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fe4da5cc | 1 | /////////////////////////////////////////////////////////////////////////////// |
2 | // // | |
d3f347ff | 3 | // Transition Radiation Detector version 1 -- coarse simulation // |
4 | // This version has two detector arms, leaving the space in front of the // | |
5 | // HMPID and PHOS empty // | |
fe4da5cc | 6 | // // |
7 | //Begin_Html | |
8 | /* | |
1439f98e | 9 | <img src="picts/AliTRDv1Class.gif"> |
fe4da5cc | 10 | */ |
11 | //End_Html | |
12 | // // | |
13 | // // | |
14 | /////////////////////////////////////////////////////////////////////////////// | |
15 | ||
16 | #include <TMath.h> | |
17 | #include <TRandom.h> | |
18 | #include <TVector.h> | |
fe4da5cc | 19 | |
fe4da5cc | 20 | #include "AliTRDv1.h" |
21 | #include "AliRun.h" | |
fe4da5cc | 22 | #include "AliMC.h" |
d3f347ff | 23 | #include "AliConst.h" |
fe4da5cc | 24 | |
25 | ClassImp(AliTRDv1) | |
26 | ||
27 | //_____________________________________________________________________________ | |
28 | AliTRDv1::AliTRDv1(const char *name, const char *title) | |
29 | :AliTRD(name, title) | |
30 | { | |
31 | // | |
32 | // Standard constructor for the Transition Radiation Detector version 1 | |
33 | // | |
82bbf98a | 34 | |
35 | fIdSens = 0; | |
36 | fHitsOn = 0; | |
37 | ||
38 | fIdSpace1 = 0; | |
39 | fIdSpace2 = 0; | |
40 | fIdSpace3 = 0; | |
41 | ||
42 | fIdChamber1 = 0; | |
43 | fIdChamber2 = 0; | |
44 | fIdChamber3 = 0; | |
45 | ||
fe4da5cc | 46 | } |
47 | ||
48 | //_____________________________________________________________________________ | |
49 | void AliTRDv1::CreateGeometry() | |
50 | { | |
51 | // | |
82bbf98a | 52 | // Create the GEANT geometry for the Transition Radiation Detector - Version 1 |
53 | // This version covers only part of the azimuth. | |
d3f347ff | 54 | // |
82bbf98a | 55 | // Author: Christoph Blume (C.Blume@gsi.de) 20/07/99 |
d3f347ff | 56 | // |
57 | ||
82bbf98a | 58 | Float_t xpos, ypos, zpos; |
d3f347ff | 59 | |
82bbf98a | 60 | // Check that FRAME is there otherwise we have no place where to put the TRD |
61 | AliModule* FRAME = gAlice->GetModule("FRAME"); | |
62 | if (!FRAME) return; | |
d3f347ff | 63 | |
82bbf98a | 64 | // Define the chambers |
65 | AliTRD::CreateGeometry(); | |
d3f347ff | 66 | |
82bbf98a | 67 | // Position the the TRD-sectors only in one TRD-volume in the spaceframe |
68 | xpos = 0.; | |
69 | ypos = 0.; | |
70 | zpos = 0.; | |
71 | gMC->Gspos("TRD ",1,"BTR1",xpos,ypos,zpos,0,"ONLY"); | |
fe4da5cc | 72 | |
fe4da5cc | 73 | } |
74 | ||
75 | //_____________________________________________________________________________ | |
76 | void AliTRDv1::CreateMaterials() | |
77 | { | |
78 | // | |
79 | // Create materials for the Transition Radiation Detector version 1 | |
80 | // | |
82bbf98a | 81 | |
d3f347ff | 82 | AliTRD::CreateMaterials(); |
82bbf98a | 83 | |
fe4da5cc | 84 | } |
85 | ||
86 | //_____________________________________________________________________________ | |
87 | void AliTRDv1::Init() | |
88 | { | |
89 | // | |
90 | // Initialise the Transition Radiation Detector after the geometry is built | |
91 | // | |
82bbf98a | 92 | |
fe4da5cc | 93 | AliTRD::Init(); |
82bbf98a | 94 | |
95 | for (Int_t i = 0; i < 80; i++) printf("*"); | |
96 | printf("\n"); | |
97 | ||
98 | // Identifier of the sensitive volume (amplification region) | |
99 | fIdSens = gMC->VolId("UL06"); | |
100 | ||
101 | // Identifier of the TRD-spaceframe volumina | |
102 | fIdSpace1 = gMC->VolId("B028"); | |
103 | fIdSpace2 = gMC->VolId("B029"); | |
104 | fIdSpace3 = gMC->VolId("B030"); | |
105 | ||
106 | // Identifier of the TRD-driftchambers | |
107 | fIdChamber1 = gMC->VolId("UCIO"); | |
108 | fIdChamber2 = gMC->VolId("UCIM"); | |
109 | fIdChamber3 = gMC->VolId("UCII"); | |
110 | ||
fe4da5cc | 111 | } |
112 | ||
113 | //_____________________________________________________________________________ | |
114 | void AliTRDv1::StepManager() | |
115 | { | |
116 | // | |
d3f347ff | 117 | // Procedure called at every step in the TRD |
82bbf98a | 118 | // Fast simulator. If switched on, a hit is produced when a track |
119 | // crosses the border between amplification region and pad plane. | |
fe4da5cc | 120 | // |
d3f347ff | 121 | |
82bbf98a | 122 | Int_t vol[3]; |
123 | Int_t iIdSens, icSens; | |
124 | Int_t iIdSpace, icSpace; | |
125 | Int_t iIdChamber, icChamber; | |
126 | ||
127 | Int_t secMap1[10] = { 3, 7, 8, 9, 10, 11, 2, 1, 18, 17 }; | |
128 | Int_t secMap2[ 5] = { 16, 15, 14, 13, 12 }; | |
129 | Int_t secMap3[ 3] = { 5, 6, 4 }; | |
130 | ||
131 | Float_t hits[4]; | |
132 | ||
133 | TLorentzVector p; | |
134 | TClonesArray &lhits = *fHits; | |
135 | ||
136 | // Writing out hits enabled? | |
137 | if (!(fHitsOn)) return; | |
fe4da5cc | 138 | |
fe4da5cc | 139 | // Use only charged tracks and count them only once per volume |
82bbf98a | 140 | if (gMC->TrackCharge() && |
141 | gMC->IsTrackExiting()) { | |
fe4da5cc | 142 | |
143 | // Check on sensitive volume | |
82bbf98a | 144 | iIdSens = gMC->CurrentVolID(icSens); |
145 | if (iIdSens == fIdSens) { | |
146 | ||
147 | gMC->TrackPosition(p); | |
148 | for (Int_t i = 0; i < 3; i++) hits[i] = p[i]; | |
149 | // No charge created | |
150 | hits[3] = 0; | |
151 | ||
152 | iIdSpace = gMC->CurrentVolOffID(4,icSpace ); | |
153 | iIdChamber = gMC->CurrentVolOffID(1,icChamber); | |
fe4da5cc | 154 | |
fe4da5cc | 155 | // The sector number |
82bbf98a | 156 | if (iIdSpace == fIdSpace1) |
157 | vol[0] = secMap1[icSpace-1]; | |
158 | else if (iIdSpace == fIdSpace2) | |
159 | vol[0] = secMap2[icSpace-1]; | |
160 | else if (iIdSpace == fIdSpace3) | |
161 | vol[0] = secMap3[icSpace-1]; | |
162 | ||
d3f347ff | 163 | // The chamber number |
164 | // 1: outer left | |
82bbf98a | 165 | // 2: middle left |
d3f347ff | 166 | // 3: inner |
82bbf98a | 167 | // 4: middle right |
d3f347ff | 168 | // 5: outer right |
82bbf98a | 169 | if (iIdChamber == fIdChamber1) |
170 | vol[1] = (hits[2] < 0 ? 1 : 5); | |
171 | else if (iIdChamber == fIdChamber2) | |
172 | vol[1] = (hits[2] < 0 ? 2 : 4); | |
173 | else if (iIdChamber == fIdChamber3) | |
d3f347ff | 174 | vol[1] = 3; |
82bbf98a | 175 | |
fe4da5cc | 176 | // The plane number |
82bbf98a | 177 | vol[2] = icChamber - TMath::Nint((Float_t) (icChamber / 7)) * 6; |
178 | ||
179 | new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits); | |
d3f347ff | 180 | |
181 | } | |
182 | ||
82bbf98a | 183 | } |
d3f347ff | 184 | |
fe4da5cc | 185 | } |