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1 | /////////////////////////////////////////////////////////////////////////////// |
2 | // // |
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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 // |
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6 | // // |
7 | //Begin_Html |
8 | /* |
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9 | <img src="picts/AliTRDv1Class.gif"> |
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10 | */ |
11 | //End_Html |
12 | // // |
13 | // // |
14 | /////////////////////////////////////////////////////////////////////////////// |
15 | |
16 | #include <TMath.h> |
17 | #include <TRandom.h> |
18 | #include <TVector.h> |
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19 | |
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20 | #include "AliTRDv1.h" |
21 | #include "AliRun.h" |
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22 | #include "AliMC.h" |
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23 | #include "AliConst.h" |
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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 | // |
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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 | |
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46 | } |
47 | |
48 | //_____________________________________________________________________________ |
49 | void AliTRDv1::CreateGeometry() |
50 | { |
51 | // |
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52 | // Create the GEANT geometry for the Transition Radiation Detector - Version 1 |
53 | // This version covers only part of the azimuth. |
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54 | // |
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55 | // Author: Christoph Blume (C.Blume@gsi.de) 20/07/99 |
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56 | // |
57 | |
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58 | Float_t xpos, ypos, zpos; |
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59 | |
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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; |
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63 | |
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64 | // Define the chambers |
65 | AliTRD::CreateGeometry(); |
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66 | |
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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"); |
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72 | |
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73 | } |
74 | |
75 | //_____________________________________________________________________________ |
76 | void AliTRDv1::CreateMaterials() |
77 | { |
78 | // |
79 | // Create materials for the Transition Radiation Detector version 1 |
80 | // |
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81 | |
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82 | AliTRD::CreateMaterials(); |
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83 | |
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84 | } |
85 | |
86 | //_____________________________________________________________________________ |
87 | void AliTRDv1::Init() |
88 | { |
89 | // |
90 | // Initialise the Transition Radiation Detector after the geometry is built |
91 | // |
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92 | |
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93 | AliTRD::Init(); |
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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 | |
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111 | } |
112 | |
113 | //_____________________________________________________________________________ |
114 | void AliTRDv1::StepManager() |
115 | { |
116 | // |
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117 | // Procedure called at every step in the TRD |
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118 | // Fast simulator. If switched on, a hit is produced when a track |
119 | // crosses the border between amplification region and pad plane. |
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120 | // |
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121 | |
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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; |
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138 | |
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139 | // Use only charged tracks and count them only once per volume |
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140 | if (gMC->TrackCharge() && |
141 | gMC->IsTrackExiting()) { |
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142 | |
143 | // Check on sensitive volume |
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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); |
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154 | |
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155 | // The sector number |
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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 | |
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163 | // The chamber number |
164 | // 1: outer left |
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165 | // 2: middle left |
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166 | // 3: inner |
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167 | // 4: middle right |
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168 | // 5: outer right |
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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) |
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174 | vol[1] = 3; |
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175 | |
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176 | // The plane number |
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177 | vol[2] = icChamber - TMath::Nint((Float_t) (icChamber / 7)) * 6; |
178 | |
179 | new(lhits[fNhits++]) AliTRDhit(fIshunt,gAlice->CurrentTrack(),vol,hits); |
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180 | |
181 | } |
182 | |
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183 | } |
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184 | |
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185 | } |