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1 | #ifndef ALITRDCONST_H |
2 | #define ALITRDCONST_H |
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3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
4 | * See cxx source for full Copyright notice */ |
5 | |
6 | /* $Id$ */ |
7 | |
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8 | // |
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9 | // Geometry parameter for the TRD |
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10 | // |
11 | |
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12 | const Int_t kNsect = 18; // Number of sectors in the full detector |
13 | const Int_t kNplan = 6; // Number of planes of the TRD |
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14 | const Int_t kNcham = 5; // Number of chambers in z-direction |
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15 | |
16 | const Float_t kRmin = 294.0; // r-dimensions of the TRD |
17 | const Float_t kRmax = 368.0; |
18 | |
19 | const Float_t kZmax1 = 378.35; // z-dimensions of the TRD |
20 | const Float_t kZmax2 = 302.0; |
21 | |
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22 | const Float_t kSheight = 74.0; // Height of the TRD-volume in spaceframe (BTR1-3) |
23 | const Float_t kSwidth1 = 99.613; // Lower width of the TRD-volume in spaceframe (BTR1-3) |
24 | const Float_t kSwidth2 = 125.707; // Upper width of the TRD-volume in spaceframe (BTR1-3) |
25 | const Float_t kSlenTR1 = 751.0; // Length of the TRD-volume in spaceframe (BTR1) |
26 | const Float_t kSlenTR2 = 313.5; // Length of the TRD-volume in spaceframe (BTR2) |
27 | const Float_t kSlenTR3 = 159.5; // Length of the TRD-volume in spaceframe (BTR3) |
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28 | |
29 | const Float_t kCheight = 11.0; // Height of the chambers |
30 | const Float_t kCspace = 1.6; // Vertical spacing of the chambers |
31 | const Float_t kCaframe = 2.675; // Height of the aluminum frame |
32 | const Float_t kCathick = 1.0; // Thickness of the aluminum frame |
33 | const Float_t kCcthick = 1.0; // Thickness of the carbon frame |
34 | |
35 | const Float_t kCwidcha = (kSwidth2 - kSwidth1) / kSheight * (kCheight + kCspace); |
36 | const Float_t kCcframe = kCheight - kCaframe; |
37 | |
38 | // Thicknesses of the the material layers |
39 | const Float_t kSeThick = 0.02; // Radiator seal |
40 | const Float_t kRaThick = 4.8; // Radiator |
41 | const Float_t kPeThick = 0.20; // PE-layer in the radiator |
42 | const Float_t kMyThick = 0.005; // Mylar-layer |
43 | const Float_t kXeThick = 3.5; // Gas mixture |
44 | const Float_t kDrThick = 3.0; // Drift region |
45 | const Float_t kAmThick = kXeThick - kDrThick; // Amplification region |
46 | |
47 | const Float_t kCuThick = 0.001; // Pad plane |
48 | const Float_t kSuThick = 0.06; // HEXCEL+G10 support structure (= 0.31% X0) |
49 | const Float_t kFeThick = 0.0044; // FEE + signal lines (= 0.31% X0) |
50 | const Float_t kCoThick = 0.02; // PE of the cooling device |
51 | const Float_t kWaThick = 0.01; // Cooling water |
52 | |
53 | // Position of the material layers |
54 | const Float_t kSeZpos = -4.1525; // Radiator seal |
55 | const Float_t kRaZpos = -1.7425; // Radiator |
56 | const Float_t kPeZpos = 0.0000; // PE-layer in the radiator |
57 | const Float_t kMyZpos = 0.6600; // Mylar-layer |
58 | const Float_t kDrZpos = 2.1625; // Drift region |
59 | const Float_t kAmZpos = 4.1125; // Amplification region |
60 | |
61 | const Float_t kCuZpos = -1.3370; // Pad plane |
62 | const Float_t kSuZpos = 0.0000; // Support structure |
63 | const Float_t kFeZpos = 1.3053; // FEE + signal lines |
64 | const Float_t kCoZpos = 1.3175; // PE of the cooling device |
65 | const Float_t kWaZpos = 1.3325; // Cooling Water |
66 | |
67 | //_____________________________________________________________________________ |
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68 | #endif |
69 | |