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