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 | //____________________________________________________________________________ |