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9e04c3b6 | 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 | // | |
18 | // This constructs Digits out of Hits | |
19 | // | |
20 | ||
21 | // --- Standard library --- | |
22 | #include <Riostream.h> | |
23 | #include <stdlib.h> | |
24 | ||
25 | // --- ROOT system --- | |
26 | #include <TFile.h> | |
27 | #include <TFolder.h> | |
28 | #include <TROOT.h> | |
29 | #include <TSystem.h> | |
30 | #include <TTree.h> | |
31 | #include <TVirtualMC.h> | |
32 | ||
33 | // --- AliRoot header files --- | |
34 | #include "AliVZEROConst.h" | |
35 | #include "AliRun.h" | |
36 | #include "AliVZERO.h" | |
37 | #include "AliVZEROhit.h" | |
38 | #include "AliHit.h" | |
39 | #include "AliDetector.h" | |
40 | #include "AliRunLoader.h" | |
41 | #include "AliLoader.h" | |
42 | #include "AliConfig.h" | |
43 | #include "AliRunDigitizer.h" | |
44 | #include "AliDigitizer.h" | |
45 | #include "AliHeader.h" | |
46 | #include "AliStack.h" | |
47 | #include "AliVZERODigitizer.h" | |
48 | #include "AliVZEROdigit.h" | |
49 | #include "AliMC.h" | |
50 | ||
51 | ClassImp(AliVZERODigitizer) | |
52 | ||
53 | AliVZERODigitizer::AliVZERODigitizer() | |
54 | { | |
55 | if (!fDigits) fDigits = new TClonesArray("AliVZEROdigit", 1000); | |
56 | ||
57 | fNevents = 0 ; | |
58 | fDigits = 0 ; | |
59 | fNdigits = 0; | |
60 | fHits = 0 ; | |
61 | fRunLoader = 0; | |
62 | ||
63 | fPhotoCathodeEfficiency = 0.18; | |
64 | fPMVoltage = 768.0; | |
65 | fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277); | |
66 | } | |
67 | ||
68 | //____________________________________________________________________________ | |
69 | AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager) | |
70 | :AliDigitizer(manager) | |
71 | ||
72 | { | |
73 | // constructor | |
74 | ||
75 | fNevents = 0; | |
76 | fDigits = 0; | |
77 | fNdigits = 0; | |
78 | fHits = 0; | |
79 | fRunLoader = 0; | |
80 | ||
81 | fPhotoCathodeEfficiency = 0.18; | |
82 | fPMVoltage = 768.0; | |
83 | fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 ); | |
84 | } | |
85 | ||
86 | //____________________________________________________________________________ | |
87 | AliVZERODigitizer::~AliVZERODigitizer() | |
88 | { | |
89 | // destructor | |
90 | ||
91 | if (fDigits) { | |
92 | fDigits->Delete(); | |
93 | delete fDigits; | |
94 | fDigits=0; } | |
95 | } | |
96 | ||
97 | //____________________________________________________________________________ | |
98 | void AliVZERODigitizer::OpengAliceFile(const char *file) | |
99 | { | |
100 | // Loads galice.root file and corresponding header, kinematics | |
101 | // hits and digits | |
102 | ||
e191bb57 | 103 | fRunLoader = AliRunLoader::Open(file,AliConfig::GetDefaultEventFolderName(), |
9e04c3b6 | 104 | "UPDATE"); |
105 | ||
106 | if (!fRunLoader) | |
107 | { | |
108 | Error("Open","Can not open session for file %s.",file); | |
109 | } | |
110 | ||
111 | fRunLoader->LoadgAlice(); | |
112 | fRunLoader->LoadHeader(); | |
113 | fRunLoader->LoadKinematics(); | |
114 | ||
115 | gAlice = fRunLoader->GetAliRun(); | |
116 | ||
117 | if (gAlice) | |
118 | { printf("<AliVZEROdigitizer::Open> "); | |
119 | printf("AliRun object found on file.\n");} | |
120 | else | |
121 | { printf("<AliVZEROdigitizer::Open> "); | |
122 | printf("Could not find AliRun object.\n");} | |
123 | ||
124 | // Initialise Hit and Digit arrays | |
125 | fHits = new TClonesArray ("AliVZEROhit", 1000); | |
126 | fDigits = new TClonesArray ("AliVZEROdigit", 1000); | |
127 | ||
128 | fVZERO = (AliVZERO*) gAlice->GetDetector("VZERO"); | |
129 | fVZEROLoader = fRunLoader->GetLoader("VZEROLoader"); | |
130 | ||
131 | if (fVZEROLoader == 0x0){ | |
132 | cerr<<"Hits2Digits : Can not find VZERO or VZEROLoader\n";} | |
133 | ||
134 | Int_t retval = fVZEROLoader->LoadHits("read"); | |
135 | if (retval){ | |
136 | Error("Open","Error occured while loading hits... Exiting."); | |
137 | return;} | |
138 | ||
139 | fVZEROLoader->LoadDigits("recreate"); | |
140 | } | |
141 | ||
142 | //____________________________________________________________________________ | |
143 | void AliVZERODigitizer::Exec() | |
144 | { | |
145 | ||
9e04c3b6 | 146 | fNdigits = 0; |
147 | Int_t N; | |
148 | Int_t map[96]; | |
149 | Int_t cell = 0; | |
150 | Float_t cPM = fPhotoCathodeEfficiency * fPMGain; | |
2d7933c7 | 151 | |
9e04c3b6 | 152 | for(Int_t i=0; i<96; i++) map[i] = 0; |
153 | ||
154 | fNevents = (Int_t) fRunLoader->TreeE()->GetEntries (); | |
155 | printf(" Number of events in file = %d \n", fNevents); | |
156 | ||
157 | for (Int_t ievent = 0; ievent < fNevents; ievent++){ | |
158 | ||
159 | for(Int_t i=0; i<96; i++) map[i] = 0; | |
160 | ||
161 | fRunLoader->GetEvent(ievent); | |
162 | ||
163 | fTreeH = fVZEROLoader->TreeH(); | |
164 | if (fTreeH == 0x0) | |
165 | { Error("Exec","Cannot get TreeH"); | |
166 | return; } | |
167 | ||
168 | fTreeD = fVZEROLoader->TreeD(); | |
169 | if (fTreeD == 0x0) | |
170 | { fVZEROLoader->MakeTree("D"); | |
171 | fVZEROLoader->MakeDigitsContainer(); | |
172 | fTreeD = fVZEROLoader->TreeD(); } | |
2d7933c7 | 173 | |
9e04c3b6 | 174 | Int_t bufsize = 16000; |
175 | fTreeD->Branch("VZERODigit", &fDigits, bufsize); | |
176 | ||
177 | // Now make Digits from hits | |
178 | ||
179 | if (fVZERO) | |
180 | { | |
181 | fHits = fVZERO->Hits(); | |
182 | ||
183 | Int_t ntracks = (Int_t) fTreeH->GetEntries (); | |
2d7933c7 | 184 | // printf(" Number of Tracks in the TreeH = %d \n", ntracks); |
9e04c3b6 | 185 | for (Int_t track = 0; track < ntracks; track++) |
186 | { | |
187 | gAlice->ResetHits (); | |
2d7933c7 | 188 | fTreeH->GetEvent(track); |
9e04c3b6 | 189 | fParticle = fRunLoader->Stack()->Particle(track); |
190 | Int_t nhits = fHits->GetEntriesFast(); | |
191 | for (Int_t hit = 0; hit < nhits; hit++) | |
192 | { | |
193 | fVZEROHit = (AliVZEROhit *)fHits->UncheckedAt(hit); | |
2d7933c7 | 194 | N = fVZEROHit->Nphot(); |
195 | cell = fVZEROHit->Cell(); | |
196 | map[cell] = map[cell] + N; | |
9e04c3b6 | 197 | } // hit loop |
198 | } // track loop | |
199 | ||
200 | Int_t icount = 0; | |
2d7933c7 | 201 | |
9e04c3b6 | 202 | for(Int_t i=0; i<96; i++) { |
2d7933c7 | 203 | Float_t q1 = Float_t ( map[i] )* cPM * kQe; |
204 | Float_t noise = gRandom->Gaus(10.5,3.22); | |
9e04c3b6 | 205 | Float_t PMresponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau)) |
2d7933c7 | 206 | + noise*1e-3; |
207 | map[i] = Int_t( PMresponse * 200.0); | |
208 | if(map[i] > 3) { | |
209 | icount++; | |
210 | // printf(" Event, cell, adc = %d %d %d\n", ievent, i, map[i]); | |
211 | AddDigit(ievent, i, map[i]);} | |
9e04c3b6 | 212 | } |
213 | ||
214 | fTreeD->Reset(); | |
215 | fTreeD->Fill(); | |
2d7933c7 | 216 | ResetDigit(); |
9e04c3b6 | 217 | fVZEROLoader->WriteDigits("OVERWRITE"); |
2d7933c7 | 218 | fVZEROLoader->UnloadDigits(); |
9e04c3b6 | 219 | } // VZERO loop |
220 | } //event loop | |
221 | } | |
222 | ||
223 | //____________________________________________________________________________ | |
224 | void AliVZERODigitizer::AddDigit(Int_t eventnumber, Int_t cellnumber, Int_t adc) | |
225 | { | |
226 | ||
227 | // Adds Digit | |
228 | ||
229 | TClonesArray &ldigits = *fDigits; | |
230 | new(ldigits[fNdigits++]) AliVZEROdigit(eventnumber,cellnumber,adc); | |
231 | } | |
232 | //____________________________________________________________________________ | |
233 | void AliVZERODigitizer::ResetDigit() | |
234 | { | |
235 | // Clears Digits | |
236 | fNdigits = 0; | |
237 | if (fDigits) fDigits->Clear(); | |
238 | } |