Fixed the 400microns mismatch in the Y' axis of SPD, layer 1
[u/mrichter/AliRoot.git] / TRD / AliTRDconst.h
CommitLineData
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 10const Int_t kNsect = 18; // Number of sectors in the full detector
11const Int_t kNplan = 6; // Number of planes of the TRD
99d5402e 12const Int_t kNcham = 5; // Number of chambers in z-direction
82bbf98a 13
14const Float_t kRmin = 294.0; // r-dimensions of the TRD
15const Float_t kRmax = 368.0;
16
17const Float_t kZmax1 = 378.35; // z-dimensions of the TRD
18const Float_t kZmax2 = 302.0;
19
20const Float_t kSheight = 74.0; // Height of the TRD-volume in spaceframe
21const Float_t kSwidth1 = 103.674; // Lower width of the TRD-volume in spaceframe
22const Float_t kSwidth2 = 129.768; // Upper width of the TRD-volume in spaceframe
23const Float_t kSlength = 751.0; // Length of the TRD-volume in spaceframe
24
25const Float_t kCheight = 11.0; // Height of the chambers
26const Float_t kCspace = 1.6; // Vertical spacing of the chambers
27const Float_t kCaframe = 2.675; // Height of the aluminum frame
28const Float_t kCathick = 1.0; // Thickness of the aluminum frame
29const Float_t kCcthick = 1.0; // Thickness of the carbon frame
30
31const Float_t kCwidcha = (kSwidth2 - kSwidth1) / kSheight * (kCheight + kCspace);
32const Float_t kCcframe = kCheight - kCaframe;
33
34// Thicknesses of the the material layers
35const Float_t kSeThick = 0.02; // Radiator seal
36const Float_t kRaThick = 4.8; // Radiator
37const Float_t kPeThick = 0.20; // PE-layer in the radiator
38const Float_t kMyThick = 0.005; // Mylar-layer
39const Float_t kXeThick = 3.5; // Gas mixture
40const Float_t kDrThick = 3.0; // Drift region
41const Float_t kAmThick = kXeThick - kDrThick; // Amplification region
42
43const Float_t kCuThick = 0.001; // Pad plane
44const Float_t kSuThick = 0.06; // HEXCEL+G10 support structure (= 0.31% X0)
45const Float_t kFeThick = 0.0044; // FEE + signal lines (= 0.31% X0)
46const Float_t kCoThick = 0.02; // PE of the cooling device
47const Float_t kWaThick = 0.01; // Cooling water
48
49// Position of the material layers
50const Float_t kSeZpos = -4.1525; // Radiator seal
51const Float_t kRaZpos = -1.7425; // Radiator
52const Float_t kPeZpos = 0.0000; // PE-layer in the radiator
53const Float_t kMyZpos = 0.6600; // Mylar-layer
54const Float_t kDrZpos = 2.1625; // Drift region
55const Float_t kAmZpos = 4.1125; // Amplification region
56
57const Float_t kCuZpos = -1.3370; // Pad plane
58const Float_t kSuZpos = 0.0000; // Support structure
59const Float_t kFeZpos = 1.3053; // FEE + signal lines
60const Float_t kCoZpos = 1.3175; // PE of the cooling device
61const Float_t kWaZpos = 1.3325; // Cooling Water
62
63//_____________________________________________________________________________