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