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 "AliGRPObject.h"
40 #include "AliCDBManager.h"
41 #include "AliCDBEntry.h"
42 #include "AliZDCSDigit.h"
43 #include "AliZDCDigit.h"
44 #include "AliZDCFragment.h"
46 #include "AliZDCDigitizer.h"
49 class AliZDCPedestals;
51 ClassImp(AliZDCDigitizer)
54 //____________________________________________________________________________
55 AliZDCDigitizer::AliZDCDigitizer() :
57 fIsSignalInADCGate(kFALSE),
60 fSpectators2Track(kFALSE)
62 // Default constructor
66 //____________________________________________________________________________
67 AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
68 AliDigitizer(manager),
69 fIsCalibration(0), //By default the simulation doesn't create calib. data
70 fIsSignalInADCGate(kFALSE),
72 fPedData(GetPedData()),
73 fSpectators2Track(kFALSE)
75 // Get calibration data
76 if(fIsCalibration!=0) printf("\n\t AliZDCDigitizer -> Creating calibration data (pedestals)\n");
77 for(Int_t i=0; i<6; i++){
78 for(Int_t j=0; j<5; j++)
83 //____________________________________________________________________________
84 AliZDCDigitizer::~AliZDCDigitizer()
91 //____________________________________________________________________________
92 AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
94 fIsCalibration(digitizer.fIsCalibration),
95 fIsSignalInADCGate(digitizer.fIsSignalInADCGate),
96 fFracLostSignal(digitizer.fFracLostSignal),
97 fPedData(digitizer.fPedData),
98 fSpectators2Track(digitizer.fSpectators2Track)
102 for(Int_t i=0; i<6; i++){
103 for(Int_t j=0; j<5; j++){
104 fPMGain[i][j] = digitizer.fPMGain[i][j];
107 for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
112 //____________________________________________________________________________
113 Bool_t AliZDCDigitizer::Init()
115 // Initialize the digitizer
117 AliCDBEntry* entry = AliCDBManager::Instance()->Get("GRP/GRP/Data");
118 AliGRPObject* grpData = 0x0;
120 TMap* m = dynamic_cast<TMap*>(entry->GetObject()); // old GRP entry
123 grpData = new AliGRPObject();
124 grpData->ReadValuesFromMap(m);
127 grpData = dynamic_cast<AliGRPObject*>(entry->GetObject()); // new GRP entry
130 AliCDBManager::Instance()->UnloadFromCache("GRP/GRP/Data");
132 if(!grpData) AliError("No GRP entry found in OCDB!");
134 TString beamType = grpData->GetBeamType();
135 if(beamType==AliGRPObject::GetInvalidString()){
136 AliError("\t UNKNOWN beam type from GRP obj -> PMT gains not set in ZDC digitizer!!!\n");
139 Float_t beamEnergy = grpData->GetBeamEnergy();
140 if(beamEnergy==AliGRPObject::GetInvalidFloat()){
141 AliWarning("GRP/GRP/Data entry: missing value for the beam energy ! Using 0.");
142 AliError("\t UNKNOWN beam type from GRP obj -> PMT gains not set in ZDC digitizer!!!\n");
146 if((beamType.CompareTo("P-P")) == 0){
147 //PTM gains rescaled to beam energy for p-p
149 for(Int_t j = 0; j < 5; j++){
150 fPMGain[0][j] = (661.444/beamEnergy+0.000740671)*10000000;
151 fPMGain[1][j] = (864.350/beamEnergy+0.002344)*10000000;
152 fPMGain[2][j] = (1.32312-0.000101515*beamEnergy)*10000000;
153 fPMGain[3][j] = fPMGain[0][j];
154 fPMGain[4][j] = fPMGain[1][j] ;
156 AliInfo(Form(" PMT gains for p-p @ %1.0f+%1.0f: ZN(%1.0f), ZP(%1.0f), ZEM(%1.0f)\n",
157 beamEnergy, beamEnergy, fPMGain[0][0], fPMGain[1][0], fPMGain[2][0]));
161 // PTM gains for Pb-Pb @ 2.7_2.7 A TeV ***************
162 for(Int_t j = 0; j < 5; j++){
163 fPMGain[0][j] = 50000.;
164 fPMGain[1][j] = 100000.;
165 fPMGain[2][j] = 100000.;
166 fPMGain[3][j] = 50000.;
167 fPMGain[4][j] = 100000.;
168 fPMGain[5][j] = 100000.;
170 AliInfo(Form(" PMT gains for Pb-Pb @ %1.0f+%1.0f: ZN(%1.0f), ZP(%1.0f), ZEM(%1.0f)\n",
171 beamEnergy, beamEnergy, fPMGain[0][0], fPMGain[1][0], fPMGain[2][0]));
175 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
176 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
181 //____________________________________________________________________________
182 void AliZDCDigitizer::Exec(Option_t* /*option*/)
184 // Execute digitization
186 // ------------------------------------------------------------
187 // --- pm[0][...] = light in ZN side C [C, Q1, Q2, Q3, Q4]
188 // --- pm[1][...] = light in ZP side C [C, Q1, Q2, Q3, Q4]
189 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
190 // --- pm[3][...] = light in ZN side A [C, Q1, Q2, Q3, Q4] ->NEW!
191 // --- pm[4][...] = light in ZP side A [C, Q1, Q2, Q3, Q4] ->NEW!
192 // ------------------------------------------------------------
194 for(Int_t iSector1=0; iSector1<5; iSector1++)
195 for(Int_t iSector2=0; iSector2<5; iSector2++){
196 pm[iSector1][iSector2] = 0;
199 // ------------------------------------------------------------
200 // ### Out of time ADC added (22 channels)
201 // --- same codification as for signal PTMs (see above)
202 // ------------------------------------------------------------
204 for(Int_t iSector1=0; iSector1<5; iSector1++)
205 for(Int_t iSector2=0; iSector2<5; iSector2++){
206 pmoot[iSector1][iSector2] = 0;
209 // impact parameter and number of spectators
211 Int_t specNTarg = 0, specPTarg = 0;
212 Int_t specNProj = 0, specPProj = 0;
213 Float_t signalTime0 = 0.;
215 // loop over input streams
216 for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
218 // get run loader and ZDC loader
219 AliRunLoader* runLoader =
220 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
221 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
222 if(!loader) continue;
225 loader->LoadSDigits();
226 TTree* treeS = loader->TreeS();
229 AliZDCSDigit* psdigit = &sdigit;
230 treeS->SetBranchAddress("ZDC", &psdigit);
233 for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
234 treeS->GetEntry(iSDigit);
236 if(!psdigit) continue;
237 if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
238 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
239 sdigit.GetSector(0), sdigit.GetSector(1)));
242 // Checking if signal is inside ADC gate
243 if(iSDigit==0) signalTime0 = sdigit.GetTrackTime();
245 // Assuming a signal lenght of 20 ns, signal is in gate if
246 // signal ENDS in signalTime0+50. -> sdigit.GetTrackTime()+20<=signalTime0+50.
247 if(sdigit.GetTrackTime()<=signalTime0+30.) fIsSignalInADCGate = kTRUE;
248 if(sdigit.GetTrackTime()>signalTime0+30.){
249 fIsSignalInADCGate = kFALSE;
250 // Vedi quaderno per spiegazione approx. usata
251 // nel calcolo della fraz. di segnale perso
252 fFracLostSignal = (sdigit.GetTrackTime()-30)*(sdigit.GetTrackTime()-30)/280.;
256 Float_t sdSignal = sdigit.GetLightPM();
257 if(fIsSignalInADCGate == kFALSE){
258 AliDebug(2,Form("\t Signal time %f -> fraction %f of ZDC signal for det.(%d, %d) out of ADC gate\n",
259 sdigit.GetTrackTime(),fFracLostSignal,sdigit.GetSector(0),sdigit.GetSector(1)));
260 sdSignal = (1-fFracLostSignal)*sdSignal;
263 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
265 /*printf("\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
266 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
267 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]);
272 loader->UnloadSDigits();
274 // get the impact parameter and the number of spectators in case of hijing
275 if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
276 AliHeader* header = runLoader->GetHeader();
277 if(!header) continue;
278 AliGenEventHeader* genHeader = header->GenEventHeader();
279 if(!genHeader) continue;
280 if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
282 if(fSpectators2Track==kTRUE){
283 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
284 specNProj = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
285 specPProj = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
286 specNTarg = ((AliGenHijingEventHeader*) genHeader)->TargSpectatorsn();
287 specPTarg = ((AliGenHijingEventHeader*) genHeader)->TargSpectatorsp();
288 printf("\n\t AliZDCDigitizer: b = %1.2f fm\n"
289 " \t PROJ.: #spectator n %d, #spectator p %d\n"
290 " \t TARG.: #spectator n %d, #spectator p %d\n\n",
291 impPar, specNProj, specPProj, specNTarg, specPTarg);
296 // Applying fragmentation algorithm and adding spectator signal
297 if(fSpectators2Track==kTRUE && impPar) {
298 Int_t freeSpecNProj, freeSpecPProj;
299 Fragmentation(impPar, specNProj, specPProj, freeSpecNProj, freeSpecPProj);
300 Int_t freeSpecNTarg, freeSpecPTarg;
301 Fragmentation(impPar, specNTarg, specPTarg, freeSpecNTarg, freeSpecPTarg);
302 SpectatorSignal(1, freeSpecNProj, pm);
303 //printf(" AliZDCDigitizer -> Signal for %d PROJ free spectator n",freeSpecNProj);
304 SpectatorSignal(2, freeSpecPProj, pm);
305 //printf(" and %d free spectator p added\n",freeSpecPProj);
306 SpectatorSignal(3, freeSpecNTarg, pm);
307 //printf(" AliZDCDigitizer -> Signal for %d TARG free spectator n",freeSpecNTarg);
308 SpectatorSignal(4, freeSpecPTarg, pm);
309 //printf("and %d free spectator p added\n",freeSpecPTarg);
313 // get the output run loader and loader
314 AliRunLoader* runLoader =
315 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
316 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
318 AliError("no ZDC loader found");
322 // create the output tree
323 const char* mode = "update";
324 if(runLoader->GetEventNumber() == 0) mode = "recreate";
325 loader->LoadDigits(mode);
326 loader->MakeTree("D");
327 TTree* treeD = loader->TreeD();
329 AliZDCDigit* pdigit = &digit;
330 const Int_t kBufferSize = 4000;
331 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
335 Int_t digi[2], digioot[2];
336 for(sector[0]=1; sector[0]<6; sector[0]++){
337 for(sector[1]=0; sector[1]<5; sector[1]++){
338 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
339 for(Int_t res=0; res<2; res++){
340 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
341 + Pedestal(sector[0], sector[1], res);
343 new(pdigit) AliZDCDigit(sector, digi);
347 //printf("\t DIGIT added -> det %d quad %d - digi[0,1] = [%d, %d]\n",
348 // sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
351 } // Loop over detector
352 // Adding in-time digits for 2 reference PTM signals (after signal ch.)
353 // (for the moment the ref. signal is completely invented assuming a PMgain of 5*10^4!)
357 // Reference signal are set to 100 (high gain chain) and 800 (low gain chain)
358 if(fIsCalibration==0) {sigRef[0]=100; sigRef[1]=800;}
359 else {sigRef[0]=0; sigRef[1]=0;} // calibration -> simulation of pedestal values
361 for(Int_t iref=0; iref<2; iref++){
362 sectorRef[0] = 3*iref+1;
363 for(Int_t res=0; res<2; res++){
364 sigRef[res] += Pedestal(sectorRef[0], sectorRef[1], res);
366 new(pdigit) AliZDCDigit(sectorRef, sigRef);
370 //printf("\t RefDigit added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
371 // sectorRef[0], sectorRef[1], sigRef[0], sigRef[1]); // Chiara debugging!
374 // --- Adding digits for out-of-time channels after signal digits
375 for(sector[0]=1; sector[0]<6; sector[0]++){
376 for(sector[1]=0; sector[1]<5; sector[1]++){
377 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
378 for(Int_t res=0; res<2; res++){
379 digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
381 new(pdigit) AliZDCDigit(sector, digioot);
385 //printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
386 // sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
389 // Adding out-of-time digits for 2 reference PTM signals (after out-of-time ch.)
391 for(Int_t iref=0; iref<2; iref++){
392 sectorRef[0] = 3*iref+1;
393 for(Int_t res=0; res<2; res++){
394 sigRefoot[res] = Pedestal(sectorRef[0], sectorRef[1], res);
396 new(pdigit) AliZDCDigit(sectorRef, sigRefoot);
399 //printf("\t RefDigitoot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
400 // sectorRef[0], sectorRef[1], sigRefoot[0], sigRefoot[1]); // Chiara debugging!
403 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
405 // write the output tree
406 loader->WriteDigits("OVERWRITE");
407 loader->UnloadDigits();
411 //_____________________________________________________________________________
412 void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
413 Int_t &freeSpecN, Int_t &freeSpecP) const
415 // simulate fragmentation of spectators
417 AliZDCFragment frag(impPar);
419 // Fragments generation
421 Int_t nAlpha = frag.GetNalpha();
424 Int_t ztot = frag.GetZtot();
425 Int_t ntot = frag.GetNtot();
426 frag.AttachNeutrons();
427 freeSpecN = specN-ntot-2*nAlpha;
428 freeSpecP = specP-ztot-2*nAlpha;
429 // Removing deuterons
430 Int_t ndeu = (Int_t) (freeSpecN*frag.DeuteronNumber());
433 if(freeSpecN<0) freeSpecN=0;
434 if(freeSpecP<0) freeSpecP=0;
435 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
438 //_____________________________________________________________________________
439 void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
440 Float_t pm[5][5]) const
442 // add signal of the spectators
445 if(SpecType == 1) { // --- Signal for projectile spectator neutrons
446 hfn = "$ALICE_ROOT/ZDC/ZNCSignal.root";
448 else if(SpecType == 2) { // --- Signal for projectile spectator protons
449 hfn = "$ALICE_ROOT/ZDC/ZPCSignal.root";
451 else if(SpecType == 3) { // --- Signal for target spectator neutrons
452 hfn = "$ALICE_ROOT/ZDC/ZNASignal.root";
454 else if(SpecType == 4) { // --- Signal for target spectator protons
455 hfn = "$ALICE_ROOT/ZDC/ZPASignal.root";
458 TFile* file = TFile::Open(hfn);
459 if(!file || !file->IsOpen()) {
460 AliError((Form(" Opening file %s failed\n",hfn.Data())));
464 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
465 Int_t nentries = (Int_t) zdcSignal->GetEntries();
468 Int_t pl, i, k, iev=0, rnd[125], volume[2];
469 for(pl=0;pl<125;pl++) rnd[pl] = 0;
470 if(numEvents > 125) {
471 AliDebug(2,Form("numEvents (%d) is larger than 125", numEvents));
474 for(pl=0;pl<numEvents;pl++){
475 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
476 if(rnd[pl] >= 9999) rnd[pl] = 9998;
477 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
479 // Sorting vector in ascending order with C function QSORT
480 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
482 for(i=0; i<nentries; i++){
483 zdcSignal->GetEvent(i);
484 entry = zdcSignal->GetArgs();
485 if(entry[0] == rnd[iev]){
486 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
488 Float_t lightQ = entry[7];
489 Float_t lightC = entry[8];
491 if(volume[0] != 3) { // ZN or ZP
492 pm[volume[0]-1][0] += lightC;
493 pm[volume[0]-1][volume[1]] += lightQ;
494 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
495 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
498 if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
499 else pm[2][2] += lightQ; // ZEM 2
500 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
503 else if(entry[0] > rnd[iev]){
508 }while(iev<numEvents);
515 //_____________________________________________________________________________
516 Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
519 // Evaluation of the ADC channel corresponding to the light yield Light
520 Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
522 //printf("\t Phe2ADCch -> det %d quad %d - PMGain[%d][%d] %1.0f phe %1.2f ADC %d\n",
523 // Det,Quad,Det-1,Quad,fPMGain[Det-1][Quad],Light,vADCch);
528 //_____________________________________________________________________________
529 Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
531 // Returns a pedestal for detector det, PM quad, channel with res.
535 if(fIsCalibration == 0){
536 Int_t index=0, kNch=24;
538 if(Det==1) index = Quad+kNch*Res; // ZNC
539 else if(Det==2) index = (Quad+5)+kNch*Res; // ZPC
540 else if(Det==3) index = (Quad+9)+kNch*Res; // ZEM
541 else if(Det==4) index = (Quad+12)+kNch*Res; // ZNA
542 else if(Det==5) index = (Quad+17)+kNch*Res; // ZPA
544 else index = (Det-1)/3+22+kNch*Res; // Reference PMs
546 Float_t meanPed = fPedData->GetMeanPed(index);
547 Float_t pedWidth = fPedData->GetMeanPedWidth(index);
548 pedValue = gRandom->Gaus(meanPed,pedWidth);
550 /*printf("\t AliZDCDigitizer::Pedestal -> det %d quad %d res %d - Ped[%d] = %d\n",
551 Det, Quad, Res, index,(Int_t) pedValue); // Chiara debugging!
554 // To create calibration object
556 if(Res == 0) pedValue = gRandom->Gaus((35.+10.*gRandom->Rndm()),(0.5+0.2*gRandom->Rndm())); //High gain
557 else pedValue = gRandom->Gaus((250.+100.*gRandom->Rndm()),(3.5+2.*gRandom->Rndm())); //Low gain
560 return (Int_t) pedValue;
563 //_____________________________________________________________________________
564 AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
567 Bool_t deleteManager = kFALSE;
569 AliCDBManager *manager = AliCDBManager::Instance();
570 AliCDBStorage *defstorage = manager->GetDefaultStorage();
572 if(!defstorage || !(defstorage->Contains("ZDC"))){
573 AliWarning("No default storage set or default storage doesn't contain ZDC!");
574 manager->SetDefaultStorage(uri);
575 deleteManager = kTRUE;
578 AliCDBStorage *storage = manager->GetDefaultStorage();
581 AliCDBManager::Instance()->UnsetDefaultStorage();
582 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
588 //_____________________________________________________________________________
589 AliZDCPedestals* AliZDCDigitizer::GetPedData() const
592 // Getting pedestal calibration object for ZDC set
594 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Pedestals");
595 if(!entry) AliFatal("No calibration data loaded!");
597 AliZDCPedestals *calibdata = dynamic_cast<AliZDCPedestals*> (entry->GetObject());
598 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");