* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
-//_________________________________________________________________________
-// This is a class that constructs ReconstParticles (reconstructed particles)
-// out of Digits
-//
+/* $Id$ */
+/** @file AliFMDReconstructor.cxx
+ @author Christian Holm Christensen <cholm@nbi.dk>
+ @date Mon Mar 27 12:47:09 2006
+ @brief FMD reconstruction
+*/
+//____________________________________________________________________
+//
+// This is a class that constructs AliFMDRecPoint objects from of Digits
+// This class reads either digits from a TClonesArray or raw data from
+// a DDL file (or similar), and stores the read ADC counts in an
+// internal cache (fAdcs). The rec-points are made via the naiive
+// method.
+//
//-- Authors: Evgeny Karpechev(INR) and Alla Maevsksia
-//////////////////////////////////////////////////////////////////////////////
-
-// --- ROOT system ---
-#include "TTask.h"
-#include "TTree.h"
-#include "TSystem.h"
-#include "TFile.h"
-#include "TROOT.h"
-#include "TFolder.h"
-#include "TH2F.h"
-
-// --- Standard library ---
-#include <stdlib.h>
-#include <Riostream.h>
-
-// --- AliRoot header files ---
-
-#include "AliRunLoader.h"
-#include "AliLoader.h"
-
-#include "AliFMDdigit.h"
-#include "AliFMDhit.h"
-#include "AliFMDReconstParticles.h"
-#include "AliFMD.h"
-#include "AliFMDv1.h"
-#include "AliFMDReconstructor.h"
-#include "AliRun.h"
-#include "AliConfig.h"
-#include "AliHeader.h"
-#include "AliGenEventHeader.h"
+// Latest changes by Christian Holm Christensen <cholm@nbi.dk>
+//
+//
+//____________________________________________________________________
+
+// #include <AliLog.h> // ALILOG_H
+// #include <AliRun.h> // ALIRUN_H
+#include "AliFMDDebug.h"
+#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
+#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
+#include "AliFMDDigit.h" // ALIFMDDIGIT_H
+#include "AliFMDReconstructor.h" // ALIFMDRECONSTRUCTOR_H
+#include "AliFMDRawReader.h" // ALIFMDRAWREADER_H
+#include "AliFMDRecPoint.h" // ALIFMDMULTNAIIVE_H
+#include "AliESDEvent.h" // ALIESDEVENT_H
+#include "AliESDVertex.h" // ALIESDVERTEX_H
+#include <AliESDFMD.h> // ALIESDFMD_H
+#include <TMath.h>
+#include <TH1.h>
+#include <TH2.h>
+#include <TFile.h>
+class AliRawReader;
+//____________________________________________________________________
ClassImp(AliFMDReconstructor)
+#if 0
+ ; // This is here to keep Emacs for indenting the next line
+#endif
-
-//____________________________________________________________________________
+//____________________________________________________________________
+AliFMDReconstructor::AliFMDReconstructor()
+ : AliReconstructor(),
+ fMult(0x0),
+ fNMult(0),
+ fTreeR(0x0),
+ fCurrentVertex(0),
+ fESDObj(0x0),
+ fNoiseFactor(0),
+ fAngleCorrect(kTRUE),
+ fVertexType(kNoVertex),
+ fESD(0x0),
+ fDiagnostics(kFALSE),
+ fDiagStep1(0),
+ fDiagStep2(0),
+ fDiagStep3(0),
+ fDiagStep4(0),
+ fDiagAll(0)
+{
+ // Make a new FMD reconstructor object - default CTOR.
