HMPID/AliHMPIDTracker.cxx

   1 #include "AliHMPIDTracker.h"     //class header
   2 #include "AliHMPIDtrack.h"       //class header
   3 #include "AliHMPIDCluster.h"     //GetTrackPoint(),PropagateBack()
   4 #include "AliHMPIDParam.h"       //GetTrackPoint(),PropagateBack()
   5 #include "AliHMPIDPid.h"         //Recon(),reconHTA()
   6 #include "AliHMPIDRecon.h"       //Recon()
   7 #include "AliHMPIDReconHTA.h"    //ReconHTA()
   8 #include <AliESDEvent.h>         //PropagateBack(),Recon()
   9 #include <AliESDtrack.h>         //Intersect()
  10 #include <AliRun.h>              //GetTrackPoint(),PropagateBack()
  11 #include <AliTrackPointArray.h>  //GetTrackPoint()
  12 #include <AliAlignObj.h>         //GetTrackPoint()
  13 #include <AliCDBManager.h>       //PropageteBack()
  14 #include <AliCDBEntry.h>         //PropageteBack()
  15 //.
  16 // HMPID base class fo tracking
  17 //.
  18 //.
  19 //.
  20 ClassImp(AliHMPIDTracker)
  21 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  22 AliHMPIDTracker::AliHMPIDTracker():
  23   AliTracker(),
  24   fClu(new TObjArray(AliHMPIDParam::kMaxCh+1))
  25 {
  26 // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster
  27 //
  28 //
  29   fClu->SetOwner(kTRUE);
  30   for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
  31 }//ctor
  32 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  33 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
  34 {
  35 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
  36 // MIP cluster is reffered by index which is stored in AliESDtrack  ???????
  37 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
  38 //            point- reference to the object where to store the point
  39 //   Returns: status of operation  if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
  40   if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
  41   Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
  42   iClu = iClu%1000; //GetHMPIDcluIdx -> 1e+6*ch + 1e+3*clusize + cluIdx;
  43   point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham));//layer and chamber number
  44   TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
  45   AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
  46   Float_t xyz[3];
  47   pClu->GetGlobalXYZ(xyz);
  48   Float_t cov[6];
  49   pClu->GetGlobalCov(cov);
  50   point.SetXYZ(xyz,cov);
  51   return kTRUE;
  52 }//GetTrackPoint()
  53 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  54 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
  55 {
  56 // Static method to find intersection in between given track and HMPID chambers
  57 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
  58 //   Returns: intersected chamber ID or -1
  59   AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching
  60   for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){                              //chambers loop
  61     Int_t chInt = IntTrkCha(i,hmpTrk,xPc,yPc,xRa,yRa,theta,phi);
  62     if(chInt>=0) {delete hmpTrk;hmpTrk=0x0;return chInt;}
  63   }                                                                                             //chambers loop
  64   delete hmpTrk; hmpTrk=0x0;
  65   return -1;                                                                                    //no intersection with HMPID chambers
  66 }//IntTrkCha()
  67 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  68 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)
  69 {
  70 // Static method to find intersection in between given track and HMPID chambers
  71 // Arguments: pTrk- HMPID track; xPc,yPc- track intersection with PC in LORS [cm]
  72 //   Returns: intersected chamber ID or -1
  73     AliHMPIDParam *pParam=AliHMPIDParam::Instance();
  74     Double_t p1[3],n1[3];
  75     pParam->Norm(ch,n1);
  76     pParam->Point(ch,p1,AliHMPIDParam::kRad);                                                    //point & norm  for middle of radiator plane
  77     Double_t p2[3],n2[3];
  78     pParam->Norm(ch,n2);
  79     pParam->Point(ch,p2,AliHMPIDParam::kPc);                                                     //point & norm  for entrance to PC plane
  80     if(pTrk->Intersect(pTrk,p1,n1)==kFALSE) return -1;                                           //try to intersect track with the middle of radiator
  81     if(pTrk->Intersect(pTrk,p2,n2)==kFALSE) return -1;
  82     pParam->Mars2LorsVec(ch,n1,theta,phi);                                                       //track angles at RAD
  83     pParam->Mars2Lors   (ch,p1,xRa,yRa);                                                         //TRKxRAD position
  84     pParam->Mars2Lors   (ch,p2,xPc,yPc);                                                         //TRKxPC position
  85     if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return ch;                     //return intersected chamber
  86   return -1;                                                                                     //no intersection with HMPID chambers
  87 }//IntTrkCha()
  88 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  89 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
  90 {
  91 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
  92 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
  93 //   Returns: error code (currently ignored in AliReconstruction::RunTraking())
  94   for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
  95   pCluTree->GetEntry(0);
  96   return 0;
  97 }//LoadClusters()
  98 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  99 Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd)
 100 {
 101 // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event
 102 // Agruments: pEsd - pointer to ESD
 103 //   Returns: error code
 104   AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 42 TF1 + 1 EPhotMean
 105   AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 42 (7ch * 6sec) TF1
 106   if(!pNmeanEnt) AliError("No Nmean C6F14 ");
 107   if(!pQthreEnt) AliError("No Qthre");
 108
 109   return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject());
 110 }//PropagateBack()
 111 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 112 Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
 113 {
 114 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
 115 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
 116 //   Returns: error code, 0 if no errors
 117
 118   AliHMPIDRecon recon;                                                                           //instance of reconstruction class, nothing important in ctor
 119   Float_t xPc,yPc,xRa,yRa,theta,phi;
 120   Double_t cluLORS[2]={0},cluMARS[3]={0},trkMARS[3]={0};
 121 //  Double_t bestcluMARS[3]={0,0,0};
 122   Double_t radClu,radInitTrk;
 123   Int_t nMipClusTot=0;
 124   Double_t d3d=0,dmin=999999,bz=0;
 125   Bool_t isMatched=kFALSE;
 126   Int_t cluSiz=0;
 127   Double_t qthre = 0;   Double_t nmean=0; Int_t cham=0; Int_t hvsec=0;
 128   Int_t index=0;                                                                                //index of the "best" matching cluster
 129   Double_t bestChi2=-1;                                                                         //Chi2 of the "best" matching cluster
 130   Double_t chi2=0;
 131   Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
 132   Bool_t isOkQcut=kFALSE;
 133   Bool_t isOkDcut=kFALSE;
 134
 135   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
 136
 137   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
 138     isMatched=kFALSE;dmin=999999;bestChi2=99999;chi2=99999;cluSiz=0;                              //init. track matching params
 139     isOkQcut = kFALSE;
 140     AliHMPIDCluster *bestHmpCluster=0x0;                                                          //the best matching cluster
 141     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //get reconstructed track
 142     AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching
 143     bz=AliTracker::GetBz();
 144
 145     Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);                                        //find the intersected chamber for this track
 146
 147     if(ipCh<0) {                                                                                 //no intersection at all, go after next track
 148       pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
 149       pTrk->SetHMPIDcluIdx   (99,99999);                                                         //chamber not found, mip not yet considered
 150       pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
 151       continue;
 152     }
 153
 154 // track intersects the chamber ipCh: find the MIP
 155
 156     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
 157     nMipClusTot = pMipCluLst->GetEntries();                                                     //total number of clusters in the given chamber
 158     nClusCh[ipCh] = nMipClusTot;
 159
 160     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
 161
 162       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
 163 // evaluate qThre
 164       if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {                                             // just for backward compatibility
 165         qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(pEsd->GetTimeStamp());                          //
 166       } else {                                                                                     // in the past just 1 qthre
 167         hvsec = pParam->InHVSector(pClu->Y());                                              //  per chamber
 168         if(hvsec>=0)
 169           qthre=((TF1*)pQthre->At(6*cham+hvsec))->Eval(pEsd->GetTimeStamp());                      //
 170       }                                                                                            //
 171 //
 172       if(pClu->Q()<qthre) continue;                                                                      //charge compartible with MIP clusters
 173       isOkQcut = kTRUE;
 174
 175       cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();                                            //get the LORS coordinates of the cluster
 176       pParam->Lors2Mars(ipCh,cluLORS[0],cluLORS[1],cluMARS);              //convert cluster coors. from LORS to MARS
 177       radClu=TMath::Sqrt(cluMARS[0]*cluMARS[0]+cluMARS[1]*cluMARS[1]);                       //radial distance of candidate cluster in MARS
 178       Double_t trkx0[3];
 179       hmpTrk->GetXYZ(trkx0);                                                                 //get track position in MARS
 180       radInitTrk=TMath::Sqrt(trkx0[0]*trkx0[0]+trkx0[1]*trkx0[1]);
 181       hmpTrk->PropagateToR(radClu,10);
 182       hmpTrk->GetXYZ(trkx0);                                                                   //get track position in MARS
 183       hmpTrk->GetXYZAt(radClu,bz,trkMARS);                                                     //get the track coordinates at the rad distance after prop.
 184       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]));
 185       chi2=hmpTrk->GetPredictedChi2(pClu);
 186       if(dmin > d3d ) {                                                                         //to be saved for the moment...
 187         cluSiz = pClu->Size();
 188         dmin=d3d;
 189         bestHmpCluster=pClu;
 190         index=iClu;
 191         bestChi2=chi2;
 192         cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();
 193 //        pParam->Lors2Mars(ipCh,cluLORS[0],cluLORS[1],bestcluMARS);
 194       }//global dmin cut
 195     }//clus loop
 196
 197     pTrk->SetHMPIDmip(0,0,0,0);                                                                //store mip info in any case
 198
 199     if(!isOkQcut) {
 200       pTrk->SetHMPIDcluIdx(ipCh,9999);
 201       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
 202       continue;
 203     }
 204
 205     if(dmin < pParam->DistCut()) {
 206       isOkDcut = kTRUE;
 207     }
 208
 209     if(!isOkDcut) {
 210       pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0);  //store mip info in any case
 211       pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                             //set chamber, index of cluster + cluster size
 212       pTrk->SetHMPIDsignal(pParam->kMipDistCut);                                                //closest cluster with enough charge is still too far from intersection
 213     }
 214
 215     if(isOkQcut*isOkDcut) isMatched = kTRUE;                                                    // MIP-Track matched !!
 216
 217     if(!isMatched) continue;                                                                    // If matched continue...
 218
 219     Int_t indexAll = 0;
 220     for(Int_t iC=0;iC<ipCh;iC++) indexAll+=nClusCh[iC]; indexAll+=index;                        //to be verified...
 221
 222     Bool_t isOk = hmpTrk->Update(bestHmpCluster,bestChi2,indexAll);
 223     if(!isOk) continue;
 224     pTrk->SetOuterParam(hmpTrk,AliESDtrack::kHMPIDout);
 225
 226     cham=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);
 227
 228     if(cham<0) {                                                                                  //no intersection at all, go after next track
 229       pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
 230       pTrk->SetHMPIDcluIdx   (99,99999);                                                         //chamber not found, mip not yet considered
 231       pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
 232       continue;
 233     }
 234
 235     pTrk->SetHMPIDtrk(xRa,yRa,theta,phi);                                                        //store initial infos
 236     //evaluate nMean
 237     if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
 238       nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp());                             //C6F14 Nmean for this chamber
 239     } else {
 240       Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
 241       if(iRad < 0) {
 242         nmean = -1;
 243       } else {
 244       Double_t tLow  = ((TF1*)pNmean->At(6*cham+2*iRad  ))->Eval(pEsd->GetTimeStamp());         //C6F14 low  temp for this chamber
 245       Double_t tHigh = ((TF1*)pNmean->At(6*cham+2*iRad+1))->Eval(pEsd->GetTimeStamp());         //C6F14 high temp for this chamber
 246       Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
 247       nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
 248       }
 249       if(nmean < 0){                                                                            //track didn' t pass through the radiator
 250          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
 251          pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                          //set index of cluster
 252          continue;
 253       }
 254     }
 255     //
 256     recon.SetImpPC(xPc,yPc);                                                                     //store track impact to PC
 257     recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(cham),index,nmean);                           //search for Cerenkov angle of this track
 258
 259     AliHMPIDPid pID;
 260     Double_t prob[5];
 261     pID.FindPid(pTrk,5,prob);
 262     pTrk->SetHMPIDpid(prob);
 263 //      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);
 264
 265     delete hmpTrk;hmpTrk=0x0;
 266   }//iTrk
 267
 268   return 0; // error code: 0=no error;
 269 }//Recon()
 270 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 271 Int_t AliHMPIDTracker::ReconHiddenTrk(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
 272 {
 273 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
 274 // 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)
 275 //   Returns: error code, 0 if no errors
 276
 277   AliHMPIDReconHTA reconHTA;                                                                     //instance of reconstruction class, nothing important in ctor
 278
 279   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
 280
 281   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
 282
 283     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //here it is simulated or just empty track
 284     Int_t ipCh;
 285     ipCh = pTrk->GetHMPIDcluIdx();ipCh/=1000000;
 286     if(ipCh<0) continue;
 287
 288     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
 289     Int_t nMipClusTot = pMipCluLst->GetEntries();                                               //total number of clusters in the given chamber
 290
 291     Double_t qMip=-1;
 292     Int_t chMip=-1;
 293     Double_t xMip = 0;
 294     Double_t yMip = 0;
 295     Int_t indMip  = 0;
 296     Int_t cluMipSiz = 0;
 297
 298     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
 299
 300       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
 301       Double_t qClus = pClu->Q();
 302       if(qClus>qMip) {
 303         qMip  = qClus;
 304         chMip = pClu->Ch();
 305         xMip = pClu->X();
 306         yMip = pClu->Y();
 307         indMip = iClu;
 308         cluMipSiz = pClu->Size();
 309       }
 310     }//clus loop
 311
 312     if(chMip<0) return 1;
 313
 314     Int_t hvsec;
 315     Double_t qthre=0;
 316 // evaluate qThre
 317     if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {                                              // just for backward compatibility
 318       qthre=((TF1*)pQthre->At(chMip))->Eval(pEsd->GetTimeStamp());                                //
 319     } else {                                                                                      // in the past just 1 qthre
 320       hvsec = pParam->InHVSector(yMip);                                                           //  per chamber
 321       if(hvsec>=0) qthre=((TF1*)pQthre->At(6*chMip+hvsec))->Eval(pEsd->GetTimeStamp());           //
 322     }
 323 //
 324     if(qMip<qthre) {
 325       pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                        //store mip info in any case
 326       pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
 327       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
 328       return 1;                                                                                   //charge compatible with MIP clusters
 329     }
 330
 331     pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                   //store mip info in any case
 332     pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
 333
 334     Double_t yRa = yMip;                                                                        //just an approx...
 335     Double_t nmean;
 336     //evaluate nMean
 337     if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
 338       nmean=((TF1*)pNmean->At(3*chMip))->Eval(pEsd->GetTimeStamp());                            //C6F14 Nmean for this chamber
 339     } else {
 340       Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
 341       if(iRad < 0) {
 342         nmean = -1;
 343       } else {
 344       Double_t tLow  = ((TF1*)pNmean->At(6*chMip+2*iRad  ))->Eval(pEsd->GetTimeStamp());        //C6F14 low  temp for this chamber
 345       Double_t tHigh = ((TF1*)pNmean->At(6*chMip+2*iRad+1))->Eval(pEsd->GetTimeStamp());        //C6F14 high temp for this chamber
 346       Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
 347       nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
 348       }
 349       if(nmean < 0){                                                                            //track didn' t pass through the radiator
 350          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
 351          return 1;
 352       }
 353     }
 354     //
 355     if(!reconHTA.CkovHiddenTrk(pTrk,(TClonesArray *)pClus->At(ipCh),indMip,nmean)) {                 //search for track parameters and Cerenkov angle of this track
 356       AliHMPIDPid pID;
 357       Double_t prob[5];
 358       pID.FindPid(pTrk,5,prob);
 359       pTrk->SetHMPIDpid(prob);
 360     }
 361 //      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);
 362   }//iTrk
 363
 364   return 0; // error code: 0=no error;
 365
 366 }//Recon()
 367 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 368 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {
 369
 370  // Publishes all pointers to clusters known to the tracker into the
 371   // passed object array.
 372   // The ownership is not transfered - the caller is not expected to delete
 373   // the clusters
 374
 375   for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){
 376     TClonesArray *pCluArr=(TClonesArray*)(*fClu)[iCh];
 377     for (Int_t iClu=0; iClu<pCluArr->GetEntriesFast();iClu++){
 378       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluArr->UncheckedAt(iClu);
 379       array->AddLast(pClu);
 380     }//cluster loop in iCh
 381     pCluArr->Delete();
 382   }//Ch loop
 383
 384   return;
 385 }
 386 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++