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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 | ||
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> |
e939a978 | 26 | #include <TRandom.h> |
9e04c3b6 | 27 | |
28 | // --- AliRoot header files --- | |
29 | #include "AliVZEROConst.h" | |
30 | #include "AliRun.h" | |
31 | #include "AliVZERO.h" | |
32 | #include "AliVZEROhit.h" | |
9e04c3b6 | 33 | #include "AliRunLoader.h" |
34 | #include "AliLoader.h" | |
9e04c3b6 | 35 | #include "AliRunDigitizer.h" |
ce7090f5 | 36 | #include "AliCDBManager.h" |
37 | #include "AliCDBStorage.h" | |
38 | #include "AliCDBEntry.h" | |
39 | #include "AliVZEROCalibData.h" | |
40 | ||
9e04c3b6 | 41 | #include "AliVZEROdigit.h" |
b0d2c2d3 | 42 | #include "AliVZERODigitizer.h" |
9e04c3b6 | 43 | |
44 | ClassImp(AliVZERODigitizer) | |
45 | ||
46 | AliVZERODigitizer::AliVZERODigitizer() | |
0b2bea8b | 47 | :AliDigitizer(), |
48 | fCalibData(GetCalibData()), | |
49 | fPhotoCathodeEfficiency(0.18), | |
50 | fPMVoltage(768.0), | |
51 | fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)), | |
52 | fNdigits(0), | |
53 | fDigits(0) | |
54 | ||
9e04c3b6 | 55 | { |
b0d2c2d3 | 56 | // default constructor |
57 | ||
0b2bea8b | 58 | // fNdigits = 0; |
59 | // fDigits = 0; | |
60 | // | |
61 | // fPhotoCathodeEfficiency = 0.18; | |
62 | // fPMVoltage = 768.0; | |
63 | // fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277); | |
ce7090f5 | 64 | |
0b2bea8b | 65 | // fCalibData = GetCalibData(); |
9e04c3b6 | 66 | } |
67 | ||
68 | //____________________________________________________________________________ | |
69 | AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager) | |
0b2bea8b | 70 | :AliDigitizer(manager), |
71 | fCalibData(GetCalibData()), | |
72 | fPhotoCathodeEfficiency(0.18), | |
73 | fPMVoltage(768.0), | |
74 | fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)), | |
75 | fNdigits(0), | |
76 | fDigits(0) | |
77 | ||
9e04c3b6 | 78 | { |
79 | // constructor | |
80 | ||
0b2bea8b | 81 | // fNdigits = 0; |
82 | // fDigits = 0; | |
83 | // | |
84 | // fPhotoCathodeEfficiency = 0.18; | |
85 | // fPMVoltage = 768.0; | |
86 | // fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 ); | |
ce7090f5 | 87 | |
0b2bea8b | 88 | // fCalibData = GetCalibData(); |
ce7090f5 | 89 | |
9e04c3b6 | 90 | } |
91 | ||
92 | //____________________________________________________________________________ | |
93 | AliVZERODigitizer::~AliVZERODigitizer() | |
94 | { | |
95 | // destructor | |
96 | ||
97 | if (fDigits) { | |
98 | fDigits->Delete(); | |
99 | delete fDigits; | |
b0d2c2d3 | 100 | fDigits=0; |
101 | } | |
9e04c3b6 | 102 | } |
103 | ||
b0d2c2d3 | 104 | //_____________________________________________________________________________ |
105 | Bool_t AliVZERODigitizer::Init() | |
9e04c3b6 | 106 | { |
b0d2c2d3 | 107 | // Initialises the digitizer |
9e04c3b6 | 108 | |
b0d2c2d3 | 109 | // Initialises the Digit array |
9e04c3b6 | 110 | fDigits = new TClonesArray ("AliVZEROdigit", 1000); |
111 | ||
b0d2c2d3 | 112 | return kTRUE; |
9e04c3b6 | 113 | } |
114 | ||
115 | //____________________________________________________________________________ | |
b0d2c2d3 | 116 | void AliVZERODigitizer::Exec(Option_t* /*option*/) |
ce7090f5 | 117 | { |
b0d2c2d3 | 118 | // Creates digits from hits |
ce7090f5 | 119 | |
20277079 | 120 | Int_t map[80]; // 48 values on V0C + 32 on V0A |
121 | Int_t adc[64]; // 32 PMs on V0C + 32 PMs on V0A | |
122 | Float_t time[80], time2[64], adc_gain[80]; | |
ce7090f5 | 123 | fNdigits = 0; |
124 | Float_t cPM = fPhotoCathodeEfficiency * fPMGain; | |
125 | ||
126 | // Retrieval of ADC gain values from local CDB | |
127 | // I use only the first 64th values of the calibration array in CDB | |
128 | // as I have no beam burst structure - odd or even beam burst number | |
b0d2c2d3 | 129 | |
ce7090f5 | 130 | // Reminder : We have 16 scintillating cells mounted on 8 PMs |
20277079 | 131 | // on Ring 3 and Ring 4 in V0C - added to produce ADC outputs |
132 | // on these rings... | |
ce7090f5 | 133 | |
134 | for(Int_t i=0; i<16; i++) { adc_gain[i] = fCalibData->GetGain(i) ; }; | |
135 | ||
136 | for(Int_t j=16; j<48; j=j+2) { | |
137 | Int_t i=(j+17)/2; | |
138 | adc_gain[j] = fCalibData->GetGain(i) ; | |
139 | adc_gain[j+1] = fCalibData->GetGain(i) ; } | |
140 | for(Int_t i=48; i<80; i++) { adc_gain[i] = fCalibData->GetGain(i-16) ; } | |
141 | ||
142 | // for(Int_t i=0; i<80; i++) { printf(" i = %d gain = %f\n\n", i, adc_gain[i] );} | |
143 | ||
b0d2c2d3 | 144 | AliRunLoader* outRunLoader = |
145 | AliRunLoader::GetRunLoader(fManager->GetOutputFolderName()); | |
146 | if (!outRunLoader) { | |
147 | Error("Exec", "Can not get output Run Loader"); | |
ce7090f5 | 148 | return;} |
149 | ||
b0d2c2d3 | 150 | AliLoader* outLoader = outRunLoader->GetLoader("VZEROLoader"); |
151 | if (!outLoader) { | |
152 | Error("Exec", "Can not get output VZERO Loader"); | |
ce7090f5 | 153 | return;} |
b0d2c2d3 | 154 | |
155 | outLoader->LoadDigits("update"); | |
156 | if (!outLoader->TreeD()) outLoader->MakeTree("D"); | |
157 | outLoader->MakeDigitsContainer(); | |
ce7090f5 | 158 | TTree* treeD = outLoader->TreeD(); |
b0d2c2d3 | 159 | Int_t bufsize = 16000; |
160 | treeD->Branch("VZERODigit", &fDigits, bufsize); | |
161 | ||
162 | for (Int_t iInput = 0; iInput < fManager->GetNinputs(); iInput++) { | |
163 | AliRunLoader* runLoader = | |
164 | AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput)); | |
165 | AliLoader* loader = runLoader->GetLoader("VZEROLoader"); | |
166 | if (!loader) { | |
167 | Error("Exec", "Can not get VZERO Loader for input %d", iInput); | |
ce7090f5 | 168 | continue;} |
169 | ||
b0d2c2d3 | 170 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); |
171 | ||
172 | AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO"); | |
173 | if (!vzero) { | |
174 | Error("Exec", "No VZERO detector for input %d", iInput); | |
ce7090f5 | 175 | continue;} |
9e04c3b6 | 176 | |
b0d2c2d3 | 177 | loader->LoadHits(); |
178 | TTree* treeH = loader->TreeH(); | |
179 | if (!treeH) { | |
180 | Error("Exec", "Cannot get TreeH for input %d", iInput); | |
ce7090f5 | 181 | continue; } |
841137ce | 182 | |
183 | Float_t timeV0 = 1e12; | |
20277079 | 184 | for(Int_t i=0; i<80; i++) { map[i] = 0; time[i] = 0.0; } |
841137ce | 185 | |
b0d2c2d3 | 186 | TClonesArray* hits = vzero->Hits(); |
9e04c3b6 | 187 | |
b0d2c2d3 | 188 | // Now makes Digits from hits |
9e04c3b6 | 189 | |
b0d2c2d3 | 190 | Int_t nTracks = (Int_t) treeH->GetEntries(); |
191 | for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) { | |
192 | vzero->ResetHits(); | |
193 | treeH->GetEvent(iTrack); | |
194 | Int_t nHits = hits->GetEntriesFast(); | |
195 | for (Int_t iHit = 0; iHit < nHits; iHit++) { | |
196 | AliVZEROhit* hit = (AliVZEROhit *)hits->UncheckedAt(iHit); | |
197 | Int_t nPhot = hit->Nphot(); | |
198 | Int_t cell = hit->Cell(); | |
20277079 | 199 | map[cell] += nPhot; |
200 | Float_t dt_scintillator = gRandom->Gaus(0,0.7); | |
841137ce | 201 | time[cell] = dt_scintillator + 1e9*hit->Tof(); |
202 | if(time[cell] < timeV0) timeV0 = time[cell]; | |
b0d2c2d3 | 203 | } // hit loop |
204 | } // track loop | |
205 | ||
206 | loader->UnloadHits(); | |
207 | ||
208 | } // input loop | |
20277079 | 209 | |
210 | // Now builds the scintillator cell response (80 cells i.e. 80 responses) | |
841137ce | 211 | |
20277079 | 212 | for (Int_t i=0; i<80; i++) { |
213 | Float_t q1 = Float_t ( map[i] )* cPM * kQe; | |
214 | Float_t noise = gRandom->Gaus(10.5,3.22); | |
215 | Float_t pmResponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau)) | |
216 | + noise*1e-3; | |
217 | map[i] = Int_t( pmResponse * adc_gain[i]); | |
218 | } | |
219 | ||
220 | ||
221 | // Now transforms 80 cell responses into 64 photomultiplier responses | |
222 | ||
223 | for (Int_t j=0; j<32; j++){ | |
224 | adc[j] = map [j]; | |
225 | time2[j]= time[j];} | |
226 | ||
227 | for (Int_t j=48; j<80; j++){ | |
228 | adc[j-16] = map [j]; | |
229 | time2[j-16]= time[j];} | |
230 | ||
231 | for (Int_t j=0; j<16; j++){ | |
232 | adc[16+j] = map [16 + 2*j]+ map [16 + 2*j + 1]; | |
233 | time2[16+j] = TMath::Min(time [16 + 2*j], time [16 + 2*j + 1]);} | |
234 | ||
235 | // Now add digits to the digit Tree | |
236 | ||
237 | for (Int_t i=0; i<64; i++) { | |
238 | if(adc[i] > 0) { | |
239 | // printf(" Event, cell, adc, tof = %d %d %d %f\n", | |
240 | // outRunLoader->GetEventNumber(),i, map[i], time[i]*100.0); | |
5c1828c2 | 241 | // multiply by 10 to have 100 ps per channel : |
20277079 | 242 | AddDigit(i, adc[i], Int_t(time2[i]*10.0) ); |
243 | } | |
244 | } | |
b0d2c2d3 | 245 | |
20277079 | 246 | |
b0d2c2d3 | 247 | treeD->Fill(); |
248 | outLoader->WriteDigits("OVERWRITE"); | |
249 | outLoader->UnloadDigits(); | |
250 | ResetDigit(); | |
9e04c3b6 | 251 | } |
252 | ||
253 | //____________________________________________________________________________ | |
20277079 | 254 | void AliVZERODigitizer::AddDigit(Int_t PMnumber, Int_t adc, Int_t time) |
9e04c3b6 | 255 | { |
256 | ||
257 | // Adds Digit | |
258 | ||
259 | TClonesArray &ldigits = *fDigits; | |
20277079 | 260 | new(ldigits[fNdigits++]) AliVZEROdigit(PMnumber,adc,time); |
9e04c3b6 | 261 | } |
262 | //____________________________________________________________________________ | |
263 | void AliVZERODigitizer::ResetDigit() | |
264 | { | |
b0d2c2d3 | 265 | // |
9e04c3b6 | 266 | // Clears Digits |
b0d2c2d3 | 267 | // |
9e04c3b6 | 268 | fNdigits = 0; |
b0d2c2d3 | 269 | if (fDigits) fDigits->Delete(); |
9e04c3b6 | 270 | } |
ce7090f5 | 271 | |
272 | //____________________________________________________________________________ | |
273 | AliVZEROCalibData* AliVZERODigitizer::GetCalibData() const | |
274 | ||
275 | { | |
c0b82b5a | 276 | AliCDBManager *man = AliCDBManager::Instance(); |
ce7090f5 | 277 | |
c0b82b5a | 278 | AliCDBEntry *entry=0; |
ce7090f5 | 279 | |
c0b82b5a | 280 | entry = man->Get("VZERO/Calib/Data"); |
281 | ||
282 | if(!entry){ | |
283 | AliWarning("Load of calibration data from default storage failed!"); | |
284 | AliWarning("Calibration data will be loaded from local storage ($ALICE_ROOT)"); | |
285 | Int_t runNumber = man->GetRun(); | |
286 | entry = man->GetStorage("local://$ALICE_ROOT") | |
287 | ->Get("VZERO/Calib/Data",runNumber); | |
288 | ||
289 | } | |
290 | ||
291 | // Retrieval of data in directory VZERO/Calib/Data: | |
ce7090f5 | 292 | |
ce7090f5 | 293 | |
c0b82b5a | 294 | AliVZEROCalibData *calibdata = 0; |
ce7090f5 | 295 | |
c0b82b5a | 296 | if (entry) calibdata = (AliVZEROCalibData*) entry->GetObject(); |
297 | if (!calibdata) AliError("No calibration data from calibration database !"); | |
ce7090f5 | 298 | |
c0b82b5a | 299 | return calibdata; |
ce7090f5 | 300 | |
301 | } | |
302 |