//_________________________________________________________________________
//
//////////////////////////////////////////////////////////////////////////////
-// Class performs digitization of Summable digits
+// Class performs digitization of Summable digits from simulated data
//
// In addition it performs mixing of summable digits from different events.
//
#include <TTree.h>
#include <TSystem.h>
#include <TBenchmark.h>
-#include <TList.h>
-#include <TH1.h>
#include <TBrowser.h>
#include <TObjectTable.h>
#include <TRandom.h>
+#include <cassert>
// --- AliRoot header files ---
#include "AliLog.h"
#include "AliEMCALSDigitizer.h"
#include "AliEMCALGeometry.h"
#include "AliEMCALTick.h"
-#include "AliEMCALHistoUtilities.h"
ClassImp(AliEMCALDigitizer)
fEventFolderName(""),
fFirstEvent(0),
fLastEvent(0),
- fControlHists(0),
- fHists(0),fCalibData(0x0)
+ fCalibData(0x0)
{
// ctor
InitParameters() ;
- fManager = 0 ; // We work in the standalong mode
+ fManager = 0 ; // We work in the standalone mode
}
//____________________________________________________________________________
fEventFolderName(eventFolderName),
fFirstEvent(0),
fLastEvent(0),
- fControlHists(0),
- fHists(0)
+ fCalibData(0x0)
{
// ctor
InitParameters() ;
Init() ;
- fManager = 0 ; // We work in the standalong mode
+ fManager = 0 ; // We work in the standalone mode
}
//____________________________________________________________________________
fEventFolderName(d.fEventFolderName),
fFirstEvent(d.fFirstEvent),
fLastEvent(d.fLastEvent),
- fControlHists(d.fControlHists),
- fHists(d.fHists),fCalibData(d.fCalibData)
+ fCalibData(d.fCalibData)
{
// copyy ctor
}
fEventFolderName(0),
fFirstEvent(0),
fLastEvent(0),
- fControlHists(0),
- fHists(0)
+ fCalibData(0x0)
{
// ctor Init() is called by RunDigitizer
fManager = rd ;
delete [] fInputFileNames ;
delete [] fEventNames ;
- if(fHists) delete fHists;
}
//____________________________________________________________________________
// Makes the digitization of the collected summable digits
// for this it first creates the array of all EMCAL modules
- // filled with noise (different for EMC, CPV and PPSD) and
- // after that adds contributions from SDigits. This design
- // helps to avoid scanning over the list of digits to add
- // contribution of any new SDigit.
- static int isTrd1Geom = -1; // -1 - mean undefined
+ // filled with noise and after that adds contributions from
+ // SDigits. This design helps to avoid scanning over the
+ // list of digits to add contribution of any new SDigit.
+ //
+ // JLK 26-Jun-2008
+ // Note that SDigit energy info is stored as an amplitude, so we
+ // must call the Calibrate() method of the SDigitizer to convert it
+ // back to an energy in GeV before adding it to the Digit
+ //
static int nEMC=0; //max number of digits possible
AliRunLoader *rl = AliRunLoader::GetRunLoader();
rl->GetEvent(readEvent);
TClonesArray * digits = emcalLoader->Digits() ;
- digits->Delete() ;
+ digits->Delete() ; //correct way to clear array when memory is
+ //allocated by objects stored in array
// Load Geometry
AliEMCALGeometry *geom = 0;
else
AliFatal("Could not get AliRun from runLoader");
- if(isTrd1Geom < 0) {
- AliInfo(Form(" get Geometry %s : %s ", geom->GetName(),geom->GetTitle()));
- TString ng(geom->GetName());
- isTrd1Geom = 0;
- if(ng.Contains("SHISH") && ng.Contains("TRD1")) isTrd1Geom = 1;
-
- if(isTrd1Geom == 0) nEMC = geom->GetNPhi()*geom->GetNZ();
- else nEMC = geom->GetNCells();
- AliDebug(1,Form("nEMC %i (number cells in EMCAL) | %s | isTrd1Geom %i\n", nEMC, geom->GetName(), isTrd1Geom));
- }
+ nEMC = geom->GetNCells();
+ AliDebug(1,Form("nEMC %i (number cells in EMCAL) | %s \n", nEMC, geom->GetName()));
+
Int_t absID ;
digits->Expand(nEMC) ;
AliEMCALDigit * digit ;
AliEMCALDigit * curSDigit ;
- TClonesArray * ticks = new TClonesArray("AliEMCALTick",1000) ;
+ // TClonesArray * ticks = new TClonesArray("AliEMCALTick",1000) ;
//Put Noise contribution
for(absID = 0; absID < nEMC; absID++){ // Nov 30, 2006 by PAI; was from 1 to nEMC
- Float_t amp = 0 ;
+ Float_t energy = 0 ;
// amplitude set to zero, noise will be added later
new((*digits)[absID]) AliEMCALDigit( -1, -1, absID, 0, TimeOfNoise() ); // absID-1->absID
//look if we have to add signal?
if(absID==nextSig){
//Add SDigits from all inputs
- ticks->Clear() ;
- Int_t contrib = 0 ;
- Float_t a = digit->GetAmp() ;
- Float_t b = TMath::Abs( a /fTimeSignalLength) ;
+ // ticks->Clear() ;
+ //Int_t contrib = 0 ;
+
+ //Follow PHOS and comment out this timing model til a better one
+ //can be developed - JLK 28-Apr-2008
+
+ //Float_t a = digit->GetAmp() ;
+ //Float_t b = TMath::Abs( a /fTimeSignalLength) ;
//Mark the beginning of the signal
- new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime(),0, b);
+ //new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime(),0, b);
//Mark the end of the signal
- new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime()+fTimeSignalLength, -a, -b);
+ //new((*ticks)[contrib++]) AliEMCALTick(digit->GetTime()+fTimeSignalLength, -a, -b);
+
+ // Calculate time as time of the largest digit
+ Float_t time = digit->GetTime() ;
+ Float_t aTime= digit->GetAmp() ;
// loop over input
for(i = 0; i< fInput ; i++){ //loop over (possible) merge sources
else
primaryoffset = i ;
curSDigit->ShiftPrimary(primaryoffset) ;
-
- a = curSDigit->GetAmp() ;
- b = a /fTimeSignalLength ;
- new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime(),0, b);
- new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime()+fTimeSignalLength, -a, -b);
- *digit = *digit + *curSDigit ; //add energies
+ //Remove old timing model - JLK 28-April-2008
+ //a = curSDigit->GetAmp() ;
+ //b = a /fTimeSignalLength ;
+ //new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime(),0, b);
+ //new((*ticks)[contrib++]) AliEMCALTick(curSDigit->GetTime()+fTimeSignalLength, -a, -b);
+ if(curSDigit->GetAmp()>aTime) {
+ aTime = curSDigit->GetAmp();
+ time = curSDigit->GetTime();
+ }
+
+ *digit = *digit + *curSDigit ; //adds amplitudes of each digit
index[i]++ ;
if( dynamic_cast<TClonesArray *>(sdigArray->At(i))->GetEntriesFast() > index[i] )
curSDigit = 0 ;
}
}
+ //Here we convert the summed amplitude to an energy in GeV
+ energy = sDigitizer->Calibrate(digit->GetAmp()) ; // GeV
// add fluctuations for photo-electron creation
- amp = sDigitizer->Calibrate(digit->GetAmp()) ; // GeV
- amp *= static_cast<Float_t>(gRandom->Poisson(fMeanPhotonElectron)) / static_cast<Float_t>(fMeanPhotonElectron) ;
+ energy *= static_cast<Float_t>(gRandom->Poisson(fMeanPhotonElectron)) / static_cast<Float_t>(fMeanPhotonElectron) ;
//calculate and set time
- Float_t time = FrontEdgeTime(ticks) ;
+ //New timing model needed - JLK 28-April-2008
+ //Float_t time = FrontEdgeTime(ticks) ;
digit->SetTime(time) ;
//Find next signal module
}
}
// add the noise now
- amp += TMath::Abs(gRandom->Gaus(0., fPinNoise)) ;
- digit->SetAmp(sDigitizer->Digitize(amp)) ;
- AliDebug(10,Form(" absID %5i amp %f nextSig %5i\n",
- absID, amp, nextSig));
- } // for(absID = 1; absID <= nEMC; absID++)
+ energy += TMath::Abs(gRandom->Gaus(0., fPinNoise)) ;
+ // JLK 26-June-2008
+ //Now digitize the energy according to the sDigitizer method,
+ //which merely converts the energy to an integer. Later we will
+ //check that the stored value matches our allowed dynamic ranges
+ digit->SetAmp(sDigitizer->Digitize(energy)) ;
+ AliDebug(10,Form(" absID %5i energy %f nextSig %5i\n",
+ absID, energy, nextSig));
+ } // for(absID = 0; absID < nEMC; absID++)
- ticks->Delete() ;
- delete ticks ;
+ //ticks->Delete() ;
+ //delete ticks ;
+ //JLK is it better to call Clear() here?
delete sdigArray ; //We should not delete its contents
//remove digits below thresholds
for(i = 0 ; i < nEMC ; i++){
digit = dynamic_cast<AliEMCALDigit*>( digits->At(i) ) ;
- Float_t threshold = fDigitThreshold ;
+ Float_t threshold = fDigitThreshold ; //this is in GeV
+ //need to calibrate digit amplitude to energy in GeV for comparison
if(sDigitizer->Calibrate( digit->GetAmp() ) < threshold)
digits->RemoveAt(i) ;
else
digits->Compress() ;
Int_t ndigits = digits->GetEntriesFast() ;
-
- //Set indexes in list of digits and fill hists.
- AliEMCALHistoUtilities::FillH1(fHists, 0, Double_t(ndigits));
- Float_t energy=0., esum=0.;
+
+ //JLK 26-June-2008
+ //After we have done the summing and digitizing to create the
+ //digits, now we want to calibrate the resulting amplitude to match
+ //the dynamic range of our real data.
+ Float_t energy=0;
for (i = 0 ; i < ndigits ; i++) {
digit = dynamic_cast<AliEMCALDigit *>( digits->At(i) ) ;
digit->SetIndexInList(i) ;
energy = sDigitizer->Calibrate(digit->GetAmp()) ;
- esum += energy;
- digit->SetAmp(DigitizeEnergy(energy, digit->GetId()) ) ; // for what ??
- AliEMCALHistoUtilities::FillH1(fHists, 2, double(digit->GetAmp()));
- AliEMCALHistoUtilities::FillH1(fHists, 3, double(energy));
- AliEMCALHistoUtilities::FillH1(fHists, 4, double(digit->GetId()));
- // if(digit->GetId() == nEMC) {
- // printf(" i %i \n", i );
- // digit->Dump();
- // assert(0);
- //}
+ digit->SetAmp(DigitizeEnergy(energy, digit->GetId()) ) ;
}
- AliEMCALHistoUtilities::FillH1(fHists, 1, esum);
+
}
// //_____________________________________________________________________
Int_t AliEMCALDigitizer::DigitizeEnergy(Float_t energy, Int_t AbsId)
{
+ // JLK 26-June-2008
// Returns digitized value of the energy in a cell absId
-
+ // using the calibration constants stored in the OCDB
+ // or default values if no CalibData object is found.
+ // This effectively converts everything to match the dynamic range
+ // of the real data we will collect
+ //
// Load Geometry
const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
//to prevent cleaning of this object while GetEvent is called
emcalLoader->GetDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
- //PH Print();
//Calibration instance
fCalibData = emcalLoader->CalibData();
return fInit ;
//____________________________________________________________________________
void AliEMCALDigitizer::InitParameters()
{
- //parameter initialization for digitizer
- // Tune parameters - 24-nov-04
+ // Parameter initialization for digitizer
+ // Tune parameters - 24-nov-04; Apr 29, 2007
+ // New parameters JLK 14-Apr-2008
- fMeanPhotonElectron = 3300 ; // electrons per GeV
- fPinNoise = 0.004;
+ fMeanPhotonElectron = 4400; // electrons per GeV
+ fPinNoise = 0.037; // pin noise in GEV from analysis test beam data
if (fPinNoise == 0. )
Warning("InitParameters", "No noise added\n") ;
fDigitThreshold = fPinNoise * 3; // 3 * sigma
fTimeResolution = 0.3e-9 ; // 300 psc
fTimeSignalLength = 1.0e-9 ;
- fADCchannelEC = 0.00305; // 200./65536 - width of one ADC channel in GeV
- fADCpedestalEC = 0.009 ; // GeV
+ // These defaults are normally not used.
+ // Values are read from calibration database instead
+ fADCchannelEC = 0.0153; // Update 24 Apr 2007: 250./16/1024 - width of one ADC channel in GeV
+ fADCpedestalEC = 0.0 ; // GeV
fNADCEC = (Int_t) TMath::Power(2,16) ; // number of channels in Tower ADC - 65536
fTimeThreshold = 0.001*10000000 ; // Means 1 MeV in terms of SDigits amplitude ??
- // hists. for control; no hists on default
- fControlHists = 0;
- fHists = 0;
+
}
//__________________________________________________________________
fInput++ ;
}
+//__________________________________________________________________
void AliEMCALDigitizer::Print1(Option_t * option)
{ // 19-nov-04 - just for convinience
Print();
}
+//__________________________________________________________________
void AliEMCALDigitizer::Browse(TBrowser* b)
{
- if(fHists) b->Add(fHists);
TTask::Browse(b);
}
-
-TList *AliEMCALDigitizer::BookControlHists(int var)
-{
- // 22-nov-04
- // histograms for monitoring digitizer performance
-
- Info("BookControlHists"," started ");
- gROOT->cd();
- const AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
- if(var>=1){
- new TH1F("hDigiN", "#EMCAL digits with fAmp > fDigitThreshold",
- fNADCEC+1, -0.5, Double_t(fNADCEC));
- new TH1F("HDigiSumEnergy","Sum.EMCAL energy from digi", 1000, 0.0, 200.);
- new TH1F("hDigiAmp", "EMCAL digital amplitude", fNADCEC+1, -0.5, Double_t(fNADCEC));
- new TH1F("hDigiEnergy","EMCAL cell energy", 2000, 0.0, 200.);
- new TH1F("hDigiAbsId","EMCAL absId cells with fAmp > fDigitThreshold ",
- geom->GetNCells(), 0.5, Double_t(geom->GetNCells())+0.5);
- }
-
- fHists = AliEMCALHistoUtilities::MoveHistsToList("EmcalDigiControlHists", kFALSE);
- fHists = 0; //huh? JLK 03-Mar-2006
- return fHists;
-}
-
-void AliEMCALDigitizer::SaveHists(const char* name, Bool_t kSingleKey, const char* opt)
-{
- AliEMCALHistoUtilities::SaveListOfHists(fHists, name, kSingleKey, opt);
-}
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff