* provided "as is" without express or implied warranty. *
**************************************************************************/
+/* $Id$ */
+
///_________________________________________________________________________
///
/// This class constructs Digits out of Hits
// --- Standard library ---
// --- ROOT system ---
+#include <TMath.h>
#include <TTree.h>
+#include <TGeoManager.h>
+#include <TGeoPhysicalNode.h>
+#include <AliGeomManager.h>
+#include <TRandom.h>
// --- AliRoot header files ---
#include "AliVZEROConst.h"
#include "AliRunLoader.h"
#include "AliLoader.h"
#include "AliRunDigitizer.h"
+#include "AliCDBManager.h"
+#include "AliCDBStorage.h"
+#include "AliCDBEntry.h"
+#include "AliVZEROCalibData.h"
+
#include "AliVZEROdigit.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)
+
{
// default constructor
- fNdigits = 0;
- fDigits = 0 ;
-
- fPhotoCathodeEfficiency = 0.18;
- fPMVoltage = 768.0;
- fPMGain = TMath::Power((fPMVoltage / 112.5) ,7.04277);
+// fNdigits = 0;
+// fDigits = 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
- fNdigits = 0;
- fDigits = 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 );
}
//____________________________________________________________________________
// Initialises the Digit array
fDigits = new TClonesArray ("AliVZEROdigit", 1000);
-
+
+ // TGeoHMatrix *im = AliGeomManager::GetMatrix("VZERO/V0C");
+ // im->Print();
+
return kTRUE;
}
//____________________________________________________________________________
void AliVZERODigitizer::Exec(Option_t* /*option*/)
-{
- //
+{
// Creates digits from hits
- //
+
+ Int_t map[80]; // 48 values on V0C + 32 on V0A
+ 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];
- Int_t adc[96];
- Float_t time[96];
- fNdigits = 0;
- Float_t cPM = fPhotoCathodeEfficiency * fPMGain;
-
+ // 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;
- }
+ return;}
+
AliLoader* outLoader = outRunLoader->GetLoader("VZEROLoader");
if (!outLoader) {
Error("Exec", "Can not get output VZERO Loader");
- return;
- }
+ return;}
outLoader->LoadDigits("update");
if (!outLoader->TreeD()) outLoader->MakeTree("D");
outLoader->MakeDigitsContainer();
- TTree* treeD = outLoader->TreeD();
+ TTree* treeD = outLoader->TreeD();
Int_t bufsize = 16000;
treeD->Branch("VZERODigit", &fDigits, bufsize);
-
+
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;
- }
- if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
-
- AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO");
- if (!vzero) {
- Error("Exec", "No VZERO detector for input %d", iInput);
- continue;
- }
+ 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;}
- loader->LoadHits();
- TTree* treeH = loader->TreeH();
- if (!treeH) {
- Error("Exec", "Cannot get TreeH for input %d", iInput);
- continue;
- }
-
- Float_t timeV0 = 1e12;
- for(Int_t i=0; i<96; i++) { adc[i] = 0; time[i] = 0.0; }
+ if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
+
+ AliVZERO* vzero = (AliVZERO*) runLoader->GetAliRun()->GetDetector("VZERO");
+ if (!vzero) {
+ Error("Exec", "No VZERO detector for input %d", iInput);
+ continue;}
+
+ 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();
+ TClonesArray* hits = vzero->Hits();
// Now makes Digits from hits
- Int_t nTracks = (Int_t) treeH->GetEntries();
- for (Int_t iTrack = 0; iTrack < nTracks; iTrack++) {
- 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();
- adc[cell] += nPhot;
- Float_t dt_scintillator = gRandom->Gaus(0,0.3);
- time[cell] = dt_scintillator + 1e9*hit->Tof();
- if(time[cell] < timeV0) timeV0 = time[cell];
- } // hit loop
- } // track loop
-
- loader->UnloadHits();
+ 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
+
+ loader->UnloadHits();
} // input loop
-
- for (Int_t i=0; i<96; i++) {
- Float_t q1 = Float_t ( adc[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;
- adc[i] = Int_t( pmResponse * 50.0);
- if(adc[i] > 0) {
-// printf(" Event, cell, adc, tof = %d %d %d %f\n",
-// outRunLoader->GetEventNumber(),i, adc[i], time[i]*100.0);
-// multiply by 10 to have 100 ps per channel :
- AddDigit(i, adc[i], Int_t(time[i]*10.0) );
- }
- }
+// Now builds the scintillator cell response (80 cells i.e. 80 responses)
+
+ 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]);
+ if(map[i] > (110/2)) {map[i] = Int_t(gRandom->Gaus(map[i], 110/6));}
+ }
+
+// 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();
}
//____________________________________________________________________________
-void AliVZERODigitizer::AddDigit(Int_t cellnumber, Int_t adc, Int_t time)
+void AliVZERODigitizer::AddDigit(Int_t PMnumber, Int_t adc, Int_t time)
{
// Adds Digit
TClonesArray &ldigits = *fDigits;
- new(ldigits[fNdigits++]) AliVZEROdigit(cellnumber,adc,time);
+ new(ldigits[fNdigits++]) AliVZEROdigit(PMnumber,adc,time);
}
//____________________________________________________________________________
void AliVZERODigitizer::ResetDigit()
fNdigits = 0;
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")
+// ->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;
+
+}
+
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff