1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // ZDC digitizer class //
22 ///////////////////////////////////////////////////////////////////////////////
32 // --- AliRoot header files
35 #include "AliHeader.h"
36 #include "AliGenHijingEventHeader.h"
37 #include "AliRunDigitizer.h"
38 #include "AliRunLoader.h"
39 #include "AliCDBManager.h"
40 #include "AliCDBEntry.h"
41 #include "AliZDCSDigit.h"
42 #include "AliZDCDigit.h"
43 #include "AliZDCFragment.h"
45 #include "AliZDCDigitizer.h"
48 class AliZDCPedestals;
50 class AliZDCTowerCalib;
52 ClassImp(AliZDCDigitizer)
55 //____________________________________________________________________________
56 AliZDCDigitizer::AliZDCDigitizer() :
58 fIsSignalInADCGate(kFALSE),
63 fSpectators2Track(kFALSE)
65 // Default constructor
69 //____________________________________________________________________________
70 AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
71 AliDigitizer(manager),
72 fIsCalibration(0), //By default the simulation doesn't create calib. data
73 fIsSignalInADCGate(kFALSE),
75 fPedData(GetPedData()),
76 fEnCalibData(GetEnCalibData()),
77 fTowCalibData(GetTowCalibData()),
78 fSpectators2Track(kFALSE)
80 // Get calibration data
81 if(fIsCalibration!=0) printf("\n\t AliZDCDigitizer -> Creating calibration data (pedestals)\n");
85 //____________________________________________________________________________
86 AliZDCDigitizer::~AliZDCDigitizer()
93 //____________________________________________________________________________
94 AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
96 fIsCalibration(digitizer.fIsCalibration),
97 fIsSignalInADCGate(digitizer.fIsSignalInADCGate),
98 fFracLostSignal(digitizer.fFracLostSignal),
99 fPedData(digitizer.fPedData),
100 fEnCalibData(digitizer.fEnCalibData),
101 fTowCalibData(digitizer.fTowCalibData),
102 fSpectators2Track(digitizer.fSpectators2Track)
106 for(Int_t i=0; i<6; i++){
107 for(Int_t j=0; j<5; j++){
108 fPMGain[i][j] = digitizer.fPMGain[i][j];
111 for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
115 //____________________________________________________________________________
116 Bool_t AliZDCDigitizer::Init()
118 // Initialize the digitizer
119 // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
120 for(Int_t j = 0; j < 5; j++){
121 fPMGain[0][j] = 50000.;
122 fPMGain[1][j] = 100000.;
123 fPMGain[2][j] = 100000.;
124 fPMGain[3][j] = 50000.;
125 fPMGain[4][j] = 100000.;
126 fPMGain[5][j] = 100000.;
129 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
130 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
135 //____________________________________________________________________________
136 void AliZDCDigitizer::Exec(Option_t* /*option*/)
138 // Execute digitization
140 // ------------------------------------------------------------
141 // !!! 2nd ZDC set added
142 // *** 1st 3 arrays are digits from REAL (simulated) hits
143 // *** last 2 are copied from simulated digits
144 // --- pm[0][...] = light in ZN side C [C, Q1, Q2, Q3, Q4]
145 // --- pm[1][...] = light in ZP side C [C, Q1, Q2, Q3, Q4]
146 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
147 // --- pm[3][...] = light in ZN side A [C, Q1, Q2, Q3, Q4] ->NEW!
148 // --- pm[4][...] = light in ZP side A [C, Q1, Q2, Q3, Q4] ->NEW!
149 // ------------------------------------------------------------
151 for(Int_t iSector1=0; iSector1<5; iSector1++)
152 for(Int_t iSector2=0; iSector2<5; iSector2++){
153 pm[iSector1][iSector2] = 0;
156 // ------------------------------------------------------------
157 // ### Out of time ADC added (22 channels)
158 // --- same codification as for signal PTMs (see above)
159 // ------------------------------------------------------------
161 for(Int_t iSector1=0; iSector1<5; iSector1++)
162 for(Int_t iSector2=0; iSector2<5; iSector2++){
163 pmoot[iSector1][iSector2] = 0;
166 // impact parameter and number of spectators
168 Int_t specNTarg = 0, specPTarg = 0;
169 Int_t specNProj = 0, specPProj = 0;
170 Float_t signalTime0 = 0.;
172 // loop over input streams
173 for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
175 // get run loader and ZDC loader
176 AliRunLoader* runLoader =
177 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
178 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
179 if(!loader) continue;
182 loader->LoadSDigits();
183 TTree* treeS = loader->TreeS();
186 AliZDCSDigit* psdigit = &sdigit;
187 treeS->SetBranchAddress("ZDC", &psdigit);
190 for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
191 treeS->GetEntry(iSDigit);
193 if(!psdigit) continue;
194 if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
195 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
196 sdigit.GetSector(0), sdigit.GetSector(1)));
199 // Checking if signal is inside ADC gate
200 if(iSDigit==0) signalTime0 = sdigit.GetTrackTime();
202 // Assuming a signal lenght of 20 ns, signal is in gate if
203 // signal ENDS in signalTime0+50. -> sdigit.GetTrackTime()+20<=signalTime0+50.
204 if(sdigit.GetTrackTime()<=signalTime0+30.) fIsSignalInADCGate = kTRUE;
205 if(sdigit.GetTrackTime()>signalTime0+30.){
206 fIsSignalInADCGate = kFALSE;
207 // Vedi quaderno per spiegazione approx. usata
208 // nel calcolo della fraz. di segnale perso
209 fFracLostSignal = (sdigit.GetTrackTime()-30)*(sdigit.GetTrackTime()-30)/280.;
212 Float_t sdSignal = sdigit.GetLightPM();
213 if(fIsSignalInADCGate == kFALSE){
214 AliDebug(2,Form("\t Signal time %f -> fraction %f of ZDC signal for det.(%d, %d) out of ADC gate\n",
215 sdigit.GetTrackTime(),fFracLostSignal,sdigit.GetSector(0),sdigit.GetSector(1)));
216 sdSignal = (1-fFracLostSignal)*sdSignal;
219 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
220 /*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
221 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
222 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
227 loader->UnloadSDigits();
229 // get the impact parameter and the number of spectators in case of hijing
230 if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
231 AliHeader* header = runLoader->GetHeader();
232 if(!header) continue;
233 AliGenEventHeader* genHeader = header->GenEventHeader();
234 if(!genHeader) continue;
235 if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
237 if(fSpectators2Track==kTRUE){
238 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
239 specNProj = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
240 specPProj = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
241 specNTarg = ((AliGenHijingEventHeader*) genHeader)->TargSpectatorsn();
242 specPTarg = ((AliGenHijingEventHeader*) genHeader)->TargSpectatorsp();
243 printf("\n\t AliZDCDigitizer: b = %1.2f fm\n"
244 " \t PROJ.: #spectator n %d, #spectator p %d\n"
245 " \t TARG.: #spectator n %d, #spectator p %d\n\n",
246 impPar, specNProj, specPProj, specNTarg, specPTarg);
251 // Applying fragmentation algorithm and adding spectator signal
252 if(fSpectators2Track==kTRUE && impPar) {
253 Int_t freeSpecNProj, freeSpecPProj;
254 Fragmentation(impPar, specNProj, specPProj, freeSpecNProj, freeSpecPProj);
255 Int_t freeSpecNTarg, freeSpecPTarg;
256 Fragmentation(impPar, specNTarg, specPTarg, freeSpecNTarg, freeSpecPTarg);
257 SpectatorSignal(1, freeSpecNProj, pm);
258 //printf(" AliZDCDigitizer -> Signal for %d PROJ free spectator n",freeSpecNProj);
259 SpectatorSignal(2, freeSpecPProj, pm);
260 //printf(" and %d free spectator p added\n",freeSpecPProj);
261 SpectatorSignal(3, freeSpecNTarg, pm);
262 //printf(" AliZDCDigitizer -> Signal for %d TARG free spectator n",freeSpecNTarg);
263 SpectatorSignal(4, freeSpecPTarg, pm);
264 //printf("and %d free spectator p added\n",freeSpecPTarg);
268 // get the output run loader and loader
269 AliRunLoader* runLoader =
270 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
271 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
273 AliError("no ZDC loader found");
277 // create the output tree
278 const char* mode = "update";
279 if(runLoader->GetEventNumber() == 0) mode = "recreate";
280 loader->LoadDigits(mode);
281 loader->MakeTree("D");
282 TTree* treeD = loader->TreeD();
284 AliZDCDigit* pdigit = &digit;
285 const Int_t kBufferSize = 4000;
286 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
290 Int_t digi[2], digioot[2];
291 for(sector[0]=1; sector[0]<6; sector[0]++){
292 for(sector[1]=0; sector[1]<5; sector[1]++){
293 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
294 for(Int_t res=0; res<2; res++){
295 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
296 + Pedestal(sector[0], sector[1], res);
298 /*printf("\t DIGIT added -> det %d quad %d - digi[0,1] = [%d, %d]\n",
299 sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
302 new(pdigit) AliZDCDigit(sector, digi);
305 } // Loop over detector
306 // Adding in-time digits for 2 reference PTM signals (after signal ch.)
