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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. * | |
14 | **************************************************************************/ | |
15 | ||
16 | /* | |
17 | $Log$ | |
9de0700b | 18 | Revision 1.4 2000/10/02 16:34:28 barbera |
19 | Forward declarations added | |
20 | ||
1ca7869b | 21 | Revision 1.1.2.4 2000/10/02 16:03:20 barbera |
22 | Forward declarations added | |
23 | ||
24 | Revision 1.3 2000/09/22 12:44:34 nilsen | |
25 | Default track number set to -3 and not 0. | |
26 | ||
517784f0 | 27 | Revision 1.2 2000/07/10 16:07:19 fca |
28 | Release version of ITS code | |
29 | ||
e8189707 | 30 | */ |
31 | ||
32 | #include <TParticle.h> | |
33 | #include <TRandom.h> | |
34 | ||
e8189707 | 35 | #include "AliITS.h" |
517784f0 | 36 | #include "AliITShit.h" |
37 | #include "AliITSRecPoint.h" | |
38 | #include "AliITSmodule.h" | |
39 | #include "AliITSgeom.h" | |
e8189707 | 40 | #include "AliITSsimulationFastPointsV0.h" |
41 | #include "AliITSstatistics.h" | |
42 | ||
43 | ClassImp(AliITSsimulationFastPointsV0) | |
44 | ||
45 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0() | |
46 | { | |
9de0700b | 47 | // default constructor |
48 | fSx = 0; | |
49 | fSz = 0; | |
50 | } | |
51 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType){ | |
e8189707 | 52 | //constructor |
53 | fSx = new AliITSstatistics(2); | |
54 | fSz = new AliITSstatistics(2); | |
55 | } | |
56 | ||
57 | //---------------------------------------------------------- | |
58 | AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0() | |
59 | { | |
60 | //destructor | |
9de0700b | 61 | if(fSx) delete fSx; |
62 | if(fSz) delete fSz; | |
e8189707 | 63 | |
64 | } | |
65 | ||
66 | //------------------------------------------------------------- | |
67 | void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule *mod,Int_t module,TRandom *rndm){ | |
68 | // Fast points simulator for all of the ITS. | |
69 | Int_t nhit,h,trk,ifirst; | |
70 | Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx. | |
71 | Float_t x1,y1,z1; | |
72 | AliITShit *hit; | |
73 | ||
74 | fSx->Reset(); // Start out with things clearly zeroed | |
75 | fSz->Reset(); // Start out with things clearly zeroed | |
76 | e = 0.; // Start out with things clearly zeroed | |
77 | Double_t weight=1.; | |
78 | nhit = mod->GetNhits(); | |
79 | ifirst = 1; | |
80 | for(h=0;h<nhit;h++){ | |
81 | hit = mod->GetHit(h); | |
82 | hit->GetPositionL(x,y,z,t); | |
83 | if(ifirst) {x1=x;y1=y;z1=z;} | |
84 | e += hit->GetIonization(); | |
85 | trk = hit->GetTrack(); | |
86 | fSx->AddValue((Double_t)x,weight); | |
87 | fSz->AddValue((Double_t)z,weight); | |
88 | ifirst = 0; | |
89 | if(hit->StatusExiting()|| // leaving volume | |
90 | hit->StatusDisappeared()|| // interacted/decayed... | |
91 | hit->StatusStop() // dropped below E cuts. | |
92 | ){ // exiting track, write out RecPoint. | |
93 | // if(fSz->GetRMS()>1.E-1) { | |
94 | // TParticle *part = hit->GetParticle(); | |
95 | // printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy()); | |
96 | // printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1); | |
97 | // } | |
98 | switch (mod->GetLayer()){ | |
99 | case 1: case 2: // SPDs | |
100 | AddSPD(e,mod,trk); | |
101 | break; | |
102 | case 3: case 4: // SDDs | |
103 | AddSDD(e,mod,trk); | |
104 | break; | |
105 | case 5: case 6: // SSDs | |
106 | AddSSD(e,mod,trk); | |
107 | break; | |
108 | } // end switch | |
109 | fSx->Reset(); | |
110 | fSz->Reset(); | |
111 | e = 0.; | |
112 | ifirst = 1; | |
113 | continue; | |
114 | }// end if | |
115 | } // end for h | |
116 | } | |
117 | //_______________________________________________________________________ | |
