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e8189707 | 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. * | |
7d62fb64 | 14 | ***********************************************************************/ |
e8189707 | 15 | |
803d1ab0 | 16 | /* $Id$ */ |
7d62fb64 | 17 | ///////////////////////////////////////////////////////// |
18 | // fast simulation V0 // | |
19 | // // | |
20 | // // | |
21 | ///////////////////////////////////////////////////////// | |
e8189707 | 22 | |
e8189707 | 23 | #include "AliITS.h" |
517784f0 | 24 | #include "AliITShit.h" |
25 | #include "AliITSRecPoint.h" | |
26 | #include "AliITSmodule.h" | |
e8189707 | 27 | #include "AliITSsimulationFastPointsV0.h" |
28 | #include "AliITSstatistics.h" | |
29 | ||
30 | ClassImp(AliITSsimulationFastPointsV0) | |
31 | ||
7537d03c | 32 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(): |
33 | fNrecp(0), | |
34 | fSx(0), | |
35 | fSz(0){ | |
9de0700b | 36 | // default constructor |
9de0700b | 37 | } |
7537d03c | 38 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType): |
39 | fNrecp(0), | |
40 | fSx(0), | |
41 | fSz(0){ | |
e8189707 | 42 | //constructor |
d0df5576 | 43 | Info("AliITSsimulationFastPointsV0","Standard constructor %s",dataType); |
e8189707 | 44 | fSx = new AliITSstatistics(2); |
45 | fSz = new AliITSstatistics(2); | |
46 | } | |
7d62fb64 | 47 | //______________________________________________________________________ |
7537d03c | 48 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const AliITSsimulationFastPointsV0 & rec):AliITSsimulation(rec), |
49 | fNrecp(rec.fNrecp), | |
50 | fSx(rec.fSx), | |
51 | fSz(rec.fSz){ | |
7d62fb64 | 52 | // Copy constructor. |
53 | ||
7d62fb64 | 54 | } |
55 | //______________________________________________________________________ | |
7537d03c | 56 | AliITSsimulationFastPointsV0& AliITSsimulationFastPointsV0::operator=(const AliITSsimulationFastPointsV0& /*source*/){ |
57 | // Assignment operator | |
58 | Error("operator=","Assignment operator not allowed"); | |
59 | return *this; | |
7d62fb64 | 60 | } |
e8189707 | 61 | |
62 | //---------------------------------------------------------- | |
63 | AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0() | |
64 | { | |
65 | //destructor | |
9de0700b | 66 | if(fSx) delete fSx; |
67 | if(fSz) delete fSz; | |
e8189707 | 68 | |
69 | } | |
70 | ||
71 | //------------------------------------------------------------- | |
7d62fb64 | 72 | void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule *mod,Int_t module,TRandom *rndm, TClonesArray* recp) { |
e8189707 | 73 | // Fast points simulator for all of the ITS. |
7d62fb64 | 74 | |
e8189707 | 75 | Int_t nhit,h,trk,ifirst; |
76 | Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx. | |
77 | Float_t x1,y1,z1; | |
78 | AliITShit *hit; | |
79 | ||
ac74f489 | 80 | if(rndm!=0) module=0; // fix unsued parameter warnings. |
e8189707 | 81 | fSx->Reset(); // Start out with things clearly zeroed |
82 | fSz->Reset(); // Start out with things clearly zeroed | |
83 | e = 0.; // Start out with things clearly zeroed | |
84 | Double_t weight=1.; | |
85 | nhit = mod->GetNhits(); | |
86 | ifirst = 1; | |
87 | for(h=0;h<nhit;h++){ | |
88 | hit = mod->GetHit(h); | |
89 | hit->GetPositionL(x,y,z,t); | |
90 | if(ifirst) {x1=x;y1=y;z1=z;} | |
91 | e += hit->GetIonization(); | |
92 | trk = hit->GetTrack(); | |
93 | fSx->AddValue((Double_t)x,weight); | |
94 | fSz->AddValue((Double_t)z,weight); | |
95 | ifirst = 0; | |
96 | if(hit->StatusExiting()|| // leaving volume | |
97 | hit->StatusDisappeared()|| // interacted/decayed... | |
98 | hit->StatusStop() // dropped below E cuts. | |
99 | ){ // exiting track, write out RecPoint. | |
100 | // if(fSz->GetRMS()>1.E-1) { | |
101 | // TParticle *part = hit->GetParticle(); | |
102 | // printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy()); | |
103 | // printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1); | |
104 | // } | |
105 | switch (mod->GetLayer()){ | |
106 | case 1: case 2: // SPDs | |
7d62fb64 | 107 | AddSPD(e,mod,trk,recp); |
e8189707 | 108 | break; |
109 | case 3: case 4: // SDDs | |
7d62fb64 | 110 | AddSDD(e,mod,trk,recp); |
e8189707 | 111 | break; |
112 | case 5: case 6: // SSDs | |
7d62fb64 | 113 | AddSSD(e,mod,trk,recp); |
e8189707 | 114 | break; |
115 | } // end switch | |
116 | fSx->Reset(); | |
117 | fSz->Reset(); | |
118 | e = 0.; | |
119 | ifirst = 1; | |
120 | continue; | |
121 | }// end if | |
122 | } // end for h | |
123 | } | |
124 | //_______________________________________________________________________ | |
125 | void AliITSsimulationFastPointsV0::AddSPD(Float_t &e, | |
00a7cc50 | 126 | AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){ |
d2f55a22 | 127 | // |
7d62fb64 | 128 | TClonesArray &pt=*recp; |
e8189707 | 129 | const Float_t kmicronTocm = 1.0e-4; |
130 | // const Float_t kdEdXtoQ = ; | |
131 | const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
132 | const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
00a7cc50 | 133 | |
75fb37cc | 134 | Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()}; |
135 | Float_t a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
e8189707 | 136 | // if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ", |
137 | // mod->GetLayer(),trackNumber,e,a1); | |
75fb37cc | 138 | Float_t a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; |
e8189707 | 139 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); |
75fb37cc | 140 | Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,1.0}; |
141 | Int_t info[3] = {0,0,mod->GetLayer()}; | |
142 | ||
143 | AliITSRecPoint rpSPD(lab,hit,info,kTRUE); | |
144 | rpSPD.SetdEdX(e); | |
145 | ||
7d62fb64 | 146 | new (pt[fNrecp]) AliITSRecPoint(rpSPD); |
147 | fNrecp++; | |
e8189707 | 148 | } |
149 | //_______________________________________________________________________ | |
150 | void AliITSsimulationFastPointsV0::AddSDD(Float_t &e, | |
00a7cc50 | 151 | AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){ |
d2f55a22 | 152 | // |
7d62fb64 | 153 | TClonesArray &pt=*recp; |
e8189707 | 154 | const Float_t kmicronTocm = 1.0e-4; |
155 | const Float_t kdEdXtoQ = 2.778e+8; | |
156 | const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
157 | const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
e8189707 | 158 | |
75fb37cc | 159 | Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()}; |
160 | Float_t a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
161 | // if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
e8189707 | 162 | // mod->GetLayer(),trackNumber,e,a1); |
75fb37cc | 163 | Float_t a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; |
e8189707 | 164 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); |
75fb37cc | 165 | Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,kdEdXtoQ*e}; |
166 | Int_t info[3] = {0,0,mod->GetLayer()}; | |
167 | ||
168 | AliITSRecPoint rpSDD(lab,hit,info,kTRUE); | |
169 | rpSDD.SetdEdX(e); | |
170 | ||
7d62fb64 | 171 | new (pt[fNrecp]) AliITSRecPoint(rpSDD); |
172 | fNrecp++; | |
173 | ||
e8189707 | 174 | } |
175 | //_______________________________________________________________________ | |
176 | void AliITSsimulationFastPointsV0::AddSSD(Float_t &e, | |
00a7cc50 | 177 | AliITSmodule* mod,Int_t trackNumber,TClonesArray* recp){ |
d2f55a22 | 178 | // |
7d62fb64 | 179 | TClonesArray &pt=*recp; |
e8189707 | 180 | const Float_t kmicronTocm = 1.0e-4; |
181 | const Float_t kdEdXtoQ = 2.778e+8; | |
182 | const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
183 | const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
e8189707 | 184 | |
75fb37cc | 185 | Int_t lab[4] = {trackNumber,-3,-3,mod->GetIndex()}; |
186 | Float_t a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
187 | // if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
188 | // mod->GetLayer(),trackNumber,e,a1); | |
189 | Float_t a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
190 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
191 | Float_t hit[5] = {fSx->GetMean(),fSz->GetMean(),a1,a2,kdEdXtoQ*e}; | |
192 | Int_t info[3] = {0,0,mod->GetLayer()}; | |
00a7cc50 | 193 | |
75fb37cc | 194 | AliITSRecPoint rpSSD(lab,hit,info,kTRUE); |
e8189707 | 195 | rpSSD.SetdEdX(e); |
75fb37cc | 196 | |
7d62fb64 | 197 | new (pt[fNrecp]) AliITSRecPoint(rpSSD); |
198 | fNrecp++; | |
199 | ||
200 | ||
e8189707 | 201 | } |
202 | //_______________________________________________________________________ | |
203 |