// for single chamber //
//////////////////////////////////////////////////////////////////////////
-#include "AliHMPIDRecon.h" //class header
+#include "AliHMPIDRecon.h" //class header
+#include "AliHMPIDParam.h" //CkovAngle()
#include "AliHMPIDCluster.h" //CkovAngle()
-#include <TRotation.h> //TracePhoton()
-#include <TH1D.h> //HoughResponse()
-#include <TClonesArray.h> //CkovAngle()
-#include <AliESDtrack.h> //CkovAngle()
+#include <TRotation.h> //TracePhot()
+#include <TH1D.h> //HoughResponse()
+#include <TClonesArray.h> //CkovAngle()
+#include <AliESDtrack.h> //CkovAngle()
const Double_t AliHMPIDRecon::fgkRadThick=1.5;
const Double_t AliHMPIDRecon::fgkWinThick=0.5;
const Double_t AliHMPIDRecon::fgkWinIdx =1.5787;
const Double_t AliHMPIDRecon::fgkGapIdx =1.0005;
-Double_t xRad;
-Double_t yRad;
-
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
AliHMPIDRecon::AliHMPIDRecon():TTask("RichRec","RichPat"),
fRadNmean(1.292),
}
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-void AliHMPIDRecon::CkovAngle(Double_t xRa,Double_t yRa,AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean)
+void AliHMPIDRecon::CkovAngle(AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean)
{
// Pattern recognition method based on Hough transform
// Arguments: pTrk - track for which Ckov angle is to be found
// pCluLst - list of clusters for this chamber
// Returns: - track ckov angle, [rad],
+
+ AliHMPIDParam *pParam=AliHMPIDParam::Instance();
- if(pCluLst->GetEntries()>200) fIsWEIGHT = kTRUE; // offset to take into account bkg in reconstruction
- else fIsWEIGHT = kFALSE;
+ if(pCluLst->GetEntries()>pParam->MultCut()) fIsWEIGHT = kTRUE; // offset to take into account bkg in reconstruction
+ else fIsWEIGHT = kFALSE;
- // Photon Flag: Flag = 0 initial set; Flag = 1 good candidate (charge compatible with photon); Flag = 2 photon used for the ring;
- Float_t xPc,yPc,th,ph; pTrk->GetHMPIDtrk(xPc,yPc,th,ph); SetTrack(xPc,yPc,th,ph); //initialize this track
+ Float_t xRa,yRa,th,ph;
+ pTrk->GetHMPIDtrk(xRa,yRa,th,ph); //initialize this track: th and ph angles at middle of RAD
+
+ ph+=TMath::Pi(); // right XYZ local orientation
+ SetTrack(xRa,yRa,th,ph);
+
fRadNmean=nmean;
- xRad=xRa;yRad=yRa;
-
Float_t dMin=999,mipX=-1,mipY=-1;Int_t chId=-1,mipId=-1,mipQ=-1;
fPhotCnt=0;
for (Int_t iClu=0; iClu<pCluLst->GetEntriesFast();iClu++){//clusters loop
AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluLst->UncheckedAt(iClu); //get pointer to current cluster
chId=pClu->Ch();
- if(pClu->Q()>100){ //charge compartible with MIP clusters
- Float_t dX=xPc-pClu->X(),dY=yPc-pClu->Y(),d =TMath::Sqrt(dX*dX+dY*dY); //distance between current cluster and intersection point
- if( d < dMin) {mipId=iClu; dMin=d;mipX=pClu->X();mipY=pClu->Y();mipQ=(Int_t)pClu->Q();}//current cluster is closer, overwrite data for min cluster
- }else{ //charge compartible with photon cluster
- fPhotCkov[fPhotCnt]=FindPhotCkov(pClu->X(),pClu->Y()); //find ckov angle for this photon candidate
- fPhotCnt++; //increment counter of photon candidates
+ if(pClu->Q()>pParam->QCut()){ //charge compartible with MIP clusters
+ Float_t dX=fPc.X()-pClu->X(),dY=fPc.Y()-pClu->Y(),d =TMath::Sqrt(dX*dX+dY*dY); //distance between current cluster and intersection point
+ if( d < dMin) {mipId=iClu; dMin=d;mipX=pClu->X();mipY=pClu->Y();mipQ=(Int_t)pClu->Q();} //current cluster is closer, overwrite data for min cluster
+ }else{ //charge compatible with photon cluster
+ Double_t thetaCer,phiCer;
+ if(FindPhotCkov(pClu->X(),pClu->Y(),thetaCer,phiCer)){ //find ckov angle for this photon candidate
+ fPhotCkov[fPhotCnt]=thetaCer; //actual theta Cerenkov (in TRS)
+ fPhotPhi [fPhotCnt]=phiCer-TMath::Pi(); //actual phi Cerenkov (in TRS): -pi to come back to "unusual" ref system (X,Y,-Z)
+ fPhotCnt++; //increment counter of photon candidates
+ }
}
}//clusters loop
- Int_t iNacc=FlagPhot(HoughResponse()); //flag photons according to individual theta ckov with respect to most probable
-
- pTrk->SetHMPIDmip (mipX,mipY,mipQ,iNacc); //store mip info
-
- if(mipId==-1) {pTrk->SetHMPIDsignal (kMipQdcCut); return;} //no clusters with QDC more the threshold at all
- if(dMin>1) {pTrk->SetHMPIDsignal (kMipDistCut); return;} //closest cluster with enough charge is still too far from intersection
- pTrk->SetHMPIDcluIdx(chId,mipId);
- if(iNacc<1) pTrk->SetHMPIDsignal(kNoPhotAccept); //no photon candidates is accepted
- else pTrk->SetHMPIDsignal(FindRingCkov(pCluLst->GetEntries())); //find best Theta ckov for ring i.e. track
+ Int_t iNacc=FlagPhot(HoughResponse()); //flag photons according to individual theta ckov with respect to most probable
+ pTrk->SetHMPIDmip(mipX,mipY,mipQ,iNacc); //store mip info
+
+ if(mipId==-1) {pTrk->SetHMPIDsignal(kMipQdcCut); return;} //no clusters with QDC more the threshold at all
+ if(dMin>pParam->DistCut()) {pTrk->SetHMPIDsignal(kMipDistCut); return;} //closest cluster with enough charge is still too far from intersection
+ pTrk->SetHMPIDcluIdx(chId,mipId); //set index of cluster
+ if(iNacc<1) pTrk->SetHMPIDsignal(kNoPhotAccept); //no photon candidates is accepted
+ else pTrk->SetHMPIDsignal(FindRingCkov(pCluLst->GetEntries())); //find best Theta ckov for ring i.e. track
- pTrk->SetHMPIDchi2(fCkovSigma2); //error squared
+ pTrk->SetHMPIDchi2(fCkovSigma2); //errors squared
}//ThetaCerenkov()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Double_t AliHMPIDRecon::FindPhotCkov(Double_t cluX,Double_t cluY)
+Bool_t AliHMPIDRecon::FindPhotCkov(Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer)
{
// Finds Cerenkov angle for this photon candidate
// Arguments: cluX,cluY - position of cadidate's cluster
-// Returns: Cerenkov angle
+// Returns: Cerenkov angle
- TVector2 pos(cluX,cluY); Double_t cluR=(pos-fTrkPos).Mod(); Double_t phi=FindPhotPhi(cluX,cluY);
- Double_t ckov1=0,ckov2=0.75;
- const Double_t kTol=0.05;
+ TVector3 dirCkov;
+
+ Double_t zRad=-0.5*AliHMPIDRecon::fgkRadThick
+ -AliHMPIDRecon::fgkWinThick
+ -AliHMPIDRecon::fgkGapThick; //z position of middle of RAD
+
+ TVector3 rad(fTrkPos.X(),fTrkPos.Y(),zRad); //impact point at middle of RAD
+ TVector3 pc(cluX,cluY,0); //mip at PC: z=0 @ PC
+ Double_t cluR = TMath::Sqrt((cluX-fTrkPos.X())*(cluX-fTrkPos.X())+
+ (cluY-fTrkPos.Y())*(cluY-fTrkPos.Y()));//ref. distance impact RAD-CLUSTER
+ Double_t phi=(pc-rad).Phi(); //phi of photon
+
+ Double_t ckov1=0,ckov2=0.75+fTrkDir.Theta(); //start to find theta cerenkov in DRS
+ const Double_t kTol=0.01;
Int_t iIterCnt = 0;
while(1){
- if(iIterCnt>=50) return -1;
+ if(iIterCnt>=50) return kFALSE;
Double_t ckov=0.5*(ckov1+ckov2);
- Double_t dist=cluR-TracePhot(xRad,yRad,ckov,phi,pos); iIterCnt++; //get distance between trial point and cluster position
+ dirCkov.SetMagThetaPhi(1,ckov,phi);
+ TVector2 posC=TraceForward(dirCkov); //trace photon with actual angles
+ Double_t dist=cluR-(posC-fTrkPos).Mod(); //get distance between trial point and cluster position
+ if(posC.X()==-999) dist = - 999; //total reflection problem
+ iIterCnt++; //counter step
if (dist> kTol) ckov1=ckov; //cluster @ larger ckov
else if(dist<-kTol) ckov2=ckov; //cluster @ smaller ckov
- else return ckov; //precision achived
+ else{ //precision achived: ckov in DRS found
+ dirCkov.SetMagThetaPhi(1,ckov,phi); //
+ RecPhot(dirCkov,thetaCer,phiCer); //find ckov (in TRS:the effective Cherenkov angle!)
+ return kTRUE;
+ }
}
}//FindPhotTheta()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Double_t AliHMPIDRecon::FindPhotPhi(Double_t cluX,Double_t cluY)
+TVector2 AliHMPIDRecon::TraceForward(TVector3 dirCkov)const
{
-// Finds phi angle og photon candidate by considering the cluster's position of this candudate w.r.t track position
-
-// Double_t emiss=0;
-// return fPhotPhi[fPhotCnt]=TMath::ATan2(cluY-fTrkPos.Y()-emiss*TMath::Tan(fTrkDir.Theta())*TMath::Sin(fTrkDir.Phi()),
-// cluX-fTrkPos.X()-emiss*TMath::Tan(fTrkDir.Theta())*TMath::Cos(fTrkDir.Phi()));
- return fPhotPhi[fPhotCnt]=TMath::ATan2(cluY-yRad,cluX-xRad)-(TMath::Pi()+fTrkDir.Phi());
+ //Trace forward a photon from (x,y) up to PC
+ // Arguments: dirCkov photon vector in LORS
+ // Returns: pos of traced photon at PC
+ TVector2 pos(-999,-999);
+ if(dirCkov.Theta() > TMath::ASin(1./fRadNmean)) return pos; //total refraction on WIN-GAP boundary
+ Double_t zRad=-0.5*AliHMPIDRecon::fgkRadThick
+ -AliHMPIDRecon::fgkWinThick
+ -AliHMPIDRecon::fgkGapThick; //z position of middle of RAD
+ TVector3 posCkov(fTrkPos.X(),fTrkPos.Y(),zRad); //RAD: photon position is track position @ middle of RAD
+ Propagate(dirCkov,posCkov,-fgkWinThick-fgkGapThick); //go to RAD-WIN boundary
+ Refract (dirCkov, fRadNmean,fgkWinIdx ); //RAD-WIN refraction
+ Propagate(dirCkov,posCkov, -fgkGapThick); //go to WIN-GAP boundary
+ Refract (dirCkov, fgkWinIdx,fgkGapIdx ); //WIN-GAP refraction
+ Propagate(dirCkov,posCkov, 0); //go to PC
+ pos.Set(posCkov.X(),posCkov.Y());
+ return pos;
+}//TraceForward()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+void AliHMPIDRecon::RecPhot(TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer)
+{
+ //Theta Cerenkov reconstruction
+ // Arguments: (x,y) of initial point in LORS, dirCkov photon vector in LORS
+ // Returns: thetaCer theta cerenkov reconstructed
+// TVector3 dirTrk;
+// dirTrk.SetMagThetaPhi(1,fTrkDir.Theta(),fTrkDir.Phi());
+// Double_t thetaCer = TMath::ACos(dirCkov*dirTrk);
+ TRotation mtheta; mtheta.RotateY(- fTrkDir.Theta());
+ TRotation mphi; mphi.RotateZ(- fTrkDir.Phi());
+ TRotation mrot=mtheta*mphi;
+ TVector3 dirCkovTRS;
+ dirCkovTRS=mrot*dirCkov;
+ phiCer = dirCkovTRS.Phi(); //actual value of the phi of the photon
+ thetaCer= dirCkovTRS.Theta(); //actual value of thetaCerenkov of the photon
}
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Double_t AliHMPIDRecon::FindRingArea(Double_t ckovAng)const
{
// Find area inside the cerenkov ring which lays inside PCs
-// Arguments: ckovThe - cernkov
+// Arguments: ckovAng - cerenkov angle
// Returns: area of the ring in cm^2 for given theta ckov
-
- TVector2 pos1,pos2;
-
const Int_t kN=100;
Double_t area=0;
for(Int_t i=0;i<kN;i++){
- TracePhot(xRad,yRad,ckovAng,Double_t(TMath::TwoPi()*i /kN),pos1);//trace this photon
- TracePhot(xRad,yRad,ckovAng,Double_t(TMath::TwoPi()*(i+1)/kN),pos2);//trace this photon
- area+=(pos1-fTrkPos)*(pos2-fTrkPos);
+ TVector2 pos1=TracePhot(ckovAng,Double_t(TMath::TwoPi()*i /kN));//trace this photon
+ TVector2 pos2=TracePhot(ckovAng,Double_t(TMath::TwoPi()*(i+1)/kN));//trace the next photon
+ area+=(pos1-fTrkPos)*(pos2-fTrkPos); //add area of the triangle...
}
return area;
}//FindRingArea()
for(Int_t i=0;i<fPhotCnt;i++){//candidates loop
if(fPhotFlag[i] == 2){
- if(fPhotCkov[i]<=0) continue;//?????????????????Flag photos = 2 may imply CkovEta = 0??????????????
- if(fPhotCkov[i]<ckovMin) ckovMin=fPhotCkov[i]; //find max and min Theta ckov from all candidates within probable window
+ if(fPhotCkov[i]<ckovMin) ckovMin=fPhotCkov[i]; //find max and min Theta ckov from all candidates within probable window
if(fPhotCkov[i]>ckovMax) ckovMax=fPhotCkov[i];
- weightThetaCerenkov += fPhotCkov[i]*fPhotWei[i]; wei += fPhotWei[i]; //collect weight as sum of all candidate weghts
+ weightThetaCerenkov += fPhotCkov[i]*fPhotWei[i];
+ wei += fPhotWei[i]; //collect weight as sum of all candidate weghts
sigma2 += 1./Sigma2(fPhotCkov[i],fPhotPhi[i]);
}
// Arguments: ckov- value of most probable ckov angle for track as returned by HoughResponse()
// Returns: number of photon candidates happened to be inside the window
+// Photon Flag: Flag = 0 initial set;
+// Flag = 1 good candidate (charge compatible with photon);
+// Flag = 2 photon used for the ring;
Int_t steps = (Int_t)((ckov )/ fDTheta); //how many times we need to have fDTheta to fill the distance between 0 and thetaCkovHough
return iInsideCnt;
}//FlagPhot()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Double_t AliHMPIDRecon::TracePhot(Double_t x,Double_t y,Double_t ckovThe,Double_t ckovPhi,TVector2 &pos)const
+TVector2 AliHMPIDRecon::TracePhot(Double_t ckovThe,Double_t ckovPhi)const
{
// Trace a single Ckov photon from emission point somewhere in radiator up to photocathode taking into account ref indexes of materials it travereses
-// Arguments: ckovThe,ckovPhi- photon ckov angles, [rad] (warning: not photon theta and phi)
+// Arguments: ckovThe,ckovPhi- photon ckov angles in DRS, [rad]
// Returns: distance between photon point on PC and track projection
TRotation mtheta; mtheta.RotateY(fTrkDir.Theta());
TRotation mphi; mphi.RotateZ(fTrkDir.Phi());
TRotation mrot=mphi*mtheta;
-// TVector3 posCkov(fTrkPos.X(),fTrkPos.Y(),-0.5*fgkRadThick-fgkWinThick-fgkGapThick); //RAD: photon position is track position @ middle of RAD
- TVector3 posCkov(x,y,-0.5*fgkRadThick-fgkWinThick-fgkGapThick); //RAD: photon position is track position @ middle of RAD
- TVector3 dirCkov,dirCkovTors; dirCkovTors.SetMagThetaPhi(1,ckovThe,ckovPhi); //initially photon is directed according to requested ckov angle
