Adding comment lines to class description needed for Root documentation,
[u/mrichter/AliRoot.git] / MUON / AliMUONConstants.cxx
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f665c1ea 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
88cb7938 16/* $Id$ */
f665c1ea 17
18#include "AliMUONConstants.h"
19
fe126bce 20#include "AliLog.h"
21
9d5f6a64 22#include "TMath.h"
fe126bce 23#include "TClass.h"
6061eac6 24#include "AliMpConstants.h"
9d5f6a64 25
3d1463c8 26//-----------------------------------------------------------------------------
c4ee792d 27/// \class AliMUONConstants
9d5f6a64 28/// This class holds various constants to be used in many places,
29/// such as the number of tracking and trigger chambers,
30/// some geometrical constants (to build the initial geometry for simulation)
31/// and mathieson distribution default values.
32/// Those constants should as much as possible replace hard-coded values
33/// which are to be considered strictly illegal in the MUON code (or any code,
34/// by the way).
3d1463c8 35//-----------------------------------------------------------------------------
f665c1ea 36
5398f946 37/// \cond CLASSIMP
38ClassImp(AliMUONConstants)
39/// \endcond
40
de2cd600 41Int_t AliMUONConstants::fgNTrackingSt = 5;
f665c1ea 42Int_t AliMUONConstants::fgNTriggerCircuit = 234;
edb96c6a 43Int_t AliMUONConstants::fgNDetElem = 228;
573dc4ee 44Int_t AliMUONConstants::fgNGeomModules = 20;
b717b957 45Float_t AliMUONConstants::fgkTriggerTofLimit = 75E-9;
89b0b88d 46
e516b01d 47Float_t AliMUONConstants::fgDefaultChamberZ[14] =
89b0b88d 48 {-526.16, -545.24, -676.4, -695.4, // St12
49 -967.5, -998.5, -1276.5, -1307.5, -1406.6, -1437.6,// updated 08/05, EDMS id 335328 (A. Tournaire)
e516b01d 50 -1603.5, -1620.5, -1703.5, -1720.5}; // M1 & M2
51
43adb63d 52Float_t AliMUONConstants::fgDefaultRatioTriggerChamber[4] =
53{1., 1.01060, 1.06236, 1.07296};
54
55
2c9844e7 56Float_t AliMUONConstants::fgSt345inclination = 0.794; // in degrees, rotation axis is X axis
57
e516b01d 58Float_t AliMUONConstants::fgDzCh = 15.5/2.;
59Float_t AliMUONConstants::fgDzSlat = 8.5/2.;
60
1c334adf 61Float_t AliMUONConstants::fgSqrtKx3 = 0.7131;
62Float_t AliMUONConstants::fgSqrtKy3 = 0.7642;
7e4a628d 63
1c334adf 64Float_t AliMUONConstants::fgSqrtKx3St1 = 0.7000;
65Float_t AliMUONConstants::fgSqrtKy3St1 = 0.7550;
7e4a628d 66
1c334adf 67Float_t AliMUONConstants::fgChargeCorrel = 0.11;
f4a7360f 68Float_t AliMUONConstants::fgChargeCorrelSt1 = 1.0; //???
1c334adf 69Float_t AliMUONConstants::fgPitch = 0.25;
70Float_t AliMUONConstants::fgPitchSt1 = 0.21;
c47b11f0 71
f4a7360f 72// From Alain TOURNAIRE
73// ALICE / ALICE Engineering baseline / Dimuonspectrometer (DIS) v7-1
74// EDMS Id 335328 for "search in EDMS
124dd59f 75// These are the diameter (Dmin == innner and Dmax - outner) values of the active surface
76// In the case of Dmax, the value corresponds to the maximum diameter of the active surface with 2pi coverture in phi
77Float_t AliMUONConstants::fgDmin[7] = { 36.4, 46.2, 63.0, 79.0, 79.0, 99.0, 100.0}; // cm
78Float_t AliMUONConstants::fgDmax[7] = { 176.6, 229.0, 308.84, 418.2, 522.0, 850.0, 900.0}; // cm
f4a7360f 79
e118b27e 80Int_t AliMUONConstants::fgMaxZoom = 20;
ecfa008b 81
208f139e 82// Defaults parameters for dipole magnet
83// From ALICE Dimuon - parameters / geometry table,
84// V7-3 (version 7 created 24/03/2004 updated 25/10/2005)
85Double_t AliMUONConstants::fgCoilZ = -994.05;
86Double_t AliMUONConstants::fgCoilL = 502.1;
87Double_t AliMUONConstants::fgYokeZ = -986.6;
88Double_t AliMUONConstants::fgYokeL = 309.4;
89
ff71f4a2 90// Defaults parameters for absorber (27/06/07)
91const Double_t AliMUONConstants::fgkAbsZBeg = -90.;
92const Double_t AliMUONConstants::fgkAbsZEnd = -505.;
93
de2cd600 94// Defaults parameters for track reconstruction
208f139e 95Double_t AliMUONConstants::fgChamberThicknessInX0 = 0.03;
de2cd600 96
24c9eaa0 97//______________________________________________________________________________
6061eac6 98Int_t AliMUONConstants::NCh()
99{
100 return AliMpConstants::NofChambers();
101}
102
103//______________________________________________________________________________
104Int_t AliMUONConstants::NTrackingCh()
105{
106 return AliMpConstants::NofTrackingChambers();
107}
108
109//______________________________________________________________________________
29fc2c86 110Int_t AliMUONConstants::ChamberNumber(Float_t z)
111{
112 // return chamber number according z position of hit. Should be taken from geometry ?
113
114 Float_t dMaxChamber = DzSlat() + DzCh() + 0.25; // cm st 3 &4 & 5
fe126bce 115 dMaxChamber += 3.00; // factor for inclination of chamber
116 // dMaxChamber += Rmax(4) * TMath::Sin(fgSt345inclination*TMath::Pi()/360.);
117 // factor for inclination of chamber
29fc2c86 118 if ( z > (DefaultChamberZ(4)+50.)) dMaxChamber = 7.; // cm stations 1 & 2
119 Int_t iChamber;
120
121 for (iChamber = 0; iChamber < 10; iChamber++) {
29fc2c86 122 if (TMath::Abs(z-DefaultChamberZ(iChamber)) < dMaxChamber) {
123 return iChamber;
124 }
125 }
fe126bce 126
127 if ( z > DefaultChamberZ(NTrackingCh()-1) ) {
128 AliWarningClass(Form("No chamber number found for z = %f",z));
129 // for (iChamber = 0; iChamber < 10; iChamber++) {
130 // cout << iChamber << " zpos: " << DefaultChamberZ(iChamber)
131 // << " from " << DefaultChamberZ(iChamber) + dMaxChamber
132 // << " to " << DefaultChamberZ(iChamber) - dMaxChamber
133 // << " delta " << dMaxChamber << endl;
134 //}
135 }
29fc2c86 136 return -1;
137}