1 #include "AliRICHTracker.h" //class header
3 #include "AliRICHRecon.h"
4 #include "AliRICHParam.h"
5 #include "AliRICHCluster.h"
7 #include <TGeoManager.h> //EsdQA()
9 #include <TTree.h> //EsdQA()
10 #include <TFile.h> //EsdQA()
11 #include <TProfile.h> //EsdQA()
12 #include "AliRICHHelix.h"
15 #include <TParticle.h>
18 #include <TNtupleD.h> //RecWithStack();
19 #include <AliTrackPointArray.h> //GetTrackPoint()
20 #include <AliAlignObj.h> //GetTrackPoint()
21 #include <TH1F.h> //EsdQA()
22 #include <TH2F.h> //EsdQA()
23 #include <TCanvas.h> //EsdQA()
24 ClassImp(AliRICHTracker)
25 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
26 AliRICHTracker::AliRICHTracker():AliTracker()
28 // AliRICHTracker is created from AliReconstraction::Run() which invokes AliReconstraction::CreateTrackers()
29 // which in turn invokes AliRICHReconstructor::CreateTracker().
30 // Note that this is done just once per session before AliReconstruction::Run() goes to events loop.
32 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
33 Bool_t AliRICHTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
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 RICH 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;
42 Int_t iClu=idx%1000000;
43 point.SetVolumeID(AliAlignObj::LayerToVolUID(AliAlignObj::kRICH,iCham-1));//layer and chamber number
44 AliRICH *pRich=((AliRICH*)gAlice->GetDetector("RICH"));
45 AliRICHCluster *pClu=(AliRICHCluster*)pRich->CluLst(iCham)->UncheckedAt(iClu);//get pointer to cluster
46 TVector3 mars=AliRICHParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y());
47 point.SetXYZ(mars.X(),mars.Y(),mars.Z());
50 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
51 Int_t AliRICHTracker::LoadClusters(TTree *pCluTree)
53 // Interface callback methode invoked from AliReconstruction::RunTracking() to load RICH clusters before PropagateBack() gets control
54 // Arguments: pCluTree- pointer to clusters tree got by AliRICHLoader::LoadRecPoints("read") then AliRICHLoader::TreeR()
55 // Returns: error code (currently ignored in AliReconstruction::RunTraking())
56 AliDebug(1,"Start."); pCluTree->GetEntry(0); AliDebug(1,"Stop."); return 0;
58 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
59 Int_t AliRICHTracker::PropagateBack(AliESD *pESD)
61 // Interface callback methode invoked by AliRecontruction::RunTracking() during tracking after TOF. It's done just once per event
62 // Arguments: pESD - pointer to Event Summary Data class instance which contains a list of tracks
63 // Returns: error code, 0 if no errors
64 Int_t iNtracks=pESD->GetNumberOfTracks(); AliDebug(1,Form("Start with %i tracks",iNtracks));
65 AliRICH *pRich=((AliRICH*)gAlice->GetDetector("RICH"));
66 AliRICHRecon recon; //instance of reconstruction class, nothing important in ctor
68 AliRICHParam *pParam=AliRICHParam::Instance();
70 for(Int_t iTrk=0;iTrk<iNtracks;iTrk++){ //ESD tracks loop
71 AliESDtrack *pTrk = pESD->GetTrack(iTrk); //get next reconstructed track
73 Float_t xRa=0,yRa=0,xPc=0,yPc=0,th=0,ph=0; //track intersection point and angles, LORS
74 Int_t iCh=-1; //intersected chamber
75 for(Int_t i=0;i<7;i++){ //chambers loop
76 Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Lors2Mars(i,0,0,p1,AliRICHParam::kRad); //point & norm for RAD
77 Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Lors2Mars(i,0,0,p2,AliRICHParam::kPc); //point & norm for PC
79 if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator
80 if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC
82 pParam->Mars2LorsVec(i,n1,th,ph); //track angles
83 pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position
84 pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position
86 if(AliRICHDigit::IsInside(xPc,yPc)==kFALSE) continue; //not in active area
91 if(iCh==-1) continue; //no intersection at all, go after next track
93 TClonesArray *pCluLst=pRich->CluLst(iCh); //get clusters list for intersected chamber
95 Double_t dMin=999; //distance between track-PC intersection point and current cluster
96 Int_t iMip=-1; //index of cluster nearest to intersection point
97 for(Int_t iClu=0;iClu<pCluLst->GetEntries();iClu++){ //clusters loop for intersected chamber
98 AliRICHCluster *pClu=(AliRICHCluster*)pCluLst->At(iClu); //get pointer to current cluster
99 if(pClu->Q()<100) continue; //QDC is incompartible with mip, go after another one
101 Float_t dX=xPc-pClu->X(); //distance between current cluster and intersection point
102 Float_t dY=yPc-pClu->Y();
103 Float_t d =TMath::Sqrt(dX*dX+dY*dY);
105 if( d < dMin) {iMip=iClu; dMin=d;} //current cluster is closer, overwrite data for min cluster
106 }//clusters loop for intersected chamber
108 // pTrk->SetRICHtrk (xPc,yPc,th,ph); //store track info
109 // if(iMip==-1) {pTrk->SetRICHsignal (kMipQdcCut); continue;} //no clusters with QDC more the threshold at all
111 // AliRICHCluster *pMipClu=(AliRICHCluster*)pCluLst->At(iMip); //take mip cluster
113 // pTrk->SetRICHmip (pMipClu->X(),pMipClu->Y(),pMipClu->Q()); //store mip info
114 if(dMin>1) {pTrk->SetRICHsignal (kMipDistCut); continue;} //closest cluster with enough charge is still too far
115 // pTrk->SetRICHcluIdx (iCh,iMip); //set mip cluster index
116 recon.SetTrack(th,ph,xRa,yRa); Int_t iNphot=0; //initialize track parameters
117 pTrk->SetRICHsignal (recon.CkovAngle(pCluLst,iNphot)); //search for Cerenkov angle for this track
118 pTrk->SetRICHchi2 (recon.CkovSigma2()); //error squared
119 // pTrk->SetRICHmip (pMipClu->X(),pMipClu->Y(),pMipClu->Q(),iMip); //info on mip cluster + n. phot.
120 Printf("Ch=%i MIP-TRK=%5.2f cm Th=%f+-%f", iCh, dMin,pTrk->GetRICHsignal(),pTrk->GetRICHchi2());
122 AliDebug(1,"Stop pattern recognition");
123 return 0; // error code: 0=no error;
125 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++