Script to create a random bad channel map.
[u/mrichter/AliRoot.git] / VZERO / AliVZERODigitizer.cxx
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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>
8bd3e27a 29#include <TGeoManager.h>
30#include <TGeoPhysicalNode.h>
31#include <AliGeomManager.h>
e939a978 32#include <TRandom.h>
9e04c3b6 33
34// --- AliRoot header files ---
35#include "AliVZEROConst.h"
36#include "AliRun.h"
37#include "AliVZERO.h"
38#include "AliVZEROhit.h"
9e04c3b6 39#include "AliRunLoader.h"
40#include "AliLoader.h"
9e04c3b6 41#include "AliRunDigitizer.h"
ce7090f5 42#include "AliCDBManager.h"
43#include "AliCDBStorage.h"
44#include "AliCDBEntry.h"
45#include "AliVZEROCalibData.h"
46
9e04c3b6 47#include "AliVZEROdigit.h"
b0d2c2d3 48#include "AliVZERODigitizer.h"
9e04c3b6 49
50ClassImp(AliVZERODigitizer)
51
52 AliVZERODigitizer::AliVZERODigitizer()
0b2bea8b 53 :AliDigitizer(),
54 fCalibData(GetCalibData()),
55 fPhotoCathodeEfficiency(0.18),
56 fPMVoltage(768.0),
57 fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)),
58 fNdigits(0),
59 fDigits(0)
60
9e04c3b6 61{
b0d2c2d3 62 // default constructor
63
0b2bea8b 64// fNdigits = 0;
65// fDigits = 0;
66//
67// fPhotoCathodeEfficiency = 0.18;
68// fPMVoltage = 768.0;
69// fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277);
ce7090f5 70
0b2bea8b 71// fCalibData = GetCalibData();
9e04c3b6 72}
73
74//____________________________________________________________________________
75 AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager)
0b2bea8b 76 :AliDigitizer(manager),
77 fCalibData(GetCalibData()),
78 fPhotoCathodeEfficiency(0.18),
79 fPMVoltage(768.0),
80 fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)),
81 fNdigits(0),
82 fDigits(0)
83
9e04c3b6 84{
85 // constructor
86
0b2bea8b 87// fNdigits = 0;
88// fDigits = 0;
89//
90// fPhotoCathodeEfficiency = 0.18;
91// fPMVoltage = 768.0;
92// fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 );
ce7090f5 93
0b2bea8b 94// fCalibData = GetCalibData();
ce7090f5 95
9e04c3b6 96}
97
98//____________________________________________________________________________
99 AliVZERODigitizer::~AliVZERODigitizer()
100{
101 // destructor
102
103 if (fDigits) {
104 fDigits->Delete();
105 delete fDigits;
b0d2c2d3 106 fDigits=0;
107 }
9e04c3b6 108}
109
b0d2c2d3 110//_____________________________________________________________________________
111Bool_t AliVZERODigitizer::Init()
9e04c3b6 112{
b0d2c2d3 113 // Initialises the digitizer
9e04c3b6 114
b0d2c2d3 115 // Initialises the Digit array
9e04c3b6 116 fDigits = new TClonesArray ("AliVZEROdigit", 1000);
8bd3e27a 117
c61a7285 118 // TGeoHMatrix *im = AliGeomManager::GetMatrix("VZERO/V0C");
119 // im->Print();
8bd3e27a 120
b0d2c2d3 121 return kTRUE;
9e04c3b6 122}
123
124//____________________________________________________________________________
b0d2c2d3 125void AliVZERODigitizer::Exec(Option_t* /*option*/)
ce7090f5 126{
b0d2c2d3 127 // Creates digits from hits
ce7090f5 128
20277079 129 Int_t map[80]; // 48 values on V0C + 32 on V0A
130 Int_t adc[64]; // 32 PMs on V0C + 32 PMs on V0A
8bd3e27a 131 Float_t time[80], time_ref[80], time2[64];
132 Float_t adc_gain[80];
133 Float_t adc_pedestal[64],adc_sigma[64];
ce7090f5 134 fNdigits = 0;
8bd3e27a 135 Float_t PMGain_smeared[64];
136 Float_t cPM[80];
137
138 // Smearing of the PM tubes intrinsic characteristics
139
140 for(Int_t ii=0; ii<64; ii++) {
141 PMGain_smeared[ii] = gRandom->Gaus(fPMGain, fPMGain/5); }
142
143 // Retrieval of ADC gain values and pedestal information from local CDB
ce7090f5 144 // I use only the first 64th values of the calibration array in CDB
145 // as I have no beam burst structure - odd or even beam burst number
b0d2c2d3 146
ce7090f5 147 // Reminder : We have 16 scintillating cells mounted on 8 PMs
20277079 148 // on Ring 3 and Ring 4 in V0C - added to produce ADC outputs
149 // on these rings...
ce7090f5 150
8bd3e27a 151 for(Int_t i=0; i<16; i++) {
152 adc_gain[i] = fCalibData->GetGain(i);
153 cPM[i] = fPhotoCathodeEfficiency * PMGain_smeared[i];}
ce7090f5 154
155 for(Int_t j=16; j<48; j=j+2) {
156 Int_t i=(j+17)/2;
8bd3e27a 157 adc_gain[j] = fCalibData->GetGain(i);
158 adc_gain[j+1] = fCalibData->GetGain(i);
159 cPM[j] = fPhotoCathodeEfficiency * PMGain_smeared[i];
160 cPM[j+1] = fPhotoCathodeEfficiency * PMGain_smeared[i]; }
161
162 for(Int_t i=48; i<80; i++){
163 adc_gain[i] = fCalibData->GetGain(i-16);
164 cPM[i] = fPhotoCathodeEfficiency * PMGain_smeared[i-16];};
ce7090f5 165
8bd3e27a 166 for(Int_t i=0; i<64; i++){ adc_pedestal[i] = fCalibData->GetPedestal(i);
167 adc_sigma[i] = fCalibData->GetSigma(i); };
168
169// for(Int_t i=0; i<64; i++) { printf(" i = %d pedestal = %f sigma = %f \n\n",
170// i, adc_pedestal[i], adc_sigma[i] );}
ce7090f5 171
b0d2c2d3 172 AliRunLoader* outRunLoader =
173 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
174 if (!outRunLoader) {
175 Error("Exec", "Can not get output Run Loader");
ce7090f5 176 return;}
177
b0d2c2d3 178 AliLoader* outLoader = outRunLoader->GetLoader("VZEROLoader");
179 if (!outLoader) {
180 Error("Exec", "Can not get output VZERO Loader");
ce7090f5 181 return;}
b0d2c2d3 182
183 outLoader->LoadDigits("update");
184 if (!outLoader->TreeD()) outLoader->MakeTree("D");
185 outLoader->MakeDigitsContainer();
ce7090f5 186 TTree* treeD = outLoader->TreeD();
b0d2c2d3 187 Int_t bufsize = 16000;
188 treeD->Branch("VZERODigit", &fDigits, bufsize);
c299dbe4 189
b0d2c2d3 190 for (Int_t iInput = 0; iInput < fManager->GetNinputs(); iInput++) {
8bd3e27a 191 AliRunLoader* runLoader =
192 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
193 AliLoader* loader = runLoader->GetLoader("VZEROLoader");
194 if (!loader) {
195 Error("Exec", "Can not get VZERO Loader for input %d", iInput);
196 continue;}
ce7090f5 197
8bd3e27a 198 if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
b0d2c2d3 199
8bd3e27a 200 AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO");
201 if (!vzero) {
202 Error("Exec", "No VZERO detector for input %d", iInput);
203 continue;}
9e04c3b6 204
8bd3e27a 205 loader->LoadHits();
206 TTree* treeH = loader->TreeH();
207 if (!treeH) {
208 Error("Exec", "Cannot get TreeH for input %d", iInput);
209 continue; }
c299dbe4 210
8bd3e27a 211 for(Int_t i=0; i<80; i++) {map[i] = 0; time[i] = 0.0;}
841137ce 212
8bd3e27a 213 TClonesArray* hits = vzero->Hits();
9e04c3b6 214
b0d2c2d3 215// Now makes Digits from hits
9e04c3b6 216
8bd3e27a 217 Int_t nTracks = (Int_t) treeH->GetEntries();
218 for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
219 for (Int_t i=0; i<80; i++) {time_ref[i] = 999999.0;}
220 vzero->ResetHits();
221 treeH->GetEvent(iTrack);
222 Int_t nHits = hits->GetEntriesFast();
223 for (Int_t iHit = 0; iHit < nHits; iHit++) {
224 AliVZEROhit* hit = (AliVZEROhit *)hits->UncheckedAt(iHit);
225 Int_t nPhot = hit->Nphot();
226 Int_t cell = hit->Cell();
227 map[cell] += nPhot;
228 Float_t dt_scintillator = gRandom->Gaus(0,0.7);
229 Float_t t = dt_scintillator + 1e9*hit->Tof();
230 if (t > 0.0) {
231 if(t < time_ref[cell]) time_ref[cell] = t;
232 time[cell] = TMath::Min(t,time_ref[cell]); }
233 } // hit loop
234 } // track loop
b0d2c2d3 235
8bd3e27a 236 loader->UnloadHits();
b0d2c2d3 237
238 } // input loop
20277079 239
240// Now builds the scintillator cell response (80 cells i.e. 80 responses)
841137ce 241
20277079 242 for (Int_t i=0; i<80; i++) {
8bd3e27a 243 Float_t q1 = Float_t ( map[i] )* cPM[i] * kQe;
20277079 244 Float_t noise = gRandom->Gaus(10.5,3.22);
245 Float_t pmResponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau))
8bd3e27a 246 + noise*1e-3;
20277079 247 map[i] = Int_t( pmResponse * adc_gain[i]);
8bd3e27a 248 if(map[i] > (110/2)) {map[i] = Int_t(gRandom->Gaus(map[i], 110/6));}
20277079 249 }
c299dbe4 250
8bd3e27a 251// Now transforms 80 cell responses into 64 photomultiplier responses
252// Also adds the ADC pedestals taken out of the calibration data base
20277079 253
8bd3e27a 254 for (Int_t j=0; j<16; j++){
c61a7285 255 adc[j] = static_cast<Int_t>(map [j] + gRandom->Gaus(adc_pedestal[j], adc_sigma[j]));
20277079 256 time2[j]= time[j];}
257
258 for (Int_t j=48; j<80; j++){
c61a7285 259 adc[j-16] = static_cast<Int_t>(map [j]
260 + gRandom->Gaus(adc_pedestal[j-16],adc_sigma[j-16]));
8bd3e27a 261 time2[j-16]= time[j]; }
20277079 262
263 for (Int_t j=0; j<16; j++){
c61a7285 264 adc[16+j] = static_cast<Int_t>(map [16+2*j]+ map [16+2*j+1]
265 + gRandom->Gaus(adc_pedestal[16+j], adc_sigma[16+j]));
c299dbe4 266 Float_t min_time = TMath::Min(time [16+2*j],time [16+2*j+1]);
267 time2[16+j] = min_time;
8bd3e27a 268 if(min_time==0.0){time2[16+j]=TMath::Max(time[16+2*j],time[16+2*j+1]);}
c299dbe4 269 }
270
271
20277079 272// Now add digits to the digit Tree
273
274 for (Int_t i=0; i<64; i++) {
275 if(adc[i] > 0) {
8bd3e27a 276// printf(" Event, cell, adc, tof = %d %d %d %f\n",
277// outRunLoader->GetEventNumber(),i, map[i], time2[i]*10.0);
278// multiply by 10 to have 100 ps per channel :
279 AddDigit(i, adc[i], Int_t(time2[i]*10.0)) ;}
20277079 280 }
c299dbe4 281
b0d2c2d3 282 treeD->Fill();
283 outLoader->WriteDigits("OVERWRITE");
284 outLoader->UnloadDigits();
285 ResetDigit();
9e04c3b6 286}
287
288//____________________________________________________________________________
20277079 289void AliVZERODigitizer::AddDigit(Int_t PMnumber, Int_t adc, Int_t time)
9e04c3b6 290 {
291
292// Adds Digit
293
294 TClonesArray &ldigits = *fDigits;
20277079 295 new(ldigits[fNdigits++]) AliVZEROdigit(PMnumber,adc,time);
9e04c3b6 296}
297//____________________________________________________________________________
298void AliVZERODigitizer::ResetDigit()
299{
b0d2c2d3 300//
9e04c3b6 301// Clears Digits
b0d2c2d3 302//
9e04c3b6 303 fNdigits = 0;
b0d2c2d3 304 if (fDigits) fDigits->Delete();
9e04c3b6 305}
ce7090f5 306
307//____________________________________________________________________________
308AliVZEROCalibData* AliVZERODigitizer::GetCalibData() const
309
310{
c0b82b5a 311 AliCDBManager *man = AliCDBManager::Instance();
ce7090f5 312
c0b82b5a 313 AliCDBEntry *entry=0;
ce7090f5 314
c0b82b5a 315 entry = man->Get("VZERO/Calib/Data");
316
df791951 317// if(!entry){
318// AliWarning("Load of calibration data from default storage failed!");
319// AliWarning("Calibration data will be loaded from local storage ($ALICE_ROOT)");
320// Int_t runNumber = man->GetRun();
321// entry = man->GetStorage("local://$ALICE_ROOT")
322// ->Get("VZERO/Calib/Data",runNumber);
323//
324// }
c0b82b5a 325
326 // Retrieval of data in directory VZERO/Calib/Data:
ce7090f5 327
ce7090f5 328
c0b82b5a 329 AliVZEROCalibData *calibdata = 0;
ce7090f5 330
c0b82b5a 331 if (entry) calibdata = (AliVZEROCalibData*) entry->GetObject();
df791951 332 if (!calibdata) AliFatal("No calibration data from calibration database !");
ce7090f5 333
c0b82b5a 334 return calibdata;
ce7090f5 335
336}
337