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3da30618 | 1 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
2 | * See cxx source for full Copyright notice */ | |
3 | ||
4 | /* $Id$ */ | |
5 | ||
82bbf98a | 6 | // |
99d5402e | 7 | // Geometry parameter for the TRD |
82bbf98a | 8 | // |
9 | ||
82bbf98a | 10 | const Int_t kNsect = 18; // Number of sectors in the full detector |
11 | const Int_t kNplan = 6; // Number of planes of the TRD | |
99d5402e | 12 | const Int_t kNcham = 5; // Number of chambers in z-direction |
82bbf98a | 13 | |
14 | const Float_t kRmin = 294.0; // r-dimensions of the TRD | |
15 | const Float_t kRmax = 368.0; | |
16 | ||
17 | const Float_t kZmax1 = 378.35; // z-dimensions of the TRD | |
18 | const Float_t kZmax2 = 302.0; | |
19 | ||
20 | const Float_t kSheight = 74.0; // Height of the TRD-volume in spaceframe | |
21 | const Float_t kSwidth1 = 103.674; // Lower width of the TRD-volume in spaceframe | |
22 | const Float_t kSwidth2 = 129.768; // Upper width of the TRD-volume in spaceframe | |
23 | const Float_t kSlength = 751.0; // Length of the TRD-volume in spaceframe | |
24 | ||
25 | const Float_t kCheight = 11.0; // Height of the chambers | |
26 | const Float_t kCspace = 1.6; // Vertical spacing of the chambers | |
27 | const Float_t kCaframe = 2.675; // Height of the aluminum frame | |
28 | const Float_t kCathick = 1.0; // Thickness of the aluminum frame | |
29 | const Float_t kCcthick = 1.0; // Thickness of the carbon frame | |
30 | ||
31 | const Float_t kCwidcha = (kSwidth2 - kSwidth1) / kSheight * (kCheight + kCspace); | |
32 | const Float_t kCcframe = kCheight - kCaframe; | |
33 | ||
34 | // Thicknesses of the the material layers | |
35 | const Float_t kSeThick = 0.02; // Radiator seal | |
36 | const Float_t kRaThick = 4.8; // Radiator | |
37 | const Float_t kPeThick = 0.20; // PE-layer in the radiator | |
38 | const Float_t kMyThick = 0.005; // Mylar-layer | |
39 | const Float_t kXeThick = 3.5; // Gas mixture | |
40 | const Float_t kDrThick = 3.0; // Drift region | |
41 | const Float_t kAmThick = kXeThick - kDrThick; // Amplification region | |
42 | ||
43 | const Float_t kCuThick = 0.001; // Pad plane | |
44 | const Float_t kSuThick = 0.06; // HEXCEL+G10 support structure (= 0.31% X0) | |
45 | const Float_t kFeThick = 0.0044; // FEE + signal lines (= 0.31% X0) | |
46 | const Float_t kCoThick = 0.02; // PE of the cooling device | |
47 | const Float_t kWaThick = 0.01; // Cooling water | |
48 | ||
49 | // Position of the material layers | |
50 | const Float_t kSeZpos = -4.1525; // Radiator seal | |
51 | const Float_t kRaZpos = -1.7425; // Radiator | |
52 | const Float_t kPeZpos = 0.0000; // PE-layer in the radiator | |
53 | const Float_t kMyZpos = 0.6600; // Mylar-layer | |
54 | const Float_t kDrZpos = 2.1625; // Drift region | |
55 | const Float_t kAmZpos = 4.1125; // Amplification region | |
56 | ||
57 | const Float_t kCuZpos = -1.3370; // Pad plane | |
58 | const Float_t kSuZpos = 0.0000; // Support structure | |
59 | const Float_t kFeZpos = 1.3053; // FEE + signal lines | |
60 | const Float_t kCoZpos = 1.3175; // PE of the cooling device | |
61 | const Float_t kWaZpos = 1.3325; // Cooling Water | |
62 | ||
63 | //_____________________________________________________________________________ |