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b0f5e3fc | 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 | /* $Id$ */ |
7d62fb64 | 17 | ////////////////////////////////////////////////////////// |
18 | // implements fast simulation // | |
19 | // // | |
20 | // // | |
21 | ////////////////////////////////////////////////////////// | |
22 | ||
b9d0a01d | 23 | |
e8189707 | 24 | #include <TRandom.h> |
b0f5e3fc | 25 | |
b0f5e3fc | 26 | #include "AliITS.h" |
517784f0 | 27 | #include "AliITShit.h" |
28 | #include "AliITSRecPoint.h" | |
29 | #include "AliITSmodule.h" | |
30 | #include "AliITSgeom.h" | |
e8189707 | 31 | #include "AliRun.h" |
b0f5e3fc | 32 | #include "AliITSsimulationFastPoints.h" |
e8189707 | 33 | |
b0f5e3fc | 34 | |
35 | ClassImp(AliITSsimulationFastPoints) | |
36 | ||
37 | AliITSsimulationFastPoints::AliITSsimulationFastPoints() | |
38 | { | |
39 | //constructor | |
e8189707 | 40 | fSigmaRPhi[0] = fSigmaRPhi[1] = 12e-4; |
41 | fSigmaRPhi[2] = fSigmaRPhi[3] = 38e-4; | |
42 | fSigmaRPhi[4] = fSigmaRPhi[5] = 20e-4; | |
21d3c626 | 43 | fSigmaZ[0] = fSigmaZ[1] = 120e-4; // resolution for 425 micron pixels |
e8189707 | 44 | fSigmaZ[2] = fSigmaZ[3] = 28e-4; |
45 | fSigmaZ[4] = fSigmaZ[5] = 830e-4; | |
46 | fSigmaDe[0] = fSigmaDe[1] = 0.72e-6; | |
47 | fSigmaDe[2] = fSigmaDe[3] = 0.90e-6; | |
48 | fSigmaDe[4] = fSigmaDe[5] = 5e-6; | |
49 | fThrDe[0] = fThrDe[1] = 7.2e-6; | |
50 | fThrDe[2] = fThrDe[3] = 2.70e-6; | |
51 | fThrDe[4] = fThrDe[5] = 10e-6; | |
b0f5e3fc | 52 | } |
53 | ||
e8189707 | 54 | //------------------------------------------------------------- |
7d62fb64 | 55 | void AliITSsimulationFastPoints::CreateFastRecPoints(Int_t module, TClonesArray* recp){ |
785086f0 | 56 | // Fast points simulator |
57 | AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
b0f5e3fc | 58 | |
785086f0 | 59 | CreateFastRecPoints((AliITSmodule *)(aliITS->GetModule(module)), |
7d62fb64 | 60 | module,gRandom,recp); |
785086f0 | 61 | } |
62 | //------------------------------------------------------------- | |
63 | void AliITSsimulationFastPoints::CreateFastRecPoints(AliITSmodule *mod, | |
64 | Int_t module, | |
7d62fb64 | 65 | TRandom *random, |
66 | TClonesArray* recp) { | |
67 | // Fast points simulator | |
68 | ||
69 | TClonesArray &pt=*recp; | |
70 | AliITS *aliITS = (AliITS*)gAlice->GetModule("ITS"); | |
71 | AliITSgeom *gm = aliITS->GetITSgeom(); | |
add4a588 | 72 | const Float_t kdEdXtoQ = 1.0e+6; // GeV->KeV |
7d62fb64 | 73 | |
00a7cc50 | 74 | Int_t lay,lad,det; |
75 | gm->GetModuleId(module,lay,lad,det); | |
76 | Int_t ind=(lad-1)*gm->GetNdetectors(lay)+(det-1); | |
77 | Int_t lyr=(lay-1); | |
78 | ||
79 | ||
7d62fb64 | 80 | Int_t ihit,flag,numofhits; |
81 | Float_t locals[3]; | |
82 | Float_t globals[3]; | |
83 | Double_t sigmarphi=0., sigmaz=0., sigmade=0., thrde=0.; | |
84 | Float_t deltaXl,deltaZl,deltaDe; | |
85 | ||
86 | Int_t hitlay, hitlad, hitdet, hitstatus; | |
87 | Float_t hitpx, hitpy, hitpz, hitdestep; | |
88 | ||
89 | Int_t hitstatus1, hittrack1; | |
90 | Float_t hitx1, hity1, hitz1; | |
91 | Float_t hitdestep1; | |
92 | Float_t xMg,yMg,zMg; | |
93 | Int_t irecp=0; | |
94 | numofhits = mod->GetNhits(); | |
95 | //printf("numofhits %d \n",numofhits); | |
96 | for(ihit=0;ihit<numofhits;ihit++){ | |
97 | AliITShit *hit=mod->GetHit(ihit); | |