+ SetNoiseFactor();
+ SetAngleCorrect();
+}
+
-void AliFMDReconstructor::Reconstruct(AliRunLoader* runLoader) const
-{
- //Collects all digits in the same active volume into number of particles
- /*
- Reconstruct number of particles
- in given group of pads for given FMDvolume
- determine by numberOfVolume ,
- numberOfMinSector,numberOfMaxSector,
- numberOfMinRing, numberOgMaxRing
- Reconstructor method choose dependence on number of empty pads
- */
+//____________________________________________________________________
+AliFMDReconstructor::AliFMDReconstructor(const AliFMDReconstructor& other)
+ : AliReconstructor(),
+ fMult(other.fMult),
+ fNMult(other.fNMult),
+ fTreeR(other.fTreeR),
+ fCurrentVertex(other.fCurrentVertex),
+ fESDObj(other.fESDObj),
+ fNoiseFactor(other.fNoiseFactor),
+ fAngleCorrect(other.fAngleCorrect),
+ fVertexType(other.fVertexType),
+ fESD(other.fESD),
+ fDiagnostics(other.fDiagnostics),
+ fDiagStep1(other.fDiagStep1),
+ fDiagStep2(other.fDiagStep2),
+ fDiagStep3(other.fDiagStep3),
+ fDiagStep4(other.fDiagStep4),
+ fDiagAll(other.fDiagAll)
+{
+ // Copy constructor
+}
+
+//____________________________________________________________________
+AliFMDReconstructor&
+AliFMDReconstructor::operator=(const AliFMDReconstructor& other)
+{
+ // Assignment operator
+ fMult = other.fMult;
+ fNMult = other.fNMult;
+ fTreeR = other.fTreeR;
+ fCurrentVertex = other.fCurrentVertex;
+ fESDObj = other.fESDObj;
+ fNoiseFactor = other.fNoiseFactor;
+ fAngleCorrect = other.fAngleCorrect;
+ fVertexType = other.fVertexType;
+ fESD = other.fESD;
+ fDiagnostics = other.fDiagnostics;
+ fDiagStep1 = other.fDiagStep1;
+ fDiagStep2 = other.fDiagStep2;
+ fDiagStep3 = other.fDiagStep3;
+ fDiagStep4 = other.fDiagStep4;
+ fDiagAll = other.fDiagAll;
+ return *this;
+}
-#ifdef DEBUG
- Info("Exec ","Start");
-#endif
+//____________________________________________________________________
+AliFMDReconstructor::~AliFMDReconstructor()
+{
+ // Destructor
+ if (fMult) fMult->Delete();
+ if (fMult) delete fMult;
+ if (fESDObj) delete fESDObj;
+}
- Int_t const knumVolumes=5;
- Int_t padADC;
- Float_t eta, etain,etaout,rad,theta;
- Int_t ivol, iSector, iRing;
- Float_t rin[5]={4.2,15.4,4.2,15.4,4.2};
- Float_t rout[5]={17.4,28.4,17.4,28.4,17.4};
- Float_t z[5]={-62.8, -75.2, 83.4, 75.2, 340.};
- Int_t numberOfRings[5]={512,256,512,256,512};
- Int_t numberOfSectors[5]= {20,40,20,40,20};
- Int_t numberOfEtaIntervals[5];
- // number of ring for boundary 0.1 eta
+//____________________________________________________________________
+void
+AliFMDReconstructor::Init()
+{
+ // Initialize the reconstructor
+ // Initialize the geometry
+ AliFMDGeometry* geom = AliFMDGeometry::Instance();
+ geom->Init();
+ geom->InitTransformations();
+
+ // Initialize the parameters
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ param->Init();
- if (runLoader == 0x0)
- {
- Error("Exec","Run Loader loader is NULL - Session not opened");
- return;
- }
-
- AliLoader* plFMD = runLoader->GetLoader("FMDLoader");
- if (plFMD == 0x0)
- {
- Fatal("AliFMDReconstructor","Can not find FMD (loader) in specified event");
- return;//never reached
- }
-
- if (!runLoader->GetAliRun()) runLoader->LoadgAlice();
- if (!runLoader->TreeE()) runLoader->LoadHeader();
-
- TDirectory* cwd = gDirectory;
- gDirectory = 0x0;
- Text_t buf1[20];
- TH2F* hTotal[10];
- for (Int_t j=1; j<=5; j++){
- sprintf(buf1,"hTotal%d",j);
-
- hTotal[j] = new TH2F(buf1," Number of primary particles ",
- numberOfSectors[j-1],1,numberOfSectors[j-1],
- numberOfRings[j-1],1,numberOfRings[j-1]);
- }
- gDirectory = cwd;
-
- plFMD->LoadRecPoints("RECREATE");
- Int_t retval=0;
- Int_t nevents=Int_t (runLoader->TreeE()->GetEntries());
-#ifdef DEBUG
- cout<<" nevents "<<nevents<<endl;
-#endif
- for(Int_t ievent=0;ievent<nevents;ievent++)
- {
-#ifdef DEBUG
- cout<<" *** event "<<ievent<<endl;
+ // Current vertex position
+ fCurrentVertex = 0;
+ // Create array of reconstructed strip multiplicities
+ fMult = new TClonesArray("AliFMDRecPoint", 51200);
+ // Create ESD output object
+ fESDObj = new AliESDFMD;
+
+ // Check if we need diagnostics histograms
+ if (!fDiagnostics) return;
+ fDiagStep1 = new TH2I("diagStep1", "Read ADC vs. Noise surpressed ADC",
+ 1024, -.5, 1023.5, 1024, -.5, 1023.5);
+ fDiagStep1->SetDirectory(0);
+ fDiagStep1->GetXaxis()->SetTitle("ADC (read)");
+ fDiagStep1->GetYaxis()->SetTitle(Form("ADC (noise surpressed %4.f)",
+ fNoiseFactor));
+ fDiagStep2 = new TH2F("diagStep2", "ADC vs Edep deduced",
+ 1024, -.5, 1023.5, 100, 0, 2);
+ fDiagStep2->SetDirectory(0);
+ fDiagStep2->GetXaxis()->SetTitle("ADC (noise surpressed)");
+ fDiagStep2->GetYaxis()->SetTitle("#Delta E [GeV]");
+ fDiagStep3 = new TH2F("diagStep3", "Edep vs Edep path corrected",
+ 100, 0., 2., 100, 0., 2.);
+ fDiagStep3->SetDirectory(0);
+ fDiagStep3->GetXaxis()->SetTitle("#Delta E [GeV]");
+ fDiagStep3->GetYaxis()->SetTitle("#Delta E/#Delta x #times #delta x [GeV]");
+ fDiagStep4 = new TH2F("diagStep4", "Edep vs Multiplicity deduced",
+ 100, 0., 2., 100, -.1, 19.9);
+ fDiagStep4->SetDirectory(0);
+ fDiagStep4->GetXaxis()->SetTitle("#Delta E/#Delta x #times #delta x [GeV]");
+ fDiagStep4->GetYaxis()->SetTitle("Multiplicity");
+ fDiagAll = new TH2F("diagAll", "Read ADC vs Multiplicity deduced",
+ 1024, -.5, 1023.5, 100, -.1, 19.9);
+ fDiagAll->SetDirectory(0);
+ fDiagAll->GetXaxis()->SetTitle("ADC (read)");
+ fDiagAll->GetYaxis()->SetTitle("Multiplicity");
+}
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::ConvertDigits(AliRawReader* reader,
+ TTree* digitsTree) const
+{
+ // Convert Raw digits to AliFMDDigit's in a tree
+ AliFMDDebug(2, ("Reading raw data into digits tree"));
+ AliFMDRawReader rawRead(reader, digitsTree);
+ // rawRead.SetSampleRate(fFMD->GetSampleRate());
+ rawRead.Exec();
+}
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::GetVertex() const
+{
+ // Return the vertex to use.
+ // This is obtained from the ESD object.
+ // If not found, a warning is issued.
+ fVertexType = kNoVertex;
+ fCurrentVertex = 0;
+ if (fESD) {
+ const AliESDVertex* vertex = fESD->GetVertex();
+ if (vertex) {
+ AliFMDDebug(2, ("Got vertex from ESD: %f", vertex->GetZv()));
+ fCurrentVertex = vertex->GetZv();
+ fVertexType = kESDVertex;
+ return;
+ }
+ }
+ AliWarning("Didn't get any vertex from ESD or generator");
+}
+
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::Reconstruct(AliRawReader* /*reader*/, TTree*) const
+{
+ // Reconstruct directly from raw data (no intermediate output on
+ // digit tree or rec point tree).
+ // Parameters:
+ // reader Raw event reader
+ // ctree Not used.
+ AliError("Method is not used");
+#if 0
+ TClonesArray* array = new TClonesArray("AliFMDDigit");
+ AliFMDRawReader rawRead(reader, 0);
+ rawRead.ReadAdcs(array);
+ ProcessDigits(array);
+ array->Delete();
+ delete array;
#endif
- runLoader->GetEvent(ievent) ;
- //event z-vertex for correction eta-rad dependence
- AliHeader *header = runLoader->GetHeader();
- AliGenEventHeader* genHeader = header->GenEventHeader();
- TArrayF *o = new TArrayF(3);
- genHeader->PrimaryVertex(*o);
- Float_t zVertex=o->At(2);
-
- for (Int_t i=0; i<5; i++)
- hTotal[i+1]->Reset();
-
- retval = plFMD->LoadDigits("READ");
- if (retval)
- {
- Error("Exec","Error occured while loading digits. Exiting.");
- return;
- }
-
- AliFMD * fFMD = (AliFMD *)gAlice->GetDetector("FMD");
- TClonesArray *fReconParticles=fFMD->ReconParticles();
- TClonesArray *fDigits=fFMD->Digits();
+}
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::Reconstruct(TTree* digitsTree,
+ TTree* clusterTree) const
+{
+ // Reconstruct event from digits in tree
+ // Get the FMD branch holding the digits.
+ // FIXME: The vertex may not be known yet, so we may have to move
+ // some of this to FillESD.
+ AliFMDDebug(2, ("Reconstructing from digits in a tree"));
+ GetVertex();
+
+ TBranch *digitBranch = digitsTree->GetBranch("FMD");
+ if (!digitBranch) {
+ Error("Exec", "No digit branch for the FMD found");
+ return;
+ }
+ TClonesArray* digits = new TClonesArray("AliFMDDigit");
+ digitBranch->SetAddress(&digits);
+
+ if (fMult) fMult->Clear();
+ if (fESDObj) fESDObj->Clear();
+
+ fNMult = 0;
+ fTreeR = clusterTree;
+ fTreeR->Branch("FMD", &fMult);
+
+ AliFMDDebug(5, ("Getting entry 0 from digit branch"));
+ digitBranch->GetEntry(0);
+
+ AliFMDDebug(5, ("Processing digits"));
+ ProcessDigits(digits);
+
+ Int_t written = clusterTree->Fill();
+ AliFMDDebug(10, ("Filled %d bytes into cluster tree", written));
+ digits->Delete();
+ delete digits;
+}
- TTree* treeD = plFMD->TreeD();
- if (treeD == 0x0)
- {
- Error("Exec","Can not get Tree with Digits. Nothing to reconstruct - Exiting");
- return;
- }
-
- TBranch *brDigits=0;
-
- brDigits=treeD->GetBranch("FMD");
-
- if (brDigits) {
- brDigits->SetAddress(&fDigits);
- }else{
- cerr<<"EXEC Branch FMD digits not found"<<endl;
- return;
- }
-
- if(plFMD->TreeR()==0) plFMD->MakeTree("R");
-
- //Make branches
- fFMD->MakeBranch("R");
-
- Int_t zeroADC=6;
- // read Digits
- AliFMDdigit *fmdDigit;
- if (fFMD)
- {
- plFMD->TreeD()->GetEvent(0);
-
- Int_t nDigits=fDigits->GetEntries();
- Int_t recParticles[6];
- Int_t nRecPart=0 ;
- Int_t zeroPads=0;
- Int_t numberOfPads=0;
- Int_t pedestal;
- Float_t channelWidth=(22400*50)/1024;
- for (Int_t digit=0;digit<nDigits;digit++)
- {
- fmdDigit=(AliFMDdigit*)fDigits->UncheckedAt(digit);
- ivol=fmdDigit->Volume();
- iSector=fmdDigit->NumberOfSector();
- iRing=fmdDigit->NumberOfRing();
- pedestal=Int_t(gRandom->Gaus(500,250));
- padADC= fmdDigit->ADCsignal()
- -Int_t(Float_t(pedestal)/channelWidth);
- if (padADC<0) padADC=0;
- hTotal[ivol]->Fill(iSector,iRing,padADC);
- } //digit loop
-
- //reconstruct multiplicity in 0.1 eta according Poisson distribution
-
- Int_t rmin=0; Int_t rmax=0;
- Int_t smin=0; Int_t smax=0;
- for (ivol=0; ivol<knumVolumes; ivol++)
- {
- Float_t ring2number=Float_t (numberOfRings[ivol])/
- (rout[ivol]-rin[ivol]);
- Float_t realZ=zVertex+z[ivol];
- theta=TMath::ATan(rout[ivol]/TMath::Abs(realZ));
- etain = - TMath::Log( TMath::Tan(theta/2.));
- theta=TMath::ATan(rin[ivol]/TMath::Abs(realZ));
- etaout=- TMath::Log( TMath::Tan(theta/2.));
- numberOfEtaIntervals[ivol]=Int_t((etaout-etain)*10)-1;
- eta=etain;
- for (Int_t e1=0;e1<=numberOfEtaIntervals[ivol];e1++)
- {
- theta = 2.*TMath::ATan (TMath::Exp (-eta));
- Float_t radmin = TMath::Abs(realZ) * (TMath::Tan (theta));
- rmax= Int_t ( (radmin-rin[ivol])*ring2number+0.5);
- eta=eta+0.1;
- theta = 2.*TMath::ATan (TMath::Exp (-eta));
- rad = TMath::Abs(realZ) * (TMath::Tan (theta));
- rmin=Int_t( (rad-rin[ivol])*ring2number+0.5);
-
- zeroPads=0;
- smin=0;
- smax=numberOfSectors[ivol];
- numberOfPads=(rmax-rmin)*(smax-smin);
- for (Int_t iring=rmin; iring<rmax; iring++)
- {
- for
- (Int_t isector=0;
- isector<numberOfSectors[ivol];
- isector++)
- {
- if(hTotal[ivol+1]->GetBinContent(isector+1,iring+1)
- <zeroADC) zeroPads++;}
-
- } //ring
- Float_t numberOfPads=Float_t(smax-smin)*Float_t(rmax-rmin);
-
- Double_t lambda=-TMath::Log(Double_t(zeroPads)/numberOfPads);
- Int_t fRecon=Int_t (lambda*numberOfPads+0.5);
- recParticles[0]=ivol+1;
- recParticles[1]=smin;
- recParticles[2]=smax;
- recParticles[3]=rmin;
- recParticles[4]=rmax;
- recParticles[5]= fRecon;
- new((*fReconParticles)[nRecPart++]) AliFMDReconstParticles(recParticles);
-
-
- } // eta
- } // volume
-
- }//if FMD
- plFMD->TreeR()->Reset();
- plFMD->TreeR()->Fill();
- plFMD->WriteRecPoints("OVERWRITE");
- plFMD->UnloadDigits();
- } //event loop
- plFMD->UnloadRecPoints();
-#ifdef DEBUG
- Info(" Exec"," finished");
-#endif
- // delete hTotal[10];
+//____________________________________________________________________
+void
+AliFMDReconstructor::ProcessDigits(TClonesArray* digits) const
+{
+ // For each digit, find the pseudo rapdity, azimuthal angle, and
+ // number of corrected ADC counts, and pass it on to the algorithms
+ // used.
+ Int_t nDigits = digits->GetEntries();
+ AliFMDDebug(1, ("Got %d digits", nDigits));
+ fESDObj->SetNoiseFactor(fNoiseFactor);
+ fESDObj->SetAngleCorrected(fAngleCorrect);
+ for (Int_t i = 0; i < nDigits; i++) {
+ AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i));
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ // Check that the strip is not marked as dead
+ if (param->IsDead(digit->Detector(), digit->Ring(),
+ digit->Sector(), digit->Strip())) {
+ AliFMDDebug(10, ("FMD%d%c[%2d,%3d] is dead", digit->Detector(),
+ digit->Ring(), digit->Sector(), digit->Strip()));
+ continue;
+ }
+
+ // digit->Print();
+ // Get eta and phi
+ Float_t eta, phi;
+ PhysicalCoordinates(digit, eta, phi);
+
+ // Substract pedestal.
+ UShort_t counts = SubtractPedestal(digit);
+
+ // Gain match digits.
