// AliRICHRecon //
// //
// RICH class to perfom pattern recognition based on Hough transfrom //
-// //
+// for single chamber //
//////////////////////////////////////////////////////////////////////////
-
-#include "AliRICH.h"
-#include "AliRICHRecon.h"
-#include "AliRICHParam.h"
-#include "AliRICHChamber.h"
-#include <AliLoader.h>
-#include <AliRun.h>
-#include <AliStack.h>
-#include <Riostream.h>
-#include <TParticle.h>
-#include <TH2.h>
-#include <TMath.h>
-#include <TRandom.h>
-#include <TMinuit.h>
-#include <TNtuple.h>
+#include "AliRICHRecon.h" //class header
#include <TMath.h>
#include <TRotation.h>
#include <TVector3.h>
-#include <TCanvas.h>
-
-#define NPointsOfRing 201
-
-TMinuit *gAliRICHminuit ;
-
-void fcnrecon(Int_t &npar, Double_t *gin, Double_t &f, Double_t *par, Int_t iflag);
-//__________________________________________________________________________________________________
-AliRICHRecon::AliRICHRecon(const char*name, const char*title)
- :TTask(name,title)
-{
- // main ctor
- fThetaBin=750; fThetaMin = 0.0; fThetaMax = 0.75;
- fDTheta = 0.001; fWindowWidth = 0.060;
- fNpadX = AliRICHParam::NpadsY();
- fNpadY = AliRICHParam::NpadsX();
- fPadSizeX = AliRICHParam::PadSizeY();
- fPadSizeY = AliRICHParam::PadSizeX();
- fRadiatorWidth = AliRICHParam::FreonThickness();
- fQuartzWidth = AliRICHParam::QuartzThickness();
- fGapWidth = AliRICHParam::RadiatorToPads();
- fXmin = -AliRICHParam::PcSizeY()/2.;
- fXmax = AliRICHParam::PcSizeY()/2.;
- fYmin = -AliRICHParam::PcSizeX()/2.;
- fYmax = AliRICHParam::PcSizeX()/2.;
- fRich = (AliRICH*)gAlice->GetDetector("RICH");
- fOutFile=new TFile("Anal.root","RECREATE","My Analysis histos");
- if(fIsDISPLAY) fDisplay = new TCanvas("Display","RICH Display",0,0,1200,750);
- fNtuple=new TNtuple("hn","ntuple",
-"Run:Trig:VertZ:Pmod:Pt:Eta:TrackTheta:TrackPhi:TrackThetaFit:TrackPhiFit:Charge::NPhotons:NPhotonsFit:InRing:MassOfParticle:HoughArea:Multiplicity:TPCLastZ");
-}
-//__________________________________________________________________________________________________
-void AliRICHRecon::StartProcessEvent()
-{
- //start to process for pattern recognition
-
- Float_t trackThetaStored = 0;
- Float_t trackPhiStored = 0;
- Float_t thetaCerenkovStored = 0;
- Int_t houghPhotonsStored = 0;
-
- SetFreonScaleFactor(0.994);
-
- if(fIsDISPLAY)
- {
- DrawEvent(0);
-// Waiting();
- }
-
- Rich()->GetLoader()->LoadHits();
- Rich()->GetLoader()->LoadRecPoints();
- Rich()->GetLoader()->LoadDigits();
- gAlice->GetRunLoader()->LoadHeader();
- gAlice->GetRunLoader()->LoadKinematics();
-
- Rich()->GetLoader()->TreeR()->GetEntry(0);
-
- Float_t clusX[7][500],clusY[7][500];
- Int_t clusQ[7][500],clusMul[7][500];
- Int_t nClusters[7];
-
- for (Int_t ich=0;ich<7;ich++) {
- nClusters[ich] = Rich()->Clusters(ich+1)->GetEntries();
- for(Int_t k=0;k<nClusters[ich];k++) {
- AliRICHcluster *pCluster = (AliRICHcluster *)Rich()->Clusters(ich+1)->At(k);
- clusX[ich][k] = pCluster->X();
- clusY[ich][k] = pCluster->Y();
- clusQ[ich][k] = pCluster->Q();
- clusMul[ich][k] = pCluster->Size();
-// pCluster->Print();
- }
- }
-
- Int_t nPrimaries = (Int_t)Rich()->GetLoader()->TreeH()->GetEntries();
-
- cout << " N. primaries " << nPrimaries << endl;
-
- for(Int_t i=0;i<nPrimaries;i++){
-
- Rich()->GetLoader()->TreeH()->GetEntry(i);
-
-// Rich()->Hits()->Print();
- Int_t iPrim = 0;
-
- AliRICHhit* pHit=0;
-
- for(Int_t j=0;j<Rich()->Hits()->GetEntries();j++) {
+#include <TH1F.h>
- pHit = (AliRICHhit*)Rich()->Hits()->At(j);
- if(pHit->GetTrack() < nPrimaries) break;
- iPrim++;
- }
-
- cout << " iPrim " << iPrim << " pHit " << pHit << endl;
-
- if (!pHit) return;
-
-// pHit->Print();
-
- TParticle *pParticle = gAlice->GetRunLoader()->Stack()->Particle(pHit->GetTrack());
- Float_t pmod = pParticle->P();
- Float_t pt = pParticle->Pt();
- Float_t trackEta = pParticle->Eta();
- Int_t q = (Int_t)TMath::Sign(1.,pParticle->GetPDG()->Charge());
-
-// pParticle->Print();
-
- cout << " pmod " << pmod << " pt " << pt << " Eta " << trackEta << " charge " << q << endl;
-
- SetTrackMomentum(pmod);
- SetTrackPt(pt);
- SetTrackEta(trackEta);
- SetTrackCharge(q);
-
- TVector3 pLocal(0,0,0);//?????
-
- TVector2 primLocal =Rich()->C(pHit->C())->Glob2Loc(pHit->InX3());
-
-// Float_t pmodFreo = pLocal.Mag();
- Float_t trackTheta = pLocal.Theta();
- Float_t trackPhi = pLocal.Phi();
-
-// cout << " trackTheta " << trackTheta << " trackPhi " << trackPhi << endl;
-
- SetTrackTheta(trackTheta);
- SetTrackPhi(trackPhi);
-
- Int_t maxInd = 0;
- Float_t minDist = 999.;
-
-// cout << " n Clusters " << nClusters[pHit->Chamber()-1] << " for chamber n. " << pHit->Chamber() << endl;
-
- for(Int_t j=0;j<nClusters[pHit->Chamber()-1];j++)
- {
- Float_t diffx = primLocal.X() - clusX[pHit->Chamber()-1][j];
- Float_t diffy = primLocal.Y() - clusY[pHit->Chamber()-1][j];
-
-
- Float_t diff = sqrt(diffx*diffx + diffy*diffy);
-
- if(diff < minDist)
- {
- minDist = diff;
- maxInd = j;
- }
-
- }
-
- Float_t diffx = primLocal.X() - clusX[pHit->Chamber()-1][maxInd];
- Float_t diffy = primLocal.Y() - clusY[pHit->Chamber()-1][maxInd];
-
- cout << " diffx " << diffx << " diffy " << diffy << endl;
-
-
- SetMipIndex(maxInd);
- SetTrackIndex(i);
-
- Float_t shiftX = 0;//primLocal.X()/primLocal.Z()*(fRadiatorWidth+fQuartzWidth+fGapWidth) + primLocal.X(); ?????
- Float_t shiftY = 0;//primLocal.Y()/primLocal.Z()*(fRadiatorWidth+fQuartzWidth+fGapWidth) + primLocal.Y(); ?????
-
- SetShiftX(shiftX);
- SetShiftY(shiftY);
-
- Float_t *pclusX = &clusX[pHit->Chamber()-1][0];
- Float_t *pclusY = &clusY[pHit->Chamber()-1][0];
-
- SetCandidatePhotonX(pclusX);
- SetCandidatePhotonY(pclusY);
- SetCandidatePhotonsNumber(nClusters[pHit->Chamber()-1]);
-
- Int_t qch = clusQ[pHit->Chamber()-1][maxInd];
-
-
- if(minDist < 3.0 && qch > 120 && maxInd !=0)
- {
-
- if(fIsBACKGROUND)
- {
-
- Float_t xrndm = fXmin + (fXmax-fXmin)*gRandom->Rndm(280964);
- Float_t yrndm = fYmin + (fYmax-fYmin)*gRandom->Rndm(280964);
- SetShiftX(xrndm);
- SetShiftY(yrndm);
-
- }
-
- PatRec();
-
- trackThetaStored = GetTrackTheta();
- trackPhiStored = GetTrackPhi();
- thetaCerenkovStored = GetThetaCerenkov();
- houghPhotonsStored = GetHoughPhotons();
-
- Int_t diffNPhotons = 999;
- Int_t nsteps = 0;
- Float_t diffTrackTheta = 999.;
- Float_t diffTrackPhi = 999.;
-
- while(fIsMINIMIZER && GetHoughPhotons() > 2
- && diffNPhotons !=0
- && diffTrackTheta > 0.0001
- && nsteps < 10)
- {
-
- Int_t houghPhotonsBefore = GetHoughPhotons();
-
- Float_t trackThetaBefore = GetTrackTheta();
- Float_t trackPhiBefore = GetTrackPhi();
-
- Minimization();
-
- PatRec();
-
- diffNPhotons = TMath::Abs(houghPhotonsBefore - GetHoughPhotons());
-
- Float_t trackThetaAfter = GetTrackTheta();
- Float_t trackPhiAfter = GetTrackPhi();
-
- diffTrackTheta = TMath::Abs(trackThetaAfter - trackThetaBefore);
- diffTrackPhi = TMath::Abs(trackPhiAfter - trackPhiBefore);
-
- if(fDebug)
- cout << " houghPhotonsBefore " << houghPhotonsBefore
- << " GetHoughPhotons() " << GetHoughPhotons();
-
- nsteps++;
- }
-
- SetFittedThetaCerenkov(GetThetaCerenkov());
- SetFittedHoughPhotons(GetHoughPhotons());
-
- SetTrackTheta(trackThetaStored);
- SetTrackPhi(trackPhiStored);
- SetThetaCerenkov(thetaCerenkovStored);
- SetHoughPhotons(houghPhotonsStored);
-
- SetMinDist(minDist);
-
- FillHistograms();
-
- if(fIsDISPLAY) DrawEvent(1);
+#include "AliRICHCluster.h" //ThetaCerenkov()
+#include "AliRICHParam.h"
+#include "AliRICHHelix.h" //ThetaCerenkov()
+#include <AliLog.h>
- Waiting();
+#define NPointsOfRing 201
- }
- }
- if(fIsDISPLAY) fDisplay->Print("display.ps");
-}//StartProcessEvent()
//__________________________________________________________________________________________________
-void AliRICHRecon::EndProcessEvent()
+AliRICHRecon::AliRICHRecon()
+ :TTask ("RichRec","RichPat")
{
- // function called at the end of the event loop
-
- fOutFile->Write();
- fOutFile->Close();
+// main ctor
+ fThetaMin = 0.0; fThetaMax = 0.75;
+ fDTheta = 0.001; fWindowWidth = 0.045;
+ fMinNumPhots = 3;
+ fParam=AliRICHParam::Instance(); //get the pointer to AliRICHParam
}
//__________________________________________________________________________________________________
-void AliRICHRecon::PatRec()
+Double_t AliRICHRecon::ThetaCerenkov(AliRICHHelix *pHelix,TClonesArray *pClusters,Int_t &iMipId)
{
- //pattern recognition method based on Hough transform
-
-
- Float_t trackTheta = GetTrackTheta();
- Float_t trackPhi = GetTrackPhi();
- Float_t pmod = GetTrackMomentum();
- Int_t iMipIndex = GetMipIndex();
-
- Bool_t kPatRec = kFALSE;
-
- Int_t candidatePhotons = 0;
-
- Float_t shiftX = GetShiftX();
- Float_t shiftY = GetShiftY();
-
- Float_t* candidatePhotonX = GetCandidatePhotonX();
- Float_t* candidatePhotonY = GetCandidatePhotonY();
-
- Int_t candidatePhotonsNumber = GetCandidatePhotonsNumber();
-
- if(fDebug) cout << " n " << candidatePhotonsNumber << endl;
-
- SetThetaCerenkov(999.);
- SetHoughPhotons(0);
- SetHoughPhotonsNorm(0);
- SetHoughRMS(999.);
-
- for (Int_t j=0; j < candidatePhotonsNumber; j++)
- {
-
- SetPhotonIndex(j);
-
- SetPhotonFlag(0);
- SetPhotonEta(-999.);
- SetPhotonWeight(0.);
-
- if (j == iMipIndex) continue;
-
-
- if(candidatePhotonX[j] < -64.) continue; /* avoid artificial clusters from edge uesd by Yale.... */
-
- Float_t xtoentr = candidatePhotonX[j] - shiftX;
- Float_t ytoentr = candidatePhotonY[j] - shiftY;
-
- // Float_t chargehit = fHits_charge[j];
- // if(chargehit > 150) continue;
-
- SetEntranceX(xtoentr);
- SetEntranceY(ytoentr);
-
- FindPhiPoint();
-
- Int_t photonStatus = PhotonInBand();
-
- if(fDebug)
- {
- cout << " Photon n. " << j << " Status " << photonStatus << " accepted " << endl;
- cout << " CandidatePhotonX[j] " << candidatePhotonX[j] << " CandidatePhotonY[j] " << candidatePhotonY[j] << endl;
- }
-
- if(photonStatus == 0) continue;
-
- SetPhotonFlag(1);
-
- FindThetaPhotonCerenkov();
-
- Float_t thetaPhotonCerenkov = GetThetaPhotonCerenkov();
-
- if(fDebug) cout << " theta photon " << thetaPhotonCerenkov << endl;
-
- SetPhotonEta(thetaPhotonCerenkov);
-
- candidatePhotons++;
-
-
- }
-
- if(candidatePhotons >= 1) kPatRec = kTRUE;
-
- if(!kPatRec) return;
- {
- SetThetaCerenkov(999.);
- SetHoughPhotons(0);
- }
- SetPhotonsNumber(candidatePhotonsNumber);
-
- HoughResponse();
-
- fNrings++;
-
- FlagPhotons();
- Int_t nPhotonHough = GetHoughPhotons();
-
- if(nPhotonHough < 1)
- {
- SetThetaCerenkov(999.);
- SetHoughPhotonsNorm(0.);
- return;
- }
-
- if(fIsWEIGHT) FindWeightThetaCerenkov();
-
- Float_t thetaCerenkov = GetThetaCerenkov();
-
- SetThetaOfRing(thetaCerenkov);
- FindAreaAndPortionOfRing();
-
- Float_t nPhotonHoughNorm = ((Float_t)nPhotonHough)/GetPortionOfRing();
- SetHoughPhotonsNorm(nPhotonHoughNorm);
+// Pattern recognition method based on Hough transform
+// Return theta Cerenkov for a given track and list of clusters which are set in ctor
+// Remeber that list of clusters must contain more then 1 cluster. This considiration implies that normally we have 1 mip cluster and few photon clusters per track.
