* provided "as is" without express or implied warranty. *
**************************************************************************/
-//_________________________________________________________________________
-//
-// This constructs Digits out of Hits
-//
+/* $Id$ */
+
+///_________________________________________________________________________
+///
+/// This class constructs Digits out of Hits
+///
+///
// --- Standard library ---
-#include <Riostream.h>
-#include <stdlib.h>
// --- ROOT system ---
-#include <TFile.h>
-#include <TFolder.h>
-#include <TROOT.h>
-#include <TSystem.h>
+#include <TMath.h>
#include <TTree.h>
-#include <TVirtualMC.h>
+#include <TGeoManager.h>
+#include <TGeoPhysicalNode.h>
+#include <AliGeomManager.h>
+#include <TRandom.h>
// --- AliRoot header files ---
#include "AliVZEROConst.h"
#include "AliRun.h"
#include "AliVZERO.h"
#include "AliVZEROhit.h"
-#include "AliHit.h"
-#include "AliDetector.h"
#include "AliRunLoader.h"
#include "AliLoader.h"
-#include "AliConfig.h"
#include "AliRunDigitizer.h"
-#include "AliDigitizer.h"
-#include "AliHeader.h"
-#include "AliStack.h"
-#include "AliVZERODigitizer.h"
+#include "AliCDBManager.h"
+#include "AliCDBStorage.h"
+#include "AliCDBEntry.h"
+#include "AliVZEROCalibData.h"
+
#include "AliVZEROdigit.h"
-#include "AliMC.h"
+#include "AliVZERODigitizer.h"
ClassImp(AliVZERODigitizer)
AliVZERODigitizer::AliVZERODigitizer()
+ :AliDigitizer(),
+ fCalibData(GetCalibData()),
+ fPhotoCathodeEfficiency(0.18),
+ fPMVoltage(768.0),
+ fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)),
+ fNdigits(0),
+ fDigits(0)
+
{
- if (!fDigits) fDigits = new TClonesArray("AliVZEROdigit", 1000);
+ // default constructor
+
+// fNdigits = 0;
+// fDigits = 0;
+//
+// fPhotoCathodeEfficiency = 0.18;
+// fPMVoltage = 768.0;
+// fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277);
- fNevents = 0 ;
- fDigits = 0 ;
- fNdigits = 0;
- fHits = 0 ;
- fRunLoader = 0;
-
- fPhotoCathodeEfficiency = 0.18;
- fPMVoltage = 768.0;
- fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277);
+// fCalibData = GetCalibData();
}
//____________________________________________________________________________
AliVZERODigitizer::AliVZERODigitizer(AliRunDigitizer* manager)
- :AliDigitizer(manager)
-
+ :AliDigitizer(manager),
+ fCalibData(GetCalibData()),
+ fPhotoCathodeEfficiency(0.18),
+ fPMVoltage(768.0),
+ fPMGain(TMath::Power((fPMVoltage / 112.5) ,7.04277)),
+ fNdigits(0),
+ fDigits(0)
+
{
// constructor
- fNevents = 0;
- fDigits = 0;
- fNdigits = 0;
- fHits = 0;
- fRunLoader = 0;
+// fNdigits = 0;
+// fDigits = 0;
+//
+// fPhotoCathodeEfficiency = 0.18;
+// fPMVoltage = 768.0;
+// fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 );
+
+// fCalibData = GetCalibData();
- fPhotoCathodeEfficiency = 0.18;
- fPMVoltage = 768.0;
- fPMGain = TMath::Power( (fPMVoltage / 112.5) ,7.04277 );
}
//____________________________________________________________________________
if (fDigits) {
fDigits->Delete();
delete fDigits;
- fDigits=0; }
+ fDigits=0;
+ }
}
-//____________________________________________________________________________
-void AliVZERODigitizer::OpengAliceFile(const char *file)
+//_____________________________________________________________________________
+Bool_t AliVZERODigitizer::Init()
{
- // Loads galice.root file and corresponding header, kinematics
- // hits and digits
-
- fRunLoader = AliRunLoader::Open(file,AliConfig::fgkDefaultEventFolderName,
- "UPDATE");
-
- if (!fRunLoader)
- {
- Error("Open","Can not open session for file %s.",file);
- }
-
- fRunLoader->LoadgAlice();
