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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 | $Log$ | |
18 | */ | |
19 | ||
20 | #include <TParticle.h> | |
21 | #include <TRandom.h> | |
22 | ||
23 | ||
24 | #include "AliITS.h" | |
25 | #include "AliITSsimulationFastPointsV0.h" | |
26 | #include "AliITSstatistics.h" | |
27 | ||
28 | ClassImp(AliITSsimulationFastPointsV0) | |
29 | ||
30 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0() | |
31 | { | |
32 | //constructor | |
33 | fSx = new AliITSstatistics(2); | |
34 | fSz = new AliITSstatistics(2); | |
35 | } | |
36 | ||
37 | //---------------------------------------------------------- | |
38 | AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0() | |
39 | { | |
40 | //destructor | |
41 | delete fSx; | |
42 | delete fSz; | |
43 | ||
44 | } | |
45 | ||
46 | //------------------------------------------------------------- | |
47 | void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule *mod,Int_t module,TRandom *rndm){ | |
48 | // Fast points simulator for all of the ITS. | |
49 | Int_t nhit,h,trk,ifirst; | |
50 | Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx. | |
51 | Float_t x1,y1,z1; | |
52 | AliITShit *hit; | |
53 | ||
54 | fSx->Reset(); // Start out with things clearly zeroed | |
55 | fSz->Reset(); // Start out with things clearly zeroed | |
56 | e = 0.; // Start out with things clearly zeroed | |
57 | Double_t weight=1.; | |
58 | nhit = mod->GetNhits(); | |
59 | ifirst = 1; | |
60 | for(h=0;h<nhit;h++){ | |
61 | hit = mod->GetHit(h); | |
62 | hit->GetPositionL(x,y,z,t); | |
63 | if(ifirst) {x1=x;y1=y;z1=z;} | |
64 | e += hit->GetIonization(); | |
65 | trk = hit->GetTrack(); | |
66 | fSx->AddValue((Double_t)x,weight); | |
67 | fSz->AddValue((Double_t)z,weight); | |
68 | ifirst = 0; | |
69 | if(hit->StatusExiting()|| // leaving volume | |
70 | hit->StatusDisappeared()|| // interacted/decayed... | |
71 | hit->StatusStop() // dropped below E cuts. | |
72 | ){ // exiting track, write out RecPoint. | |
73 | // if(fSz->GetRMS()>1.E-1) { | |
74 | // TParticle *part = hit->GetParticle(); | |
75 | // printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy()); | |
76 | // printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1); | |
77 | // } | |
78 | switch (mod->GetLayer()){ | |
79 | case 1: case 2: // SPDs | |
80 | AddSPD(e,mod,trk); | |
81 | break; | |
82 | case 3: case 4: // SDDs | |
83 | AddSDD(e,mod,trk); | |
84 | break; | |
85 | case 5: case 6: // SSDs | |
86 | AddSSD(e,mod,trk); | |
87 | break; | |
88 | } // end switch | |
89 | fSx->Reset(); | |
90 | fSz->Reset(); | |
91 | e = 0.; | |
92 | ifirst = 1; | |
93 | continue; | |
94 | }// end if | |
95 | } // end for h | |
96 | } | |
97 | //_______________________________________________________________________ | |
98 | void AliITSsimulationFastPointsV0::AddSPD(Float_t &e, | |
99 | AliITSmodule *mod,Int_t trackNumber){ | |
100 | const Float_t kmicronTocm = 1.0e-4; | |
101 | // const Float_t kdEdXtoQ = ; | |
102 | const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
103 | const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
104 | Float_t a1,a2; // general float. | |
105 | AliITSRecPoint rpSPD; | |
106 | ||
107 | rpSPD.fTracks[0]=trackNumber; | |
108 | rpSPD.fTracks[1]=0; | |
109 | rpSPD.fTracks[2]=0; | |
110 | rpSPD.SetX(fSx->GetMean()); | |
111 | rpSPD.SetZ(fSz->GetMean()); | |
112 | rpSPD.SetdEdX(0.0); | |
113 | rpSPD.SetQ(1.0); | |
114 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
115 | // if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
116 | // mod->GetLayer(),trackNumber,e,a1); | |
117 | rpSPD.SetSigmaX2(a1); | |
118 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
119 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
120 | rpSPD.SetSigmaZ2(a2); | |
121 | rpSPD.SetProbability(1.0); | |
122 | ||
123 | (mod->GetITS())->AddRecPoint(rpSPD); | |
124 | } | |
125 | //_______________________________________________________________________ | |
126 | void AliITSsimulationFastPointsV0::AddSDD(Float_t &e, | |
127 | AliITSmodule *mod,Int_t trackNumber){ | |
128 | ||
129 | const Float_t kmicronTocm = 1.0e-4; | |
130 | const Float_t kdEdXtoQ = 2.778e+8; | |
131 | const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
132 | const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
133 | Float_t a1,a2; // general float. | |
134 | AliITSRecPoint rpSDD; | |
135 | ||
136 | rpSDD.fTracks[0]=trackNumber; | |
137 | rpSDD.fTracks[1]=0; | |
138 | rpSDD.fTracks[2]=0; | |
139 | rpSDD.SetX(fSx->GetMean()); | |
140 | rpSDD.SetZ(fSz->GetMean()); | |
141 | rpSDD.SetdEdX(e); | |
142 | rpSDD.SetQ(kdEdXtoQ*e); | |
143 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
144 | // if(a1>1.E5) printf("addSDD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
145 | // mod->GetLayer(),trackNumber,e,a1); | |
146 | rpSDD.SetSigmaX2(a1); | |
147 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
148 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
149 | rpSDD.SetSigmaZ2(a2); | |
150 | rpSDD.SetProbability(1.0); | |
151 | ||
152 | (mod->GetITS())->AddRecPoint(rpSDD); | |
153 | } | |
154 | //_______________________________________________________________________ | |
155 | void AliITSsimulationFastPointsV0::AddSSD(Float_t &e, | |
156 | AliITSmodule *mod,Int_t trackNumber){ | |
157 | ||
158 | const Float_t kmicronTocm = 1.0e-4; | |
159 | const Float_t kdEdXtoQ = 2.778e+8; | |
160 | const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
161 | const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
162 | Float_t a1,a2; // general float. | |
163 | AliITSRecPoint rpSSD; | |
164 | ||
165 | rpSSD.fTracks[0]=trackNumber; | |
166 | rpSSD.fTracks[1]=0; | |
167 | rpSSD.fTracks[2]=0; | |
168 | rpSSD.SetX(fSx->GetMean()); | |
169 | rpSSD.SetZ(fSz->GetMean()); | |
170 | rpSSD.SetdEdX(e); | |
171 | rpSSD.SetQ(kdEdXtoQ*e); | |
172 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
173 | // if(a1>1.E5) printf("addSSD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
174 | // mod->GetLayer(),trackNumber,e,a1); | |
175 | rpSSD.SetSigmaX2(a1); | |
176 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
177 | // if(a1>1.E5) printf(" sigmaZ2= %e RMSx=%e RMSz=%e\n",a2,fSx->GetRMS(),fSz->GetRMS()); | |
178 | rpSSD.SetSigmaZ2(a2); | |
179 | rpSSD.SetProbability(1.0); | |
180 | ||
181 | (mod->GetITS())->AddRecPoint(rpSSD); | |
182 | } | |
183 | //_______________________________________________________________________ | |
184 |