassImp(AliPHOSPPSDGeometry) ;
43 //____________________________________________________________________________
44 AliPHOSPPSDGeometry::AliPHOSPPSDGeometry()
47 // Initializes the PPSD parameters
49 fAnodeThickness = 0.0009 ;
50 fAvalancheGap = 0.01 ;
51 fCathodeThickness = 0.0009 ;
52 fCompositeThickness = 0.3 ;
53 fConversionGap = 0.6 ;
54 fLeadConverterThickness = 0.56 ;
55 fLeadToMicro2Gap = 0.1 ;
57 fMicro1ToLeadGap = 0.1 ;
58 fMicromegasWallThickness = 0.6 ;
59 fNumberOfModulesPhi = 4 ;
60 fNumberOfModulesZ = 4 ;
61 fNumberOfPadsPhi = 32 ;
64 fPhiDisplacement = 0.8 ;
65 fZDisplacement = 0.8 ;
67 fMicromegas1Thickness = fLidThickness + 2 * fCompositeThickness + fCathodeThickness
68 + fPCThickness + fAnodeThickness + fConversionGap + fAvalancheGap ;
69 fMicromegas2Thickness = fMicromegas1Thickness ;
71 fPPSDModuleSize[0] = 38.0 ;
72 fPPSDModuleSize[1] = fMicromegas1Thickness ;
73 fPPSDModuleSize[2] = 38.0 ;
75 fPPSDBoxSize[0] = fNumberOfModulesPhi * fPPSDModuleSize[0] + 2 * fPhiDisplacement ;
76 fPPSDBoxSize[1] = fMicromegas2Thickness + fMicromegas2Thickness
77 + fLeadConverterThickness + fMicro1ToLeadGap + fLeadToMicro2Gap ;
78 fPPSDBoxSize[2] = fNumberOfModulesZ * fPPSDModuleSize[2] + 2 * fZDisplacement ;
82 //____________________________________________________________________________