307 // (for the moment the ref. signal is completely invented assuming a PMgain of 5*10^4!)
311 // Reference signal are set to 100 (high gain chain) and 800 (low gain chain)
312 if(fIsCalibration==0) {sigRef[0]=100; sigRef[1]=800;}
313 else {sigRef[0]=0; sigRef[1]=0;} // calibration -> simulation of pedestal values
315 for(Int_t iref=0; iref<2; iref++){
316 sectorRef[0] = 3*iref+1;
317 for(Int_t res=0; res<2; res++){
318 sigRef[res] += Pedestal(sectorRef[0], sectorRef[1], res);
320 /*printf("\t RefDigit added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
321 sectorRef[0], sectorRef[1], sigRef[0], sigRef[1]); // Chiara debugging!
323 new(pdigit) AliZDCDigit(sectorRef, sigRef);
327 // --- Adding digits for out-of-time channels after signal digits
328 for(sector[0]=1; sector[0]<6; sector[0]++){
329 for(sector[1]=0; sector[1]<5; sector[1]++){
330 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
331 for(Int_t res=0; res<2; res++){
332 digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
334 /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
335 sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
338 new(pdigit) AliZDCDigit(sector, digioot);
342 // Adding out-of-time digits for 2 reference PTM signals (after out-of-time ch.)
344 for(Int_t iref=0; iref<2; iref++){
345 sectorRef[0] = 3*iref+1;
346 for(Int_t res=0; res<2; res++){
347 sigRefoot[res] = Pedestal(sectorRef[0], sectorRef[1], res);
349 /*printf("\t RefDigitoot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
350 sectorRef[0], sectorRef[1], sigRefoot[0], sigRefoot[1]); // Chiara debugging!
352 new(pdigit) AliZDCDigit(sectorRef, sigRefoot);
355 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
357 // write the output tree
358 loader->WriteDigits("OVERWRITE");
359 loader->UnloadDigits();
363 //_____________________________________________________________________________
364 void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
365 Int_t &freeSpecN, Int_t &freeSpecP) const
367 // simulate fragmentation of spectators
369 AliZDCFragment frag(impPar);
371 // Fragments generation
373 Int_t nAlpha = frag.GetNalpha();
376 Int_t ztot = frag.GetZtot();
377 Int_t ntot = frag.GetNtot();
378 frag.AttachNeutrons();
379 freeSpecN = specN-ntot-2*nAlpha;
380 freeSpecP = specP-ztot-2*nAlpha;
381 // Removing deuterons
382 Int_t ndeu = (Int_t) (freeSpecN*frag.DeuteronNumber());
385 if(freeSpecN<0) freeSpecN=0;
386 if(freeSpecP<0) freeSpecP=0;
387 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
390 //_____________________________________________________________________________
391 void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
392 Float_t pm[5][5]) const
394 // add signal of the spectators
397 if(SpecType == 1) { // --- Signal for projectile spectator neutrons
398 hfn = "$ALICE_ROOT/ZDC/ZNCSignal.root";
400 else if(SpecType == 2) { // --- Signal for projectile spectator protons
401 hfn = "$ALICE_ROOT/ZDC/ZPCSignal.root";
403 else if(SpecType == 3) { // --- Signal for target spectator neutrons
404 hfn = "$ALICE_ROOT/ZDC/ZNASignal.root";
406 else if(SpecType == 4) { // --- Signal for target spectator protons
407 hfn = "$ALICE_ROOT/ZDC/ZPASignal.root";
410 TFile* file = TFile::Open(hfn);
411 if(!file || !file->IsOpen()) {
412 AliError((Form(" Opening file %s failed\n",hfn.Data())));
416 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
417 Int_t nentries = (Int_t) zdcSignal->GetEntries();
420 Int_t pl, i, k, iev=0, rnd[125], volume[2];
421 for(pl=0;pl<125;pl++) rnd[pl] = 0;
422 if(numEvents > 125) {
423 AliDebug(2,Form("numEvents (%d) is larger than 125", numEvents));
426 for(pl=0;pl<numEvents;pl++){
427 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
428 if(rnd[pl] >= 9999) rnd[pl] = 9998;
429 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
431 // Sorting vector in ascending order with C function QSORT
432 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
434 for(i=0; i<nentries; i++){
435 zdcSignal->GetEvent(i);
436 entry = zdcSignal->GetArgs();
437 if(entry[0] == rnd[iev]){
438 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
440 Float_t lightQ = entry[7];
441 Float_t lightC = entry[8];
443 if(volume[0] != 3) { // ZN or ZP
444 pm[volume[0]-1][0] += lightC;
445 pm[volume[0]-1][volume[1]] += lightQ;
446 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
447 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
450 if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
451 else pm[2][2] += lightQ; // ZEM 2
452 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
455 else if(entry[0] > rnd[iev]){
460 }while(iev<numEvents);
467 //_____________________________________________________________________________
468 Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
471 // Evaluation of the ADC channel corresponding to the light yield Light
472 Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
473 //printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,vADCch);
478 //_____________________________________________________________________________
479 Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
481 // Returns a pedestal for detector det, PM quad, channel with res.
485 if(fIsCalibration == 0){
486 Int_t index=0, kNch=24;
488 if(Det==1) index = Quad+kNch*Res; // ZNC
489 else if(Det==2) index = (Quad+5)+kNch*Res; // ZPC
490 else if(Det==3) index = (Quad+9)+kNch*Res; // ZEM
491 else if(Det==4) index = (Quad+12)+kNch*Res; // ZNA
492 else if(Det==5) index = (Quad+17)+kNch*Res; // ZPA
494 else index = (Det-1)/3+22+kNch*Res; // Reference PMs
496 Float_t meanPed = fPedData->GetMeanPed(index);
497 Float_t pedWidth = fPedData->GetMeanPedWidth(index);
498 pedValue = gRandom->Gaus(meanPed,pedWidth);
500 /*printf("\t AliZDCDigitizer::Pedestal -> det %d quad %d res %d - Ped[%d] = %d\n",
501 Det, Quad, Res, index,(Int_t) pedValue); // Chiara debugging!
504 // To create calibration object
506 if(Res == 0) pedValue = gRandom->Gaus((35.+10.*gRandom->Rndm()),(0.5+0.2*gRandom->Rndm())); //High gain
507 else pedValue = gRandom->Gaus((250.+100.*gRandom->Rndm()),(3.5+2.*gRandom->Rndm())); //Low gain
510 return (Int_t) pedValue;
513 //_____________________________________________________________________________
514 AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
517 Bool_t deleteManager = kFALSE;
519 AliCDBManager *manager = AliCDBManager::Instance();
520 AliCDBStorage *defstorage = manager->GetDefaultStorage();
522 if(!defstorage || !(defstorage->Contains("ZDC"))){
523 AliWarning("No default storage set or default storage doesn't contain ZDC!");
524 manager->SetDefaultStorage(uri);
525 deleteManager = kTRUE;
528 AliCDBStorage *storage = manager->GetDefaultStorage();
531 AliCDBManager::Instance()->UnsetDefaultStorage();
532 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
538 //_____________________________________________________________________________
539 AliZDCPedestals* AliZDCDigitizer::GetPedData() const
542 // Getting pedestal calibration object for ZDC set
544 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Pedestals");
545 if(!entry) AliFatal("No calibration data loaded!");
547 AliZDCPedestals *calibdata = dynamic_cast<AliZDCPedestals*> (entry->GetObject());
548 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
553 //_____________________________________________________________________________
554 AliZDCEnCalib* AliZDCDigitizer::GetEnCalibData() const
557 // Getting calibration object for ZDC set
559 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/EnergyCalib");
560 if(!entry) AliFatal("No calibration data loaded!");
562 AliZDCEnCalib *calibdata = dynamic_cast<AliZDCEnCalib*> (entry->GetObject());
563 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
568 //_____________________________________________________________________________
569 AliZDCTowerCalib* AliZDCDigitizer::GetTowCalibData() const
572 // Getting calibration object for ZDC set
574 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/TowerCalib");
575 if(!entry) AliFatal("No calibration data loaded!");
577 AliZDCTowerCalib *calibdata = dynamic_cast<AliZDCTowerCalib*> (entry->GetObject());
578 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");