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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 | ||
803d1ab0 | 16 | /* $Id$ */ |
e8189707 | 17 | |
18 | #include <TParticle.h> | |
19 | #include <TRandom.h> | |
20 | ||
e8189707 | 21 | #include "AliITS.h" |
517784f0 | 22 | #include "AliITShit.h" |
23 | #include "AliITSRecPoint.h" | |
24 | #include "AliITSmodule.h" | |
25 | #include "AliITSgeom.h" | |
e8189707 | 26 | #include "AliITSsimulationFastPointsV0.h" |
27 | #include "AliITSstatistics.h" | |
28 | ||
29 | ClassImp(AliITSsimulationFastPointsV0) | |
30 | ||
31 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0() | |
32 | { | |
9de0700b | 33 | // default constructor |
34 | fSx = 0; | |
35 | fSz = 0; | |
36 | } | |
37 | AliITSsimulationFastPointsV0::AliITSsimulationFastPointsV0(const char *dataType){ | |
e8189707 | 38 | //constructor |
39 | fSx = new AliITSstatistics(2); | |
40 | fSz = new AliITSstatistics(2); | |
41 | } | |
42 | ||
43 | //---------------------------------------------------------- | |
44 | AliITSsimulationFastPointsV0::~AliITSsimulationFastPointsV0() | |
45 | { | |
46 | //destructor | |
9de0700b | 47 | if(fSx) delete fSx; |
48 | if(fSz) delete fSz; | |
e8189707 | 49 | |
50 | } | |
51 | ||
52 | //------------------------------------------------------------- | |
53 | void AliITSsimulationFastPointsV0::CreateFastRecPoints(AliITSmodule *mod,Int_t module,TRandom *rndm){ | |
54 | // Fast points simulator for all of the ITS. | |
55 | Int_t nhit,h,trk,ifirst; | |
56 | Float_t x,y,z,t,e;// local coordinate (cm) and time of flight, and dedx. | |
57 | Float_t x1,y1,z1; | |
58 | AliITShit *hit; | |
59 | ||
ac74f489 | 60 | if(rndm!=0) module=0; // fix unsued parameter warnings. |
e8189707 | 61 | fSx->Reset(); // Start out with things clearly zeroed |
62 | fSz->Reset(); // Start out with things clearly zeroed | |
63 | e = 0.; // Start out with things clearly zeroed | |
64 | Double_t weight=1.; | |
65 | nhit = mod->GetNhits(); | |
66 | ifirst = 1; | |
67 | for(h=0;h<nhit;h++){ | |
68 | hit = mod->GetHit(h); | |
69 | hit->GetPositionL(x,y,z,t); | |
70 | if(ifirst) {x1=x;y1=y;z1=z;} | |
71 | e += hit->GetIonization(); | |
72 | trk = hit->GetTrack(); | |
73 | fSx->AddValue((Double_t)x,weight); | |
74 | fSz->AddValue((Double_t)z,weight); | |
75 | ifirst = 0; | |
76 | if(hit->StatusExiting()|| // leaving volume | |
77 | hit->StatusDisappeared()|| // interacted/decayed... | |
78 | hit->StatusStop() // dropped below E cuts. | |
79 | ){ // exiting track, write out RecPoint. | |
80 | // if(fSz->GetRMS()>1.E-1) { | |
81 | // TParticle *part = hit->GetParticle(); | |
82 | // printf("idpart %d energy %f \n",part->GetPdgCode(),part->Energy()); | |
83 | // printf("diffx=%e diffy=%e diffz=%e\n",x-x1,y-y1,z-z1); | |
84 | // } | |
85 | switch (mod->GetLayer()){ | |
86 | case 1: case 2: // SPDs | |
87 | AddSPD(e,mod,trk); | |
88 | break; | |
89 | case 3: case 4: // SDDs | |
90 | AddSDD(e,mod,trk); | |
91 | break; | |
92 | case 5: case 6: // SSDs | |
93 | AddSSD(e,mod,trk); | |
94 | break; | |
95 | } // end switch | |
96 | fSx->Reset(); | |
97 | fSz->Reset(); | |
98 | e = 0.; | |
99 | ifirst = 1; | |
100 | continue; | |
101 | }// end if | |
102 | } // end for h | |
103 | } | |
104 | //_______________________________________________________________________ | |
105 | void AliITSsimulationFastPointsV0::AddSPD(Float_t &e, | |
106 | AliITSmodule *mod,Int_t trackNumber){ | |
107 | const Float_t kmicronTocm = 1.0e-4; | |
108 | // const Float_t kdEdXtoQ = ; | |
109 | const Float_t kRMSx = 12.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
110 | const Float_t kRMSz = 70.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
111 | Float_t a1,a2; // general float. | |
112 | AliITSRecPoint rpSPD; | |
113 | ||
114 | rpSPD.fTracks[0]=trackNumber; | |
517784f0 | 115 | rpSPD.fTracks[1]=-3; |
116 | rpSPD.fTracks[2]=-3; | |
e8189707 | 117 | rpSPD.SetX(fSx->GetMean()); |
118 | rpSPD.SetZ(fSz->GetMean()); | |
ac74f489 | 119 | rpSPD.SetdEdX(e); |
e8189707 | 120 | rpSPD.SetQ(1.0); |
121 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
122 | // if(a1>1.E5) printf("addSPD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
123 | // mod->GetLayer(),trackNumber,e,a1); | |
124 | rpSPD.SetSigmaX2(a1); | |
125 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
126 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
127 | rpSPD.SetSigmaZ2(a2); | |
e8189707 | 128 | |
129 | (mod->GetITS())->AddRecPoint(rpSPD); | |
130 | } | |
131 | //_______________________________________________________________________ | |
132 | void AliITSsimulationFastPointsV0::AddSDD(Float_t &e, | |
133 | AliITSmodule *mod,Int_t trackNumber){ | |
134 | ||
135 | const Float_t kmicronTocm = 1.0e-4; | |
136 | const Float_t kdEdXtoQ = 2.778e+8; | |
137 | const Float_t kRMSx = 38.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
138 | const Float_t kRMSz = 28.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
139 | Float_t a1,a2; // general float. | |
140 | AliITSRecPoint rpSDD; | |
141 | ||
142 | rpSDD.fTracks[0]=trackNumber; | |
517784f0 | 143 | rpSDD.fTracks[1]=-3; |
144 | rpSDD.fTracks[2]=-3; | |
e8189707 | 145 | rpSDD.SetX(fSx->GetMean()); |
146 | rpSDD.SetZ(fSz->GetMean()); | |
147 | rpSDD.SetdEdX(e); | |
148 | rpSDD.SetQ(kdEdXtoQ*e); | |
149 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
150 | // if(a1>1.E5) printf("addSDD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
151 | // mod->GetLayer(),trackNumber,e,a1); | |
152 | rpSDD.SetSigmaX2(a1); | |
153 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
154 | // if(a1>1.E5) printf(" sigmaZ2= %e\n",a2); | |
155 | rpSDD.SetSigmaZ2(a2); | |
e8189707 | 156 | |
157 | (mod->GetITS())->AddRecPoint(rpSDD); | |
158 | } | |
159 | //_______________________________________________________________________ | |
160 | void AliITSsimulationFastPointsV0::AddSSD(Float_t &e, | |
161 | AliITSmodule *mod,Int_t trackNumber){ | |
162 | ||
163 | const Float_t kmicronTocm = 1.0e-4; | |
164 | const Float_t kdEdXtoQ = 2.778e+8; | |
165 | const Float_t kRMSx = 20.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
166 | const Float_t kRMSz = 830.0*kmicronTocm; // microns->cm ITS TDR Table 1.3 | |
167 | Float_t a1,a2; // general float. | |
168 | AliITSRecPoint rpSSD; | |
169 | ||
170 | rpSSD.fTracks[0]=trackNumber; | |
517784f0 | 171 | rpSSD.fTracks[1]=-3; |
172 | rpSSD.fTracks[2]=-3; | |
e8189707 | 173 | rpSSD.SetX(fSx->GetMean()); |
174 | rpSSD.SetZ(fSz->GetMean()); | |
175 | rpSSD.SetdEdX(e); | |
176 | rpSSD.SetQ(kdEdXtoQ*e); | |
177 | a1 = fSx->GetRMS(); a1 *= a1; a1 += kRMSx*kRMSx; | |
178 | // if(a1>1.E5) printf("addSSD: layer=%d track #%d dedx=%e sigmaX2= %e ", | |
179 | // mod->GetLayer(),trackNumber,e,a1); | |
180 | rpSSD.SetSigmaX2(a1); | |
181 | a2 = fSz->GetRMS(); a2 *= a2; a2 += kRMSz*kRMSz; | |
182 | // if(a1>1.E5) printf(" sigmaZ2= %e RMSx=%e RMSz=%e\n",a2,fSx->GetRMS(),fSz->GetRMS()); | |
183 | rpSSD.SetSigmaZ2(a2); | |
e8189707 | 184 | |
185 | (mod->GetITS())->AddRecPoint(rpSSD); | |
186 | } | |
187 | //_______________________________________________________________________ | |
188 |