]>
Commit | Line | Data |
---|---|---|
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 | ||
b0d2c2d3 | 16 | ///_________________________________________________________________________ |
17 | /// | |
18 | /// This class constructs Digits out of Hits | |
19 | /// | |
20 | /// | |
9e04c3b6 | 21 | |
22 | // --- Standard library --- | |
9e04c3b6 | 23 | |
24 | // --- ROOT system --- | |
9e04c3b6 | 25 | #include <TTree.h> |
9e04c3b6 | 26 | |
27 | // --- AliRoot header files --- | |
28 | #include "AliVZEROConst.h" | |
29 | #include "AliRun.h" | |
30 | #include "AliVZERO.h" | |
31 | #include "AliVZEROhit.h" | |
9e04c3b6 | 32 | #include "AliRunLoader.h" |
33 | #include "AliLoader.h" | |
9e04c3b6 | 34 | #include "AliRunDigitizer.h" |
9e04c3b6 | 35 | #include "AliVZEROdigit.h" |
b0d2c2d3 | 36 | #include "AliVZERODigitizer.h" |
9e04c3b6 | 37 | |
38 | ClassImp(AliVZERODigitizer) | |
39 | ||
40 | AliVZERODigitizer::AliVZERODigitizer() | |
41 | { | |
b0d2c2d3 | 42 | // default constructor |
43 | ||
9e04c3b6 | 44 | fNdigits = 0; |
b0d2c2d3 | 45 | fDigits = 0 ; |
9e04c3b6 | 46 | |
47 | fPhotoCathodeEfficiency = 0.18; | |
48 | fPMVoltage = 768.0; | |
49 | fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277); | |
50 | } | |
51 | ||
52 | //____________________________________________________________________________ | |
53 | AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager) | |
54 | :AliDigitizer(manager) | |
55 | ||
56 | { | |
57 | // constructor | |
58 | ||
9e04c3b6 | 59 | fNdigits = 0; |
b0d2c2d3 | 60 | fDigits = 0 ; |
9e04c3b6 | 61 | |
62 | fPhotoCathodeEfficiency = 0.18; | |
63 | fPMVoltage = 768.0; | |
64 | fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 ); | |
65 | } | |
66 | ||
67 | //____________________________________________________________________________ | |
68 | AliVZERODigitizer::~AliVZERODigitizer() | |
69 | { | |
70 | // destructor | |
71 | ||
72 | if (fDigits) { | |
73 | fDigits->Delete(); | |
74 | delete fDigits; | |
b0d2c2d3 | 75 | fDigits=0; |
76 | } | |
9e04c3b6 | 77 | } |
78 | ||
b0d2c2d3 | 79 | //_____________________________________________________________________________ |
80 | Bool_t AliVZERODigitizer::Init() | |
9e04c3b6 | 81 | { |
b0d2c2d3 | 82 | // Initialises the digitizer |
9e04c3b6 | 83 | |
b0d2c2d3 | 84 | // Initialises the Digit array |
9e04c3b6 | 85 | fDigits = new TClonesArray ("AliVZEROdigit", 1000); |
86 | ||
b0d2c2d3 | 87 | return kTRUE; |
9e04c3b6 | 88 | } |
89 | ||
90 | //____________________________________________________________________________ | |
b0d2c2d3 | 91 | void AliVZERODigitizer::Exec(Option_t* /*option*/) |
92 | { | |
93 | // | |
94 | // Creates digits from hits | |
95 | // | |
96 | ||
9e04c3b6 | 97 | fNdigits = 0; |
9e04c3b6 | 98 | Int_t map[96]; |
9e04c3b6 | 99 | Float_t cPM = fPhotoCathodeEfficiency * fPMGain; |
2d7933c7 | 100 | |
9e04c3b6 | 101 | for(Int_t i=0; i<96; i++) map[i] = 0; |
102 | ||
b0d2c2d3 | 103 | AliRunLoader* outRunLoader = |
104 | AliRunLoader::GetRunLoader(fManager->GetOutputFolderName()); | |
105 | if (!outRunLoader) { | |
106 | Error("Exec", "Can not get output Run Loader"); | |
107 | return; | |
108 | } | |
109 | AliLoader* outLoader = outRunLoader->GetLoader("VZEROLoader"); | |
110 | if (!outLoader) { | |
111 | Error("Exec", "Can not get output VZERO Loader"); | |
112 | return; | |
113 | } | |
114 | ||
115 | outLoader->LoadDigits("update"); | |
116 | if (!outLoader->TreeD()) outLoader->MakeTree("D"); | |
117 | outLoader->MakeDigitsContainer(); | |
118 | TTree* treeD = outLoader->TreeD(); | |
119 | Int_t bufsize = 16000; | |
120 | treeD->Branch("VZERODigit", &fDigits, bufsize); | |
121 | ||
122 | for (Int_t iInput = 0; iInput < fManager->GetNinputs(); iInput++) { | |
123 | AliRunLoader* runLoader = | |
124 | AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput)); | |
125 | AliLoader* loader = runLoader->GetLoader("VZEROLoader"); | |
126 | if (!loader) { | |
127 | Error("Exec", "Can not get VZERO Loader for input %d", iInput); | |
128 | continue; | |
129 | } | |
130 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); | |
131 | ||
132 | AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO"); | |
133 | if (!vzero) { | |
134 | Error("Exec", "No VZERO detector for input %d", iInput); | |
135 | continue; | |
136 | } | |
9e04c3b6 | 137 | |
b0d2c2d3 | 138 | loader->LoadHits(); |
139 | TTree* treeH = loader->TreeH(); | |
140 | if (!treeH) { | |
141 | Error("Exec", "Cannot get TreeH for input %d", iInput); | |
142 | continue; | |
143 | } | |
144 | TClonesArray* hits = vzero->Hits(); | |
9e04c3b6 | 145 | |
b0d2c2d3 | 146 | // Now makes Digits from hits |
9e04c3b6 | 147 | |
b0d2c2d3 | 148 | Int_t nTracks = (Int_t) treeH->GetEntries(); |
149 | for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) { | |
150 | vzero->ResetHits(); | |
151 | treeH->GetEvent(iTrack); | |
152 | Int_t nHits = hits->GetEntriesFast(); | |
153 | for (Int_t iHit = 0; iHit < nHits; iHit++) { | |
154 | AliVZEROhit* hit = (AliVZEROhit *)hits->UncheckedAt(iHit); | |
155 | Int_t nPhot = hit->Nphot(); | |
156 | Int_t cell = hit->Cell(); | |
157 | map[cell] += nPhot; | |
158 | } // hit loop | |
159 | } // track loop | |
160 | ||
161 | loader->UnloadHits(); | |
162 | ||
163 | } // input loop | |
9e04c3b6 | 164 | |
b0d2c2d3 | 165 | for (Int_t i=0; i<96; i++) { |
166 | Float_t q1 = Float_t ( map[i] )* cPM * kQe; | |
167 | Float_t noise = gRandom->Gaus(10.5,3.22); | |
168 | Float_t pmResponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau)) | |
169 | + noise*1e-3; | |
170 | map[i] = Int_t( pmResponse * 200.0); | |
171 | if(map[i] > 3) { | |
172 | // printf(" Event, cell, adc = %d %d %d\n", outRunLoader->GetEventNumber(),i, map[i]); | |
173 | AddDigit(i, map[i]); | |
174 | } | |
175 | } | |
176 | ||
177 | treeD->Fill(); | |
178 | outLoader->WriteDigits("OVERWRITE"); | |
179 | outLoader->UnloadDigits(); | |
180 | ResetDigit(); | |
9e04c3b6 | 181 | } |
182 | ||
183 | //____________________________________________________________________________ | |
b0d2c2d3 | 184 | void AliVZERODigitizer::AddDigit(Int_t cellnumber, Int_t adc) |
9e04c3b6 | 185 | { |
186 | ||
187 | // Adds Digit | |
188 | ||
189 | TClonesArray &ldigits = *fDigits; | |
b0d2c2d3 | 190 | new(ldigits[fNdigits++]) AliVZEROdigit(cellnumber,adc); |
9e04c3b6 | 191 | } |
192 | //____________________________________________________________________________ | |
193 | void AliVZERODigitizer::ResetDigit() | |
194 | { | |
b0d2c2d3 | 195 | // |
9e04c3b6 | 196 | // Clears Digits |
b0d2c2d3 | 197 | // |
9e04c3b6 | 198 | fNdigits = 0; |
b0d2c2d3 | 199 | if (fDigits) fDigits->Delete(); |
9e04c3b6 | 200 | } |