HMPID/HESDfromKin.C

   1 AliRunLoader *gAL=0;
   2 Int_t gEvt=0; Int_t gMaxEvt=0;
   3 TObjArray *pNmean,*pQthre;
   4 TTree *gEsdTr;
   5 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   6 void HESDfromKin(const char *name="default")
   7 {//simulate ESD from kinematics
   8
   9   if(gSystem->IsFileInIncludePath("galice.root")){// tries to open session
  10     if(gAlice) delete gAlice;                                               //in case we execute this in aliroot delete default AliRun object
  11     gAL=AliRunLoader::Open();                                                                    //try to open galice.root from current dir
  12     gAL->LoadgAlice();                                                                           //take new AliRun object from galice.root
  13     if(gAL->LoadHeader()) return;
  14     if(gAL->LoadKinematics()) return;
  15
  16     AliLoader *pHL=gAL->GetDetectorLoader("HMPID");
  17     pHL->LoadRecPoints();
  18     AliESDEvent *pEsd = new AliESDEvent();
  19     TFile *pEsdFl=TFile::Open("AliESDs.root","recreate");
  20     gEsdTr=new TTree("esdTree","Sim ESD from kinematics");
  21     pEsd->CreateStdContent();    pEsd->WriteToTree(gEsdTr);  //clm: new ESD write schema: see Task Force meeting 20th June, 2007
  22     gEsdTr->GetUserInfo()->Add(pEsd);                        //clm: TList has to be created for ReadFromTree method -- this was not needed by the old ESD
  23
  24
  25   }  else return;
  26
  27   if(!OpenCalib()) {Printf("Problems in OpenCalib!Bye.");return;}
  28
  29   TString ttl=name;
  30   Bool_t htaCheck=ttl.Contains("HTA");
  31   if(!htaCheck) SimEsd(pHL,pEsd); else SimEsdHidden(pHL,pEsd);
  32
  33   pEsdFl->cd();
  34   pEsdFl->Write();pEsdFl->Close();
  35 }
  36 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  37 void SimEsd(AliLoader *pHL,AliESDEvent *pEsd)
  38 {
  39   Printf("-----------------------------------------------");
  40   Printf("| SimESD: Utility to embed ESD from kinematics|");
  41   Printf("-----------------------------------------------");
  42   AliHMPIDTracker::SetFieldMap(gAL->GetAliRun()->Field(),kTRUE);
  43   AliHMPID *pH=(AliHMPID*)gAL->GetAliRun()->GetDetector("HMPID");
  44   Int_t mtid=-1;
  45   Int_t iNevt=gAL->GetNumberOfEvents();
  46   pEsd->SetMagneticField(AliHMPIDTracker::GetBz());
  47   Printf("Number of events to process: %i",iNevt);
  48   for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
  49     if(!(iEvt%50)) Printf("Events processed %i",iEvt);
  50     gAL->GetEvent(iEvt);
  51     pHL->TreeR()->GetEntry(0);
  52     AliStack *pStack=gAL->Stack();
  53     for(Int_t i=0;i<pStack->GetNtrack();i++){
  54       TParticle *pTrack=pStack->Particle(i);
  55       mtid=pTrack->GetFirstMother();
  56       if(mtid>=0) continue; // only primaries
  57       if(pTrack->GetPDG()->Charge()==0) continue;
  58       AliESDtrack trk(pTrack);
  59       Float_t xPc,yPc,xRa,yRa,thRa,phRa;
  60       Int_t iCh=AliHMPIDTracker::IntTrkCha(&trk,xPc,yPc,xRa,yRa,thRa,phRa);         //get chamber intersected by this track
  61       if(iCh<0) {
  62         trk.SetHMPIDtrk(0,0,0,0);                                                                //no intersection found
  63         trk.SetHMPIDcluIdx   (99,99999);                                                         //chamber not found, mip not yet considered
  64         trk.SetHMPIDsignal(AliHMPIDRecon::kNotPerformed);                                        //ring reconstruction not yet performed
  65         continue;                                                           //no intersection at all, go after next track
  66       }
  67 //      Printf(" particle analyzed %d with mtid %d is %s hitting chamber %d",i,mtid,pTrack->GetName(),iCh);
  68       trk.SetHMPIDcluIdx   (iCh,99999);                                                          //chamber not found, mip not yet considered
  69       trk.SetHMPIDtrk(xRa,yRa,thRa,phRa);                                                        //store initial infos
  70       pEsd->AddTrack(&trk);
  71     }// track loop
  72
  73     AliHMPIDTracker::Recon(pEsd,pH->CluLst(),pNmean,pQthre);
  74 // Perform PID
  75
  76     for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){                                       //ESD tracks loop
  77       AliESDtrack *pTrk = pEsd->GetTrack(iTrk);                                                    //get reconstructed track
  78       AliHMPIDPid pID;
  79       Double_t prob[5];
  80       pID.FindPid(pTrk,5,prob);
  81       pTrk->SetHMPIDpid(prob);
  82 //      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);
  83     }
  84
  85     gEsdTr->Fill();
  86     pEsd->Reset();
  87
  88   }// event loop
  89   Printf("Events processed %i",iEvt);
  90   gAL->UnloadHeader();  gAL->UnloadKinematics();
  91 }//Esd()
  92 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  93 void SimEsdHidden(AliLoader *pHL,AliESDEvent *pEsd)
  94 {
  95   TFile *fout = new TFile("HTA.root","recreate");
  96   TH1F *hdC   = new TH1F("dC"  ,";delta Cerenkov (rad)",100,-0.2,0.2);
  97   TH1F *hCer  = new TH1F("Cer" ,"Theta Cerenkov (rad)",250,0.,0.75);
  98   TH2F *htvsp = new TH2F("tvsp",";momentum (GeV/c);theta Cerenkov (rad)",100,0.,5.,1000,0.,0.75);
  99   TH1F *hdth  = new TH1F("dth" ,";Delta theta Trk (mrad)",100,-250,250);
 100   TH1F *hdph  = new TH1F("dph" ,";Delta phi Trk (mrad)",100,-500,500);
 101   Double_t rd=TMath::RadToDeg();
 102   Printf("----------------------------------------------");
 103   Printf("| SimHTA:Utility to embed ESD from kinematics|");
 104   Printf("|     with  Hidden Track Algorithm (HTA)     |");
 105   Printf("----------------------------------------------");
 106   AliHMPIDTracker::SetFieldMap(gAL->GetAliRun()->Field(),kTRUE);
 107   AliHMPID *pH=(AliHMPID*)gAL->GetAliRun()->GetDetector("HMPID");
 108   Int_t mtid=-1;
 109   Int_t iNevt=gAL->GetNumberOfEvents();
 110
 111   Printf("Number of events to process: %i",iNevt);
 112
 113   for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
 114     if(!(iEvt%50)) Printf("Events processed %i",iEvt);
 115     gAL->GetEvent(iEvt);
 116     pHL->TreeR()->GetEntry(0);
 117     AliStack *pStack=gAL->Stack();
 118
 119     for(Int_t i=0;i<pStack->GetNtrack();i++){
 120
 121       TParticle *pTrack=pStack->Particle(i);
 122       mtid=pTrack->GetFirstMother();
 123
 124       if(mtid>=0) continue; // only primaries
 125
 126       //find the chamber that intersects HMPID
 127       AliESDtrack trk(pTrack);
 128       Float_t xPc,yPc,xRa,yRa,thRa,phRa;
 129       Int_t iCh=AliHMPIDTracker::IntTrkCha(&trk,xPc,yPc,xRa,yRa,thRa,phRa);         //get chamber intersected by this track
 130       if(iCh<0) continue;                                                           //no intersection at all, go after next track
 131       trk.SetHMPIDtrk(xRa,yRa,thRa,phRa);                                                        //store initial infos
 132       Float_t radX,radY,thetaTrk,phiTrk;
 133       trk.GetHMPIDtrk(radX,radY,thetaTrk,phiTrk);
 134 //      Printf("simulated track theta %f phi %f",thetaTrk*rd,phiTrk*rd);
 135       TObjArray *pClus = pH->CluLst();
 136
 137       if(AliHMPIDTracker::ReconHiddenTrk(iCh,0,&trk,(TClonesArray *)pClus->At(iCh),pNmean,pQthre)!=0) continue;
 138
 139       pEsd->AddTrack(&trk);
 140       Double_t thetaCerSim = TMath::ACos(pTrack->Energy()/(1.292*pTrack->P()));
 141 //      Printf(" theta Cerenkov simulated     %f",thetaCerSim);
 142 //      Printf(" theta Cerenkov reconstructed %f",trk.GetHMPIDsignal());
 143       Float_t thetaFit,phiFit;
 144       trk.GetHMPIDtrk(radX,radY,thetaFit,phiFit);
 145 //      Printf("reconstr. track theta %f phi %f",thetaFit*rd,phiFit*rd);
 146
 147       // fill useful histos
 148       hdC->Fill(trk.GetHMPIDsignal()-thetaCerSim);
 149       hCer->Fill(trk.GetHMPIDsignal());
 150       htvsp->Fill(pTrack->P(),trk.GetHMPIDsignal());
 151       hdth->Fill((thetaFit-thetaTrk)*1000);
 152       hdph->Fill((phiFit-phiTrk)*1000);
 153     }// track loop
 154     pEsd->SetMagneticField(AliHMPIDTracker::GetBz());
 155     gEsdTr->Fill();
 156     pEsd->Reset();
 157   }// event loop
 158   Printf("Events processed %i",iEvt);
 159   fout->Write();
 160   fout->Close();
 161   delete fout;
 162   gAL->UnloadHeader();  gAL->UnloadKinematics();
 163 }//EsdHidden()
 164 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 165 Bool_t OpenCalib()
 166 {
 167   AliCDBManager* pCDB = AliCDBManager::Instance();
 168   pCDB->SetDefaultStorage("local://$HOME");
 169   AliCDBEntry *pQthreEnt=pCDB->Get("HMPID/Calib/Qthre",0);
 170   AliCDBEntry *pNmeanEnt=pCDB->Get("HMPID/Calib/Nmean",0);
 171
 172   if(!pQthreEnt || !pNmeanEnt) return kFALSE;
 173
 174   pNmean=(TObjArray*)pNmeanEnt->GetObject();
 175   pQthre=(TObjArray*)pQthreEnt->GetObject();
 176
 177   if(!pQthre || !pNmean) return kFALSE;
 178   return kTRUE;
 179 }
 180 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++