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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. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
12 | * about the suitability of this software for any purpose. It is * | |
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 | ||
36 | ClassImp(AliPHOSPPSDGeometry) ; | |
37 | ||
38 | //____________________________________________________________________________ | |
39 | AliPHOSPPSDGeometry::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 | //____________________________________________________________________________ |