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;
51 ClassImp(AliZDCDigitizer)
54 //____________________________________________________________________________
55 AliZDCDigitizer::AliZDCDigitizer() :
57 fIsSignalInADCGate(kFALSE),
61 fSpectators2Track(kFALSE)
63 // Default constructor
67 //____________________________________________________________________________
68 AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
69 AliDigitizer(manager),
70 fIsCalibration(0), //By default the simulation doesn't create calib. data
71 fIsSignalInADCGate(kFALSE),
73 fPedData(GetPedData()),
74 fCalibData(GetCalibData()),
75 fSpectators2Track(kFALSE)
77 // Get calibration data
78 if(fIsCalibration!=0) printf("\n\t AliZDCDigitizer -> Creating calibration data (pedestals)\n");
82 //____________________________________________________________________________
83 AliZDCDigitizer::~AliZDCDigitizer()
90 //____________________________________________________________________________
91 AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
93 fIsCalibration(digitizer.fIsCalibration),
94 fIsSignalInADCGate(digitizer.fIsSignalInADCGate),
95 fFracLostSignal(digitizer.fFracLostSignal),
96 fPedData(digitizer.fPedData),
97 fCalibData(digitizer.fCalibData),
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];
111 //____________________________________________________________________________
112 Bool_t AliZDCDigitizer::Init()
114 // Initialize the digitizer
115 // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
116 for(Int_t j = 0; j < 5; j++){
117 fPMGain[0][j] = 50000.;
118 fPMGain[1][j] = 100000.;
119 fPMGain[2][j] = 100000.;
120 fPMGain[3][j] = 50000.;
121 fPMGain[4][j] = 100000.;
122 fPMGain[5][j] = 100000.;
125 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
126 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
131 //____________________________________________________________________________
132 void AliZDCDigitizer::Exec(Option_t* /*option*/)
134 // Execute digitization
136 // ------------------------------------------------------------
137 // !!! 2nd ZDC set added
138 // *** 1st 3 arrays are digits from REAL (simulated) hits
139 // *** last 2 are copied from simulated digits
140 // --- pm[0][...] = light in ZN side C [C, Q1, Q2, Q3, Q4]
141 // --- pm[1][...] = light in ZP side C [C, Q1, Q2, Q3, Q4]
142 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
143 // --- pm[3][...] = light in ZN side A [C, Q1, Q2, Q3, Q4] ->NEW!
144 // --- pm[4][...] = light in ZP side A [C, Q1, Q2, Q3, Q4] ->NEW!
145 // ------------------------------------------------------------
147 for(Int_t iSector1=0; iSector1<5; iSector1++)
148 for(Int_t iSector2=0; iSector2<5; iSector2++){
149 pm[iSector1][iSector2] = 0;
152 // ------------------------------------------------------------
153 // ### Out of time ADC added (22 channels)
154 // --- same codification as for signal PTMs (see above)
155 // ------------------------------------------------------------
157 for(Int_t iSector1=0; iSector1<5; iSector1++)
158 for(Int_t iSector2=0; iSector2<5; iSector2++){
159 pmoot[iSector1][iSector2] = 0;
162 // impact parameter and number of spectators
164 Int_t specNTarg = 0, specPTarg = 0;
165 Int_t specNProj = 0, specPProj = 0;
166 Float_t signalTime0 = 0.;
168 // loop over input streams
169 for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
171 // get run loader and ZDC loader
172 AliRunLoader* runLoader =
173 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
174 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
175 if(!loader) continue;
178 loader->LoadSDigits();
179 TTree* treeS = loader->TreeS();
182 AliZDCSDigit* psdigit = &sdigit;
183 treeS->SetBranchAddress("ZDC", &psdigit);
186 for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
187 treeS->GetEntry(iSDigit);
189 if(!psdigit) continue;
190 if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
191 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
192 sdigit.GetSector(0), sdigit.GetSector(1)));
195 // Checking if signal is inside ADC gate
196 if(iSDigit==0) signalTime0 = sdigit.GetTrackTime();
198 // Assuming a signal lenght of 20 ns, signal is in gate if
199 // signal ENDS in signalTime0+50. -> sdigit.GetTrackTime()+20<=signalTime0+50.
200 if(sdigit.GetTrackTime()<=signalTime0+30.) fIsSignalInADCGate = kTRUE;
201 if(sdigit.GetTrackTime()>signalTime0+30.){
202 fIsSignalInADCGate = kFALSE;
203 // Vedi quaderno per spiegazione approx. usata
204 // nel calcolo della fraz. di segnale perso
205 fFracLostSignal = (sdigit.GetTrackTime()-30)*(sdigit.GetTrackTime()-30)/280.;
208 Float_t sdSignal = sdigit.GetLightPM();
209 if(fIsSignalInADCGate == kFALSE){
210 AliWarning(Form("\t Fraction %f of ZDC signal 4 det.(%d, %d) out of ADC gate\n",
211 fFracLostSignal,sdigit.GetSector(0),sdigit.GetSector(1)));
212 sdSignal = (1-fFracLostSignal)*sdSignal;
215 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
216 /*printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
217 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
218 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]); // Chiara debugging!
223 loader->UnloadSDigits();
225 // get the impact parameter and the number of spectators in case of hijing
226 if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
227 AliHeader* header = runLoader->GetHeader();
228 if(!header) continue;
229 AliGenEventHeader* genHeader = header->GenEventHeader();
230 if(!genHeader) continue;
231 if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
233 if(fSpectators2Track==kTRUE){
234 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
235 specNProj = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
236 specPProj = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
237 specNTarg = ((AliGenHijingEventHeader*) genHeader)->TargSpectatorsn();
238 specPTarg = ((AliGenHijingEventHeader*) genHeader)->TargSpectatorsp();
239 printf("\n\t AliZDCDigitizer: b = %1.2f fm\n"
240 " \t PROJ.: #spectator n %d, #spectator p %d\n"
241 " \t TARG.: #spectator n %d, #spectator p %d\n\n",
242 impPar, specNProj, specPProj, specNTarg, specPTarg);
247 // Applying fragmentation algorithm and adding spectator signal
248 if(fSpectators2Track==kTRUE && impPar) {
249 Int_t freeSpecNProj, freeSpecPProj;
250 Fragmentation(impPar, specNProj, specPProj, freeSpecNProj, freeSpecPProj);
251 Int_t freeSpecNTarg, freeSpecPTarg;
252 Fragmentation(impPar, specNTarg, specPTarg, freeSpecNTarg, freeSpecPTarg);
253 SpectatorSignal(1, freeSpecNProj, pm);
254 //printf(" AliZDCDigitizer -> Signal for %d PROJ free spectator n",freeSpecNProj);
255 SpectatorSignal(2, freeSpecPProj, pm);
256 //printf(" and %d free spectator p added\n",freeSpecPProj);
257 SpectatorSignal(3, freeSpecNTarg, pm);
258 //printf(" AliZDCDigitizer -> Signal for %d TARG free spectator n",freeSpecNTarg);
259 SpectatorSignal(4, freeSpecPTarg, pm);
260 //printf("and %d free spectator p added\n",freeSpecPTarg);
264 // get the output run loader and loader
265 AliRunLoader* runLoader =
266 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
267 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
269 AliError("no ZDC loader found");
273 // create the output tree
274 const char* mode = "update";
275 if(runLoader->GetEventNumber() == 0) mode = "recreate";
276 loader->LoadDigits(mode);
277 loader->MakeTree("D");
278 TTree* treeD = loader->TreeD();
280 AliZDCDigit* pdigit = &digit;
281 const Int_t kBufferSize = 4000;
282 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
286 Int_t digi[2], digioot[2];
287 for(sector[0]=1; sector[0]<6; sector[0]++){
288 for(sector[1]=0; sector[1]<5; sector[1]++){
289 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
290 for(Int_t res=0; res<2; res++){
291 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
292 + Pedestal(sector[0], sector[1], res);
294 /*printf("\t DIGIT added -> det %d quad %d - digi[0,1] = [%d, %d]\n",
295 sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
298 new(pdigit) AliZDCDigit(sector, digi);
301 } // Loop over detector
302 // Adding in-time digits for 2 reference PTM signals (after signal ch.)
303 // (for the moment the ref. signal is completely invented assuming a PMgain of 5*10^4!)
307 // Reference signal are set to 100 (high gain chain) and 800 (low gain chain)
308 if(fIsCalibration==0) {sigRef[0]=100; sigRef[1]=800;}
309 else {sigRef[0]=0; sigRef[1]=0;} // calibration -> simulation of pedestal values
311 for(Int_t iref=0; iref<2; iref++){
312 sectorRef[0] = 3*iref+1;
313 for(Int_t res=0; res<2; res++){
314 sigRef[res] += Pedestal(sectorRef[0], sectorRef[1], res);
316 /*printf("\t RefDigit added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
317 sectorRef[0], sectorRef[1], sigRef[0], sigRef[1]); // Chiara debugging!
319 new(pdigit) AliZDCDigit(sectorRef, sigRef);
323 // --- Adding digits for out-of-time channels after signal digits
324 for(sector[0]=1; sector[0]<6; sector[0]++){
325 for(sector[1]=0; sector[1]<5; sector[1]++){
326 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
327 for(Int_t res=0; res<2; res++){
328 digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
330 /*printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
331 sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
334 new(pdigit) AliZDCDigit(sector, digioot);
338 // Adding out-of-time digits for 2 reference PTM signals (after out-of-time ch.)
340 for(Int_t iref=0; iref<2; iref++){
341 sectorRef[0] = 3*iref+1;
342 for(Int_t res=0; res<2; res++){
343 sigRefoot[res] = Pedestal(sectorRef[0], sectorRef[1], res);
345 /*printf("\t RefDigitoot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
346 sectorRef[0], sectorRef[1], sigRefoot[0], sigRefoot[1]); // Chiara debugging!
348 new(pdigit) AliZDCDigit(sectorRef, sigRefoot);
351 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
353 // write the output tree
354 loader->WriteDigits("OVERWRITE");
355 loader->UnloadDigits();
359 //_____________________________________________________________________________
360 void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
361 Int_t &freeSpecN, Int_t &freeSpecP) const
363 // simulate fragmentation of spectators
365 AliZDCFragment frag(impPar);
367 // Fragments generation
369 Int_t nAlpha = frag.GetNalpha();
372 Int_t ztot = frag.GetZtot();
373 Int_t ntot = frag.GetNtot();
374 frag.AttachNeutrons();
375 freeSpecN = specN-ntot-2*nAlpha;
376 freeSpecP = specP-ztot-2*nAlpha;
377 // Removing deuterons
378 Int_t ndeu = (Int_t) (freeSpecN*frag.DeuteronNumber());
381 if(freeSpecN<0) freeSpecN=0;
382 if(freeSpecP<0) freeSpecP=0;
383 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
386 //_____________________________________________________________________________
387 void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
388 Float_t pm[5][5]) const
390 // add signal of the spectators
393 if(SpecType == 1) { // --- Signal for projectile spectator neutrons
394 hfn = "$ALICE_ROOT/ZDC/ZNCSignal.root";
396 else if(SpecType == 2) { // --- Signal for projectile spectator protons
397 hfn = "$ALICE_ROOT/ZDC/ZPCSignal.root";
399 else if(SpecType == 3) { // --- Signal for target spectator neutrons
400 hfn = "$ALICE_ROOT/ZDC/ZNASignal.root";
402 else if(SpecType == 4) { // --- Signal for target spectator protons
403 hfn = "$ALICE_ROOT/ZDC/ZPASignal.root";
406 TFile* file = TFile::Open(hfn);
407 if(!file || !file->IsOpen()) {
408 AliError((Form(" Opening file %s failed\n",hfn.Data())));
412 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
413 Int_t nentries = (Int_t) zdcSignal->GetEntries();
416 Int_t pl, i, k, iev=0, rnd[125], volume[2];
417 for(pl=0;pl<125;pl++) rnd[pl] = 0;
418 if(numEvents > 125) {
419 AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
422 for(pl=0;pl<numEvents;pl++){
423 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
424 if(rnd[pl] >= 9999) rnd[pl] = 9998;
425 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
427 // Sorting vector in ascending order with C function QSORT
428 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
430 for(i=0; i<nentries; i++){
431 zdcSignal->GetEvent(i);
432 entry = zdcSignal->GetArgs();
433 if(entry[0] == rnd[iev]){
434 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
436 Float_t lightQ = entry[7];
437 Float_t lightC = entry[8];
439 if(volume[0] != 3) { // ZN or ZP
440 pm[volume[0]-1][0] += lightC;
441 pm[volume[0]-1][volume[1]] += lightQ;
442 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
443 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
446 if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
447 else pm[2][2] += lightQ; // ZEM 2
448 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
451 else if(entry[0] > rnd[iev]){
456 }while(iev<numEvents);
463 //_____________________________________________________________________________
464 Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
467 // Evaluation of the ADC channel corresponding to the light yield Light
468 Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
469 //printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,vADCch);
474 //_____________________________________________________________________________
475 Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
477 // Returns a pedestal for detector det, PM quad, channel with res.
481 if(fIsCalibration == 0){
482 Int_t index=0, kNch=24;
484 if(Det==1) index = Quad+kNch*Res; // ZNC
485 else if(Det==2) index = (Quad+5)+kNch*Res; // ZPC
486 else if(Det==3) index = (Quad+9)+kNch*Res; // ZEM
487 else if(Det==4) index = (Quad+12)+kNch*Res; // ZNA
488 else if(Det==5) index = (Quad+17)+kNch*Res; // ZPA
490 else index = (Det-1)/3+22+kNch*Res; // Reference PMs
492 Float_t meanPed = fPedData->GetMeanPed(index);
493 Float_t pedWidth = fPedData->GetMeanPedWidth(index);
494 pedValue = gRandom->Gaus(meanPed,pedWidth);
496 /*printf("\t AliZDCDigitizer::Pedestal -> det %d quad %d res %d - Ped[%d] = %d\n",
497 Det, Quad, Res, index,(Int_t) pedValue); // Chiara debugging!
500 // To create calibration object
502 if(Res == 0) pedValue = gRandom->Gaus((35.+10.*gRandom->Rndm()),(0.5+0.2*gRandom->Rndm())); //High gain
503 else pedValue = gRandom->Gaus((250.+100.*gRandom->Rndm()),(3.5+2.*gRandom->Rndm())); //Low gain
506 return (Int_t) pedValue;
509 //_____________________________________________________________________________
510 AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
513 Bool_t deleteManager = kFALSE;
515 AliCDBManager *manager = AliCDBManager::Instance();
516 AliCDBStorage *defstorage = manager->GetDefaultStorage();
518 if(!defstorage || !(defstorage->Contains("ZDC"))){
519 AliWarning("No default storage set or default storage doesn't contain ZDC!");
520 manager->SetDefaultStorage(uri);
521 deleteManager = kTRUE;
524 AliCDBStorage *storage = manager->GetDefaultStorage();
527 AliCDBManager::Instance()->UnsetDefaultStorage();
528 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
534 //_____________________________________________________________________________
535 AliZDCPedestals* AliZDCDigitizer::GetPedData() const
538 // Getting pedestal calibration object for ZDC set
540 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Pedestals");
541 if(!entry) AliFatal("No calibration data loaded!");
543 AliZDCPedestals *calibdata = dynamic_cast<AliZDCPedestals*> (entry->GetObject());
544 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
549 //_____________________________________________________________________________
550 AliZDCCalib* AliZDCDigitizer::GetCalibData() const
553 // Getting calibration object for ZDC set
555 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/EMDCalib");
556 if(!entry) AliFatal("No calibration data loaded!");
558 AliZDCCalib *calibdata = dynamic_cast<AliZDCCalib*> (entry->GetObject());
559 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");