+// Argume
+// Returns: Track theta ckov in rad, nPhot contains number of photon candidates accepted for reconstruction track theta ckov
+ SetTrackTheta(pHelix->Ploc().Theta()); SetTrackPhi(pHelix->Ploc().Phi());
+ SetShiftX(pHelix->PosRad().X()); SetShiftY(pHelix->PosRad().Y());
+ fClusters = pClusters;
+ if(pClusters->GetEntries()>200) fIsWEIGHT = kTRUE; // offset to take into account bkg in reconstruction
+ else fIsWEIGHT = kFALSE;
+
+
+
+ SetThetaCerenkov(-1);
+
+ for (Int_t iClu=0; iClu<fClusters->GetEntriesFast();iClu++){//clusters loop
+ if(iClu == iMipId) continue; // do not consider MIP cluster as a photon candidate
+ SetPhotonIndex(iClu);
+ SetPhotonFlag(0);
+ SetPhotonEta(-999.);
+ SetPhotonWeight(0.);
+ AliRICHCluster *pClu=(AliRICHCluster*)fClusters->UncheckedAt(iClu); //get pointer to current cluster
+// if(pClu->Q()>AliRICHParam::QthMIP()) continue; //avoid MIP clusters from bkg
+ SetEntranceX(pClu->X() - GetShiftX()); SetEntranceY(pClu->Y() - GetShiftY()); //cluster position with respect to track intersection
+ FindPhiPoint();
+// if(PhotonInBand()==0) continue; ????????????
+ SetPhotonFlag(1);
+ FindThetaPhotonCerenkov();
+ Float_t thetaPhotonCerenkov = GetThetaPhotonCerenkov();
+ AliDebug(1,Form("Track Theta=%5.2f deg, Phi=%5.2f deg Photon clus=%2i ThetaCkov=%5.2f rad",GetTrackTheta()*TMath::RadToDeg(),GetTrackPhi()*TMath::RadToDeg()
+ ,iClu,thetaPhotonCerenkov ));
+ SetPhotonEta(thetaPhotonCerenkov);
+ }//clusters loop
+
+ SetPhotonsNumber(fClusters->GetEntries());
+
+ if((iMipId=FlagPhotons(HoughResponse()))<1) return -11; //flag photons according to individual theta ckov with respect to most probable track theta ckov
+
+
+// Float_t thetaCerenkov = GetThetaCerenkov();
+// SetThetaOfRing(thetaCerenkov);
+// FindAreaAndPortionOfRing();
+
+// Float_t nPhotonHoughNorm = ((Float_t)nPhotonHough)/GetPortionOfRing();
+// SetHoughPhotonsNorm(nPhotonHoughNorm);
// Calculate the area where the photon are accepted...
-
+/*
Float_t thetaInternal = thetaCerenkov - 0.5*fWindowWidth;
SetThetaOfRing(thetaInternal);
FindAreaAndPortionOfRing();
Float_t houghArea = externalArea - internalArea;
SetHoughArea(houghArea);
-
- if(fDebug)
- {
- cout << " ----- SUMMARY OF RECONSTRUCTION ----- " << endl;
- cout << " Rings found " << fNrings << " with thetac " << thetaCerenkov << endl;
-
-
- cout << " Nphotons " << GetPhotonsNumber()
- << " Hough " << nPhotonHough
- << " norm " << nPhotonHoughNorm << endl;
-
- cout << " In PatRec:p " << pmod << " theta " << trackTheta << " phi " << trackPhi << endl;
- cout << " ------------------------------------- " << endl;
- }
-
- Int_t nPhotons = GetPhotonsNumber();
-
- Float_t xmean = 0.;
- Float_t x2mean = 0.;
- Int_t nev = 0;
-
- for (Int_t j=0; j < nPhotons;j++)
- {
- SetPhotonIndex(j);
-
- Float_t eta = GetPhotonEta();
-
- if(eta != -999.)
- {
- if(GetPhotonFlag() == 2)
- {
-
-
- xmean += eta;
- x2mean += eta*eta;
- nev++;
- }
- }
- }
-
- if(nev > 0)
- {
- xmean /=(Float_t)nev;
- x2mean /=(Float_t)nev;
- } else {
- xmean = 0.;
- x2mean = 0.;
- }
-
- Float_t vRMS = sqrt(x2mean - xmean*xmean);
-
- SetHoughRMS(vRMS);
-
- if(fDebug) cout << " RMS " << vRMS << endl;
-
-}
-
-void AliRICHRecon::FindEmissionPoint()
-{
- //estimate the emission point in radiator
-
-// Find emission point
-
- Float_t absorbtionLenght=7.83*fRadiatorWidth; //absorption length in the freon (cm)
- // 7.83 = -1/ln(T0) where
- // T0->Trasmission freon at 180nm = 0.88 (Eph=6.85eV)
- Float_t photonLenght, photonLenghtMin, photonLenghtMax;
-
- photonLenght=exp(-fRadiatorWidth/(absorbtionLenght*cos(fCerenkovAnglePad)));
- photonLenghtMin=fRadiatorWidth*photonLenght/(1.-photonLenght);
- photonLenghtMax=absorbtionLenght*cos(fCerenkovAnglePad);
- Float_t emissionPoint = fRadiatorWidth + photonLenghtMin - photonLenghtMax;
-
- SetEmissionPoint(emissionPoint);
-}
-
-
+*/
+ FindThetaCerenkov();
+ return GetThetaCerenkov();
+}//ThetaCerenkov()
+//__________________________________________________________________________________________________
Int_t AliRICHRecon::PhotonInBand()
{
- //search band fro photon candidates
+// Define valid band for photon candidates. For that photons with ThetaMin and ThetaMax are traced up to photcathode
- // Float_t massOfParticle;
- Float_t beta;
Float_t nfreon;
Float_t thetacer;
Float_t phpad = GetPhiPoint();
- // Float_t pmod = GetTrackMomentum();
- // Float_t trackTheta = GetTrackTheta();
- // Float_t trackPhi = GetTrackPhi();
// inner radius //
- SetPhotonEnergy(5.6);
- SetEmissionPoint(fRadiatorWidth -0.0001);
- SetMassHypotesis(0.93828);
-
- SetBetaOfParticle();
- SetFreonRefractiveIndex();
-
- beta = GetBetaOfParticle();
- nfreon = GetFreonRefractiveIndex();
-
- thetacer = Cerenkovangle(nfreon,beta);
+ SetEmissionPoint(AliRICHParam::RadThick() -0.0001);
+ nfreon = fParam->IdxC6F14(fParam->EckovMin());
thetacer = 0.;
- if(fDebug) cout << " thetacer in photoninband min " << thetacer << endl;
+ AliDebug(1,Form("thetacer in photoninband min %f",thetacer));
FindThetaAtQuartz(thetacer);
- if(thetacer == 999. || GetThetaAtQuartz() == 999.)
- {
+ if(thetacer == 999. || GetThetaAtQuartz() == 999.) {
innerRadius = -999.;
SetXInnerRing(-999.);
SetYInnerRing(-999.);
}
// outer radius //
- SetPhotonEnergy(7.7);
SetEmissionPoint(0.);
// SetMassHypotesis(0.139567);
- SetMassHypotesis(0.);
-
- SetBetaOfParticle();
- SetFreonRefractiveIndex();
- beta = GetBetaOfParticle();
- nfreon = GetFreonRefractiveIndex();
+ nfreon = fParam->IdxC6F14(fParam->EckovMax());
- thetacer = Cerenkovangle(nfreon,beta);
+ thetacer = Cerenkovangle(nfreon,1);
// thetacer = 0.75;
- if(fDebug) cout << " thetacer in photoninband max " << thetacer << endl;
+ AliDebug(1,Form("thetacer in photoninband max %f",thetacer));
FindThetaAtQuartz(thetacer);
Float_t padradius = sqrt(TMath::Power(xtoentr,2)+TMath::Power(ytoentr,2));
- if(fDebug) printf(" rmin %f r %f rmax %f \n",innerRadius,padradius,outerRadius);
+ AliDebug(1,Form("rmin %f r %f rmax %f",innerRadius,padradius,outerRadius));
if(padradius>=innerRadius && padradius<=outerRadius) return 1;
return 0;
-}
-
+}//PhotonInBand()
+//__________________________________________________________________________________________________
void AliRICHRecon::FindThetaAtQuartz(Float_t thetaCerenkov)
{
- //find the theta at the quartz plate
+// find the theta at the quartz plate
- if(thetaCerenkov == 999.)
- {
- SetThetaAtQuartz(999.);
- return;
- }
+ if(thetaCerenkov == 999.) { SetThetaAtQuartz(999.); return; }
Float_t thetaAtQuartz = 999.;
Float_t trackTheta = GetTrackTheta();
if(trackTheta == 0) {
-
- if(fDebug) cout << " Theta sol unique " << thetaCerenkov << endl;
-
thetaAtQuartz = thetaCerenkov;
SetThetaAtQuartz(thetaAtQuartz);
return;
Float_t trackPhi = GetTrackPhi();
Float_t phiPoint = GetPhiPoint();
- Double_t den = TMath::Sin((Double_t)trackTheta)
- *TMath::Cos((Double_t)trackPhi)
- *TMath::Cos((Double_t)phiPoint) +
- TMath::Sin((Double_t)trackTheta)
- *TMath::Sin((Double_t)trackPhi)
- *TMath::Sin((Double_t)phiPoint);
+ Double_t den = TMath::Sin((Double_t)trackTheta)*TMath::Cos((Double_t)trackPhi)*TMath::Cos((Double_t)phiPoint) +
+ TMath::Sin((Double_t)trackTheta)*TMath::Sin((Double_t)trackPhi)*TMath::Sin((Double_t)phiPoint);
Double_t b = TMath::Cos((Double_t)trackTheta)/den;
Double_t c = -TMath::Cos((Double_t)thetaCerenkov)/den;
Double_t underSqrt = 1 + b*b - c*c;
- if(fDebug)
- {
- cout << " trackTheta " << trackTheta << endl;
- cout << " TrackPhi " << trackPhi << endl;
- cout << " PhiPoint " << phiPoint << endl;
- cout << " ThetaCerenkov " << thetaCerenkov << endl;
- cout << " den b c " << den << " b " << b << " c " << c << endl;
- }
-
if(underSqrt < 0) {
- if(fDebug) cout << " sqrt negative !!!!" << underSqrt << endl;
SetThetaAtQuartz(999.);
return;
}
Double_t thetaSol1 = 2*TMath::ATan(sol1);
Double_t thetaSol2 = 2*TMath::ATan(sol2);
- if(fDebug) cout << " Theta sol 1 " << thetaSol1
- << " Theta sol 2 " << thetaSol2 << endl;
-
if(thetaSol1>0 && thetaSol1 < TMath::Pi()) thetaAtQuartz = (Float_t)thetaSol1;
if(thetaSol2>0 && thetaSol2 < TMath::Pi()) thetaAtQuartz = (Float_t)thetaSol2;
+// AliDebug(1,Form(" Theta @ quartz window %f ",thetaAtQuartz));
+
SetThetaAtQuartz(thetaAtQuartz);
}
-
+//__________________________________________________________________________________________________
void AliRICHRecon::FindThetaPhotonCerenkov()
{
//find theta cerenkov of ring
const Float_t kTollerance = 0.05;
- // Float_t pmod = GetTrackMomentum();
- // Float_t trackTheta = GetTrackTheta();
- // Float_t trackPhi = GetTrackPhi();
Float_t phiPoint = GetPhiPoint();
- SetPhotonEnergy(6.85);
- SetEmissionPoint(fRadiatorWidth/2);
+ SetEmissionPoint(AliRICHParam::RadThick()/2);
Float_t xPoint = GetEntranceX();
Float_t yPoint = GetEntranceY();
- Float_t distPoint = sqrt(xPoint*xPoint + yPoint*yPoint);
+ Float_t distPoint = TMath::Sqrt(xPoint*xPoint + yPoint*yPoint);
- if(fDebug) cout << " DistPoint " << distPoint << endl;
+// AliDebug(1,Form(" DistPoint %f ",distPoint));
// Star minimization...
radiusMean = FromEmissionToCathode();
}
- if(fDebug) cout << " r1 " << radiusMin << " rmean "
- << radiusMean << " r2 " << radiusMax << endl;
+// AliDebug(1,Form(" r1 %f rmean %f r2 %f",radiusMin,radiusMean,radiusMax));
while (TMath::Abs(radiusMean-distPoint) > kTollerance)
{
nIteration++;
if(nIteration>=50) {
- if(fDebug) printf(" max iterations in FindPhotonCerenkov\n");
+// AliDebug(1,Form(" max iterations in FindPhotonCerenkov ",nIteration));
SetThetaPhotonCerenkov(999.);
return;
}
}
+// AliDebug(1,Form(" distpoint %f radius %f ",distPoint,radiusMean));
SetThetaPhotonCerenkov(thetaCerMean);
}
-
+//__________________________________________________________________________________________________
void AliRICHRecon::FindAreaAndPortionOfRing()
{
//find fraction of the ring accepted by the RICH
Float_t x0 = xemiss + shiftX;
Float_t y0 = yemiss + shiftY;
- // Float_t pmod = GetTrackMomentum();
- // Float_t trackTheta = GetTrackTheta();
- // Float_t trackPhi = GetTrackPhi();
- SetPhotonEnergy(6.85);
- SetFreonRefractiveIndex();
- SetEmissionPoint(fRadiatorWidth/2.);
+ SetEmissionPoint(AliRICHParam::RadThick()/2.);
Float_t theta = GetThetaOfRing();
Int_t nPsiAccepted = 0;
Int_t nPsiTotal = 0;
- for(Int_t i=0;i<NPointsOfRing-1;i++)
- {
-
+ for(Int_t i=0;i<NPointsOfRing-1;i++){
Float_t psi = 2*TMath::Pi()*i/NPointsOfRing;
SetThetaPhotonInTRS(theta);
Int_t zone = CheckDetectorAcceptance();
+ AliDebug(1,Form("acceptance to detector zone -> %d",zone));
- if (zone != 0)
- {
- FindIntersectionWithDetector();
- xPoint[nPoints] = GetIntersectionX();
- yPoint[nPoints] = GetIntersectionY();
- }
- else
- {
- xPoint[nPoints] = xPointRing;
- yPoint[nPoints] = yPointRing;
- nPsiAccepted++;
- }
-
+ if (zone != 0){
+ FindIntersectionWithDetector();
+ xPoint[nPoints] = GetIntersectionX(); yPoint[nPoints] = GetIntersectionY();
+ }else{
+ xPoint[nPoints] = xPointRing; yPoint[nPoints] = yPointRing;
+ nPsiAccepted++;
+ }
nPoints++;
+ }
- }
-
- xPoint[nPoints] = xPoint[0];
- yPoint[nPoints] = yPoint[0];
+ xPoint[nPoints] = xPoint[0]; yPoint[nPoints] = yPoint[0];
// find area...
