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"
44 #include "AliZDCDigitizer.h"
47 class AliZDCPedestals;
50 ClassImp(AliZDCDigitizer)
53 //____________________________________________________________________________
54 AliZDCDigitizer::AliZDCDigitizer() :
59 // Default constructor
63 //____________________________________________________________________________
64 AliZDCDigitizer::AliZDCDigitizer(AliRunDigitizer* manager):
65 AliDigitizer(manager),
66 fIsCalibration(0), //By default the simulation doesn't create calib. data
67 fPedData(GetPedData()),
68 fCalibData(GetCalibData())
70 // Get calibration data
71 if(fIsCalibration!=0) printf("\n\t AliZDCDigitizer -> Creating calibration data (pedestals)\n");
75 //____________________________________________________________________________
76 AliZDCDigitizer::~AliZDCDigitizer()
83 //____________________________________________________________________________
84 AliZDCDigitizer::AliZDCDigitizer(const AliZDCDigitizer &digitizer):
86 fIsCalibration(digitizer.fIsCalibration),
87 fPedData(digitizer.fPedData),
88 fCalibData(digitizer.fCalibData)
92 for(Int_t i=0; i<6; i++){
93 for(Int_t j=0; j<5; j++){
94 fPMGain[i][j] = digitizer.fPMGain[i][j];
97 for(Int_t i=0; i<2; i++) fADCRes[i] = digitizer.fADCRes[i];
101 //____________________________________________________________________________
102 Bool_t AliZDCDigitizer::Init()
104 // Initialize the digitizer
105 // NB -> PM gain vs. HV & ADC resolutions will move to DCDB ***************
106 for(Int_t j = 0; j < 5; j++){
107 fPMGain[0][j] = 50000.;
108 fPMGain[1][j] = 100000.;
109 fPMGain[2][j] = 100000.;
110 fPMGain[3][j] = 50000.;
111 fPMGain[4][j] = 100000.;
112 fPMGain[5][j] = 100000.;
115 fADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
116 fADCRes[1] = 0.0000064; // ADC Resolution low gain: 25 fC/adcCh
121 //____________________________________________________________________________
122 void AliZDCDigitizer::Exec(Option_t* /*option*/)
124 // Execute digitization
126 // ------------------------------------------------------------
127 // !!! 2nd ZDC set added
128 // *** 1st 3 arrays are digits from REAL (simulated) hits
129 // *** last 2 are copied from simulated digits
130 // --- pm[0][...] = light in ZN right [C, Q1, Q2, Q3, Q4]
131 // --- pm[1][...] = light in ZP right [C, Q1, Q2, Q3, Q4]
132 // --- pm[2][...] = light in ZEM [x, 1, 2, x, x]
133 // --- pm[3][...] = light in ZN left [C, Q1, Q2, Q3, Q4] ->NEW!
134 // --- pm[4][...] = light in ZP left [C, Q1, Q2, Q3, Q4] ->NEW!
135 // ------------------------------------------------------------
137 for(Int_t iSector1=0; iSector1<5; iSector1++)
138 for(Int_t iSector2=0; iSector2<5; iSector2++){
139 pm[iSector1][iSector2] = 0;
142 // ------------------------------------------------------------
143 // ### Out of time ADC added (22 channels)
144 // --- same codification as for signal PTMs (see above)
145 // ------------------------------------------------------------
147 for(Int_t iSector1=0; iSector1<5; iSector1++)
148 for(Int_t iSector2=0; iSector2<5; iSector2++){
149 pmoot[iSector1][iSector2] = 0;
152 // impact parameter and number of spectators
157 // loop over input streams
158 for(Int_t iInput = 0; iInput<fManager->GetNinputs(); iInput++){
160 // get run loader and ZDC loader
161 AliRunLoader* runLoader =
162 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
163 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
164 if(!loader) continue;
167 loader->LoadSDigits();
168 TTree* treeS = loader->TreeS();
171 AliZDCSDigit* psdigit = &sdigit;
172 treeS->SetBranchAddress("ZDC", &psdigit);
175 for(Int_t iSDigit=0; iSDigit<treeS->GetEntries(); iSDigit++){
176 treeS->GetEntry(iSDigit);
178 if(!psdigit) continue;
179 if((sdigit.GetSector(1) < 0) || (sdigit.GetSector(1) > 4)){
180 AliError(Form("\nsector[0] = %d, sector[1] = %d\n",
181 sdigit.GetSector(0), sdigit.GetSector(1)));
185 pm[(sdigit.GetSector(0))-1][sdigit.GetSector(1)] += sdigit.GetLightPM();
187 printf("\n\t Detector %d, Tower %d -> pm[%d][%d] = %.0f \n",
188 sdigit.GetSector(0), sdigit.GetSector(1),sdigit.GetSector(0)-1,
189 sdigit.GetSector(1), pm[sdigit.GetSector(0)-1][sdigit.GetSector(1)]);
193 loader->UnloadSDigits();
195 // get the impact parameter and the number of spectators in case of hijing
196 if(!runLoader->GetAliRun()) runLoader->LoadgAlice();
197 AliHeader* header = runLoader->GetHeader();
198 if(!header) continue;
199 AliGenEventHeader* genHeader = header->GenEventHeader();
200 if(!genHeader) continue;
201 if(!genHeader->InheritsFrom(AliGenHijingEventHeader::Class())) continue;
202 impPar = ((AliGenHijingEventHeader*) genHeader)->ImpactParameter();
204 specN = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsn();
205 specP = ((AliGenHijingEventHeader*) genHeader)->ProjSpectatorsp();
206 AliDebug(2, Form("\n AliZDCDigitizer -> b = %f fm, Nspecn = %d, Nspecp = %d\n",
207 impPar, specN, specP));
208 //printf("\n\t AliZDCDigitizer -> b = %f fm, # generated spectator n = %d,"
209 //" # generated spectator p = %d\n", impPar, specN, specP);
214 Int_t freeSpecN, freeSpecP;
215 Fragmentation(impPar, specN, specP, freeSpecN, freeSpecP);
216 printf("\n\t AliZDCDigitizer -> Adding signal for %d free spectator n\n",freeSpecN);
217 SpectatorSignal(1, freeSpecN, pm);
218 printf("\t AliZDCDigitizer -> Adding signal for %d free spectator p\n\n",freeSpecP);
219 SpectatorSignal(2, freeSpecP, pm);
223 // get the output run loader and loader
224 AliRunLoader* runLoader =
225 AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
226 AliLoader* loader = runLoader->GetLoader("ZDCLoader");
228 AliError("no ZDC loader found");
232 // create the output tree
233 const char* mode = "update";
234 if(runLoader->GetEventNumber() == 0) mode = "recreate";
235 loader->LoadDigits(mode);
236 loader->MakeTree("D");
237 TTree* treeD = loader->TreeD();
239 AliZDCDigit* pdigit = &digit;
240 const Int_t kBufferSize = 4000;
241 treeD->Branch("ZDC", "AliZDCDigit", &pdigit, kBufferSize);
245 Int_t digi[2], digioot[2];
246 for(sector[0]=1; sector[0]<6; sector[0]++){
247 for(sector[1]=0; sector[1]<5; sector[1]++){
248 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
249 for(Int_t res=0; res<2; res++){
250 digi[res] = Phe2ADCch(sector[0], sector[1], pm[sector[0]-1][sector[1]], res)
251 + Pedestal(sector[0], sector[1], res);
253 //printf("\t DIGIT added -> det %d quad %d - digi[0,1] = [%d, %d]\n",
254 // sector[0], sector[1], digi[0], digi[1]); // Chiara debugging!
257 new(pdigit) AliZDCDigit(sector, digi);
260 } // Loop over detector
261 // Adding in-time digits for 2 reference PTM signals (after signal ch.)
262 // (for the moment the ref. signal is completely invented assuming a PMgain of 5*10^4!)
266 // Reference signal are set to 100 (high gain chain) and 800 (low gain chain)
267 if(fIsCalibration==0) {sigRef[0]=100; sigRef[1]=800;}
268 else {sigRef[0]=0; sigRef[1]=0;} // calibration -> simulation of pedestal values
270 for(Int_t iref=0; iref<2; iref++){
271 sectorRef[0] = 3*iref+1;
272 for(Int_t res=0; res<2; res++){
273 sigRef[res] += Pedestal(sectorRef[0], sectorRef[1], res);
275 //printf("\t RefDigit added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
276 // sectorRef[0], sectorRef[1], sigRef[0], sigRef[1]); // Chiara debugging!
278 new(pdigit) AliZDCDigit(sectorRef, sigRef);
282 // --- Adding digits for out-of-time channels after signal digits
283 for(sector[0]=1; sector[0]<6; sector[0]++){
284 for(sector[1]=0; sector[1]<5; sector[1]++){
285 if((sector[0]==3) && ((sector[1]<1) || (sector[1]>2))) continue;
286 for(Int_t res=0; res<2; res++){
287 digioot[res] = Pedestal(sector[0], sector[1], res); // out-of-time ADCs
289 //printf("\t DIGIToot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
290 // sector[0], sector[1], digioot[0], digioot[1]); // Chiara debugging!
293 new(pdigit) AliZDCDigit(sector, digioot);
297 // Adding out-of-time digits for 2 reference PTM signals (after out-of-time ch.)
299 for(Int_t iref=0; iref<2; iref++){
300 sectorRef[0] = 3*iref+1;
301 for(Int_t res=0; res<2; res++){
302 sigRefoot[res] = Pedestal(sectorRef[0], sectorRef[1], res);
304 //printf("\t RefDigitoot added -> det = %d, quad = %d - digi[0,1] = [%d, %d]\n",
305 // sectorRef[0], sectorRef[1], sigRefoot[0], sigRefoot[1]); // Chiara debugging!
307 new(pdigit) AliZDCDigit(sectorRef, sigRefoot);
310 //printf("\t AliZDCDigitizer -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());
312 // write the output tree
313 loader->WriteDigits("OVERWRITE");
314 loader->UnloadDigits();
318 //_____________________________________________________________________________
319 void AliZDCDigitizer::Fragmentation(Float_t impPar, Int_t specN, Int_t specP,
320 Int_t &freeSpecN, Int_t &freeSpecP) const
322 // simulate fragmentation of spectators
324 AliZDCFragment frag(impPar);
326 // Fragments generation
328 Int_t nAlpha = frag.GetNalpha();
331 Int_t ztot = frag.GetZtot();
332 Int_t ntot = frag.GetNtot();
333 frag.AttachNeutrons();
334 freeSpecN = specN-ntot-2*nAlpha;
335 freeSpecP = specP-ztot-2*nAlpha;
336 // Removing deuterons
337 Int_t ndeu = (Int_t) (freeSpecN*frag.DeuteronNumber());
340 if(freeSpecN<0) freeSpecN=0;
341 if(freeSpecP<0) freeSpecP=0;
342 AliDebug(2, Form("FreeSpn = %d, FreeSpp = %d", freeSpecN, freeSpecP));
345 //_____________________________________________________________________________
346 void AliZDCDigitizer::SpectatorSignal(Int_t SpecType, Int_t numEvents,
347 Float_t pm[3][5]) const
349 // add signal of the spectators
352 if(SpecType == 1) { // --- Signal for spectator neutrons
353 file = TFile::Open("$ALICE_ROOT/ZDC/ZNsignalntu.root");
354 } else if(SpecType == 2) { // --- Signal for spectator protons
355 file = TFile::Open("$ALICE_ROOT/ZDC/ZPsignalntu.root");
357 if(!file || !file->IsOpen()) {
358 AliError("Opening of file failed");
362 TNtuple* zdcSignal = (TNtuple*) file->Get("ZDCSignal");
363 Int_t nentries = (Int_t) zdcSignal->GetEntries();
365 Float_t *entry, hitsSpec[7];
366 Int_t pl, i, j, k, iev=0, rnd[125], volume[2];
367 for(pl=0;pl<125;pl++) rnd[pl] = 0;
368 if(numEvents > 125) {
369 AliWarning(Form("numEvents (%d) is larger than 125", numEvents));
372 for(pl=0;pl<numEvents;pl++){
373 rnd[pl] = (Int_t) (9999*gRandom->Rndm());
374 if(rnd[pl] >= 9999) rnd[pl] = 9998;
375 //printf(" rnd[%d] = %d\n",pl,rnd[pl]);
377 // Sorting vector in ascending order with C function QSORT
378 qsort((void*)rnd,numEvents,sizeof(Int_t),comp);
380 for(i=0; i<nentries; i++){
381 zdcSignal->GetEvent(i);
382 entry = zdcSignal->GetArgs();
383 if(entry[0] == rnd[iev]){
384 for(k=0; k<2; k++) volume[k] = (Int_t) entry[k+1];
385 for(j=0; j<7; j++) hitsSpec[j] = entry[j+3];
387 Float_t lightQ = hitsSpec[4];
388 Float_t lightC = hitsSpec[5];
389 AliDebug(3, Form("SpectatorSignal -> vol = (%d, %d), lightQ = %.0f, lightC = %.0f",
390 volume[0], volume[1], lightQ, lightC));
391 //printf("\n Volume = (%d, %d), lightQ = %.0f, lightC = %.0f",
392 // volume[0], volume[1], lightQ, lightC);
393 if(volume[0] != 3) { // ZN or ZP
394 pm[volume[0]-1][0] += lightC;
395 pm[volume[0]-1][volume[1]] += lightQ;
396 //printf("\n pm[%d][0] = %.0f, pm[%d][%d] = %.0f\n",(volume[0]-1),pm[volume[0]-1][0],
397 // (volume[0]-1),volume[1],pm[volume[0]-1][volume[1]]);
400 if(volume[1] == 1) pm[2][1] += lightC; // ZEM 1
401 else pm[2][2] += lightQ; // ZEM 2
402 //printf("\n pm[2][1] = %.0f, pm[2][2] = %.0f\n",pm[2][1],pm[2][2]);
405 else if(entry[0] > rnd[iev]){
410 }while(iev<numEvents);
417 //_____________________________________________________________________________
418 Int_t AliZDCDigitizer::Phe2ADCch(Int_t Det, Int_t Quad, Float_t Light,
421 // Evaluation of the ADC channel corresponding to the light yield Light
422 Int_t vADCch = (Int_t) (Light * fPMGain[Det-1][Quad] * fADCRes[Res]);
423 printf("\t Phe2ADCch -> det %d quad %d - phe %.0f ADC %d\n", Det,Quad,Light,vADCch);
428 //_____________________________________________________________________________
429 Int_t AliZDCDigitizer::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
431 // Returns a pedestal for detector det, PM quad, channel with res.
435 if(fIsCalibration == 0){
436 Int_t index=0, kNch=24;
438 if(Det==1) index = Quad+kNch*Res; // ZNC
439 else if(Det==2) index = (Quad+5)+kNch*Res; // ZPC
440 else if(Det==3) index = (Quad+9)+kNch*Res; // ZEM
441 else if(Det==4) index = (Quad+12)+kNch*Res; // ZNA
442 else if(Det==5) index = (Quad+17)+kNch*Res; // ZPA
444 else index = (Det-1)/3+22+kNch*Res; // Reference PMs
446 Float_t meanPed = fPedData->GetMeanPed(index);
447 Float_t pedWidth = fPedData->GetMeanPedWidth(index);
448 pedValue = gRandom->Gaus(meanPed,pedWidth);
450 /*printf("\t AliZDCDigitizer::Pedestal -> det %d quad %d res %d - Ped[%d] = %d\n",
451 Det, Quad, Res, index,(Int_t) pedValue); // Chiara debugging!
454 // To create calibration object
456 if(Res == 0) pedValue = gRandom->Gaus((35.+10.*gRandom->Rndm()),(0.5+0.2*gRandom->Rndm())); //High gain
457 else pedValue = gRandom->Gaus((250.+100.*gRandom->Rndm()),(3.5+2.*gRandom->Rndm())); //Low gain
460 return (Int_t) pedValue;
463 //_____________________________________________________________________________
464 AliCDBStorage* AliZDCDigitizer::SetStorage(const char *uri)
467 Bool_t deleteManager = kFALSE;
469 AliCDBManager *manager = AliCDBManager::Instance();
470 AliCDBStorage *defstorage = manager->GetDefaultStorage();
472 if(!defstorage || !(defstorage->Contains("ZDC"))){
473 AliWarning("No default storage set or default storage doesn't contain ZDC!");
474 manager->SetDefaultStorage(uri);
475 deleteManager = kTRUE;
478 AliCDBStorage *storage = manager->GetDefaultStorage();
481 AliCDBManager::Instance()->UnsetDefaultStorage();
482 defstorage = 0; // the storage is killed by AliCDBManager::Instance()->Destroy()
488 //_____________________________________________________________________________
489 AliZDCPedestals* AliZDCDigitizer::GetPedData() const
492 // Getting pedestal calibration object for ZDC set
494 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/Pedestals");
495 if(!entry) AliFatal("No calibration data loaded!");
497 AliZDCPedestals *calibdata = dynamic_cast<AliZDCPedestals*> (entry->GetObject());
498 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");
503 //_____________________________________________________________________________
504 AliZDCCalib* AliZDCDigitizer::GetCalibData() const
507 // Getting calibration object for ZDC set
509 AliCDBEntry *entry = AliCDBManager::Instance()->Get("ZDC/Calib/EMDCalib");
510 if(!entry) AliFatal("No calibration data loaded!");
512 AliZDCCalib *calibdata = dynamic_cast<AliZDCCalib*> (entry->GetObject());
513 if(!calibdata) AliFatal("Wrong calibration object in calibration file!");