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 "AliHMPIDRecoParamV1.h"   //Recon()
   8 #include "AliHMPIDReconstructor.h"//Recon()
   9 #include "AliHMPIDReconHTA.h"    //ReconHTA()
  10 #include <AliESDEvent.h>         //PropagateBack(),Recon()
  11 #include <AliESDtrack.h>         //Intersect()
  12 #include <AliTracker.h>
  13 #include <AliRun.h>              //GetTrackPoint(),PropagateBack()
  14 #include <AliTrackPointArray.h>  //GetTrackPoint()
  15 #include <AliAlignObj.h>         //GetTrackPoint()
  16 #include <AliCDBManager.h>       //PropageteBack()
  17 #include <AliCDBEntry.h>         //PropageteBack()
  18 //.
  19 // HMPID base class fo tracking
  20 //.
  21 //.
  22 //.
  23 ClassImp(AliHMPIDTracker)
  24 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  25 AliHMPIDTracker::AliHMPIDTracker():
  26   AliTracker(),
  27   fClu(new TObjArray(AliHMPIDParam::kMaxCh+1))
  28 {
  29 // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster
  30 //
  31 //
  32   fClu->SetOwner(kTRUE);
  33   for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
  34 }//ctor
  35 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  36 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
  37 {
  38 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
  39 // MIP cluster is reffered by index which is stored in AliESDtrack  ???????
  40 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
  41 //            point- reference to the object where to store the point
  42 //   Returns: status of operation  if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
  43   if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
  44   Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
  45   iClu = iClu%1000; //GetHMPIDcluIdx -> 1e+6*ch + 1e+3*clusize + cluIdx;
  46   point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham));//layer and chamber number
  47   TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
  48   AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
  49   Float_t xyz[3];
  50   pClu->GetGlobalXYZ(xyz);
  51   Float_t cov[6];
  52   pClu->GetGlobalCov(cov);
  53   point.SetXYZ(xyz,cov);
  54   return kTRUE;
  55 }//GetTrackPoint()
  56 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  57 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
  58 {
  59 // Static method to find intersection in between given track and HMPID chambers
  60 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
  61 //   Returns: intersected chamber ID or -1
  62   AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching
  63   for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){                              //chambers loop
  64     Int_t chInt = IntTrkCha(i,hmpTrk,xPc,yPc,xRa,yRa,theta,phi);
  65     if(chInt>=0) {delete hmpTrk;hmpTrk=0x0;return chInt;}
  66   }                                                                                             //chambers loop
  67   delete hmpTrk; hmpTrk=0x0;
  68   return -1;                                                                                    //no intersection with HMPID chambers
  69 }//IntTrkCha()
  70 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  71 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)
  72 {
  73 // Static method to find intersection in between given track and HMPID chambers
  74 // Arguments: pTrk- HMPID track; xPc,yPc- track intersection with PC in LORS [cm]
  75 //   Returns: intersected chamber ID or -1
  76     AliHMPIDParam *pParam=AliHMPIDParam::Instance();
  77     Double_t p1[3],n1[3];
  78     pParam->Norm(ch,n1);
  79     pParam->Point(ch,p1,AliHMPIDParam::kRad);                                                    //point & norm  for middle of radiator plane
  80     Double_t p2[3],n2[3];
  81     pParam->Norm(ch,n2);
  82     pParam->Point(ch,p2,AliHMPIDParam::kPc);                                                     //point & norm  for entrance to PC plane
  83     if(pTrk->Intersect(p1,n1)==kFALSE) return -1;                                                //try to intersect track with the middle of radiator
  84     if(pTrk->Intersect(p2,n2)==kFALSE) return -1;
  85     pParam->Mars2LorsVec(ch,n1,theta,phi);                                                       //track angles at RAD
  86     pParam->Mars2Lors   (ch,p1,xRa,yRa);                                                         //TRKxRAD position
  87     pParam->Mars2Lors   (ch,p2,xPc,yPc);                                                         //TRKxPC position
  88     if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return ch;                     //return intersected chamber
  89   return -1;                                                                                     //no intersection with HMPID chambers
  90 }//IntTrkCha()
  91 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  92 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
  93 {
  94 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
  95 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
  96 //   Returns: error code (currently ignored in AliReconstruction::RunTraking())
  97   for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
  98   pCluTree->GetEntry(0);
  99   return 0;
 100 }//LoadClusters()
 101 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 102 Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd)
 103 {
 104 // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event
 105 // Agruments: pEsd - pointer to ESD
 106 //   Returns: error code
 107   AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 42 TF1 + 1 EPhotMean
 108   AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 42 (7ch * 6sec) TF1
 109   if(!pNmeanEnt) AliError("No Nmean C6F14 ");
 110   if(!pQthreEnt) AliError("No Qthre");
 111
 112   return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject());
 113 }//PropagateBack()
 114 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 115 Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
 116 {
 117 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
 118 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
 119 //   Returns: error code, 0 if no errors
 120
 121   AliHMPIDRecon recon;                                                                           //instance of reconstruction class, nothing important in ctor
 122   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
 123   Float_t xPc,yPc,xRa,yRa,theta,phi;
 124   Double_t cluLORS[2]={0};
 125 //  Double_t cluMARS[3]={0},trkMARS[3]={0};
 126 //  Double_t bestcluMARS[3]={0,0,0};
 127 //  Double_t radClu,radInitTrk;
 128   Int_t nMipClusTot=0;
 129 //  Double_t d3d=0;
 130   Double_t qthre = 0;   Double_t nmean=0; Int_t hvsec=0;
 131   Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
 132
 133
 134   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
 135
 136 //    Double_t bestChi2=99999;chi2=99999;                                                          //init. track matching params
 137     Double_t dmin=999999,bz=0,distCut=1,distParams[5]={1};
 138
 139     Bool_t isOkDcut=kFALSE;
 140     Bool_t isOkQcut=kFALSE;
 141     Bool_t isMatched=kFALSE;
 142
 143     AliHMPIDCluster *bestHmpCluster=0x0;                                                          //the best matching cluster
 144     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //get reconstructed track
 145
 146     if(!pTrk->IsOn(AliESDtrack::kTPCout)) continue;
 147
 148     if(pTrk->IsOn(AliESDtrack::kTPCrefit)) continue;
 149
 150     AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk);                                             //create a hmpid track to be used for propagation and matching
 151     bz=AliTracker::GetBz();
 152 //initial flags for HMPID ESD infos
 153     pTrk->SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
 154     pTrk->SetHMPIDmip(0,0,0,0);                                                                //store mip info in any case
 155     pTrk->SetHMPIDcluIdx(99,99999);                                                            //chamber not found, mip not yet considered
 156     pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
 157
 158     Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);                                        //find the intersected chamber for this track
 159     if(ipCh<0) continue;                                                                         //no intersection at all, go after next track
 160
 161     pTrk->SetHMPIDtrk(xPc,yPc,theta,phi);                                                        //store initial infos
 162     pTrk->SetHMPIDcluIdx(ipCh,9999);                                                             //set chamber, index of cluster + cluster size
 163
 164 // track intersects the chamber ipCh: find the MIP
 165
 166     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
 167     nMipClusTot = pMipCluLst->GetEntries();                                                     //total number of clusters in the given chamber
 168     nClusCh[ipCh] = nMipClusTot;
 169
 170     if(nMipClusTot==0) continue;
 171
 172     Int_t index=-1;                                                                             //index of the "best" matching cluster
 173
 174     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
 175
 176       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
 177 // evaluate qThre
 178       if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {
 179         if(pEsd->GetTimeStamp()==0)   qthre=pParam->QCut();                                     // just for backward compatibility
 180         else qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(pEsd->GetTimeStamp());                  //
 181       } else {                                                                                  // in the past just 1 qthre
 182         hvsec = pParam->InHVSector(pClu->Y());                                                  //  per chamber
 183         if(hvsec>=0){
 184           if(pEsd->GetTimeStamp()==0)   qthre=pParam->QCut();                                   // just for backward compatibility
 185           else  qthre=((TF1*)pQthre->At(6*ipCh+hvsec))->Eval(pEsd->GetTimeStamp());             //
 186         }
 187
 188        }                                                                                            //
 189 //
 190       if(pClu->Q()<qthre) continue;                                                                      //charge compartible with MIP clusters
 191       isOkQcut = kTRUE;
 192 //
 193       cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();                                            //get the LORS coordinates of the cluster
 194       Double_t dist = TMath::Sqrt((xPc-cluLORS[0])*(xPc-cluLORS[0])+(yPc-cluLORS[1])*(yPc-cluLORS[1]));
 195
 196       if(dist<dmin) {
 197         dmin = dist;
 198         index=iClu;
 199         bestHmpCluster=pClu;
 200       }
 201     }
 202
 203     if(!isOkQcut) {
 204       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
 205       continue;
 206     }
 207
 208     Double_t radius = (pParam->Lors2Mars(ipCh,pParam->SizeAllX()/2,pParam->SizeAllY()/2)).Mag();
 209
 210     if(!AliTracker::PropagateTrackToBxByBz(hmpTrk,radius,pTrk->GetMass(),1,kFALSE)) continue;
 211
 212     if(!hmpTrk->PropagateTo(bestHmpCluster)) continue;
 213
 214     Int_t cluSiz = bestHmpCluster->Size();
 215     pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0);  //store mip info in any case
 216     pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                             //set chamber, index of cluster + cluster size
 217
 218     if(AliHMPIDReconstructor::GetRecoParam())                                                 //retrieve distance cut
 219     {
 220       if(AliHMPIDReconstructor::GetRecoParam()->IsFixedDistCut()==kTRUE)                      //distance cut is fixed number
 221       {
 222         distCut=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDist();
 223       }
 224       else
 225       {
 226         for(Int_t ipar=0;ipar<5;ipar++) distParams[ipar]=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDistParam(ipar);      //prevision: distance cut is function of momentum
 227         distCut=distParams[0]+distParams[1]*TMath::Power(distParams[2]*pTrk->GetP(),distParams[3]); //prevision: change functional form to be more precise
 228       }
 229     }
 230     else {distCut=pParam->DistCut();}
 231
 232     if(dmin < distCut) {
 233       isOkDcut = kTRUE;
 234     }
 235
 236
 237
 238     if(!isOkDcut) {
 239       pTrk->SetHMPIDsignal(pParam->kMipDistCut);                                                //closest cluster with enough charge is still too far from intersection
 240     }
 241
 242     if(isOkQcut*isOkDcut) isMatched = kTRUE;                                                    // MIP-Track matched !!
 243
 244     if(!isMatched) continue;                                                                    // If matched continue...
 245
 246     Bool_t isOk = hmpTrk->Update(bestHmpCluster,0.1,0);
 247     if(!isOk) continue;
 248     pTrk->SetOuterHmpParam(hmpTrk,AliESDtrack::kHMPIDout);
 249
 250     FillResiduals(hmpTrk,bestHmpCluster,kFALSE);
 251
 252
 253     //evaluate nMean
 254     if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
 255       nmean=((TF1*)pNmean->At(3*ipCh))->Eval(pEsd->GetTimeStamp());                             //C6F14 Nmean for this chamber
 256     } else {
 257       Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
 258       if(iRad < 0) {
 259         nmean = -1;
 260       } else {
 261       Double_t tLow  = ((TF1*)pNmean->At(6*ipCh+2*iRad  ))->Eval(pEsd->GetTimeStamp());         //C6F14 low  temp for this chamber
 262       Double_t tHigh = ((TF1*)pNmean->At(6*ipCh+2*iRad+1))->Eval(pEsd->GetTimeStamp());         //C6F14 high temp for this chamber
 263       Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
 264       nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
 265       }
 266       if(nmean < 0){                                                                            //track didn' t pass through the radiator
 267          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
 268          pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz);                                          //set index of cluster
 269          continue;
 270       }
 271     }
 272     //
 273     recon.SetImpPC(xPc,yPc);                                                                     //store track impact to PC
 274     recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(ipCh),index,nmean,xRa,yRa);                   //search for Cerenkov angle of this track
 275
 276     if(pTrk->GetHMPIDsignal()<0) continue;
 277
 278     AliHMPIDPid pID;
 279     Double_t prob[5];
 280     pID.FindPid(pTrk,5,prob);
 281     pTrk->SetHMPIDpid(prob);
 282 //      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);
 283
 284     delete hmpTrk;hmpTrk=0x0;
 285   }//iTrk
 286
 287   return 0; // error code: 0=no error;
 288 }//Recon()
 289 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 290 Int_t AliHMPIDTracker::ReconHiddenTrk(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
 291 {
 292 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
 293 // 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)
 294 //   Returns: error code, 0 if no errors
 295
 296   AliHMPIDReconHTA reconHTA;                                                                     //instance of reconstruction class, nothing important in ctor
 297
 298   AliHMPIDParam *pParam = AliHMPIDParam::Instance();                                             //Instance of AliHMPIDParam
 299
 300   for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                        //loop on the ESD tracks in the event
 301
 302     AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                     //here it is simulated or just empty track
 303     Int_t ipCh;
 304     ipCh = pTrk->GetHMPIDcluIdx();ipCh/=1000000;
 305     if(ipCh<0) continue;
 306
 307     TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh);                                   //get the list of clusters
 308     Int_t nMipClusTot = pMipCluLst->GetEntries();                                               //total number of clusters in the given chamber
 309
 310     Double_t qMip=-1;
 311     Int_t chMip=-1;
 312     Double_t xMip = 0;
 313     Double_t yMip = 0;
 314     Int_t indMip  = 0;
 315     Int_t cluMipSiz = 0;
 316
 317     for (Int_t iClu=0; iClu<nMipClusTot;iClu++) {                                               //clusters loop
 318
 319       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu);                    //get the cluster
 320       Double_t qClus = pClu->Q();
 321       if(qClus>qMip) {
 322         qMip  = qClus;
 323         chMip = pClu->Ch();
 324         xMip = pClu->X();
 325         yMip = pClu->Y();
 326         indMip = iClu;
 327         cluMipSiz = pClu->Size();
 328       }
 329     }//clus loop
 330
 331     if(chMip<0) return 1;
 332
 333     Int_t hvsec;
 334     Double_t qthre=0;
 335 // evaluate qThre
 336     if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) {                                              // just for backward compatibility
 337       qthre=((TF1*)pQthre->At(chMip))->Eval(pEsd->GetTimeStamp());                                //
 338     } else {                                                                                      // in the past just 1 qthre
 339       hvsec = pParam->InHVSector(yMip);                                                           //  per chamber
 340       if(hvsec>=0) qthre=((TF1*)pQthre->At(6*chMip+hvsec))->Eval(pEsd->GetTimeStamp());           //
 341     }
 342 //
 343     if(qMip<qthre) {
 344       pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                        //store mip info in any case
 345       pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
 346       pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
 347       return 1;                                                                                   //charge compatible with MIP clusters
 348     }
 349
 350     pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0);                                                   //store mip info in any case
 351     pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
 352
 353     Double_t yRa = yMip;                                                                        //just an approx...
 354     Double_t nmean;
 355     //evaluate nMean
 356     if(pNmean->GetEntries()==21) {                                                              //for backward compatibility
 357       nmean=((TF1*)pNmean->At(3*chMip))->Eval(pEsd->GetTimeStamp());                            //C6F14 Nmean for this chamber
 358     } else {
 359       Int_t iRad     = pParam->Radiator(yRa);                                                   //evaluate the radiator involved
 360       if(iRad < 0) {
 361         nmean = -1;
 362       } else {
 363       Double_t tLow  = ((TF1*)pNmean->At(6*chMip+2*iRad  ))->Eval(pEsd->GetTimeStamp());        //C6F14 low  temp for this chamber
 364       Double_t tHigh = ((TF1*)pNmean->At(6*chMip+2*iRad+1))->Eval(pEsd->GetTimeStamp());        //C6F14 high temp for this chamber
 365       Double_t tExp  = pParam->FindTemp(tLow,tHigh,yRa);                                        //estimated temp for that chamber at that y
 366       nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp);                  //mean ref idx @ a given temp
 367       }
 368       if(nmean < 0){                                                                            //track didn' t pass through the radiator
 369          pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad);                                           //set the appropriate flag
 370          return 1;
 371       }
 372     }
 373     //
 374     if(!reconHTA.CkovHiddenTrk(pTrk,(TClonesArray *)pClus->At(ipCh),indMip,nmean)) {                 //search for track parameters and Cerenkov angle of this track
 375       AliHMPIDPid pID;
 376       Double_t prob[5];
 377       pID.FindPid(pTrk,5,prob);
 378       pTrk->SetHMPIDpid(prob);
 379     }
 380 //      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);
 381   }//iTrk
 382
 383   return 0; // error code: 0=no error;
 384
 385 }//Recon()
 386 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 387 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {
 388
 389  // Publishes all pointers to clusters known to the tracker into the
 390   // passed object array.
 391   // The ownership is not transfered - the caller is not expected to delete
 392   // the clusters
 393
 394   for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){
 395     TClonesArray *pCluArr=(TClonesArray*)(*fClu)[iCh];
 396     for (Int_t iClu=0; iClu<pCluArr->GetEntriesFast();iClu++){
 397       AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluArr->UncheckedAt(iClu);
 398       array->AddLast(pClu);
 399     }//cluster loop in iCh
 400     pCluArr->Delete();
 401   }//Ch loop
 402
 403   return;
 404 }
 405 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++