+ Double_t edep = Adc2Energy(digit, eta, counts);
+
+ // Make rough multiplicity
+ Double_t mult = Energy2Multiplicity(digit, edep);
+
+ AliFMDDebug(10, ("FMD%d%c[%2d,%3d]: "
+ "ADC: %d, Counts: %d, Energy: %f, Mult: %f",
+ digit->Detector(), digit->Ring(), digit->Sector(),
+ digit->Strip(), digit->Counts(), counts, edep, mult));
+
+ // Create a `RecPoint' on the output branch.
+ if (fMult) {
+ AliFMDRecPoint* m =
+ new ((*fMult)[fNMult]) AliFMDRecPoint(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip(),
+ eta, phi,
+ edep, mult);
+ (void)m; // Suppress warnings about unused variables.
+ fNMult++;
+ }
+
+ fESDObj->SetMultiplicity(digit->Detector(), digit->Ring(),
+ digit->Sector(), digit->Strip(), mult);
+ fESDObj->SetEta(digit->Detector(), digit->Ring(),
+ digit->Sector(), digit->Strip(), eta);
+
+ if (fDiagAll) fDiagAll->Fill(digit->Counts(), mult);
+ }
+}
+//____________________________________________________________________
+UShort_t
+AliFMDReconstructor::SubtractPedestal(AliFMDDigit* digit) const
+{
+ // Member function to subtract the pedestal from a digit
+ // This implementation does nothing, but a derived class could over
+ // load this to subtract a pedestal that was given in a database or
+ // something like that.
+
+ Int_t counts = 0;
+ Int_t adc = 0;
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Float_t ped = param->GetPedestal(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ Float_t noise = param->GetPedestalWidth(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ AliFMDDebug(15, ("Subtracting pedestal %f from signal %d",
+ ped, digit->Counts()));
+ if (digit->Count3() > 0) adc = digit->Count3();
+ else if (digit->Count2() > 0) adc = digit->Count2();
+ else adc = digit->Count1();
+ counts = TMath::Max(Int_t(adc - ped), 0);
+ if (counts < noise * fNoiseFactor) counts = 0;
+ if (counts > 0) AliFMDDebug(15, ("Got a hit strip"));
+ if (fDiagStep1) fDiagStep1->Fill(adc, counts);
+
+ return UShort_t(counts);
+}
+
+//____________________________________________________________________
+Float_t
+AliFMDReconstructor::Adc2Energy(AliFMDDigit* digit,
+ Float_t eta,
+ UShort_t count) const
+{
+ // Converts number of ADC counts to energy deposited.
+ // Note, that this member function can be overloaded by derived
+ // classes to do strip-specific look-ups in databases or the like,
+ // to find the proper gain for a strip.
+ //
+ // In this simple version, we calculate the energy deposited as
+ //
+ // EnergyDeposited = cos(theta) * gain * count
+ //
+ // where
+ //
+ // Pre_amp_MIP_Range
+ // gain = ----------------- * Energy_deposited_per_MIP
+ // ADC_channel_size
+ //
+ // is constant and the same for all strips.
+ if (count <= 0) return 0;
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Float_t gain = param->GetPulseGain(digit->Detector(),
+ digit->Ring(),
+ digit->Sector(),
+ digit->Strip());
+ AliFMDDebug(15, ("Converting counts %d to energy via factor %f",
+ count, gain));
+
+ Double_t edep = count * gain;
+ if (fDiagStep2) fDiagStep2->Fill(count, edep);
+ if (fAngleCorrect) {
+ Double_t theta = 2 * TMath::ATan(TMath::Exp(-eta));
+ Double_t corr = TMath::Abs(TMath::Cos(theta));
+ Double_t cedep = corr * edep;
+ AliFMDDebug(10, ("correcting for path %f * %f = %f (eta=%f, theta=%f)",
+ edep, corr, cedep, eta, theta));
+ if (fDiagStep3) fDiagStep3->Fill(edep, cedep);
+ edep = cedep;
+ }
+ return edep;
}
+//____________________________________________________________________
+Float_t
+AliFMDReconstructor::Energy2Multiplicity(AliFMDDigit* /* digit */,
+ Float_t edep) const
+{
+ // Converts an energy signal to number of particles.
+ // Note, that this member function can be overloaded by derived
+ // classes to do strip-specific look-ups in databases or the like,
+ // to find the proper gain for a strip.
+ //
+ // In this simple version, we calculate the multiplicity as
+ //
+ // multiplicity = Energy_deposited / Energy_deposited_per_MIP
+ //
+ // where
+ //
+ // Energy_deposited_per_MIP = 1.664 * SI_density * SI_thickness
+ //
+ // is constant and the same for all strips
+ AliFMDParameters* param = AliFMDParameters::Instance();
+ Double_t edepMIP = param->GetEdepMip();
+ Float_t mult = edep / edepMIP;
+ if (edep > 0)
+ AliFMDDebug(15, ("Translating energy %f to multiplicity via "
+ "divider %f->%f", edep, edepMIP, mult));
+ if (fDiagStep4) fDiagStep4->Fill(edep, mult);
+ return mult;
+}
-//_____________________________________________________________________________
-void AliFMDReconstructor::FillESD(AliRunLoader* /*runLoader*/,
- AliESD* /*esd*/) const
+//____________________________________________________________________
+void
+AliFMDReconstructor::PhysicalCoordinates(AliFMDDigit* digit,
+ Float_t& eta,
+ Float_t& phi) const
{
-// nothing to be done
+ // Get the eta and phi of a digit
+ //
+ // Get geometry.
+ AliFMDGeometry* geom = AliFMDGeometry::Instance();
+ Double_t x, y, z, r, theta;
+ geom->Detector2XYZ(digit->Detector(), digit->Ring(), digit->Sector(),
+ digit->Strip(), x, y, z);
+ // Correct for vertex offset.
+ z += fCurrentVertex;
+ phi = TMath::ATan2(y, x);
+ r = TMath::Sqrt(y * y + x * x);
+ theta = TMath::ATan2(r, z);
+ eta = -TMath::Log(TMath::Tan(theta / 2));
+}
+
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(TTree* /* digitsTree */,
+ TTree* /* clusterTree */,
+ AliESDEvent* esd) const
+{
+ // nothing to be done
+ // FIXME: The vertex may not be known when Reconstruct is executed,
+ // so we may have to move some of that member function here.
+ AliFMDDebug(2, ("Calling FillESD with two trees and one ESD"));
+ // fESDObj->Print();
+
+ if (esd) {
+ AliFMDDebug(2, ("Writing FMD data to ESD tree"));
+ esd->SetFMDData(fESDObj);
+ }
+
+ if (!fDiagnostics || !esd) return;
+ static bool first = true;
+ // This is most likely NOT the event number you'd like to use. It
+ // has nothing to do with the 'real' event number.
+ // - That's OK. We just use it for the name of the directory -
+ // nothing else. Christian
+ Int_t evno = esd->GetEventNumberInFile();
+ AliFMDDebug(1, ("Writing diagnostics histograms to FMD.Diag.root/%03d",evno));
+ TFile f("FMD.Diag.root", (first ? "RECREATE" : "UPDATE"));
+ first = false;
+ f.cd();
+ TDirectory* d = f.mkdir(Form("%03d", evno),
+ Form("Diagnostics histograms for event # %d", evno));
+ d->cd();
+ if (fDiagStep1) fDiagStep1->Write();
+ if (fDiagStep2) fDiagStep2->Write();
+ if (fDiagStep3) fDiagStep3->Write();
+ if (fDiagStep4) fDiagStep4->Write();
+ if (fDiagAll) fDiagAll->Write();
+ d->Write();
+ f.Write();
+ f.Close();
+
+ if (fDiagStep1) fDiagStep1->Reset();
+ if (fDiagStep2) fDiagStep2->Reset();
+ if (fDiagStep3) fDiagStep3->Reset();
+ if (fDiagStep4) fDiagStep4->Reset();
+ if (fDiagAll) fDiagAll->Reset();
+}
+
+//____________________________________________________________________
+void
+AliFMDReconstructor::FillESD(AliRawReader*, TTree* clusterTree,
+ AliESDEvent* esd) const
+{
+ TTree* dummy = 0;
+ FillESD(dummy, clusterTree, esd);
}
+//____________________________________________________________________
+//
+// EOF
+//
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff