+ fLoader->LoadHits("read");
+ fLoader->LoadSDigits("recreate");
+ AliRunLoader* runLoader = fLoader->GetRunLoader();
+ AliZDCSDigit sdigit;
+ AliZDCSDigit* psdigit = &sdigit;
+
+ // Event loop
+ for(Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) {
+ Float_t pmZNC[5], pmZPC[5], pmZNA[5], pmZPA[5], pmZEM1=0., pmZEM2=0.;
+ for(Int_t i=0; i<5; i++) pmZNC[i] = pmZPC[i] = pmZNA[i] = pmZPA[i] = 0;
+
+ runLoader->GetEvent(iEvent);
+ TTree* treeH = fLoader->TreeH();
+ Int_t ntracks = (Int_t) treeH->GetEntries();
+ ResetHits();
+
+ // Tracks loop
+ Int_t sector[2]; Float_t trackTime = 0.;
+ for(Int_t itrack = 0; itrack < ntracks; itrack++) {
+ treeH->GetEntry(itrack);
+ for(AliZDCHit* zdcHit = (AliZDCHit*)FirstHit(-1); zdcHit;
+ zdcHit = (AliZDCHit*)NextHit()) {
+
+ sector[0] = zdcHit->GetVolume(0);
+ sector[1] = zdcHit->GetVolume(1);
+ if((sector[1] < 1) || (sector[1]>5)) {
+ Error("Hits2SDigits", "sector[0] = %d, sector[1] = %d", sector[0], sector[1]);
+ continue;
+ }
+ Float_t lightQ = zdcHit->GetLightPMQ();
+ Float_t lightC = zdcHit->GetLightPMC();
+ trackTime = zdcHit->GetTrackTOF();
+ // Signals from ZEM are delayed to arrive in time with ZDC signals
+ if(sector[0] == 3) trackTime += 320;
+ // Ch. debug
+ //printf("\t det %d vol %d trackTOF %f lightQ %1.0f lightC %1.0f\n",
+ // sector[0], sector[1], trackTime, lightQ, lightC);
+
+ if(sector[0] == 1) { //ZNC
+ pmZNC[0] += lightC;
+ pmZNC[sector[1]] += lightQ;
+ }
+ else if(sector[0] == 2) { //ZPC
+ pmZPC[0] += lightC;
+ pmZPC[sector[1]] += lightQ;
+ }
+ else if(sector[0] == 3) { //ZEM
+ if(sector[1] == 1) pmZEM1 += lightC;
+ else pmZEM2 += lightQ;
+ }
+ if(sector[0] == 4) { //ZNA
+ pmZNA[0] += lightC;
+ pmZNA[sector[1]] += lightQ;
+ }
+ else if(sector[0] == 5) { //ZPA
+ pmZPA[0] += lightC;
+ pmZPA[sector[1]] += lightQ;
+ }
+ }//Hits loop
+ }//Tracks loop
+
+ // create the output tree
+ fLoader->MakeTree("S");
+ TTree* treeS = fLoader->TreeS();
+ const Int_t kBufferSize = 4000;
+ treeS->Branch(GetName(), "AliZDCSDigit", &psdigit, kBufferSize);
+
+ // Create sdigits for ZNC
+ sector[0] = 1; // Detector = ZNC
+ for(Int_t j = 0; j < 5; j++) {
+ sector[1] = j;
+ if(pmZNC[j]>0){
+ new(psdigit) AliZDCSDigit(sector, pmZNC[j], trackTime);
+ treeS->Fill();
+ // Ch. debug
+ //printf("\t SDigit created: det %d quad %d pmZNC[%d] %1.0f trackTOF %f\n",
+ // sector[0], sector[1], j, pmZNC[j], trackTime);
+ }
+ }
+
+ // Create sdigits for ZPC
+ sector[0] = 2; // Detector = ZPC
+ for(Int_t j = 0; j < 5; j++) {
+ sector[1] = j; // Towers PM ADCs
+ if(pmZPC[j]>0){
+ new(psdigit) AliZDCSDigit(sector, pmZPC[j], trackTime);
+ treeS->Fill();
+ // Ch. debug
+ //printf("\t SDigit created: det %d quad %d pmZPC[%d] %1.0f trackTOF %f\n",
+ // sector[0], sector[1], j, pmZPC[j], trackTime);
+ }
+ }
+
+ // Create sdigits for ZEM
+ sector[0] = 3;
+ sector[1] = 1; // Detector = ZEM1
+ if(pmZEM1>0){
+ new(psdigit) AliZDCSDigit(sector, pmZEM1, trackTime);
+ treeS->Fill();
+ // Ch. debug
+ //printf("\t SDigit created: det %d quad %d pmZEM1 %1.0f trackTOF %f\n",
+ // sector[0], sector[1], pmZEM1, trackTime);
+ }
+ sector[1] = 2; // Detector = ZEM2
+ if(pmZEM2>0){
+ new(psdigit) AliZDCSDigit(sector, pmZEM2, trackTime);
+ treeS->Fill();
+ // Ch. debug
+ //printf("\t SDigit created: det %d quad %d pmZEM2 %1.0f trackTOF %f\n",
+ // sector[0], sector[1], pmZEM2, trackTime);
+ }
+
+ // Create sdigits for ZNA
+ sector[0] = 4; // Detector = ZNA
+ for(Int_t j = 0; j < 5; j++) {
+ sector[1] = j; // Towers PM ADCs
+ if(pmZNA[j]>0){
+ new(psdigit) AliZDCSDigit(sector, pmZNA[j], trackTime);
+ treeS->Fill();
+ // Ch. debug
+ //printf("\t SDigit created: det %d quad %d pmZNA[%d] %1.0f trackTOF %f\n",
+ // sector[0], sector[1], j, pmZNA[j], trackTime);
+ }
+ }
+
+ // Create sdigits for ZPA
+ sector[0] = 5; // Detector = ZPA
+ sector[1] = 0; // Common PM ADC
+ for(Int_t j = 0; j < 5; j++) {
+ sector[1] = j; // Towers PM ADCs
+ if(pmZPA[j]>0){
+ new(psdigit) AliZDCSDigit(sector, pmZPA[j], trackTime);
+ treeS->Fill();
+ // Ch. debug
+ //printf("\t SDigit created: det %d quad %d pmZPA[%d] %1.0f trackTOF %f\n",
+ // sector[0], sector[1], j, pmZPA[j], trackTime);
+ }
+ }
+
+ // write the output tree
+ fLoader->WriteSDigits("OVERWRITE");
+ }
+
+ fLoader->UnloadHits();
+ fLoader->UnloadSDigits();
+}
+
+//_____________________________________________________________________________
+AliDigitizer* AliZDC::CreateDigitizer(AliDigitizationInput* digInput) const{
+ // Create the digitizer for ZDC
+ AliZDCDigitizer *zdcDigitizer = new AliZDCDigitizer(digInput);
+ if(fSpectatorTracked==0) zdcDigitizer->SetSpectators2Track();
+ if(fBeamEnergy>0.01) zdcDigitizer->SetBeamEnergy(fBeamEnergy);
+ if(fIspASystem==kTRUE) zdcDigitizer->SetpAsystem();
+ if(fIsRELDISgen==kTRUE) zdcDigitizer->SetRELDISGenerator();
+ //if(fIspASystem==kTRUE) printf("\n **** ZDC digitizer initialized for p-A collisions\n\n");
+ return zdcDigitizer;
+}
+