- fRunLoader->LoadHeader();
- fRunLoader->LoadKinematics();
+ // Initialises the digitizer
- gAlice = fRunLoader->GetAliRun();
-
- if (gAlice)
- { printf("<AliVZEROdigitizer::Open> ");
- printf("AliRun object found on file.\n");}
- else
- { printf("<AliVZEROdigitizer::Open> ");
- printf("Could not find AliRun object.\n");}
-
- // Initialise Hit and Digit arrays
- fHits = new TClonesArray ("AliVZEROhit", 1000);
+ // Initialises the Digit array
fDigits = new TClonesArray ("AliVZEROdigit", 1000);
-
- fVZERO = (AliVZERO*) gAlice->GetDetector("VZERO");
- fVZEROLoader = fRunLoader->GetLoader("VZEROLoader");
- if (fVZEROLoader == 0x0){
- cerr<<"Hits2Digits : Can not find VZERO or VZEROLoader\n";}
-
- Int_t retval = fVZEROLoader->LoadHits("read");
- if (retval){
- Error("Open","Error occured while loading hits... Exiting.");
- return;}
-
- fVZEROLoader->LoadDigits("recreate");
+ // TGeoHMatrix *im = AliGeomManager::GetMatrix("VZERO/V0C");
+ // im->Print();
+
+ return kTRUE;
}
//____________________________________________________________________________
-void AliVZERODigitizer::Exec()
- {
+void AliVZERODigitizer::Exec(Option_t* /*option*/)
+{
+ // Creates digits from hits
+
+ Int_t map[80]; // 48 values on V0C + 32 on V0A
+ Int_t pmNumber[80];
+ Int_t adc[64]; // 32 PMs on V0C + 32 PMs on V0A
+ Float_t time[80], time_ref[80], time2[64];
+ Float_t adc_gain[80];
+ Float_t adc_pedestal[64],adc_sigma[64];
+ fNdigits = 0;
+ Float_t pmGain_smeared[64];
+ Float_t cPM[80];
+
+ // Smearing of the PM tubes intrinsic characteristics
+
+ for(Int_t ii=0; ii<64; ii++) {
+ pmGain_smeared[ii] = gRandom->Gaus(fPMGain, fPMGain/5); }
+
+ // Retrieval of ADC gain values and pedestal information from local CDB
+ // I use only the first 64th values of the calibration array in CDB
+ // as I have no beam burst structure - odd or even beam burst number
+
+ // Reminder : We have 16 scintillating cells mounted on 8 PMs
+ // on Ring 3 and Ring 4 in V0C - added to produce ADC outputs
+ // on these rings...
+
+ for(Int_t i=0; i<16; i++) {
+ adc_gain[i] = fCalibData->GetGain(i);
+ cPM[i] = fPhotoCathodeEfficiency * pmGain_smeared[i];}
+
+ for(Int_t j=16; j<48; j=j+2) {
+ Int_t i=(j+17)/2;
+ adc_gain[j] = fCalibData->GetGain(i);
+ adc_gain[j+1] = fCalibData->GetGain(i);
+ cPM[j] = fPhotoCathodeEfficiency * pmGain_smeared[i];
+ cPM[j+1] = fPhotoCathodeEfficiency * pmGain_smeared[i]; }
+
+ for(Int_t i=48; i<80; i++){
+ adc_gain[i] = fCalibData->GetGain(i-16);
+ cPM[i] = fPhotoCathodeEfficiency * pmGain_smeared[i-16];};
+
+ for(Int_t i=0; i<64; i++){ adc_pedestal[i] = fCalibData->GetPedestal(i);
+ adc_sigma[i] = fCalibData->GetSigma(i); };
+
+// for(Int_t i=0; i<64; i++) { printf(" i = %d pedestal = %f sigma = %f \n\n",
+// i, adc_pedestal[i], adc_sigma[i] );}
+
+ AliRunLoader* outRunLoader =
+ AliRunLoader::GetRunLoader(fManager->GetOutputFolderName());
+ if (!outRunLoader) {
+ Error("Exec", "Can not get output Run Loader");
+ return;}
+
+ AliLoader* outLoader = outRunLoader->GetLoader("VZEROLoader");
+ if (!outLoader) {
+ Error("Exec", "Can not get output VZERO Loader");
+ return;}
- Int_t nbytes;
- fNdigits = 0;
- Int_t N;
- Int_t map[96];
- Int_t cell = 0;
- Float_t cPM = fPhotoCathodeEfficiency * fPMGain;
-
- for(Int_t i=0; i<96; i++) map[i] = 0;
-
- fNevents = (Int_t) fRunLoader->TreeE()->GetEntries ();
- printf(" Number of events in file = %d \n", fNevents);
+ outLoader->LoadDigits("update");
+ if (!outLoader->TreeD()) outLoader->MakeTree("D");
+ outLoader->MakeDigitsContainer();
+ TTree* treeD = outLoader->TreeD();
+ Int_t bufsize = 16000;
+ treeD->Branch("VZERODigit", &fDigits, bufsize);
- for (Int_t ievent = 0; ievent < fNevents; ievent++){
-
- for(Int_t i=0; i<96; i++) map[i] = 0;
+ for (Int_t iInput = 0; iInput < fManager->GetNinputs(); iInput++) {
+ AliRunLoader* runLoader =
+ AliRunLoader::GetRunLoader(fManager->GetInputFolderName(iInput));
+ AliLoader* loader = runLoader->GetLoader("VZEROLoader");
+ if (!loader) {
+ Error("Exec", "Can not get VZERO Loader for input %d", iInput);
+ continue;}
- fRunLoader->GetEvent(ievent);
+ if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
+
+ AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO");
+ if (!vzero) {
+ Error("Exec", "No VZERO detector for input %d", iInput);
+ continue;}
- fTreeH = fVZEROLoader->TreeH();
- if (fTreeH == 0x0)
- { Error("Exec","Cannot get TreeH");
- return; }
+ loader->LoadHits();
+ TTree* treeH = loader->TreeH();
+ if (!treeH) {
+ Error("Exec", "Cannot get TreeH for input %d", iInput);
+ continue; }
+
+ for(Int_t i=0; i<80; i++) {map[i] = 0; time[i] = 0.0;}
+
+ TClonesArray* hits = vzero->Hits();
- fTreeD = fVZEROLoader->TreeD();
- if (fTreeD == 0x0)
- { fVZEROLoader->MakeTree("D");
- fVZEROLoader->MakeDigitsContainer();
- fTreeD = fVZEROLoader->TreeD(); }
-
- Int_t bufsize = 16000;
- fTreeD->Branch("VZERODigit", &fDigits, bufsize);
-
-// Now make Digits from hits
+// Now makes Digits from hits
+
+ Int_t nTracks = (Int_t) treeH->GetEntries();
+ for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
+ for (Int_t i=0; i<80; i++) {time_ref[i] = 999999.0;}
+ vzero->ResetHits();
+ treeH->GetEvent(iTrack);
+ Int_t nHits = hits->GetEntriesFast();
+ for (Int_t iHit = 0; iHit < nHits; iHit++) {
+ AliVZEROhit* hit = (AliVZEROhit *)hits->UncheckedAt(iHit);
+ Int_t nPhot = hit->Nphot();
+ Int_t cell = hit->Cell();
+ map[cell] += nPhot;
+ Float_t dt_scintillator = gRandom->Gaus(0,0.7);
+ Float_t t = dt_scintillator + 1e9*hit->Tof();
+ if (t > 0.0) {
+ if(t < time_ref[cell]) time_ref[cell] = t;
+ time[cell] = TMath::Min(t,time_ref[cell]); }
+ } // hit loop
+ } // track loop
- if (fVZERO)
- {
- fHits = fVZERO->Hits();
+ loader->UnloadHits();
+
+ } // input loop
+
+// Now builds the scintillator cell response (80 cells i.e. 80 responses)
- Int_t ntracks = (Int_t) fTreeH->GetEntries ();
-// printf(" Number of Tracks in the TreeH = %d \n", ntracks);
- for (Int_t track = 0; track < ntracks; track++)
- {
- gAlice->ResetHits ();
- nbytes += fTreeH->GetEvent(track);
- fParticle = fRunLoader->Stack()->Particle(track);
- Int_t nhits = fHits->GetEntriesFast();
- for (Int_t hit = 0; hit < nhits; hit++)
- {
- fVZEROHit = (AliVZEROhit *)fHits->UncheckedAt(hit);
- N = fVZEROHit->Nphot();
- cell = fVZEROHit->Cell();
- map[cell] = map[cell] + N;
- } // hit loop
- } // track loop
-
- Int_t icount = 0;
-
- for(Int_t i=0; i<96; i++) {
- Float_t q1 = Float_t ( map[i] )* cPM * kQe;
- Float_t noise = gRandom->Gaus(10.5,3.22);
- Float_t PMresponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau))
- + noise*1e-3;
- map[i] = Int_t( PMresponse * 200.0);
- if(map[i] > 3) {
- icount++;
-// printf(" Event, cell, adc = %d %d %d\n", ievent, i, map[i]);
- AddDigit(ievent, i, map[i]);}
- }
-
- fTreeD->Reset();
- fTreeD->Fill();
- ResetDigit();
- fVZEROLoader->WriteDigits("OVERWRITE");
- fVZEROLoader->UnloadDigits();
- } // VZERO loop
- } //event loop
+ for (Int_t i=0; i<80; i++) {
+ Float_t q1 = Float_t ( map[i] )* cPM[i] * kQe;
+ Float_t noise = gRandom->Gaus(10.5,3.22);
+ Float_t pmResponse = q1/kC*TMath::Power(ktheta/kthau,1/(1-ktheta/kthau))
+ + noise*1e-3;
+ map[i] = Int_t( pmResponse * adc_gain[i]);
+// printf("cell=%d, pmNumber=%d, mip=%f \n",i,GetPMNumber(i), (1.0/fCalibData->GetMIPperADC(GetPMNumber(i))));
+ if(map[i] > (int(( 1.0/fCalibData->GetMIPperADC(GetPMNumber(i))/2 ) + 0.5)) )
+ {map[i] = Int_t(gRandom->Gaus(map[i], (int(( 1.0/fCalibData->GetMIPperADC(GetPMNumber(i))/6 ) + 0.5)) ));}
+ }
+
+// Now transforms 80 cell responses into 64 photomultiplier responses
+// Also adds the ADC pedestals taken out of the calibration data base
+
+ for (Int_t j=0; j<16; j++){
+ adc[j] = static_cast<Int_t>(map [j] + gRandom->Gaus(adc_pedestal[j], adc_sigma[j]));
+ time2[j]= time[j];}
+
+ for (Int_t j=48; j<80; j++){
+ adc[j-16] = static_cast<Int_t>(map [j]
+ + gRandom->Gaus(adc_pedestal[j-16],adc_sigma[j-16]));
+ time2[j-16]= time[j]; }
+
+ for (Int_t j=0; j<16; j++){
+ adc[16+j] = static_cast<Int_t>(map [16+2*j]+ map [16+2*j+1]
+ + gRandom->Gaus(adc_pedestal[16+j], adc_sigma[16+j]));
+ Float_t min_time = TMath::Min(time [16+2*j],time [16+2*j+1]);
+ time2[16+j] = min_time;
+ if(min_time==0.0){time2[16+j]=TMath::Max(time[16+2*j],time[16+2*j+1]);}
+ }
+
+
+// Now add digits to the digit Tree
+
+ for (Int_t i=0; i<64; i++) {
+ if(adc[i] > 0) {
+// printf(" Event, cell, adc, tof = %d %d %d %f\n",
+// outRunLoader->GetEventNumber(),i, map[i], time2[i]*10.0);
+// multiply by 10 to have 100 ps per channel :
+ AddDigit(i, adc[i], Int_t(time2[i]*10.0)) ;}
+ }
+
+ treeD->Fill();
+ outLoader->WriteDigits("OVERWRITE");
+ outLoader->UnloadDigits();
+ ResetDigit();
}
//____________________________________________________________________________
-void AliVZERODigitizer::AddDigit(Int_t eventnumber, Int_t cellnumber, Int_t adc)
+void AliVZERODigitizer::AddDigit(Int_t PMnumber, Int_t adc, Int_t time)
{
// Adds Digit
TClonesArray &ldigits = *fDigits;
- new(ldigits[fNdigits++]) AliVZEROdigit(eventnumber,cellnumber,adc);
+ new(ldigits[fNdigits++]) AliVZEROdigit(PMnumber,adc,time);
}
//____________________________________________________________________________
void AliVZERODigitizer::ResetDigit()
{
+//
// Clears Digits
+//
fNdigits = 0;
- if (fDigits) fDigits->Clear();
+ if (fDigits) fDigits->Delete();
+}
+
+//____________________________________________________________________________
+AliVZEROCalibData* AliVZERODigitizer::GetCalibData() const
+
+{
+ AliCDBManager *man = AliCDBManager::Instance();
+
+ AliCDBEntry *entry=0;
+
+ entry = man->Get("VZERO/Calib/Data");
+
+// if(!entry){
+// AliWarning("Load of calibration data from default storage failed!");
+// AliWarning("Calibration data will be loaded from local storage ($ALICE_ROOT)");
+// Int_t runNumber = man->GetRun();
+// entry = man->GetStorage("local://$ALICE_ROOT/OCDB")
+// ->Get("VZERO/Calib/Data",runNumber);
+//
+// }
+
+ // Retrieval of data in directory VZERO/Calib/Data:
+
+
+ AliVZEROCalibData *calibdata = 0;
+
+ if (entry) calibdata = (AliVZEROCalibData*) entry->GetObject();
+ if (!calibdata) AliFatal("No calibration data from calibration database !");
+
+ return calibdata;
+
}
+
+//____________________________________________________________________________
+Int_t AliVZERODigitizer::GetPMNumber(Int_t cell) const
+
+{
+
+ Int_t pmNumber[80] = { 0, 1, 2, 3, 4, 5, 6, 7,
+ 8, 9, 10, 11, 12, 13, 14, 15,
+ 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
+ 24, 24, 25, 25, 26, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31,
+ 32, 33, 34, 35, 36, 37, 38, 39,
+ 40, 41, 42, 43, 44, 45, 46, 47,
+ 48, 49, 50, 51, 52, 53, 54, 55,
+ 56, 57, 58, 59, 60, 61, 62, 63 };
+
+ return pmNumber[cell];
+}
+
+
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