118 | void AliITSsimulationFastPointsV0::AddSPD(Float_t &e, | |
119 | AliITSmodule *mod,Int_t trackNumber){ | |
120 | const Float_t kmicronTocm = 1.0e-4; | |
121 | // const Float_t kdEdXtoQ = ; | |
122 | const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
123 | const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
124 | Float_t a1,a2; // general float. | |
125 | AliITSRecPoint rpSPD; | |
126 | ||
127 | rpSPD.fTracks[0]=trackNumber; | |
517784f0 | 128 | rpSPD.fTracks[1]=-3; |
129 | rpSPD.fTracks[2]=-3; | |
e8189707 | 130 | rpSPD.SetX(fSx->GetMean()); |
131 | rpSPD.SetZ(fSz->GetMean()); | |
132 | rpSPD.SetdEdX(0.0); | |
133 | rpSPD.SetQ(1.0); | |
134 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
135 | // if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
136 | // mod->GetLayer(),trackNumber,e,a1); | |
137 | rpSPD.SetSigmaX2(a1); | |
138 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
139 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
140 | rpSPD.SetSigmaZ2(a2); | |
e8189707 | 141 | |
142 | (mod->GetITS())->AddRecPoint(rpSPD); | |
143 | } | |
144 | //_______________________________________________________________________ | |
145 | void AliITSsimulationFastPointsV0::AddSDD(Float_t &e, | |
146 | AliITSmodule *mod,Int_t trackNumber){ | |
147 | ||
148 | const Float_t kmicronTocm = 1.0e-4; | |
149 | const Float_t kdEdXtoQ = 2.778e+8; | |
150 | const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
151 | const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
152 | Float_t a1,a2; // general float. | |
153 | AliITSRecPoint rpSDD; | |
154 | ||
155 | rpSDD.fTracks[0]=trackNumber; | |
517784f0 | 156 | rpSDD.fTracks[1]=-3; |
157 | rpSDD.fTracks[2]=-3; | |
e8189707 | 158 | rpSDD.SetX(fSx->GetMean()); |
159 | rpSDD.SetZ(fSz->GetMean()); | |
160 | rpSDD.SetdEdX(e); | |
161 | rpSDD.SetQ(kdEdXtoQ*e); | |
162 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
163 | // if(a1>1.E5) printf("addSDD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
164 | // mod->GetLayer(),trackNumber,e,a1); | |
165 | rpSDD.SetSigmaX2(a1); | |
166 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
167 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
168 | rpSDD.SetSigmaZ2(a2); | |
e8189707 | 169 | |
170 | (mod->GetITS())->AddRecPoint(rpSDD); | |
171 | } | |
172 | //_______________________________________________________________________ | |
173 | void AliITSsimulationFastPointsV0::AddSSD(Float_t &e, | |
174 | AliITSmodule *mod,Int_t trackNumber){ | |
175 | ||
176 | const Float_t kmicronTocm = 1.0e-4; | |
177 | const Float_t kdEdXtoQ = 2.778e+8; | |
178 | const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
179 | const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
180 | Float_t a1,a2; // general float. | |
181 | AliITSRecPoint rpSSD; | |
182 | ||
183 | rpSSD.fTracks[0]=trackNumber; | |
517784f0 | 184 | rpSSD.fTracks[1]=-3; |
185 | rpSSD.fTracks[2]=-3; | |
e8189707 | 186 | rpSSD.SetX(fSx->GetMean()); |
187 | rpSSD.SetZ(fSz->GetMean()); | |
188 | rpSSD.SetdEdX(e); | |
189 | rpSSD.SetQ(kdEdXtoQ*e); | |
190 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
191 | // if(a1>1.E5) printf("addSSD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
192 | // mod->GetLayer(),trackNumber,e,a1); | |
193 | rpSSD.SetSigmaX2(a1); | |
194 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
195 | // if(a1>1.E5) printf(" sigmaZ2= %e RMSx=%e RMSz=%e\n",a2,fSx->GetRMS(),fSz->GetRMS()); | |
196 | rpSSD.SetSigmaZ2(a2); | |
e8189707 | 197 | |
198 | (mod->GetITS())->AddRecPoint(rpSSD); | |
199 | } | |
200 | //_______________________________________________________________________ | |
201 |