// A Summable Digits is the sum of all hits originating
// from one in one tower of the EMCAL
// A threshold for assignment of the primary to SDigit is applied
+//
+// JLK 26-Jun-2008 Added explanation:
+// SDigits need to hold the energy sum of the hits, but AliEMCALDigit
+// can (should) only store amplitude. Therefore, the SDigit energy is
+// "digitized" before being stored and must be "calibrated" back to an
+// energy before SDigits are summed to form true Digits
+//
// SDigits are written to TreeS, branch "EMCAL"
// AliEMCALSDigitizer with all current parameters is written
// to TreeS branch "AliEMCALSDigitizer".
//////////////////////////////////////////////////////////////////////////////
// --- ROOT system ---
-#include "TBenchmark.h"
-#include "TH1.h"
-#include "TBrowser.h"
-#include "Riostream.h"
-//#include "TObjectTable.h"
+#include <TBenchmark.h>
+#include <TBrowser.h>
+#include <Riostream.h>
+#include <TMath.h>
+#include <TROOT.h>
// --- Standard library ---
#include "stdlib.h"
#include "AliEMCALHit.h"
#include "AliEMCALSDigitizer.h"
#include "AliEMCALGeometry.h"
-#include "AliEMCALHistoUtilities.h"
ClassImp(AliEMCALSDigitizer)
//____________________________________________________________________________
- AliEMCALSDigitizer::AliEMCALSDigitizer():TTask("","")
+AliEMCALSDigitizer::AliEMCALSDigitizer()
+ : TTask("",""),
+ fA(0.),fB(0.),fECPrimThreshold(0.),
+ fDefaultInit(kTRUE),
+ fEventFolderName(0),
+ fInit(0),
+ fSDigitsInRun(0),
+ fFirstEvent(0),
+ fLastEvent(0),
+ fSampling(0.)
{
// ctor
- fFirstEvent = fLastEvent = fControlHists = 0;
- fDefaultInit = kTRUE ;
- fHists = 0;
+ InitParameters();
}
//____________________________________________________________________________
AliEMCALSDigitizer::AliEMCALSDigitizer(const char * alirunFileName,
- const char * eventFolderName):
- TTask("EMCAL"+AliConfig::Instance()->GetSDigitizerTaskName(), alirunFileName),
- fEventFolderName(eventFolderName)
+ const char * eventFolderName)
+ : TTask("EMCAL"+AliConfig::Instance()->GetSDigitizerTaskName(), alirunFileName),
+ fA(0.),fB(0.),fECPrimThreshold(0.),
+ fDefaultInit(kFALSE),
+ fEventFolderName(eventFolderName),
+ fInit(0),
+ fSDigitsInRun(0),
+ fFirstEvent(0),
+ fLastEvent(0),
+ fSampling(0.)
{
// ctor
- fFirstEvent = fLastEvent = fControlHists = 0 ; // runs one event by defaut
Init();
InitParameters() ;
- fDefaultInit = kFALSE ;
- fHists = 0;
+
}
//____________________________________________________________________________
-AliEMCALSDigitizer::AliEMCALSDigitizer(const AliEMCALSDigitizer & sd) : TTask(sd) {
+AliEMCALSDigitizer::AliEMCALSDigitizer(const AliEMCALSDigitizer & sd)
+ : TTask(sd.GetName(),sd.GetTitle()),
+ fA(sd.fA),
+ fB(sd.fB),
+ fECPrimThreshold(sd.fECPrimThreshold),
+ fDefaultInit(sd.fDefaultInit),
+ fEventFolderName(sd.fEventFolderName),
+ fInit(sd.fInit),
+ fSDigitsInRun(sd.fSDigitsInRun),
+ fFirstEvent(sd.fFirstEvent),
+ fLastEvent(sd.fLastEvent),
+ fSampling(sd.fSampling)
+{
//cpy ctor
-
- fFirstEvent = sd.fFirstEvent ;
- fLastEvent = sd.fLastEvent ;
- fA = sd.fA ;
- fB = sd.fB ;
- fECPrimThreshold = sd.fECPrimThreshold ;
- fSDigitsInRun = sd.fSDigitsInRun ;
- SetName(sd.GetName()) ;
- SetTitle(sd.GetTitle()) ;
- fEventFolderName = sd.fEventFolderName;
}
//____________________________________________________________________________
AliEMCALSDigitizer::~AliEMCALSDigitizer() {
+ //dtor
AliLoader *emcalLoader=0;
if ((emcalLoader = AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL")))
emcalLoader->CleanSDigitizer();
//============================================================= YS
// The initialisation is now done by the getter
- fInit = kTRUE ;
+ fInit = kTRUE;
AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL"));
//____________________________________________________________________________
void AliEMCALSDigitizer::InitParameters()
{
+ //initialize parameters for sdigitization
+
const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
if (geom->GetSampling() == 0.) {
Fatal("InitParameters", "Sampling factor not set !") ;
}
+
+ //
+ //JLK 26-Jun-2008 THIS SHOULD HAVE BEEN EXPLAINED AGES AGO:
+ //
+ //In order to be able to store SDigit Energy info into
+ //AliEMCALDigit, we need to convert it temporarily to an ADC amplitude
+ //and later when summing SDigits to form digits, convert it back to
+ //energy. These fA and fB parameters accomplish this through the
+ //Digitize() and Calibrate() methods
+ //
// Initializes parameters
fA = 0;
- fB = 1.e+7;
+ fB = 1.e+6; // Changed 24 Apr 2007. Dynamic range now 2 TeV
fSampling = geom->GetSampling();
- // threshold for deposit energy of hit
- fECPrimThreshold = 0.; // 24-nov-04 - was 1.e-6;
+ // threshold for deposit energy of hit
+ fECPrimThreshold = 0.05;// GeV // 22-may-07 was 0// 24-nov-04 - was 1.e-6;
+
+ AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName()));
+ AliDebug(2,Form(" fInit %i\n", int(fInit)));
+ AliDebug(2,Form(" fFirstEvent %i\n", fFirstEvent));
+ AliDebug(2,Form(" fLastEvent %i\n", fLastEvent));
+ AliDebug(2,Form(" Writing SDigits to branch with title %s\n", fEventFolderName.Data()));
+ AliDebug(2,Form(" with digitization parameters A = %f\n", fA));
+ AliDebug(2,Form(" B = %f\n", fB));
+ AliDebug(2,Form(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold));
+ AliDebug(2,Form(" Sampling = %f\n", fSampling));
+ AliDebug(2,Form("---------------------------------------------------\n"));
+
+
}
//____________________________________________________________________________
// Collects all hit of the same tower into digits
TString o(option); o.ToUpper();
if (strstr(option, "print") ) {
- Print() ;
+
+ AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName()));
+ AliDebug(2,Form(" fInit %i\n", int(fInit)));
+ AliDebug(2,Form(" fFirstEvent %i\n", fFirstEvent));
+ AliDebug(2,Form(" fLastEvent %i\n", fLastEvent));
+ AliDebug(2,Form(" Writing SDigits to branch with title %s\n", fEventFolderName.Data()));
+ AliDebug(2,Form(" with digitization parameters A = %f\n", fA));
+ AliDebug(2,Form(" B = %f\n", fB));
+ AliDebug(2,Form(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold));
+ AliDebug(2,Form(" Sampling = %f\n", fSampling));
+ AliDebug(2,Form("---------------------------------------------------\n"));
+
return ;
}
TClonesArray * hits = emcalLoader->Hits() ;
TClonesArray * sdigits = emcalLoader->SDigits() ;
sdigits->Clear();
+
Int_t nSdigits = 0 ;
- //Now make SDigits from hits, for EMCAL it is the same, so just copy
- Int_t nPrim = static_cast<Int_t>((emcalLoader->TreeH())->GetEntries()) ;
- // This is not true: there is only one list of hits (MvL jan 2006)
- // Attention nPrim is the number of primaries tracked by Geant
- // and this number could be different to the number of Primaries in TreeK;
- Int_t iprim ;
- for ( iprim = 0 ; iprim < nPrim ; iprim++ ) {
- //=========== Get the EMCAL branch from Hits Tree for the Primary iprim
- rl->Stack()->Particle(iprim) ;
- Int_t i;
- AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
- for ( i = 0 ; i < hits->GetEntries() ; i++ ) {
- AliEMCALHit * hit = dynamic_cast<AliEMCALHit*>(hits->At(i)) ;
- AliEMCALDigit * curSDigit = 0 ;
- AliEMCALDigit * sdigit = 0 ;
- Bool_t newsdigit = kTRUE;
-
- // hit->GetId() - Absolute Id number EMCAL segment
- if(geom->CheckAbsCellId(hit->GetId())) { // was IsInECA(hit->GetId())
- energy = hit->GetEnergy() * fSampling; // 23-nov-04
- if(energy > fECPrimThreshold )
- // Assign primary number only if deposited energy is significant
- curSDigit = new AliEMCALDigit( hit->GetPrimary(),
- hit->GetIparent(), hit->GetId(),
- Digitize(energy), hit->GetTime() ) ;
+ Int_t i;
+ AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
+ for ( i = 0 ; i < hits->GetEntries() ; i++ ) {
+ AliEMCALHit * hit = dynamic_cast<AliEMCALHit*>(hits->At(i)) ;
+ AliEMCALDigit * curSDigit = 0 ;
+ AliEMCALDigit * sdigit = 0 ;
+ Bool_t newsdigit = kTRUE;
+
+ // hit->GetId() - Absolute Id number EMCAL segment
+ if(geom->CheckAbsCellId(hit->GetId())) { // was IsInECA(hit->GetId())
+ energy = hit->GetEnergy() * fSampling; // 23-nov-04
+ if(energy > fECPrimThreshold )
+ // Assign primary number only if deposited energy is significant
+ curSDigit = new AliEMCALDigit( hit->GetPrimary(),
+ hit->GetIparent(), hit->GetId(),
+ Digitize(energy), hit->GetTime(),
+ -1, energy ) ;
else
curSDigit = new AliEMCALDigit( -1 ,
-1 ,
hit->GetId(),
- Digitize(energy), hit->GetTime() ) ;
- } else {
- Warning("Exec"," abs id %i is bad \n", hit->GetId());
- newsdigit = kFALSE;
- curSDigit = 0;
- }
-
- if(curSDigit != 0){
- for(Int_t check= 0; check < nSdigits ; check++) {
- sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(check)) ;
-
- if( sdigit->GetId() == curSDigit->GetId()) { // Are we in the same ECAL tower ?
- *sdigit = *sdigit + *curSDigit;
- newsdigit = kFALSE;
- }
+ Digitize(energy), hit->GetTime(),
+ -1, energy ) ;
+ } else {
+ Warning("Exec"," abs id %i is bad \n", hit->GetId());
+ newsdigit = kFALSE;
+ curSDigit = 0;
+ }
+
+ if(curSDigit != 0){
+ for(Int_t check= 0; check < nSdigits ; check++) {
+ sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(check)) ;
+
+ if( sdigit->GetId() == curSDigit->GetId()) { // Are we in the same ECAL tower ?
+ *sdigit = *sdigit + *curSDigit;
+ newsdigit = kFALSE;
}
}
- if (newsdigit) {
- new((*sdigits)[nSdigits]) AliEMCALDigit(*curSDigit);
- nSdigits++ ;
- }
- delete curSDigit ;
- } // loop over all hits (hit = deposited energy/entering particle)
- } // loop over iprim
+ }
+ if (newsdigit) {
+ new((*sdigits)[nSdigits]) AliEMCALDigit(*curSDigit);
+ nSdigits++ ;
+ }
+ delete curSDigit ;
+ } // loop over all hits (hit = deposited energy/entering particle)
sdigits->Sort() ;
nSdigits = sdigits->GetEntriesFast() ;
fSDigitsInRun += nSdigits ;
- Int_t nPrimarymax = -1 ;
- Int_t i ;
- Double_t e=0.,esum=0.;
- AliEMCALHistoUtilities::FillH1(fHists, 0, double(sdigits->GetEntriesFast()));
for (i = 0 ; i < sdigits->GetEntriesFast() ; i++) {
AliEMCALDigit * sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(i)) ;
sdigit->SetIndexInList(i) ;
-
- AliEMCALHistoUtilities::FillH1(fHists, 2, double(sdigit->GetAmp()));
- e = double(Calibrate(sdigit->GetAmp()));
- esum += e;
- AliEMCALHistoUtilities::FillH1(fHists, 3, e);
- AliEMCALHistoUtilities::FillH1(fHists, 4, double(sdigit->GetId()));
}
- if(esum>0.) AliEMCALHistoUtilities::FillH1(fHists, 1, esum);
- for (i = 0 ; i < sdigits->GetEntriesFast() ; i++) { // for what
- if (((dynamic_cast<AliEMCALDigit *>(sdigits->At(i)))->GetNprimary()) > nPrimarymax)
- nPrimarymax = ((dynamic_cast<AliEMCALDigit *>(sdigits->At(i)))->GetNprimary()) ;
- }
-
// Now write SDigits
-
+
Int_t bufferSize = 32000 ;
TBranch * sdigitsBranch = treeS->GetBranch("EMCAL");
if (sdigitsBranch)
sdigitsBranch->SetAddress(&sdigits);
else
treeS->Branch("EMCAL",&sdigits,bufferSize);
-
+
treeS->Fill();
emcalLoader->WriteSDigits("OVERWRITE");
if(strstr(option,"deb"))
PrintSDigits(option) ;
}
-
+
Unload();
emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
if(strstr(option,"tim")){
gBenchmark->Stop("EMCALSDigitizer");
printf("\n Exec: took %f seconds for SDigitizing %f seconds per event\n",
- gBenchmark->GetCpuTime("EMCALSDigitizer"), gBenchmark->GetCpuTime("EMCALSDigitizer")/nEvents ) ;
+ gBenchmark->GetCpuTime("EMCALSDigitizer"), gBenchmark->GetCpuTime("EMCALSDigitizer")/nEvents ) ;
}
}
+//__________________________________________________________________
+Int_t AliEMCALSDigitizer::Digitize(Float_t energy)const {
+ // Digitize the energy
+ //
+ //JLK 26-Jun-2008 EXPLANATION LONG OVERDUE:
+ //
+ //We have to digitize the SDigit energy so that it can be stored in
+ //AliEMCALDigit, which has only an ADC amplitude member and
+ //(rightly) no energy member. This method converts the energy to an
+ //integer which can be re-converted back to an energy with the
+ //Calibrate(energy) method when it is time to create Digits from SDigits
+ //
+ Double_t aSignal = fA + energy*fB;
+ if (TMath::Abs(aSignal)>2147483647.0) {
+ //PH 2147483647 is the max. integer
+ //PH This apparently is a problem which needs investigation
+ AliWarning(Form("Too big or too small energy %f",aSignal));
+ aSignal = TMath::Sign((Double_t)2147483647,aSignal);
+ }
+ return (Int_t ) aSignal;
+}
+
+//__________________________________________________________________
+Float_t AliEMCALSDigitizer::Calibrate(Int_t amp)const {
+ //
+ // Convert the amplitude back to energy in GeV
+ //
+ //JLK 26-Jun-2008 EXPLANATION LONG OVERDUE:
+ //
+ //We have to digitize the SDigit energy with the method Digitize()
+ //so that it can be stored in AliEMCALDigit, which has only an ADC
+ //amplitude member and (rightly) no energy member. This method is
+ //just the reverse of Digitize(): it converts the stored amplitude
+ //back to an energy value in GeV so that the SDigit energies can be
+ //summed before adding noise and creating digits out of them
+ //
+ return (Float_t)(amp - fA)/fB;
+
+}
+
+//__________________________________________________________________
void AliEMCALSDigitizer::Print1(Option_t * option)
{
Print();
void AliEMCALSDigitizer::Print(Option_t *option) const
{
// Prints parameters of SDigitizer
- printf("Print: \n------------------- %s -------------\n", GetName() ) ;
+ printf("Print: \n------------------- %s ------------- option %s\n", GetName() , option) ;
printf(" fInit %i\n", int(fInit));
printf(" fFirstEvent %i\n", fFirstEvent);
printf(" fLastEvent %i\n", fLastEvent);
void AliEMCALSDigitizer::PrintSDigits(Option_t * option)
{
//Prints list of digits produced at the current pass of AliEMCALDigitizer
-
-
- // AliEMCALGetter * gime = AliEMCALGetter::Instance() ;
+
AliEMCALLoader *rl = dynamic_cast<AliEMCALLoader*>(AliRunLoader::GetRunLoader()->GetDetectorLoader("EMCAL"));
const TClonesArray * sdigits = rl->SDigits() ;
}
}
delete tempo ;
- printf("\n** Sum %i : %10.3f GeV/c **\n ", isum, double(isum)*1.e-6);
+ printf("\n** Sum %i : %10.3f GeV/c **\n ", isum, Calibrate(isum));
} else printf("\n");
}
rl->UnloadSDigits() ;
}
+//____________________________________________________________________________
void AliEMCALSDigitizer::Browse(TBrowser* b)
{
- if(fHists) b->Add(fHists);
TTask::Browse(b);
}
-
-TList *AliEMCALSDigitizer::BookControlHists(int var)
-{ // 22-nov-04
- gROOT->cd();
- const AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance() ;
- if(var>=1){
- new TH1F("HSDigiN", "#EMCAL sdigits ", 1001, -0.5, 1000.5);
- new TH1F("HSDigiSumEnergy","Sum.EMCAL energy", 1000, 0.0, 100.);
- new TH1F("HSDigiAmp", "EMCAL sdigits amplitude", 1000, 0., 2.e+9);
- new TH1F("HSDigiEnergy","EMCAL cell energy", 1000, 0.0, 100.);
- new TH1F("HSDigiAbsId","EMCAL absID for sdigits",
- geom->GetNCells(), 0.5, Double_t(geom->GetNCells())+0.5);
- }
- fHists = AliEMCALHistoUtilities::MoveHistsToList("EmcalSDigiControlHists", kFALSE);
- fHists = 0;
- return fHists;
-}
-
-void AliEMCALSDigitizer::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