- dirCkov=mrot*dirCkovTors; //now we know photon direction in LORS
-// dirCkov.SetPhi(ckovPhi);
- if(dirCkov.Theta() > TMath::ASin(1./fRadNmean)) return -999;//total refraction on WIN-GAP boundary
- Propagate(dirCkov,posCkov,-fgkWinThick-fgkGapThick); //go to RAD-WIN boundary
- Refract (dirCkov, fRadNmean,fgkWinIdx ); //RAD-WIN refraction
- Propagate(dirCkov,posCkov, -fgkGapThick); //go to WIN-GAP boundary
- Refract (dirCkov, fgkWinIdx,fgkGapIdx ); //WIN-GAP refraction
- Propagate(dirCkov,posCkov, 0); //go to PC
- pos.Set(posCkov.X(),posCkov.Y());
- return (pos-fTrkPos).Mod();
-}//TracePhoton()
+ TVector3 dirCkov,dirCkovTors;
+
+ dirCkovTors.SetMagThetaPhi(1,ckovThe,ckovPhi); //initially photon is directed according to requested ckov angle
+ dirCkov=mrot*dirCkovTors; //now we know photon direction in LORS
+ return TraceForward(dirCkov);
+}//TracePhot()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-void AliHMPIDRecon::Propagate(const TVector3 &dir,TVector3 &pos,Double_t z)const
+void AliHMPIDRecon::Propagate(const TVector3 dir,TVector3 &pos,Double_t z)const
{
// Finds an intersection point between a line and XY plane shifted along Z.
// Arguments: dir,pos - vector along the line and any point of the line
virtual ~AliHMPIDRecon() {}
- void CkovAngle (Double_t xRa,Double_t yRa,AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean); //reconstructed Theta Cerenkov
- Double_t FindPhotCkov (Double_t cluX,Double_t cluY ); //find ckov angle for single photon candidate
- Double_t FindPhotPhi (Double_t cluX,Double_t cluY ); //find phi angle for single photon candidate
+ void CkovAngle (AliESDtrack *pTrk,TClonesArray *pCluLst,Double_t nmean ); //reconstructed Theta Cerenkov
+ Bool_t FindPhotCkov (Double_t cluX,Double_t cluY,Double_t &thetaCer,Double_t &phiCer ); //find ckov angle for single photon candidate
Double_t FindRingCkov (Int_t iNclus ); //best ckov for ring formed by found photon candidates
Double_t FindRingArea (Double_t ckov )const;//estimated area of ring in cm^2
Int_t FlagPhot (Double_t ckov ); //is photon ckov near most probable track ckov
Double_t HoughResponse( ); //most probable track ckov angle
- void Propagate (const TVector3 &dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
+ void Propagate (const TVector3 dir, TVector3 &pos,Double_t z )const;//propagate photon alogn the line
void Refract ( TVector3 &dir, Double_t n1, Double_t n2)const;//refract photon on the boundary
- Double_t TracePhot (Double_t x,Double_t y,Double_t ckovTh,Double_t ckovPh,TVector2 &pos)const;//trace photon created by track to PC
- void SetTrack (Double_t x,Double_t y,Double_t theta,Double_t phi ){fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(x,y);}//set track
+ TVector2 TracePhot (Double_t ckovTh,Double_t ckovPh )const;//trace photon created by track to PC
+ TVector2 TraceForward (TVector3 dirCkov )const;//tracing forward a photon from (x,y) to PC
+ void RecPhot (TVector3 dirCkov,Double_t &thetaCer,Double_t &phiCer ); //theta,phi cerenkov reconstructed
+ void SetTrack (Double_t xRad,Double_t yRad,Double_t theta,Double_t phi )
+ {fTrkDir.SetMagThetaPhi(1,theta,phi); fTrkPos.Set(xRad,yRad);} //set track parameter at RAD
+ void SetImpPC (Double_t xPc,Double_t yPc )
+ {fPc.Set(xPc,yPc);} //set track impact to PC
Double_t SigLoc (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to cathode segmetation
Double_t SigGeom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknown photon origin
Double_t SigCrom (Double_t ckovTh,Double_t ckovPh,Double_t beta )const;//error due to unknonw photon energy
Float_t fDTheta; // Step for sliding window
Float_t fWindowWidth; // Hough width of sliding window
- TVector3 fTrkDir; //track direction in LORS
- TVector2 fTrkPos; //track positon in LORS at the middle of radiator
+ TVector3 fTrkDir; //track direction in LORS at RAD
+ TVector2 fTrkPos; //track positon in LORS at RAD
+ TVector2 fPc; //track position at PC
ClassDef(AliHMPIDRecon,0)
};
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Int_t AliHMPIDTracker::Recon(AliESD *pEsd,TObjArray *pCluAll,TObjArray *pNmean)
{
-// Interface callback methode invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event
+// Interface callback method invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event
// Arguments: pEsd - pointer to Event Summary Data class instance which contains a list of tracks
// Returns: error code, 0 if no errors
Int_t iNtracks=pEsd->GetNumberOfTracks(); AliDebugClass(1,Form("Start with %i tracks",iNtracks));
-
AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor
- Float_t xRa,yRa;
+ Double_t xPc,yPc;
for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){ //ESD tracks loop
AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get next reconstructed track
- Int_t cham=IntTrkCha(pTrk,xRa,yRa); //get chamber intersected by thie track
+ Int_t cham=IntTrkCha(pTrk,xPc,yPc); //get chamber intersected by this track
if(cham<0) continue; //no intersection at all, go after next track
- Double_t nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
- recon.CkovAngle((Double_t)xRa,(Double_t)yRa,pTrk,(TClonesArray *)pCluAll->At(cham),nmean); //search for Cerenkov angle for this track
+ Double_t nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
+ recon.SetImpPC(xPc,yPc); //store track impact to PC
+ recon.CkovAngle(pTrk,(TClonesArray *)pCluAll->At(cham),nmean); //search for Cerenkov angle of this track
} //ESD tracks loop
AliDebugClass(1,"Stop pattern recognition");
return 0; // error code: 0=no error;
}//PropagateBack()
//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xRa,Float_t &yRa)
+Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Double_t &xToPc,Double_t &yToPc)
{
// Static method to find intersection in between given track and HMPID chambers
// Arguments: pTrk - ESD track
-// xRa,yRa - track intersection with the middle of radiator, LORS
+// xPc,yPc - track intersection with PC, LORS
// Returns: intersected chamber ID or -1
AliHMPIDParam *pParam=AliHMPIDParam::Instance();
- Float_t xPc=0,yPc=0,theta=0,phi=0; //track intersection point and angles, LORS
- for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++){ //chambers loop
+ Float_t xRa=0,yRa=0,xPc=0,yPc=0,theta=0,phi=0; //track intersection point and angles, LORS
+ for(Int_t i=AliHMPIDDigit::kMinCh;i<=AliHMPIDDigit::kMaxCh;i++){ //chambers loop
Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliHMPIDParam::kRad); //point & norm for RAD
Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliHMPIDParam::kPc); //point & norm for PC
if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator
if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC
- pParam->Mars2LorsVec(i,n1,theta,phi); //track angles
+ pParam->Mars2LorsVec(i,n1,theta,phi); //track angles at RAD
pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position
pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position
-
- if(AliHMPIDDigit::IsInside(xPc,yPc)==kFALSE) continue; //not in active area
- pTrk->SetHMPIDtrk (xPc,yPc,theta,phi); //store track intersection info
+ xToPc=(Double_t)xPc;yToPc=(Double_t)yPc; //conversion float->double only
+ if(AliHMPIDDigit::IsInside(xPc,yPc,pParam->DistCut())==kFALSE) continue; //not in active area
+ pTrk->SetHMPIDtrk (xRa,yRa,theta,phi); //store track intersection info
pTrk->SetHMPIDcluIdx (i,0);
return i;
} //chambers loop
AliHMPIDRecon rec;
- Int_t hc=0; TVector2 pos;
+ Int_t hc=0;
for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){//tracks loop
AliESDtrack *pTrk=pEsd->GetTrack(iTrk);
Float_t xRa,yRa;
rec.SetTrack(xRa,yRa,theta,phi);
if(!AliHMPIDDigit::IsInDead(xPc,yPc)) new((*pHits)[hc++]) AliHMPIDHit(ch,200e-9,kProton ,iTrk,xPc,yPc); //mip hit
- /*
- for(int i=0;i<4;i++) {
- Float_t x=gRandom->Rndm()*130;Float_t y=gRandom->Rndm()*126;
- if(!AliHMPIDDigit::IsInDead(x,y)) new((*pHits)[hc++]) AliHMPIDHit(ch,7.5e-9,kFeedback,iTrk,x,y); //bkg hits 4 per track
- }
- */
Int_t nPhots = (Int_t)(20.*TMath::Power(TMath::Sin(ckov),2)/TMath::Power(TMath::Sin(TMath::ACos(1./1.292)),2));
for(int i=0;i<nPhots;i++){
- rec.TracePhot(ckov,gRandom->Rndm()*TMath::TwoPi(),pos);
+ TVector2 pos;
+ pos=rec.TracePhot(ckov,gRandom->Rndm()*TMath::TwoPi());
if(!AliHMPIDDigit::IsInDead(pos.X(),pos.Y())) new((*pHits)[hc++]) AliHMPIDHit(ch,7.5e-9,kCerenkov,iTrk,pos.X(),pos.Y());
} //photon hits
}//tracks loop
Int_t ch=pTrk->GetHMPIDcluIdx();
if(ch<0) continue; //this track does not hit HMPID
ch/=1000000;
- Float_t th,ph,xPc,yPc; pTrk->GetHMPIDtrk(xPc,yPc,th,ph); //get info on current track
- pTxC[ch]->SetNextPoint(xPc,yPc); //add new intersection point
+ Float_t th,ph,xRad,yRad; pTrk->GetHMPIDtrk(xRad,yRad,th,ph);//get info on current track
+// pTxC[ch]->SetNextPoint(xPc,yPc); //add new intersection point TEMPORARLY DISABLED...no more available in ESD!
Float_t ckov=pTrk->GetHMPIDsignal(); Float_t err=TMath::Sqrt(pTrk->GetHMPIDchi2());
if(ckov>0){
Printf("theta %f phi %f ckov %f",th*TMath::RadToDeg(),ph*TMath::RadToDeg(),ckov);
- rec.SetTrack(xPc,yPc,th,ph+TMath::Pi());
- TVector2 pos;
- Double_t allGapz=rec.fgkWinThick+0.5*rec.fgkRadThick+rec.fgkGapThick; //to semplify, the (x,y) are calculted from (xPc,yPc) back to radiator in straight line (Bz=0)
- TVector3 dir(0,0,-1);TVector3 miprad(xPc,yPc,allGapz);
- AliHMPIDRecon::Propagate(dir,miprad,0);
- Double_t xRad=miprad.X();
- Double_t yRad=miprad.Y();
- for(int j=0;j<100;j++){
- rec.TracePhot(xRad,yRad,ckov,j*0.0628,pos);
+ rec.SetTrack(xRad,yRad,th,ph+TMath::Pi());
+ for(Int_t j=0;j<100;j++){
+ TVector2 pos;
+ pos=rec.TracePhot(ckov,j*0.0628);
if(!AliHMPIDDigit::IsInDead(pos.X(),pos.Y())) pRin[ch]->SetNextPoint(pos.X(),pos.Y());
}
}
git://git.uio.no / u/mrichter/AliRoot.git / commitdiff