area *= 0.5;
- Float_t portionOfRing = ((Float_t)nPsiAccepted)/((Float_t)(nPsiTotal));
+ Float_t portionOfRing = 0;
+ if (nPsiTotal>0)
+ portionOfRing = ((Float_t)nPsiAccepted)/((Float_t)(nPsiTotal));
SetAreaOfRing(area);
SetPortionOfRing(portionOfRing);
-}
-
+}//FindAreaAndPortionOfRing()
+//__________________________________________________________________________________________________
void AliRICHRecon::FindIntersectionWithDetector()
{
// find ring intersection with CsI edges
y1 = yPoint;
}
//
- xIntersect = fXmax;
+ xIntersect = AliRICHParam::PcSizeX();
yIntersect = m*(xIntersect - x0) + y0;
- if (yIntersect >= fYmin && yIntersect <= fYmax && xIntersect >= x1 && xIntersect <= x2)
+ if (yIntersect >= 0 && yIntersect <= AliRICHParam::PcSizeY() && xIntersect >= x1 && xIntersect <= x2)
{
SetIntersectionX(xIntersect);
SetIntersectionY(yIntersect);
return;
}
//
- xIntersect = fXmin;
+ xIntersect = 0;
yIntersect = m*(xIntersect - x0) + y0;
- if (yIntersect >= fYmin && yIntersect <= fYmax && xIntersect >= x1 && xIntersect <= x2)
+ if (yIntersect >= 0 && yIntersect <= AliRICHParam::PcSizeY() && xIntersect >= x1 && xIntersect <= x2)
{
SetIntersectionX(xIntersect);
SetIntersectionY(yIntersect);
return;
}
//
- yIntersect = fYmax;
+ yIntersect = AliRICHParam::PcSizeY();
xIntersect = (yIntersect - y0)/m + x0;
- if (xIntersect >= fXmin && xIntersect <= fXmax && yIntersect >= y1 && yIntersect <= y2)
+ if (xIntersect >= 0 && xIntersect <= AliRICHParam::PcSizeX() && yIntersect >= y1 && yIntersect <= y2)
{
SetIntersectionX(xIntersect);
SetIntersectionY(yIntersect);
return;
}
//
- yIntersect = fYmin;
+ yIntersect = 0;
xIntersect = (yIntersect - y0)/m + x0;
- if (xIntersect >= fXmin && xIntersect <= fXmax && yIntersect >= y1 && yIntersect <= y2)
+ if (xIntersect >= 0 && xIntersect <= AliRICHParam::PcSizeX() && yIntersect >= y1 && yIntersect <= y2)
{
SetIntersectionX(xIntersect);
SetIntersectionY(yIntersect);
return;
}
-
- cout << " sono fuori!!!!!!" << endl;
-
}
+
//__________________________________________________________________________________________________
Int_t AliRICHRecon::CheckDetectorAcceptance() const
{
Float_t xcoord = GetDetectorWhereX();
Float_t ycoord = GetDetectorWhereY();
- if(xcoord > fXmax)
+ if(xcoord > AliRICHParam::PcSizeX())
{
- if(ycoord > fYmax) return 2;
- if(ycoord > fYmin && ycoord < fYmax) return 3;
- if(ycoord < fYmin) return 4;
+ if(ycoord > AliRICHParam::PcSizeY()) return 2;
+ if(ycoord > 0 && ycoord < AliRICHParam::PcSizeY()) return 3;
+ if(ycoord < 0) return 4;
}
- if(xcoord < fXmin)
+ if(xcoord < 0)
{
- if(ycoord > fYmax) return 8;
- if(ycoord > fYmin && ycoord < fYmax) return 7;
- if(ycoord < fYmin) return 6;
+ if(ycoord > AliRICHParam::PcSizeY()) return 8;
+ if(ycoord > 0 && ycoord < AliRICHParam::PcSizeY()) return 7;
+ if(ycoord < 0) return 6;
}
- if(xcoord > fXmin && xcoord < fXmax)
+ if(xcoord > 0 && xcoord < AliRICHParam::PcSizeX())
{
- if(ycoord > fYmax) return 1;
- if(ycoord > fYmin && ycoord < fYmax) return 0;
- if(ycoord < fYmin) return 5;
+ if(ycoord > AliRICHParam::PcSizeY()) return 1;
+ if(ycoord > 0 && ycoord < AliRICHParam::PcSizeY()) return 0;
+ if(ycoord < 0) return 5;
}
return 999;
}
//__________________________________________________________________________________________________
-Float_t AliRICHRecon::PhotonPositionOnCathode()
-{
- // find the photon position on the CsI
- // Float_t massOfParticle;
- Float_t beta;
- Float_t nfreon;
-
-
- SetPhotonEnergy(6.85);
- SetEmissionPoint(fRadiatorWidth/2.);
- SetMassHypotesis(0.139567);
-
- SetBetaOfParticle();
- SetFreonRefractiveIndex();
-
- beta = GetBetaOfParticle();
- nfreon = GetFreonRefractiveIndex();
-
-
- Float_t radius = FromEmissionToCathode();
- if (radius == 999.) return 999.;
-
- return 0;
-}
-
void AliRICHRecon::FindPhotonAnglesInDRS()
{
// Setup the rotation matrix of the track...
SetPhiPhotonInDRS(phi);
}
-
+//__________________________________________________________________________________________________
Float_t AliRICHRecon::FromEmissionToCathode()
{
- // trace from emission point to cathode
+// Trace current photon from emission point somewhere in radiator to photocathode
+// Arguments: none
+// Returns:
Float_t nfreon, nquartz, ngas;
- SetFreonRefractiveIndex();
- SetQuartzRefractiveIndex();
- SetGasRefractiveIndex();
- nfreon = GetFreonRefractiveIndex();
- nquartz = GetQuartzRefractiveIndex();
- ngas = GetGasRefractiveIndex();
+ nfreon = fParam->IdxC6F14(fParam->EckovMean());
+ nquartz = fParam->IdxSiO2(fParam->EckovMean());
+ ngas = fParam->IdxCH4(fParam->EckovMean());
Float_t trackTheta = GetTrackTheta();
Float_t trackPhi = GetTrackPhi();
Float_t theta = GetThetaPhotonInDRS();
Float_t phi = GetPhiPhotonInDRS();
-// cout << " Theta " << Theta << " Phi " << Phi << endl;
-
Float_t xemiss = lengthOfEmissionPoint*tan(trackTheta)*cos(trackPhi);
Float_t yemiss = lengthOfEmissionPoint*tan(trackTheta)*sin(trackPhi);
return thetagap;
}
- Float_t xw = (fRadiatorWidth - lengthOfEmissionPoint)*cos(phi)*tan(theta);
- Float_t xq = fQuartzWidth*cos(phi)*tan(thetaquar);
- Float_t xg = fGapWidth*cos(phi)*tan(thetagap);
- Float_t yw = (fRadiatorWidth - lengthOfEmissionPoint)*sin(phi)*tan(theta);
- Float_t yq = fQuartzWidth*sin(phi)*tan(thetaquar);
- Float_t yg = fGapWidth*sin(phi)*tan(thetagap);
+ Float_t xw = (AliRICHParam::RadThick() - lengthOfEmissionPoint)*cos(phi)*tan(theta);
+ Float_t xq = AliRICHParam::WinThick()*cos(phi)*tan(thetaquar);
+ Float_t xg = AliRICHParam::Pc2Win()*cos(phi)*tan(thetagap);
+ Float_t yw = (AliRICHParam::RadThick() - lengthOfEmissionPoint)*sin(phi)*tan(theta);
+ Float_t yq = AliRICHParam::WinThick()*sin(phi)*tan(thetaquar);
+ Float_t yg = AliRICHParam::Pc2Win()*sin(phi)*tan(thetagap);
Float_t xtot = xemiss + xw + xq + xg;
SetYPointOnCathode(ytot);
- Float_t distanceFromEntrance = sqrt(TMath::Power(fPhotonLimitX,2)
- +TMath::Power(fPhotonLimitY,2));
+ Float_t distanceFromEntrance = TMath::Sqrt(TMath::Power(fPhotonLimitX,2)+TMath::Power(fPhotonLimitY,2));
return distanceFromEntrance;
}
-
-
+//__________________________________________________________________________________________________
void AliRICHRecon::FindPhiPoint()
{
//find phi of generated point
Float_t argY = ytoentr - emissionPoint*tan(trackTheta)*sin(trackPhi);
Float_t argX = xtoentr - emissionPoint*tan(trackTheta)*cos(trackPhi);
- Float_t phipad = atan2(argY,argX);
+ Float_t phi = atan2(argY,argX);
- SetPhiPoint(phipad);
+ SetPhiPoint(phi);
}
-
+//__________________________________________________________________________________________________
Float_t AliRICHRecon::Cerenkovangle(Float_t n, Float_t beta)
{
// cerenkov angle from n and beta
thetacer = acos (1./(n*beta));
return thetacer;
}
-
+//__________________________________________________________________________________________________
Float_t AliRICHRecon::SnellAngle(Float_t n1, Float_t n2, Float_t theta1)
{
// Snell law
refractangle = asin(sinrefractangle);
return refractangle;
}
-
-
-void AliRICHRecon::HoughResponse()
+//__________________________________________________________________________________________________
+Double_t AliRICHRecon::HoughResponse()
{
- //Hough response
-
-// Implement Hough response pat. rec. method
-
- Float_t *hCSspace;
-
- int bin=0;
- int bin1=0;
- int bin2=0;
- int i, j, k, nCorrBand;
- float hcs[750],hcsw[750];
- float angle, weight;
- float lowerlimit,upperlimit;
-
- float etaPeak[100];
-
- int nBin;
-
- float etaPeakPos = -1;
-
- Int_t etaPeakCount = -1;
-
- Float_t thetaCerenkov = 0.;
-
- nBin = (int)(0.5+fThetaMax/(fDTheta));
- nCorrBand = (int)(0.5+ fWindowWidth/(2 * fDTheta));
-
- memset ((void *)hcs, 0, fThetaBin*sizeof(float));
- memset ((void *)hcsw, 0, fThetaBin*sizeof(float));
-
- Int_t nPhotons = GetPhotonsNumber();
-
- Int_t weightFlag = 0;
-
- for (k=0; k< nPhotons; k++) {
-
- SetPhotonIndex(k);
-
- angle = GetPhotonEta();
-
- if(angle == -999.) continue;
-
- if (angle>=fThetaMin && angle<= fThetaMax)
-
- {
-
- bin = (int)(0.5+angle/(fDTheta));
-
- bin1= bin-nCorrBand;
- bin2= bin+nCorrBand;
-
- // calculate weights
-
- if(fIsWEIGHT)
- {
- lowerlimit = ((Float_t)bin1)*fDTheta + 0.5*fDTheta;
- SetThetaOfRing(lowerlimit);
- FindAreaAndPortionOfRing();
- Float_t area1 = GetAreaOfRing();
-
- upperlimit = ((Float_t)bin2)*fDTheta + 0.5*fDTheta;
- SetThetaOfRing(upperlimit);
- FindAreaAndPortionOfRing();
- Float_t area2 = GetAreaOfRing();
-
- // cout << "lowerlimit" << lowerlimit << "upperlimit " << upperlimit << endl;
- Float_t diffarea = area2 - area1;
-
- if(diffarea>0)
- {
- weight = 1./(area2-area1);
- }
- else
- {
- weightFlag = 1;
- weight = 1.;
- }
-
- // cout <<" low "<< lowerlimit << " up " << upperlimit <<
- // " area1 " << area1 << " area2 " << area2 << " weight " << weight << endl;
-
- }
- else
- {
- weight = 1.;
- }
-
- SetPhotonWeight(weight);
-
- // cout << "weight..." << weight << endl;
-
-
- if (bin1<0) bin1=0;
- if (bin2>nBin) bin2=nBin;
-
- for (j=bin1; j<bin2; j++)
- {
- hcs[j] += 1;
- hcsw[j] += weight;
- }
- }
- }
-
-
- if(weightFlag == 0)
- {
- hCSspace = hcsw;
- }
- else
- {
- hCSspace = hcs;
- // cout << " probems with weight...normal procedure adopted " << endl;
- }
-
- HoughFiltering(hCSspace);
-
- for (bin=0; bin <nBin; bin++) {
- angle = (bin+0.5) * (fDTheta);
- if (hCSspace[bin] && hCSspace[bin] > etaPeakPos) {
- etaPeakCount = 0;
- etaPeakPos = hCSspace[bin];
- etaPeak[0]=angle;
- }
- else {
- if (hCSspace[bin] == etaPeakPos) {
- etaPeak[++etaPeakCount] = angle;
- }
- }
+//
+//
+//
+ Int_t nChannels = (Int_t)(fThetaMax/fDTheta+0.5);
+ TH1F *phots = new TH1F("phots" ,"phots" ,nChannels,0,fThetaMax);
+ TH1F *photsw = new TH1F("photsw" ,"photsw" ,nChannels,0,fThetaMax);
+ TH1F *resultw = new TH1F("resultw","resultw",nChannels,0,fThetaMax);
+ Int_t nBin = (Int_t)(fThetaMax/fDTheta);
+ Int_t nCorrBand = (Int_t)(fWindowWidth/(2*fDTheta));
+ AliDebug(1,Form("Ring reconstruction for track with theta %f",GetTrackTheta()*TMath::RadToDeg()));
+ for (Int_t kPhot=0; kPhot< GetPhotonsNumber(); kPhot++){
+ SetPhotonIndex(kPhot);
+ Double_t angle = GetPhotonEta();
+ if(angle<0||angle>fThetaMax) continue;
+ phots->Fill(angle);
+ Int_t bin = (Int_t)(0.5+angle/(fDTheta));
+ Double_t weight=1.;
+ if(fIsWEIGHT){
+ Double_t lowerlimit = ((Float_t)bin)*fDTheta - 0.5*fDTheta;
+ SetThetaOfRing(lowerlimit);
+ FindAreaAndPortionOfRing();
+ Float_t area1 = GetAreaOfRing();
+ Double_t upperlimit = ((Float_t)bin)*fDTheta + 0.5*fDTheta;
+ SetThetaOfRing(upperlimit);
+ FindAreaAndPortionOfRing();
+ Float_t area2 = GetAreaOfRing();
+ AliDebug(1,Form("lowerlimit %f area %f ; upperlimit %f area %f",lowerlimit,area1,upperlimit,area2));
+ Float_t diffarea = area2 - area1;
+ if(diffarea>0){weight = 1./(area2-area1);}else{weight = 1.;}
+ }
+ AliDebug(1,Form("Calculated weight %f",weight));
+ photsw->Fill(angle,weight);
+ SetPhotonWeight(weight);
+ }
+ for (Int_t i=1; i<=nBin;i++){
+ Int_t bin1= i-nCorrBand;
+ Int_t bin2= i+nCorrBand;
+ if(bin1<1) bin1=1;
+ if(bin2>nBin)bin2=nBin;
+ Double_t sumPhots=phots->Integral(bin1,bin2);
+ if(sumPhots<fMinNumPhots) continue; // cut on minimum n. of photons per ring
+ Double_t sumPhotsw=photsw->Integral(bin1,bin2);
+ resultw->Fill((Float_t)((i+0.5)*fDTheta),sumPhotsw);
}
-
- for (i=0; i<etaPeakCount+1; i++) {
- thetaCerenkov += etaPeak[i];
- }
- if (etaPeakCount>=0) {
- thetaCerenkov /= etaPeakCount+1;
- fThetaPeakPos = etaPeakPos;
- }
-
- SetThetaCerenkov(thetaCerenkov);
-}
-
-
-void AliRICHRecon::HoughFiltering(float hcs[])
-{
- // filter for Hough
-
-// hough filtering
-
- float hcsFilt[750];
- float k[5] = {0.05, 0.25, 0.4, 0.25, 0.05};
- int nx, i, nxDx;
- int sizeHCS;
- int nBin;
-
- nBin = (int)(1+fThetaMax/fDTheta);
- sizeHCS = fThetaBin*sizeof(float);
-
- memset ((void *)hcsFilt, 0, sizeHCS);
-
- for (nx = 0; nx < nBin; nx++) {
- for (i = 0; i < 5; i++) {
- nxDx = nx + (i-2);
- if (nxDx> -1 && nxDx<nBin)
- hcsFilt[nx] += hcs[nxDx] * k[i];
- }
- }
-
- for (nx = 0; nx < nBin; nx++) {
- hcs[nx] = hcsFilt[nx];
- }
-}
-
-void AliRICHRecon::FindWeightThetaCerenkov()
+// evaluate the "BEST" theta ckov as the maximum value of histogramm
+ Float_t *pVec = resultw->GetArray();
+ Int_t locMax = TMath::LocMax(nBin,pVec);
+ phots->Delete();photsw->Delete();resultw->Delete(); // Reset and delete objects
+
+ return (Double_t)(locMax*fDTheta+0.5*fDTheta); //final most probable track theta ckov
+}//HoughResponse
+//__________________________________________________________________________________________________
+void AliRICHRecon::FindThetaCerenkov()
{
// manage with weight for photons
Float_t wei = 0.;
Float_t weightThetaCerenkov = 0.;
- Int_t nPhotons = GetPhotonsNumber();
- for(Int_t i=0;i<nPhotons;i++)
- {
- SetPhotonIndex(i);
-
- if(GetPhotonFlag() == 2)
- {
- Float_t photonEta = GetPhotonEta();
- Float_t photonWeight = GetPhotonWeight();
- weightThetaCerenkov += photonEta*photonWeight;
- wei += photonWeight;
- }
- }
+ Double_t etaMin=9999.,etaMax=0.;
+ for(Int_t i=0;i<GetPhotonsNumber();i++){
+ SetPhotonIndex(i);
+ if(GetPhotonFlag() == 2){
+ Float_t photonEta = GetPhotonEta();
+ if(photonEta<etaMin) etaMin=photonEta;
+ if(photonEta>etaMax) etaMax=photonEta;
+ Float_t photonWeight = GetPhotonWeight();
+ weightThetaCerenkov += photonEta*photonWeight;
+ wei += photonWeight;
+ }
+ }
- if(wei != 0.)
- {
- weightThetaCerenkov /= wei;
- }
- else
- {
- weightThetaCerenkov = 0.;
- }
-
+ if(wei != 0.) weightThetaCerenkov /= wei; else weightThetaCerenkov = 0.;
SetThetaCerenkov(weightThetaCerenkov);
- cout << " thetac weighted -> " << weightThetaCerenkov << endl;
-}
-
+ // estimate of the n. of bkg photons
+ SetThetaOfRing(etaMin); FindAreaAndPortionOfRing(); Double_t internalArea = GetAreaOfRing();
+ SetThetaOfRing(etaMax); FindAreaAndPortionOfRing(); Double_t externalArea = GetAreaOfRing();
-void AliRICHRecon::FlagPhotons()
+ Double_t effArea = (AliRICHParam::PcSizeX()-AliRICHParam::DeadZone())*(AliRICHParam::PcSizeY()-2*AliRICHParam::DeadZone());
+ Double_t nPhotBKG = (externalArea-internalArea)/effArea*fClusters->GetEntries();
+ if(nPhotBKG<0) nPhotBKG=0; //just protection from funny angles...
+ SetPhotBKG(nPhotBKG);
+ //
+
+ AliDebug(1,Form(" thetac weighted -> %f",weightThetaCerenkov));
+}
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliRICHRecon::FlagPhotons(Double_t thetaCkovHough)
{
- // flag photons
-
- Int_t nPhotonHough = 0;
-
- Float_t thetaCerenkov = GetThetaCerenkov();
- if(fDebug) cout << " fThetaCerenkov " << thetaCerenkov << endl;
+// flag photon candidates if their individual theta ckov inside the window around theta ckov of Hough transform
+// Arguments: thetaCkovHough- value of most probable theta ckov for track as returned by HoughResponse()
+// Returns: number of photon candidates happened to be inside the window
- Float_t thetaDist= thetaCerenkov - fThetaMin;
- Int_t steps = (Int_t)(thetaDist / fDTheta);
+ Int_t steps = (Int_t)((thetaCkovHough - fThetaMin)/ fDTheta); //how many times we need to have fDTheta to fill the distance betwee fThetaMin and thetaCkovHough
Float_t tmin = fThetaMin + (Float_t)(steps - 1)*fDTheta;
Float_t tmax = fThetaMin + (Float_t)(steps)*fDTheta;
Float_t tavg = 0.5*(tmin+tmax);
- tmin = tavg - 0.5*fWindowWidth;
- tmax = tavg + 0.5*fWindowWidth;
-
- if(fDebug) cout << " tmin " << tmin << " tmax " << tmax << endl;
- if(fDebug) cout << " thetac " << thetaCerenkov << endl;
-
- // Int_t candidatePhotonsNumber = GetCandidatePhotonsNumber();
-
- Int_t nPhotons = GetPhotonsNumber();
-
- // for(Int_t i=0;i<candidatePhotonsNumber;i++)
-
- for(Int_t i=0;i<nPhotons;i++)
- {
- SetPhotonIndex(i);
-
- Float_t photonEta = GetPhotonEta();
-
- if(photonEta == -999.) continue;
-
- if(photonEta >= tmin && photonEta <= tmax)
- {
- SetPhotonFlag(2);
- nPhotonHough++;
- }
- }
- SetHoughPhotons(nPhotonHough);
-}
-
-void AliRICHRecon::DrawEvent(Int_t flag) const
-{
- // draw event with rings
-
- flag=1; // dummy to be removed...
-}
-
-Float_t AliRICHRecon::FindMassOfParticle()
-{
- // find mass of the particle from theta cerenkov
-
- Float_t pmod = GetTrackMomentum();
-
- SetPhotonEnergy(6.85);
- SetFreonRefractiveIndex();
-
- Float_t thetaCerenkov = GetThetaCerenkov();
- FindBetaFromTheta(thetaCerenkov);
-
- Double_t beta = (Double_t)(GetBetaOfParticle());
- Double_t den = 1. - beta*beta;
- if(den<=0.) return 999.;
+ tmin = tavg - 0.5*fWindowWidth; tmax = tavg + 0.5*fWindowWidth;
- Double_t gamma = 1./TMath::Sqrt(den);
-
- Float_t mass = pmod/(beta*(Float_t)gamma);
-
- return mass;
-}
-
-
-void AliRICHRecon::FillHistograms()
-{
- // fill histograms..
-
- Float_t fittedTrackTheta, fittedTrackPhi;
-
- Float_t thetaCerenkov = GetThetaCerenkov();
- if(thetaCerenkov == 999.) return;
-
- Float_t vertZ = GetEventVertexZ();
-
- Float_t trackTheta = GetTrackTheta();
- Float_t trackPhi = GetTrackPhi();
- Float_t pmod = GetTrackMomentum();
- Float_t pt = GetTrackPt();
- Float_t trackEta = GetTrackEta();
- Int_t q = GetTrackCharge();
- Float_t tPCLastZ = GetTrackTPCLastZ();
- Float_t minDist = GetMinDist();
-
- fittedTrackTheta = GetFittedTrackTheta();
- fittedTrackPhi = GetFittedTrackPhi();
- Int_t fittednPhotonHough = GetFittedHoughPhotons();
-
- if(fDebug)
- {
- cout << " p " << pmod << " ThetaC " << thetaCerenkov
- << " rings " << fNrings << endl;
- }
-
- Int_t nPhotonHough = GetHoughPhotons();
-// Float_t nPhotonHoughNorm = GetHoughPhotonsNorm();
- Float_t inRing = GetPortionOfRing();
-
- Float_t massOfParticle = FindMassOfParticle();
-
- Float_t houghArea = GetHoughArea();
- Float_t multiplicity = GetEventMultiplicity();
-
-
- Float_t var[20];
-
- var[0] = 0;
- var[1] = 0;
- var[2] = vertZ;
- var[3] = pmod;
- var[4] = pt;
- var[5] = trackEta;
- var[6] = trackTheta;
- var[7] = trackPhi;
- var[8] = fittedTrackTheta;
- var[9] = fittedTrackPhi;
- var[10] = q;
- var[11] = thetaCerenkov;
- var[12] = (Float_t)nPhotonHough;
- var[13] = (Float_t)fittednPhotonHough;
- var[14] = inRing;
- var[15] = massOfParticle;
- var[16] = houghArea;
- var[17] = multiplicity;
- var[18] = tPCLastZ;
- var[19] = minDist;
-
- fNtuple->Fill(var);
-
-
- fittedTrackTheta = GetFittedTrackTheta();
- fittedTrackPhi = GetFittedTrackPhi();
-
-
-
- if(thetaCerenkov > 0.505 && thetaCerenkov < 0.605) {
- SetPhotonEnergy(6.85);
- SetFreonRefractiveIndex();
+ Int_t iInsideCnt = 0; //count photons which theta inside prdefined window
+ for(Int_t i=0;i<GetPhotonsNumber();i++){//photon candidates loop
+ SetPhotonIndex(i); Float_t photonEta = GetPhotonEta();
+ if(photonEta == -999.) continue;
+ if(photonEta >= tmin && photonEta <= tmax) { SetPhotonFlag(2); iInsideCnt++;}
}
-
- Int_t nPhotons = GetPhotonsNumber();
-
- for (Int_t j=0; j < nPhotons;j++)
- SetPhotonIndex(j);
-}//FillHistograms()
-//__________________________________________________________________________________________________
-void AliRICHRecon::Minimization()
-{
- // minimization to find the best theta and phi of the track
-
- Double_t arglist;
- Int_t ierflag = 0;
-
- static Double_t vstart[2];
- static Double_t lower[2], upper[2];
- static Double_t step[2]={0.001,0.001};
-
- Double_t trackThetaNew,trackPhiNew;
- TString chname;
- Double_t eps, b1, b2;
- Int_t ierflg;
-
- gAliRICHminuit = new TMinuit(2);
- gAliRICHminuit->SetObjectFit((TObject *)this);
- gAliRICHminuit->SetFCN(fcnrecon);
- gAliRICHminuit->mninit(5,10,7);
-
- vstart[0] = (Double_t)GetTrackTheta();
- vstart[1] = (Double_t)GetTrackPhi();
-
- lower[0] = vstart[0] - 0.03;
- if(lower[0] < 0) lower[0] = 0.;
- upper[0] = vstart[0] + 0.03;
- lower[1] = vstart[1] - 0.03;
- upper[1] = vstart[1] + 0.03;
-
-
- gAliRICHminuit->mnparm(0,"theta",vstart[0],step[0],lower[0],upper[0],ierflag);
- gAliRICHminuit->mnparm(1," phi ",vstart[1],step[1],lower[1],upper[1],ierflag);
-
- arglist = -1;
-
- // gAliRICHminuit->FixParameter(0);
-
- gAliRICHminuit->SetPrintLevel(-1);
-// gAliRICHminuit->mnexcm("SET PRI",&arglist, 1, ierflag);
- gAliRICHminuit->mnexcm("SET NOGR",&arglist, 1, ierflag);
- gAliRICHminuit->mnexcm("SET NOW",&arglist, 1, ierflag);
- arglist = 1;
- gAliRICHminuit->mnexcm("SET ERR", &arglist, 1,ierflg);
- arglist = -1;
-
- // gAliRICHminuit->mnscan();
-
-// gAliRICHminuit->mnexcm("SIMPLEX",&arglist, 0, ierflag);
- gAliRICHminuit->mnexcm("MIGRAD",&arglist, 0, ierflag);
- gAliRICHminuit->mnexcm("EXIT" ,&arglist, 0, ierflag);
-
- gAliRICHminuit->mnpout(0,chname, trackThetaNew, eps , b1, b2, ierflg);
- gAliRICHminuit->mnpout(1,chname, trackPhiNew, eps , b1, b2, ierflg);
-
- //values after the fit...
- SetFittedTrackTheta((Float_t)trackThetaNew);
- SetFittedTrackPhi((Float_t)trackPhiNew);
-
- delete gAliRICHminuit;
-
-}
-
-void AliRICHRecon::EstimationOfTheta()
-{
- // theta estimate
-
- Int_t nPhotons = 0;
-
- Float_t shiftX = GetShiftX();
- Float_t shiftY = GetShiftY();
-
- Float_t *candidatePhotonX = GetCandidatePhotonX();
- Float_t *candidatePhotonY = GetCandidatePhotonY();
-
- Int_t nPhotonsCandidates = GetCandidatePhotonsNumber();
-
- // cout << "MINIM: Nphotons " << nPhotonsCandidates << endl;
-
- for (Int_t j=0; j < nPhotonsCandidates; j++)
- {
-
- SetPhotonIndex(j);
-
- if(!GetPhotonFlag()) continue;
-
- Float_t xtoentr = candidatePhotonX[j] - shiftX;
- Float_t ytoentr = candidatePhotonY[j] - shiftY;
-
- SetEntranceX(xtoentr);
- SetEntranceY(ytoentr);
-
- FindPhiPoint();
-
- FindThetaPhotonCerenkov();
-
- Float_t thetaPhotonCerenkov = GetThetaPhotonCerenkov();
-
- // cout << " ACCEPTED!!! " << thetaPhotonCerenkov << endl;
-
- SetPhotonEta(thetaPhotonCerenkov);
-
- nPhotons++;
-
- }
-
- Float_t xmean = 0.;
- Float_t x2mean = 0.;
- Int_t nev = 0;
-
- for (Int_t j=0; j < nPhotonsCandidates;j++)
- {
- SetPhotonIndex(j);
-
- Float_t eta = GetPhotonEta();
-
- if(eta != -999.)
- {
- if(GetPhotonFlag() == 2)
- {
- xmean += eta;
- x2mean += eta*eta;
- nev++;
- }
- }
- }
-
- if(nev > 0)
- {
- xmean /=(Float_t)nev;
- x2mean /=(Float_t)nev;
- } else {
- xmean = 0.;
- x2mean = 0.;
- }
-
- Float_t vRMS = sqrt(x2mean - xmean*xmean);
-
- // cout << " RMS " << vRMS;
-
- SetEstimationOfTheta(xmean);
- SetEstimationOfThetaRMS(vRMS);
-}
-
-void fcnrecon(Int_t& /*npar*/, Double_t* /*gin*/, Double_t &f, Double_t *par, Int_t)
-{
- // function to be minimized
- AliRICHRecon *gMyRecon = (AliRICHRecon*)gAliRICHminuit->GetObjectFit();
-
- Float_t p0 = (Float_t)par[0];
- Float_t p1 = (Float_t)par[1];
-
- gMyRecon->SetTrackTheta(p0);
- gMyRecon->SetTrackPhi(p1);
-
- gMyRecon->EstimationOfTheta();
- Float_t vRMS = gMyRecon->GetEstimationOfThetaRMS();
-
- Int_t houghPhotons = gMyRecon->GetHoughPhotons();
-
-
- f = (Double_t)(1000*vRMS/(Float_t)houghPhotons);
-
-// if(fDebug) cout << " f " << f
-// << " theta " << par[0] << " phi " << par[1]
-// << " HoughPhotons " << houghPhotons << endl;
-//
-// if(fDebug&&iflag == 3)
-// {
-// cout << " --- end convergence...summary --- " << endl;
-// cout << " theta " << par[0] << endl;
-// cout << " phi " << par[1] << endl;
-// }
-}
-
-void AliRICHRecon::Waiting()
-{
- // wait, wait....
- if(!fIsDISPLAY) return;
- cout << " Press any key to continue...";
-
-// gSystem->ProcessEvents();
- getchar();
-
- cout << endl;
-
- return;
-}
-
+ return iInsideCnt;
+}//FlagPhotons
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff