Comment...uncomment...
[u/mrichter/AliRoot.git] / HMPID / AliHMPIDTracker.cxx
index 080fc77..4b79e46 100644 (file)
@@ -1,6 +1,8 @@
 #include "AliHMPIDTracker.h"     //class header
+#include "AliHMPIDtrack.h"       //class header
 #include "AliHMPIDCluster.h"     //GetTrackPoint(),PropagateBack() 
 #include "AliHMPIDParam.h"       //GetTrackPoint(),PropagateBack()
+#include "AliHMPIDPid.h"         //Recon(),reconHTA()
 #include "AliHMPIDRecon.h"       //Recon()
 #include "AliHMPIDReconHTA.h"    //ReconHTA()
 #include <AliESDEvent.h>         //PropagateBack(),Recon()  
@@ -37,12 +39,15 @@ Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
 //   Returns: status of operation  if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track. 
   if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
   Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
-  point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham-1));//layer and chamber number
+  iClu = iClu%1000; //GetHMPIDcluIdx -> 1e+6*ch + 1e+3*clusize + cluIdx;
+  point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham));//layer and chamber number
   TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
   AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
-  Double_t mars[3];
-  AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars);
-  point.SetXYZ(mars[0],mars[1],mars[2]);
+  Float_t xyz[3];
+  pClu->GetGlobalXYZ(xyz);
+  Float_t cov[6];
+  pClu->GetGlobalCov(cov);
+  point.SetXYZ(xyz,cov);
   return kTRUE;
 }//GetTrackPoint()
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
@@ -51,20 +56,36 @@ Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Flo
 // Static method to find intersection in between given track and HMPID chambers
 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
 //   Returns: intersected chamber ID or -1
-  AliHMPIDParam *pParam=AliHMPIDParam::Instance();
+  AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching 
   for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){                              //chambers loop
-    Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Point(i,p1,AliHMPIDParam::kRad);          //point & norm  for middle of radiator plane
-    Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Point(i,p2,AliHMPIDParam::kPc);           //point & norm  for entrance to PC plane
-    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 at RAD
-    pParam->Mars2Lors   (i,p1,xRa,yRa);                                                         //TRKxRAD position
-    pParam->Mars2Lors   (i,p2,xPc,yPc);                                                         //TRKxPC position
-    if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return i;                     //return intersected chamber  
+    Int_t chInt = IntTrkCha(i,hmpTrk,xPc,yPc,xRa,yRa,theta,phi);
+    if(chInt>=0) {delete hmpTrk;hmpTrk=0x0;return chInt;}
   }                                                                                             //chambers loop
+  delete hmpTrk; hmpTrk=0x0;
   return -1;                                                                                    //no intersection with HMPID chambers
 }//IntTrkCha()
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+Int_t AliHMPIDTracker::IntTrkCha(Int_t ch,AliHMPIDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
+{
+// Static method to find intersection in between given track and HMPID chambers
+// Arguments: pTrk- HMPID track; xPc,yPc- track intersection with PC in LORS [cm]
+//   Returns: intersected chamber ID or -1
+    AliHMPIDParam *pParam=AliHMPIDParam::Instance();
+    Double_t p1[3],n1[3]; 
+    pParam->Norm(ch,n1); 
+    pParam->Point(ch,p1,AliHMPIDParam::kRad);                                                    //point & norm  for middle of radiator plane
+    Double_t p2[3],n2[3]; 
+    pParam->Norm(ch,n2);
+    pParam->Point(ch,p2,AliHMPIDParam::kPc);                                                     //point & norm  for entrance to PC plane
+    if(pTrk->Intersect(pTrk,p1,n1)==kFALSE) return -1;                                           //try to intersect track with the middle of radiator
+    if(pTrk->Intersect(pTrk,p2,n2)==kFALSE) return -1;   
+    pParam->Mars2LorsVec(ch,n1,theta,phi);                                                       //track angles at RAD
+    pParam->Mars2Lors   (ch,p1,xRa,yRa);                                                         //TRKxRAD position
+    pParam->Mars2Lors   (ch,p2,xPc,yPc);                                                         //TRKxPC position
+    if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return ch;                     //return intersected chamber  
+  return -1;                                                                                     //no intersection with HMPID chambers
+}//IntTrkCha()
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
 {
 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
@@ -93,62 +114,278 @@ Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmea
 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
 //   Returns: error code, 0 if no errors   
-  AliHMPIDRecon recon;                                                                       //instance of reconstruction class, nothing important in ctor
+  
+  AliHMPIDRecon recon;                                                                           //instance of reconstruction class, nothing important in ctor
   Float_t xPc,yPc,xRa,yRa,theta,phi;
-  for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                       //ESD tracks loop
-    AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                    //get reconstructed track    
-    Int_t cham=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);                                        //get chamber intersected by this track 
-    if(cham<0) {                                                                                 //no intersection at all, go after next track
+  Double_t cluLORS[2]={0};
+//  Double_t cluMARS[3]={0},trkMARS[3]={0};
+//  Double_t bestcluMARS[3]={0,0,0};
+//  Double_t radClu,radInitTrk;   
+  Int_t nMipClusTot=0;
+//  Double_t d3d=0;
+  Double_t qthre = 0;   Double_t nmean=0; Int_t hvsec=0;
+  Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
+  
+  AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
+  
+  for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
+    
+//    Double_t bestChi2=99999;chi2=99999;                                                          //init. track matching params
+    Double_t dmin=999999,bz=0;
+
+    Bool_t isOkDcut=kFALSE;
+    Bool_t isOkQcut=kFALSE;
+    Bool_t isMatched=kFALSE;
+    
+    AliHMPIDCluster *bestHmpCluster=0x0;                                                          //the best matching cluster
+    AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //get reconstructed track    
+    AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching 
+    bz=AliTracker::GetBz();  
+//initial flags for HMPID ESD infos    
+    pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
+    pTrk->SetHMPIDmip(0,0,0,0);                                                                //store mip info in any case 
+    pTrk->SetHMPIDcluIdx(99,99999);                                                            //chamber not found, mip not yet considered
+    pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
+    
+    Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);                                        //find the intersected chamber for this track 
+
+    if(ipCh<0) continue;                                                                         //no intersection at all, go after next track
+
+    pTrk->SetHMPIDtrk(xRa,yRa,theta,phi);                                                        //store initial infos
+    pTrk->SetHMPIDcluIdx(ipCh,9999);                                                             //set chamber, index of cluster + cluster size
+    
+// track intersects the chamber ipCh: find the MIP          
+    
+    TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
+    nMipClusTot = pMipCluLst->GetEntries();                                                     //total number of clusters in the given chamber
+    nClusCh[ipCh] = nMipClusTot;
+    
+    if(nMipClusTot==0) continue;                                                                         
+    
+    Int_t index=-1;                                                                             //index of the "best" matching cluster
+    
+    for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
+      
+      AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
+// evaluate qThre
+      if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {                                             // just for backward compatibility
+        qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(pEsd->GetTimeStamp());                          //
+      } else {                                                                                     // in the past just 1 qthre
+        hvsec = pParam->InHVSector(pClu->Y());                                              //  per chamber
+        if(hvsec>=0)
+         qthre=((TF1*)pQthre->At(6*ipCh+hvsec))->Eval(pEsd->GetTimeStamp());                      //
+      }                                                                                            //
+//
+      if(pClu->Q()<qthre) continue;                                                                      //charge compartible with MIP clusters      
+      isOkQcut = kTRUE;
+//
+      cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();                                            //get the LORS coordinates of the cluster
+      Double_t dist = TMath::Sqrt((xPc-cluLORS[0])*(xPc-cluLORS[0])+(yPc-cluLORS[1])*(yPc-cluLORS[1]));
+      
+      if(dist<dmin) {
+        dmin = dist;
+        index=iClu;
+        bestHmpCluster=pClu;
+      }
+    }
+/*            
+      pParam->Lors2Mars(ipCh,cluLORS[0],cluLORS[1],cluMARS);              //convert cluster coors. from LORS to MARS
+      radClu=TMath::Sqrt(cluMARS[0]*cluMARS[0]+cluMARS[1]*cluMARS[1]);                       //radial distance of candidate cluster in MARS                                          
+      Double_t trkx0[3]; 
+      hmpTrk->GetXYZ(trkx0);                                                                 //get track position in MARS
+      radInitTrk=TMath::Sqrt(trkx0[0]*trkx0[0]+trkx0[1]*trkx0[1]);
+      hmpTrk->PropagateToR(radClu,10);
+      hmpTrk->GetXYZ(trkx0);                                                                   //get track position in MARS
+      hmpTrk->GetXYZAt(radClu,bz,trkMARS);                                                     //get the track coordinates at the rad distance after prop. 
+      d3d=TMath::Sqrt((cluMARS[0]-trkMARS[0])*(cluMARS[0]-trkMARS[0])+(cluMARS[1]-trkMARS[1])*(cluMARS[1]-trkMARS[1])+(cluMARS[2]-trkMARS[2])*(cluMARS[2]-trkMARS[2]));
+      chi2=hmpTrk->GetPredictedChi2(pClu);
+      if(dmin > d3d ) {   +                                                                      //to be saved for the moment...
+        cluSiz = pClu->Size();
+        dmin=d3d;
+        bestHmpCluster=pClu;
+        index=iClu;
+        bestChi2=chi2;
+        cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();
+//        pParam->Lors2Mars(ipCh,cluLORS[0],cluLORS[1],bestcluMARS); 
+      }//global dmin cut 
+    }//clus loop
+*/
+    if(!isOkQcut) {
+      pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
+      continue;                                                                     
+    }
+              
+    Printf(" Track n. %i Chamber intersected %i dist %f index %i cluster ch %i",iTrk,ipCh,dmin,index,bestHmpCluster->Ch());
+
+    Int_t cluSiz = bestHmpCluster->Size();
+    pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0);  //store mip info in any case 
+    pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                             //set chamber, index of cluster + cluster size
+    
+    if(dmin < pParam->DistCut()) {
+      isOkDcut = kTRUE;
+    }
+
+    if(!isOkDcut) {
+      pTrk->SetHMPIDsignal(pParam->kMipDistCut);                                                //closest cluster with enough charge is still too far from intersection
+    }
+    
+    if(isOkQcut*isOkDcut) isMatched = kTRUE;                                                    // MIP-Track matched !!    
+    
+    if(!isMatched) continue;                                                                    // If matched continue...
+
+    Bool_t isOk = hmpTrk->Update(bestHmpCluster,0.1,0);
+    Printf(" status of thracking update %i",isOk);
+    if(!isOk) continue;
+    pTrk->SetOuterParam(hmpTrk,AliESDtrack::kHMPIDout);                 
+    Printf("ok for reconstruction...");
+    
+    /*    
+    Int_t indexAll = 0;
+    for(Int_t iC=0;iC<ipCh;iC++) indexAll+=nClusCh[iC]; indexAll+=index;                        //to be verified...
+
+    Bool_t isOk = hmpTrk->Update(bestHmpCluster,bestChi2,indexAll);
+    if(!isOk) continue;
+    pTrk->SetOuterParam(hmpTrk,AliESDtrack::kHMPIDout);                 
+
+    cham=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);
+    
+    if(cham<0) {                                                                                  //no intersection at all, go after next track
       pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
       pTrk->SetHMPIDcluIdx   (99,99999);                                                         //chamber not found, mip not yet considered
       pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
       continue;                                                                         
     }
-    pTrk->SetHMPIDtrk(xRa,yRa,theta,phi);                                                        //store initial infos
-    Double_t nmean;
-    if(pNmean->GetEntries()==21) {                                                               //for backward compatibility
-       nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp());                             //C6F14 Nmean for this chamber
-     } else {
-       Int_t iRad     = AliHMPIDParam::Radiator(yRa);                                            //evaluate the radiator involved
-       if(iRad < 0) {
-        nmean = -1;
-       } else {
-        //AliDebug(1,"\n track didn' t pass through the radiator \n");                           //check track passage through the radiators
-       Double_t tLow  = ((TF1*)pNmean->At(6*cham+2*iRad  ))->Eval(pEsd->GetTimeStamp());         //C6F14 low  temp for this chamber
-       Double_t tHigh = ((TF1*)pNmean->At(6*cham+2*iRad+1))->Eval(pEsd->GetTimeStamp());         //C6F14 high temp for this chamber
-       Double_t tExp  = AliHMPIDParam::FindTemp(tLow,tHigh,yRa);                                 //estimated temp for that chamber at that y
-       nmean = AliHMPIDParam::NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);           //mean ref idx @ a given temp
-       }
-     }
-    Double_t qthre = 0; 
-    if(pQthre->GetEntriesFast()==AliHMPIDParam::kMaxCh+1)                                        // just for backward compatibility
-      qthre=((TF1*)pQthre->At(cham))->Eval(pEsd->GetTimeStamp());                                //
-    else {                                                                                       // in the past just 1 qthre
-      Int_t hvsec = AliHMPIDParam::InHVSector(yPc);                                              //  per chamber
-      if (hvsec>=0)
-       qthre=((TF1*)pQthre->At(6*cham+hvsec))->Eval(pEsd->GetTimeStamp());                      //
-    }                                                                                            //
+*/
+    //evaluate nMean
+    if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
+      nmean=((TF1*)pNmean->At(3*ipCh))->Eval(pEsd->GetTimeStamp());                             //C6F14 Nmean for this chamber
+    } else {
+      Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
+      if(iRad < 0) {
+       nmean = -1;
+      } else {
+      Double_t tLow  = ((TF1*)pNmean->At(6*ipCh+2*iRad  ))->Eval(pEsd->GetTimeStamp());         //C6F14 low  temp for this chamber
+      Double_t tHigh = ((TF1*)pNmean->At(6*ipCh+2*iRad+1))->Eval(pEsd->GetTimeStamp());         //C6F14 high temp for this chamber
+      Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
+      nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
+      }
+      if(nmean < 0){                                                                            //track didn' t pass through the radiator
+         pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
+         pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                          //set index of cluster
+         continue;
+      }
+    }
+    //
     recon.SetImpPC(xPc,yPc);                                                                     //store track impact to PC
-    recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(cham),nmean,qthre);                           //search for Cerenkov angle of this track
-//    Printf("AliHMPIDTracker::Recon: nmean %f, qthre %f",nmean,qthre);
-  }                                                                                              //ESD tracks loop
+    recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(ipCh),index,nmean);                           //search for Cerenkov angle of this track
+    
+    AliHMPIDPid pID;
+    Double_t prob[5];
+    pID.FindPid(pTrk,5,prob);
+    pTrk->SetHMPIDpid(prob);
+//      Printf(" Prob e- %6.2f mu %6.2f pi %6.2f k %6.2f p %6.2f",prob[0]*100,prob[1]*100,prob[2]*100,prob[3]*100,prob[4]*100);
+
+    delete hmpTrk;hmpTrk=0x0;
+  }//iTrk
+
   return 0; // error code: 0=no error;
 }//Recon()
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
-Int_t AliHMPIDTracker::ReconHiddenTrk(Int_t iCh,Int_t iHVsec,AliESDtrack *pTrk,TClonesArray *pCluLst,TObjArray *pNmean,TObjArray *pQthre)
+Int_t AliHMPIDTracker::ReconHiddenTrk(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
 {
 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time), pQthre - pointer to all function Qthre=f(time)
 //   Returns: error code, 0 if no errors
-  AliHMPIDReconHTA reconHTA;                                                                          //instance of reconstruction class, nothing important in ctor
-  Double_t nmean=((TF1*)pNmean->At(3*iCh))->Eval(0);                                            //C6F14 Nmean for this chamber
-  Double_t qthre = 0;
-  if(pQthre->GetEntriesFast()==AliHMPIDParam::kMaxCh+1)                                         //
-    qthre=((TF1*)pQthre->At(iCh))->Eval(0);                                                     //just for backward compatibi
-  else  qthre=((TF1*)pQthre->At(6*iCh+iHVsec))->Eval(0);                                        //
-  if(pCluLst->GetEntriesFast()<4) return 1;                                                     //min 4 clusters (3 + 1 mip) to find a ring! 
-  if(reconHTA.CkovHiddenTrk(pTrk,pCluLst,nmean,qthre)) return 0;                                   //search for track parameters and Cerenkov angle of this track
-  else return 1;                                                                                // error code: 0=no error,1=fit not performed;
+  
+  AliHMPIDReconHTA reconHTA;                                                                     //instance of reconstruction class, nothing important in ctor
+  
+  AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
+  
+  for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
+    
+    AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //here it is simulated or just empty track
+    Int_t ipCh;
+    ipCh = pTrk->GetHMPIDcluIdx();ipCh/=1000000;
+    if(ipCh<0) continue;
+
+    TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
+    Int_t nMipClusTot = pMipCluLst->GetEntries();                                               //total number of clusters in the given chamber
+    
+    Double_t qMip=-1;
+    Int_t chMip=-1;    
+    Double_t xMip = 0;
+    Double_t yMip = 0;
+    Int_t indMip  = 0;
+    Int_t cluMipSiz = 0;
+
+    for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
+      
+      AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
+      Double_t qClus = pClu->Q();
+      if(qClus>qMip) {
+        qMip  = qClus;
+        chMip = pClu->Ch();
+        xMip = pClu->X();
+        yMip = pClu->Y();
+        indMip = iClu;
+        cluMipSiz = pClu->Size();
+      }
+    }//clus loop
+
+    if(chMip<0) return 1;    
+    
+    Int_t hvsec;
+    Double_t qthre=0;
+// evaluate qThre
+    if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {                                              // just for backward compatibility
+      qthre=((TF1*)pQthre->At(chMip))->Eval(pEsd->GetTimeStamp());                                //
+    } else {                                                                                      // in the past just 1 qthre
+      hvsec = pParam->InHVSector(yMip);                                                           //  per chamber
+      if(hvsec>=0) qthre=((TF1*)pQthre->At(6*chMip+hvsec))->Eval(pEsd->GetTimeStamp());           //
+    }
+//
+    if(qMip<qthre) {
+      pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                        //store mip info in any case 
+      pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);                                                          
+      pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
+      return 1;                                                                                   //charge compatible with MIP clusters      
+    }
+      
+    pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                   //store mip info in any case 
+    pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);                                                          
+
+    Double_t yRa = yMip;                                                                        //just an approx...
+    Double_t nmean;
+    //evaluate nMean
+    if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
+      nmean=((TF1*)pNmean->At(3*chMip))->Eval(pEsd->GetTimeStamp());                            //C6F14 Nmean for this chamber
+    } else {
+      Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
+      if(iRad < 0) {
+       nmean = -1;
+      } else {
+      Double_t tLow  = ((TF1*)pNmean->At(6*chMip+2*iRad  ))->Eval(pEsd->GetTimeStamp());        //C6F14 low  temp for this chamber
+      Double_t tHigh = ((TF1*)pNmean->At(6*chMip+2*iRad+1))->Eval(pEsd->GetTimeStamp());        //C6F14 high temp for this chamber
+      Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
+      nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
+      }
+      if(nmean < 0){                                                                            //track didn' t pass through the radiator
+         pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
+         return 1;
+      }
+    }
+    //
+    if(!reconHTA.CkovHiddenTrk(pTrk,(TClonesArray *)pClus->At(ipCh),indMip,nmean)) {                 //search for track parameters and Cerenkov angle of this track
+      AliHMPIDPid pID;
+      Double_t prob[5];
+      pID.FindPid(pTrk,5,prob);
+      pTrk->SetHMPIDpid(prob);
+    }
+//      Printf(" Prob e- %6.2f mu %6.2f pi %6.2f k %6.2f p %6.2f",prob[0]*100,prob[1]*100,prob[2]*100,prob[3]*100,prob[4]*100);
+  }//iTrk
+
+  return 0; // error code: 0=no error;
+
 }//Recon()
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {