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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 | ||
090026bf | 16 | /* $Id$ */ |
17 | ||
b0d2c2d3 | 18 | ///_________________________________________________________________________ |
19 | /// | |
20 | /// This class constructs Digits out of Hits | |
21 | /// | |
22 | /// | |
9e04c3b6 | 23 | |
24 | // --- Standard library --- | |
9e04c3b6 | 25 | |
26 | // --- ROOT system --- | |
090026bf | 27 | #include <TMath.h> |
9e04c3b6 | 28 | #include <TTree.h> |
e939a978 | 29 | #include <TRandom.h> |
9e04c3b6 | 30 | |
31 | // --- AliRoot header files --- | |
32 | #include "AliVZEROConst.h" | |
33 | #include "AliRun.h" | |
34 | #include "AliVZERO.h" | |
35 | #include "AliVZEROhit.h" | |
9e04c3b6 | 36 | #include "AliRunLoader.h" |
37 | #include "AliLoader.h" | |
9e04c3b6 | 38 | #include "AliRunDigitizer.h" |
ce7090f5 | 39 | #include "AliCDBManager.h" |
40 | #include "AliCDBStorage.h" | |
41 | #include "AliCDBEntry.h" | |
42 | #include "AliVZEROCalibData.h" | |
43 | ||
9e04c3b6 | 44 | #include "AliVZEROdigit.h" |
b0d2c2d3 | 45 | #include "AliVZERODigitizer.h" |
9e04c3b6 | 46 | |
47 | ClassImp(AliVZERODigitizer) | |
48 | ||
49 | AliVZERODigitizer::AliVZERODigitizer() | |
0b2bea8b | 50 | :AliDigitizer(), |
51 | fCalibData(GetCalibData()), | |
52 | fPhotoCathodeEfficiency(0.18), | |
53 | fPMVoltage(768.0), | |
54 | fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)), | |
55 | fNdigits(0), | |
56 | fDigits(0) | |
57 | ||
9e04c3b6 | 58 | { |
b0d2c2d3 | 59 | // default constructor |
60 | ||
0b2bea8b | 61 | // fNdigits = 0; |
62 | // fDigits = 0; | |
63 | // | |
64 | // fPhotoCathodeEfficiency = 0.18; | |
65 | // fPMVoltage = 768.0; | |
66 | // fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277); | |
ce7090f5 | 67 | |
0b2bea8b | 68 | // fCalibData = GetCalibData(); |
9e04c3b6 | 69 | } |
70 | ||
71 | //____________________________________________________________________________ | |
72 | AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager) | |
0b2bea8b | 73 | :AliDigitizer(manager), |
74 | fCalibData(GetCalibData()), | |
75 | fPhotoCathodeEfficiency(0.18), | |
76 | fPMVoltage(768.0), | |
77 | fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)), | |
78 | fNdigits(0), | |
79 | fDigits(0) | |
80 | ||
9e04c3b6 | 81 | { |
82 | // constructor | |
83 | ||
0b2bea8b | 84 | // fNdigits = 0; |
85 | // fDigits = 0; | |
86 | // | |
87 | // fPhotoCathodeEfficiency = 0.18; | |
88 | // fPMVoltage = 768.0; | |
89 | // fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 ); | |
ce7090f5 | 90 | |
0b2bea8b | 91 | // fCalibData = GetCalibData(); |
ce7090f5 | 92 | |
9e04c3b6 | 93 | } |
94 | ||
95 | //____________________________________________________________________________ | |
96 | AliVZERODigitizer::~AliVZERODigitizer() | |
97 | { | |
98 | // destructor | |
99 | ||
100 | if (fDigits) { | |
101 | fDigits->Delete(); | |
102 | delete fDigits; | |
b0d2c2d3 | 103 | fDigits=0; |
104 | } | |
9e04c3b6 | 105 | } |
106 | ||
b0d2c2d3 | 107 | //_____________________________________________________________________________ |
108 | Bool_t AliVZERODigitizer::Init() | |
9e04c3b6 | 109 | { |
b0d2c2d3 | 110 | // Initialises the digitizer |
9e04c3b6 | 111 | |
b0d2c2d3 | 112 | // Initialises the Digit array |
9e04c3b6 | 113 | fDigits = new TClonesArray ("AliVZEROdigit", 1000); |
114 | ||
b0d2c2d3 | 115 | return kTRUE; |
9e04c3b6 | 116 | } |
117 | ||
118 | //____________________________________________________________________________ | |
b0d2c2d3 | 119 | void AliVZERODigitizer::Exec(Option_t* /*option*/) |
ce7090f5 | 120 | { |
b0d2c2d3 | 121 | // Creates digits from hits |
ce7090f5 | 122 | |
20277079 | 123 | Int_t map[80]; // 48 values on V0C + 32 on V0A |
124 | Int_t adc[64]; // 32 PMs on V0C + 32 PMs on V0A | |
c299dbe4 | 125 | Float_t time[80], time_ref[80], time2[64]; |
126 | Float_t adc_gain[80]; | |
ce7090f5 | 127 | fNdigits = 0; |
128 | Float_t cPM = fPhotoCathodeEfficiency * fPMGain; | |
129 | ||
130 | // Retrieval of ADC gain values from local CDB | |
131 | // I use only the first 64th values of the calibration array in CDB | |
132 | // as I have no beam burst structure - odd or even beam burst number | |
b0d2c2d3 | 133 | |
ce7090f5 | 134 | // Reminder : We have 16 scintillating cells mounted on 8 PMs |
20277079 | 135 | // on Ring 3 and Ring 4 in V0C - added to produce ADC outputs |
136 | // on these rings... | |
ce7090f5 | 137 | |
138 | for(Int_t i=0; i<16; i++) { adc_gain[i] = fCalibData->GetGain(i) ; }; | |
139 | ||
140 | for(Int_t j=16; j<48; j=j+2) { | |
141 | Int_t i=(j+17)/2; | |
142 | adc_gain[j] = fCalibData->GetGain(i) ; | |
143 | adc_gain[j+1] = fCalibData->GetGain(i) ; } | |
144 | for(Int_t i=48; i<80; i++) { adc_gain[i] = fCalibData->GetGain(i-16) ; } | |
145 | ||
146 | // for(Int_t i=0; i<80; i++) { printf(" i = %d gain = %f\n\n", i, adc_gain[i] );} | |
147 | ||
b0d2c2d3 | 148 | AliRunLoader* outRunLoader = |
149 | AliRunLoader::GetRunLoader(fManager->GetOutputFolderName()); | |
150 | if (!outRunLoader) { | |
151 | Error("Exec", "Can not get output Run Loader"); | |
ce7090f5 | 152 | return;} |
153 | ||
b0d2c2d3 | 154 | AliLoader* outLoader = outRunLoader->GetLoader("VZEROLoader"); |
155 | if (!outLoader) { | |
156 | Error("Exec", "Can not get output VZERO Loader"); | |
ce7090f5 | 157 | return;} |
b0d2c2d3 | 158 | |
159 | outLoader->LoadDigits("update"); | |
160 | if (!outLoader->TreeD()) outLoader->MakeTree("D"); | |
161 | outLoader->MakeDigitsContainer(); | |
ce7090f5 | 162 | TTree* treeD = outLoader->TreeD(); |
b0d2c2d3 | 163 | Int_t bufsize = 16000; |
164 | treeD->Branch("VZERODigit", &fDigits, bufsize); | |
c299dbe4 | 165 | |
b0d2c2d3 | 166 | for (Int_t iInput = 0; iInput < fManager->GetNinputs(); iInput++) { |
167 | AliRunLoader* runLoader = | |
168 | AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput)); | |
169 | AliLoader* loader = runLoader->GetLoader("VZEROLoader"); | |
170 | if (!loader) { | |
171 | Error("Exec", "Can not get VZERO Loader for input %d", iInput); | |
ce7090f5 | 172 | continue;} |
173 | ||
b0d2c2d3 | 174 | if (!runLoader->GetAliRun()) runLoader->LoadgAlice(); |
175 | ||
176 | AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO"); | |
177 | if (!vzero) { | |
178 | Error("Exec", "No VZERO detector for input %d", iInput); | |
ce7090f5 | 179 | continue;} |
9e04c3b6 | 180 | |
b0d2c2d3 | 181 | loader->LoadHits(); |
182 | TTree* treeH = loader->TreeH(); | |
183 | if (!treeH) { | |
184 | Error("Exec", "Cannot get TreeH for input %d", iInput); | |
ce7090f5 | 185 | continue; } |
c299dbe4 | 186 | |
187 | for(Int_t i=0; i<80; i++) {map[i] = 0; time[i] = 0.0;} | |
841137ce | 188 | |
b0d2c2d3 | 189 | TClonesArray* hits = vzero->Hits(); |
9e04c3b6 | 190 | |
b0d2c2d3 | 191 | // Now makes Digits from hits |
9e04c3b6 | 192 | |
b0d2c2d3 | 193 | Int_t nTracks = (Int_t) treeH->GetEntries(); |
194 | for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) { | |
c299dbe4 | 195 | for (Int_t i=0; i<80; i++) {time_ref[i] = 999999.0;} |
b0d2c2d3 | 196 | vzero->ResetHits(); |
197 | treeH->GetEvent(iTrack); | |
198 | Int_t nHits = hits->GetEntriesFast(); | |
199 | for (Int_t iHit = 0; iHit < nHits; iHit++) { | |
200 | AliVZEROhit* hit = (AliVZEROhit *)hits->UncheckedAt(iHit); | |
201 | Int_t nPhot = hit->Nphot(); | |
202 | Int_t cell = hit->Cell(); | |
20277079 | 203 | map[cell] += nPhot; |
204 | Float_t dt_scintillator = gRandom->Gaus(0,0.7); | |
c299dbe4 | 205 | Float_t t = dt_scintillator + 1e9*hit->Tof(); |
206 | if (t > 0.0) { | |
207 | if(t < time_ref[cell]) time_ref[cell] = t; | |
208 | time[cell] = TMath::Min(t,time_ref[cell]); | |
209 | } | |
210 | } // hit loop | |
b0d2c2d3 | 211 | } // track loop |
212 | ||
213 | loader->UnloadHits(); | |
214 | ||
215 | } // input loop | |
20277079 | 216 | |
217 | // Now builds the scintillator cell response (80 cells i.e. 80 responses) | |
841137ce | 218 | |
20277079 | 219 | for (Int_t i=0; i<80; i++) { |
220 | Float_t q1 = Float_t ( map[i] )* cPM * kQe; | |
221 | Float_t noise = gRandom->Gaus(10.5,3.22); | |
222 | Float_t pmResponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau)) | |
223 | + noise*1e-3; | |
224 | map[i] = Int_t( pmResponse * adc_gain[i]); | |
225 | } | |
c299dbe4 | 226 | |
20277079 | 227 | // Now transforms 80 cell responses into 64 photomultiplier responses |
228 | ||
229 | for (Int_t j=0; j<32; j++){ | |
230 | adc[j] = map [j]; | |
231 | time2[j]= time[j];} | |
232 | ||
233 | for (Int_t j=48; j<80; j++){ | |
234 | adc[j-16] = map [j]; | |
235 | time2[j-16]= time[j];} | |
236 | ||
237 | for (Int_t j=0; j<16; j++){ | |
c299dbe4 | 238 | adc[16+j] = map [16+2*j]+ map [16+2*j+1]; |
239 | Float_t min_time = TMath::Min(time [16+2*j],time [16+2*j+1]); | |
240 | time2[16+j] = min_time; | |
241 | if(min_time==0.0) { | |
242 | time2[16+j] = TMath::Max(time[16+2*j],time[16+2*j+1]); | |
243 | } | |
244 | } | |
245 | ||
246 | ||
20277079 | 247 | // Now add digits to the digit Tree |
248 | ||
249 | for (Int_t i=0; i<64; i++) { | |
250 | if(adc[i] > 0) { | |
c299dbe4 | 251 | // printf(" Event, cell, adc, tof = %d %d %d %f\n", |
252 | // outRunLoader->GetEventNumber(),i, map[i], time2[i]*10.0); | |
5c1828c2 | 253 | // multiply by 10 to have 100 ps per channel : |
20277079 | 254 | AddDigit(i, adc[i], Int_t(time2[i]*10.0) ); |
255 | } | |
256 | } | |
c299dbe4 | 257 | |
b0d2c2d3 | 258 | treeD->Fill(); |
259 | outLoader->WriteDigits("OVERWRITE"); | |
260 | outLoader->UnloadDigits(); | |
261 | ResetDigit(); | |
9e04c3b6 | 262 | } |
263 | ||
264 | //____________________________________________________________________________ | |
20277079 | 265 | void AliVZERODigitizer::AddDigit(Int_t PMnumber, Int_t adc, Int_t time) |
9e04c3b6 | 266 | { |
267 | ||
268 | // Adds Digit | |
269 | ||
270 | TClonesArray &ldigits = *fDigits; | |
20277079 | 271 | new(ldigits[fNdigits++]) AliVZEROdigit(PMnumber,adc,time); |
9e04c3b6 | 272 | } |
273 | //____________________________________________________________________________ | |
274 | void AliVZERODigitizer::ResetDigit() | |
275 | { | |
b0d2c2d3 | 276 | // |
9e04c3b6 | 277 | // Clears Digits |
b0d2c2d3 | 278 | // |
9e04c3b6 | 279 | fNdigits = 0; |
b0d2c2d3 | 280 | if (fDigits) fDigits->Delete(); |
9e04c3b6 | 281 | } |
ce7090f5 | 282 | |
283 | //____________________________________________________________________________ | |
284 | AliVZEROCalibData* AliVZERODigitizer::GetCalibData() const | |
285 | ||
286 | { | |
c0b82b5a | 287 | AliCDBManager *man = AliCDBManager::Instance(); |
ce7090f5 | 288 | |
c0b82b5a | 289 | AliCDBEntry *entry=0; |
ce7090f5 | 290 | |
c0b82b5a | 291 | entry = man->Get("VZERO/Calib/Data"); |
292 | ||
293 | if(!entry){ | |
294 | AliWarning("Load of calibration data from default storage failed!"); | |
295 | AliWarning("Calibration data will be loaded from local storage ($ALICE_ROOT)"); | |
296 | Int_t runNumber = man->GetRun(); | |
297 | entry = man->GetStorage("local://$ALICE_ROOT") | |
298 | ->Get("VZERO/Calib/Data",runNumber); | |
299 | ||
300 | } | |
301 | ||
302 | // Retrieval of data in directory VZERO/Calib/Data: | |
ce7090f5 | 303 | |
ce7090f5 | 304 | |
c0b82b5a | 305 | AliVZEROCalibData *calibdata = 0; |
ce7090f5 | 306 | |
c0b82b5a | 307 | if (entry) calibdata = (AliVZEROCalibData*) entry->GetObject(); |
308 | if (!calibdata) AliError("No calibration data from calibration database !"); | |
ce7090f5 | 309 | |
c0b82b5a | 310 | return calibdata; |
ce7090f5 | 311 | |
312 | } | |
313 |