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;
  60       Int_t iCh=AliHMPIDTracker::IntTrkCha(&trk,xPc,yPc);                           //get chamber intersected by this track
  61       if(iCh<0) continue;                                                           //no intersection at all, go after next track
  62 //      Printf(" particle analyzed %d with mtid %d is %s hitting chamber %d",i,mtid,pTrack->GetName(),iCh);
  63       pEsd->AddTrack(&trk);
  64       AliHMPIDTracker::Recon(pEsd,pH->CluLst(),pNmean,pQthre);
  65     }// track loop
  66     gEsdTr->Fill();
  67     pEsd->Reset();
  68   }// event loop
  69   Printf("Events processed %i",iEvt);
  70   gAL->UnloadHeader();  gAL->UnloadKinematics();
  71 }//Esd()
  72 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  73 void SimEsdHidden(AliLoader *pHL,AliESDEvent *pEsd)
  74 {
  75   TFile *fout = new TFile("HTA.root","recreate");
  76   TH1F *hdC   = new TH1F("dC"  ,";delta Cerenkov (rad)",100,-0.2,0.2);
  77   TH1F *hCer  = new TH1F("Cer" ,"Theta Cerenkov (rad)",250,0.,0.75);
  78   TH2F *htvsp = new TH2F("tvsp",";momentum (GeV/c);theta Cerenkov (rad)",100,0.,5.,1000,0.,0.75);
  79   TH1F *hdth  = new TH1F("dth" ,";Delta theta Trk (mrad)",100,-250,250);
  80   TH1F *hdph  = new TH1F("dph" ,";Delta phi Trk (mrad)",100,-500,500);
  81   Double_t rd=TMath::RadToDeg();
  82   Printf("----------------------------------------------");
  83   Printf("| SimHTA:Utility to embed ESD from kinematics|");
  84   Printf("|     with  Hidden Track Algorithm (HTA)     |");
  85   Printf("----------------------------------------------");
  86   AliHMPIDTracker::SetFieldMap(gAL->GetAliRun()->Field(),kTRUE);
  87   AliHMPID *pH=(AliHMPID*)gAL->GetAliRun()->GetDetector("HMPID");
  88   Int_t mtid=-1;
  89   Int_t iNevt=gAL->GetNumberOfEvents();
  90
  91   Printf("Number of events to process: %i",iNevt);
  92
  93   for(Int_t iEvt=0;iEvt<iNevt;iEvt++){//events loop
  94     if(!(iEvt%50)) Printf("Events processed %i",iEvt);
  95     gAL->GetEvent(iEvt);
  96     pHL->TreeR()->GetEntry(0);
  97     AliStack *pStack=gAL->Stack();
  98
  99     for(Int_t i=0;i<pStack->GetNtrack();i++){
 100
 101       TParticle *pTrack=pStack->Particle(i);
 102       mtid=pTrack->GetFirstMother();
 103
 104       if(mtid>=0) continue; // only primaries
 105
 106       //find the chamber that intersects HMPID
 107       AliESDtrack trk(pTrack);
 108       Float_t xPc,yPc;
 109       Int_t iCh=AliHMPIDTracker::IntTrkCha(&trk,xPc,yPc);                           //get chamber intersected by this track
 110       if(iCh<0) continue;                                                           //no intersection at all, go after next track
 111       Float_t radX,radY,thetaTrk,phiTrk;
 112       trk.GetHMPIDtrk(radX,radY,thetaTrk,phiTrk);
 113 //      Printf("simulated track theta %f phi %f",thetaTrk*rd,phiTrk*rd);
 114       TObjArray *pClus = pH->CluLst();
 115
 116       if(AliHMPIDTracker::ReconHiddenTrk(iCh,&trk,(TClonesArray *)pClus->At(iCh),pNmean,pQthre)!=0) continue;
 117
 118       pEsd->AddTrack(&trk);
 119       Double_t thetaCerSim = TMath::ACos(pTrack->Energy()/(1.292*pTrack->P()));
 120 //      Printf(" theta Cerenkov simulated     %f",thetaCerSim);
 121 //      Printf(" theta Cerenkov reconstructed %f",trk.GetHMPIDsignal());
 122       Float_t thetaFit,phiFit;
 123       trk.GetHMPIDtrk(radX,radY,thetaFit,phiFit);
 124 //      Printf("reconstr. track theta %f phi %f",thetaFit*rd,phiFit*rd);
 125
 126       // fill useful histos
 127       hdC->Fill(trk.GetHMPIDsignal()-thetaCerSim);
 128       hCer->Fill(trk.GetHMPIDsignal());
 129       htvsp->Fill(pTrack->P(),trk.GetHMPIDsignal());
 130       hdth->Fill((thetaFit-thetaTrk)*1000);
 131       hdph->Fill((phiFit-phiTrk)*1000);
 132     }// track loop
 133     pEsd->SetMagneticField(AliHMPIDTracker::GetBz());
 134     gEsdTr->Fill();
 135     pEsd->Reset();
 136   }// event loop
 137   Printf("Events processed %i",iEvt);
 138   fout->Write();
 139   fout->Close();
 140   delete fout;
 141   gAL->UnloadHeader();  gAL->UnloadKinematics();
 142 }//EsdHidden()
 143 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 144 Bool_t OpenCalib()
 145 {
 146   AliCDBManager* pCDB = AliCDBManager::Instance();
 147   pCDB->SetDefaultStorage("local://$HOME");
 148   AliCDBEntry *pQthreEnt=pCDB->Get("HMPID/Calib/Qthre",0);
 149   AliCDBEntry *pNmeanEnt=pCDB->Get("HMPID/Calib/Nmean",0);
 150
 151   if(!pQthreEnt || !pNmeanEnt) return kFALSE;
 152
 153   pNmean=(TObjArray*)pNmeanEnt->GetObject();
 154   pQthre=(TObjArray*)pQthreEnt->GetObject();
 155
 156   if(!pQthre || !pNmean) return kFALSE;
 157   return kTRUE;
 158 }
 159 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++