98 | hit->GetPositionG(hitx1,hity1,hitz1); | |
99 | hitstatus1 = hit->GetTrackStatus(); | |
100 | hitdestep1 = hit->GetIonization(); | |
101 | hittrack1 = hit->GetTrack(); | |
102 | ||
103 | mod->MedianHit(module,hitx1,hity1,hitz1,hitstatus1,xMg,yMg,zMg,flag); | |
104 | if (flag!=1) { | |
105 | hitdestep = hit->GetIonization(); | |
106 | ||
107 | if (hitdestep > 0) { | |
108 | hit->GetDetectorID(hitlay,hitlad,hitdet); | |
109 | hit->GetMomentumG(hitpx,hitpy,hitpz); | |
110 | hitstatus = hitstatus1; | |
785086f0 | 111 | // Transform to the module local frame |
7d62fb64 | 112 | globals[0] = xMg; |
113 | globals[1] = yMg; | |
114 | globals[2] = zMg; | |
115 | gm->GtoL(hitlay,hitlad,hitdet,globals,locals); | |
116 | // Retrieve sigma values for position and energy, and energy | |
117 | // threshold | |
118 | sigmarphi = SigmaRPhi(hitlay); | |
119 | sigmaz = SigmaZ(hitlay); | |
120 | sigmade = SigmaDe(hitlay); | |
121 | thrde = ThrDe(hitlay); | |
122 | deltaXl = random->Gaus(0,sigmarphi); | |
123 | deltaZl = random->Gaus(0,sigmaz); | |
124 | deltaDe = random->Gaus(0,sigmade); | |
125 | ||
126 | // Apply energy threshold and trasform back to global reference | |
127 | // system | |
128 | ||
129 | if ( (hitdestep+deltaDe) > thrde ){ | |
130 | locals[0] += deltaXl; | |
131 | locals[2] += deltaZl; | |
75fb37cc | 132 | Int_t lab[4] = {hit->GetTrack(),-3,-3,ind}; |
add4a588 | 133 | Float_t q=kdEdXtoQ*(hitdestep+deltaDe); |
134 | if(hitlay<3) q=1.; // SPD binary readout | |
8c4c0abf | 135 | Float_t hitv[6] = {locals[0],locals[2],sigmarphi*sigmarphi,sigmaz*sigmaz,q,q}; |
75fb37cc | 136 | Int_t info[3] = {0,0,lyr}; |
3162e1f9 | 137 | AliITSRecPoint rp(lab,hitv,info,kTRUE); |
75fb37cc | 138 | |
7d62fb64 | 139 | new (pt[irecp]) AliITSRecPoint(rp); |
140 | irecp++; | |
141 | } // end if ( (hitdestep+deltaDe) | |
142 | } // end if (hitdestep > 0) | |
143 | } // end if (flag!=1) | |
144 | } // end for ihit | |
b0f5e3fc | 145 | } |
e8189707 | 146 | //_______________________________________________________________________ |
147 | void AliITSsimulationFastPoints::SetSigmaRPhi(Double_t srphi[6]) | |
148 | { | |
149 | // set sigmas in rphi | |
b0f5e3fc | 150 | |
e8189707 | 151 | Int_t i; |
152 | for (i=0; i<6; i++) { | |
153 | fSigmaRPhi[i]=srphi[i]; | |
154 | } | |
b0f5e3fc | 155 | } |
156 | //_______________________________________________________________________ | |
e8189707 | 157 | void AliITSsimulationFastPoints::SetSigmaZ(Double_t sz[6]) |
158 | { | |
159 | // set sigmas in z | |
160 | ||
161 | Int_t i; | |
162 | for (i=0; i<6; i++) { | |
163 | fSigmaZ[i]=sz[i]; | |
164 | } | |
b0f5e3fc | 165 | } |
166 | //_______________________________________________________________________ | |
e8189707 | 167 | void AliITSsimulationFastPoints::SetSigmaDe(Double_t sde[6]) |
168 | { | |
169 | // set sigmas in energy | |
170 | ||
171 | Int_t i; | |
172 | for (i=0; i<6; i++) { | |
173 | fSigmaDe[i]=sde[i]; | |
174 | } | |
b0f5e3fc | 175 | } |
176 | //_______________________________________________________________________ | |
e8189707 | 177 | void AliITSsimulationFastPoints::SetThrDe(Double_t thrde[6]) |
178 | { | |
179 | // set energy thersholds | |
180 | ||
181 | Int_t i; | |
182 | for (i=0; i<6; i++) { | |
183 | fThrDe[i]=thrde[i]; | |
184 | } | |
b0f5e3fc | 185 | } |
e8189707 | 186 |