1 #include "AliHMPIDTracker.h" //class header
2 #include "AliHMPIDCluster.h" //GetTrackPoint(),PropagateBack()
3 #include "AliHMPIDParam.h" //GetTrackPoint(),PropagateBack()
4 #include "AliHMPIDRecon.h" //Recon()
5 #include "AliHMPIDReconHTA.h" //ReconHTA()
6 #include <AliESDEvent.h> //PropagateBack(),Recon()
7 #include <AliESDtrack.h> //Intersect()
8 #include <AliRun.h> //GetTrackPoint(),PropagateBack()
9 #include <AliTrackPointArray.h> //GetTrackPoint()
10 #include <AliAlignObj.h> //GetTrackPoint()
11 #include <AliCDBManager.h> //PropageteBack()
12 #include <AliCDBEntry.h> //PropageteBack()
14 // HMPID base class fo tracking
18 ClassImp(AliHMPIDTracker)
19 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
20 AliHMPIDTracker::AliHMPIDTracker():
22 fClu(new TObjArray(AliHMPIDParam::kMaxCh+1))
24 // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster
27 fClu->SetOwner(kTRUE);
28 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
30 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
31 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
33 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
34 // MIP cluster is reffered by index which is stored in AliESDtrack ???????
35 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
36 // point- reference to the object where to store the point
37 // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
38 if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
39 Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
40 point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham-1));//layer and chamber number
41 TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
42 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
44 AliHMPIDParam::Instance()->Lors2Mars(iCham,pClu->X(),pClu->Y(),mars);
45 point.SetXYZ(mars[0],mars[1],mars[2]);
48 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
49 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
51 // Static method to find intersection in between given track and HMPID chambers
52 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
53 // Returns: intersected chamber ID or -1
54 AliHMPIDParam *pParam=AliHMPIDParam::Instance();
55 for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){ //chambers loop
56 Double_t p1[3],n1[3]; pParam->Norm(i,n1); pParam->Point(i,p1,AliHMPIDParam::kRad); //point & norm for middle of radiator plane
57 Double_t p2[3],n2[3]; pParam->Norm(i,n2); pParam->Point(i,p2,AliHMPIDParam::kPc); //point & norm for entrance to PC plane
58 if(pTrk->Intersect(p1,n1,-GetBz())==kFALSE) continue; //try to intersect track with the middle of radiator
59 if(pTrk->Intersect(p2,n2,-GetBz())==kFALSE) continue; //try to intersect track with PC
60 pParam->Mars2LorsVec(i,n1,theta,phi); //track angles at RAD
61 pParam->Mars2Lors (i,p1,xRa,yRa); //TRKxRAD position
62 pParam->Mars2Lors (i,p2,xPc,yPc); //TRKxPC position
63 if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return i; //return intersected chamber
65 return -1; //no intersection with HMPID chambers
67 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
68 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
70 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
71 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
72 // Returns: error code (currently ignored in AliReconstruction::RunTraking())
73 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
74 pCluTree->GetEntry(0);
77 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
78 Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd)
80 // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event
81 // Agruments: pEsd - pointer to ESD
82 // Returns: error code
83 AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 21 TF1
84 AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 42 (7ch * 6sec) TF1
85 if(!pNmeanEnt) AliFatal("No Nmean C6F14 ");
86 if(!pQthreEnt) AliFatal("No Qthre");
88 return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject());
90 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
91 Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
93 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
94 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
95 // Returns: error code, 0 if no errors
96 AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor
97 Float_t xPc,yPc,xRa,yRa,theta,phi;
98 for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){ //ESD tracks loop
99 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get reconstructed track
100 Int_t cham=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi); //get chamber intersected by this track
101 if(cham<0) { //no intersection at all, go after next track
102 pTrk->SetHMPIDtrk(0,0,0,0); //no intersection found
103 pTrk->SetHMPIDcluIdx (99,99999); //chamber not found, mip not yet considered
104 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed); //ring reconstruction not yet performed
107 pTrk->SetHMPIDtrk(xRa,yRa,theta,phi); //store initial infos
108 Double_t nmean=((TF1*)pNmean->At(3*cham))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
110 if(pQthre->GetEntriesFast()==AliHMPIDParam::kMaxCh+1) // just for backward compatibility
111 qthre=((TF1*)pQthre->At(cham))->Eval(pEsd->GetTimeStamp()); //
112 else { // in the past just 1 qthre
113 Int_t hvsec = AliHMPIDParam::InHVSector(yPc); // per chamber
115 qthre=((TF1*)pQthre->At(6*cham+hvsec))->Eval(pEsd->GetTimeStamp()); //
117 recon.SetImpPC(xPc,yPc); //store track impact to PC
118 recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(cham),nmean,qthre); //search for Cerenkov angle of this track
119 // Printf("AliHMPIDTracker::Recon: nmean %f, qthre %f",nmean,qthre);
121 return 0; // error code: 0=no error;
123 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
124 Int_t AliHMPIDTracker::ReconHiddenTrk(Int_t iCh,Int_t iHVsec,AliESDtrack *pTrk,TClonesArray *pCluLst,TObjArray *pNmean,TObjArray *pQthre)
126 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
127 // 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)
128 // Returns: error code, 0 if no errors
129 AliHMPIDReconHTA reconHTA; //instance of reconstruction class, nothing important in ctor
130 Double_t nmean=((TF1*)pNmean->At(3*iCh))->Eval(0); //C6F14 Nmean for this chamber
132 if(pQthre->GetEntriesFast()==AliHMPIDParam::kMaxCh+1) //
133 qthre=((TF1*)pQthre->At(iCh))->Eval(0); //just for backward compatibi
134 else qthre=((TF1*)pQthre->At(6*iCh+iHVsec))->Eval(0); //
135 if(pCluLst->GetEntriesFast()<4) return 1; //min 4 clusters (3 + 1 mip) to find a ring!
136 if(reconHTA.CkovHiddenTrk(pTrk,pCluLst,nmean,qthre)) return 0; //search for track parameters and Cerenkov angle of this track
137 else return 1; // error code: 0=no error,1=fit not performed;
139 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
140 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {
142 // Publishes all pointers to clusters known to the tracker into the
143 // passed object array.
144 // The ownership is not transfered - the caller is not expected to delete
147 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){
148 TClonesArray *pCluArr=(TClonesArray*)(*fClu)[iCh];
149 for (Int_t iClu=0; iClu<pCluArr->GetEntriesFast();iClu++){
150 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluArr->UncheckedAt(iClu);
151 array->AddLast(pClu);
152 }//cluster loop in iCh
158 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++