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4c039060 | 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 | ||
16 | /* | |
17 | $Log$ | |
18 | */ | |
19 | ||
fe4da5cc | 20 | /////////////////////////////////////////////////////////////////////////////// |
21 | // // | |
22 | // Transition Radiation Detector version 0 -- coarse simulation // | |
23 | // // | |
24 | //Begin_Html | |
25 | /* | |
1439f98e | 26 | <img src="picts/AliTRDv0Class.gif"> |
fe4da5cc | 27 | */ |
28 | //End_Html | |
29 | // // | |
30 | // // | |
31 | /////////////////////////////////////////////////////////////////////////////// | |
32 | ||
33 | #include <TMath.h> | |
34 | #include <TRandom.h> | |
35 | #include <TVector.h> | |
fe4da5cc | 36 | |
fe4da5cc | 37 | #include "AliTRDv0.h" |
38 | #include "AliRun.h" | |
39 | #include "AliMC.h" | |
40 | #include "AliConst.h" | |
41 | ||
42 | ClassImp(AliTRDv0) | |
43 | ||
44 | //_____________________________________________________________________________ | |
45 | AliTRDv0::AliTRDv0(const char *name, const char *title) | |
46 | :AliTRD(name, title) | |
47 | { | |
48 | // | |
49 | // Standard constructor for Transition Radiation Detector version 0 | |
50 | // | |
82bbf98a | 51 | |
52 | fIdSens = 0; | |
53 | fHitsOn = 0; | |
54 | ||
55 | fIdSpace1 = 0; | |
56 | fIdSpace2 = 0; | |
57 | fIdSpace3 = 0; | |
58 | ||
59 | fIdChamber1 = 0; | |
60 | fIdChamber2 = 0; | |
61 | fIdChamber3 = 0; | |
62 | ||
fe4da5cc | 63 | } |
64 | ||
65 | //_____________________________________________________________________________ | |
66 | void AliTRDv0::CreateGeometry() | |
67 | { | |
68 | // | |
82bbf98a | 69 | // Create the GEANT geometry for the Transition Radiation Detector - Version 0 |
70 | // This version covers the full azimuth. | |
d3f347ff | 71 | // |
82bbf98a | 72 | // Author: Christoph Blume (C.Blume@gsi.de) 20/07/99 |
d3f347ff | 73 | // |
74 | ||
82bbf98a | 75 | Float_t xpos, ypos, zpos; |
d3f347ff | 76 | |
82bbf98a | 77 | // Check that FRAME is there otherwise we have no place where to put the TRD |
78 | AliModule* FRAME = gAlice->GetModule("FRAME"); | |
79 | if (!FRAME) return; | |
fe4da5cc | 80 | |
82bbf98a | 81 | // Define the chambers |
82 | AliTRD::CreateGeometry(); | |
fe4da5cc | 83 | |
82bbf98a | 84 | // Position the the TRD-sectors in all TRD-volumes in the spaceframe |
85 | xpos = 0.; | |
86 | ypos = 0.; | |
87 | zpos = 0.; | |
88 | gMC->Gspos("TRD ",1,"BTR1",xpos,ypos,zpos,0,"ONLY"); | |
89 | gMC->Gspos("TRD ",2,"BTR2",xpos,ypos,zpos,0,"ONLY"); | |
90 | gMC->Gspos("TRD ",3,"BTR3",xpos,ypos,zpos,0,"ONLY"); | |
d3f347ff | 91 | |
fe4da5cc | 92 | } |
93 | ||
94 | //_____________________________________________________________________________ | |
95 | void AliTRDv0::CreateMaterials() | |
96 | { | |
97 | // | |
98 | // Create materials for the Transition Radiation Detector | |
99 | // | |
82bbf98a | 100 | |
fe4da5cc | 101 | AliTRD::CreateMaterials(); |
82bbf98a | 102 | |
fe4da5cc | 103 | } |
104 | ||
105 | //_____________________________________________________________________________ | |
106 | void AliTRDv0::Init() | |
107 | { | |
108 | // | |
109 | // Initialise Transition Radiation Detector after geometry is built | |
110 | // | |
82bbf98a | 111 | |
fe4da5cc | 112 | AliTRD::Init(); |
82bbf98a | 113 | |
114 | for (Int_t i = 0; i < 80; i++) printf("*"); | |
115 | printf("\n"); | |
116 | ||
117 | // Identifier of the sensitive volume (amplification region) | |
118 | fIdSens = gMC->VolId("UL06"); | |
119 | ||
120 | // Identifier of the TRD-spaceframe volumina | |
121 | fIdSpace1 = gMC->VolId("B028"); | |
122 | fIdSpace2 = gMC->VolId("B029"); | |
123 | fIdSpace3 = gMC->VolId("B030"); | |
124 | ||
125 | // Identifier of the TRD-driftchambers | |
126 | fIdChamber1 = gMC->VolId("UCIO"); | |
127 | fIdChamber2 = gMC->VolId("UCIM"); | |
128 | fIdChamber3 = gMC->VolId("UCII"); | |
129 | ||
fe4da5cc | 130 | } |
131 | ||
132 | //_____________________________________________________________________________ | |
133 | void AliTRDv0::StepManager() | |
134 | { | |
135 | // | |
136 | // Procedure called at every step in the TRD | |
82bbf98a | 137 | // Fast simulator. If switched on, a hit is produced when a track |
138 | // crosses the border between amplification region and pad plane. | |
fe4da5cc | 139 | // |
140 | ||
82bbf98a | 141 | Int_t vol[3]; |
142 | Int_t iIdSens, icSens; | |
143 | Int_t iIdSpace, icSpace; | |
144 | Int_t iIdChamber, icChamber; | |
145 | ||
146 | Int_t secMap1[10] = { 3, 7, 8, 9, 10, 11, 2, 1, 18, 17 }; | |
147 | Int_t secMap2[ 5] = { 16, 15, 14, 13, 12 }; | |
148 | Int_t secMap3[ 3] = { 5, 6, 4 }; | |
149 | ||
150 | Float_t hits[4]; | |
fe4da5cc | 151 | |
0a6d8768 | 152 | TLorentzVector p; |
82bbf98a | 153 | TClonesArray &lhits = *fHits; |
fe4da5cc | 154 | |
82bbf98a | 155 | // Writing out hits enabled? |
156 | if (!(fHitsOn)) return; | |
fe4da5cc | 157 | |
fe4da5cc | 158 | // Use only charged tracks and count them only once per volume |
82bbf98a | 159 | if (gMC->TrackCharge() && |
160 | gMC->IsTrackExiting()) { | |
fe4da5cc | 161 | |
162 | // Check on sensitive volume | |
82bbf98a | 163 | iIdSens = gMC->CurrentVolID(icSens); |
164 | if (iIdSens == fIdSens) { | |
165 | ||
166 | gMC->TrackPosition(p); | |
167 | for (Int_t i = 0; i < 3; i++) hits[i] = p[i]; | |
168 | // No charge created | |
169 | hits[3] = 0; | |
170 | ||
171 | iIdSpace = gMC->CurrentVolOffID(4,icSpace ); | |
172 | iIdChamber = gMC->CurrentVolOffID(1,icChamber); | |
173 | ||
fe4da5cc | 174 | // The sector number |
82bbf98a | 175 | if (iIdSpace == fIdSpace1) |
176 | vol[0] = secMap1[icSpace-1]; | |
177 | else if (iIdSpace == fIdSpace2) | |
178 | vol[0] = secMap2[icSpace-1]; | |
179 | else if (iIdSpace == fIdSpace3) | |
180 | vol[0] = secMap3[icSpace-1]; | |
181 | ||
d3f347ff | 182 | // The chamber number |
183 | // 1: outer left | |
82bbf98a | 184 | // 2: middle left |
d3f347ff | 185 | // 3: inner |
82bbf98a | 186 | // 4: middle right |
d3f347ff | 187 | // 5: outer right |
82bbf98a | 188 | if (iIdChamber == fIdChamber1) |
189 | vol[1] = (hits[2] < 0 ? 1 : 5); | |
190 | else if (iIdChamber == fIdChamber2) | |
191 | vol[1] = (hits[2] < 0 ? 2 : 4); | |
192 | else if (iIdChamber == fIdChamber3) | |
d3f347ff | 193 | vol[1] = 3; |
82bbf98a | 194 | |
fe4da5cc | 195 | // The plane number |
82bbf98a | 196 | vol[2] = icChamber - TMath::Nint((Float_t) (icChamber / 7)) * 6; |
197 | ||
198 | new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits); | |
d3f347ff | 199 | |
fe4da5cc | 200 | } |
d3f347ff | 201 | |
fe4da5cc | 202 | } |
d3f347ff | 203 | |
fe4da5cc | 204 | } |