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 "AliHMPIDReconHTA.h" //ReconHTA()
8 #include <AliESDEvent.h> //PropagateBack(),Recon()
9 #include <AliESDtrack.h> //Intersect()
10 #include <AliTracker.h>
11 #include <AliRun.h> //GetTrackPoint(),PropagateBack()
12 #include <AliTrackPointArray.h> //GetTrackPoint()
13 #include <AliAlignObj.h> //GetTrackPoint()
14 #include <AliCDBManager.h> //PropageteBack()
15 #include <AliCDBEntry.h> //PropageteBack()
17 // HMPID base class fo tracking
21 ClassImp(AliHMPIDTracker)
22 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
23 AliHMPIDTracker::AliHMPIDTracker():
25 fClu(new TObjArray(AliHMPIDParam::kMaxCh+1))
27 // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster
30 fClu->SetOwner(kTRUE);
31 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
33 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
34 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
36 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
37 // MIP cluster is reffered by index which is stored in AliESDtrack ???????
38 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
39 // point- reference to the object where to store the point
40 // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
41 if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
42 Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
43 iClu = iClu%1000; //GetHMPIDcluIdx -> 1e+6*ch + 1e+3*clusize + cluIdx;
44 point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham));//layer and chamber number
45 TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
46 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
48 pClu->GetGlobalXYZ(xyz);
50 pClu->GetGlobalCov(cov);
51 point.SetXYZ(xyz,cov);
54 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
55 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
57 // Static method to find intersection in between given track and HMPID chambers
58 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
59 // Returns: intersected chamber ID or -1
60 AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk); //create a hmpid track to be used for propagation and matching
61 for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){ //chambers loop
62 Int_t chInt = IntTrkCha(i,hmpTrk,xPc,yPc,xRa,yRa,theta,phi);
63 if(chInt>=0) {delete hmpTrk;hmpTrk=0x0;return chInt;}
65 delete hmpTrk; hmpTrk=0x0;
66 return -1; //no intersection with HMPID chambers
68 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
69 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)
71 // Static method to find intersection in between given track and HMPID chambers
72 // Arguments: pTrk- HMPID track; xPc,yPc- track intersection with PC in LORS [cm]
73 // Returns: intersected chamber ID or -1
74 AliHMPIDParam *pParam=AliHMPIDParam::Instance();
77 pParam->Point(ch,p1,AliHMPIDParam::kRad); //point & norm for middle of radiator plane
80 pParam->Point(ch,p2,AliHMPIDParam::kPc); //point & norm for entrance to PC plane
81 if(pTrk->Intersect(p1,n1)==kFALSE) return -1; //try to intersect track with the middle of radiator
82 if(pTrk->Intersect(p2,n2)==kFALSE) return -1;
83 pParam->Mars2LorsVec(ch,n1,theta,phi); //track angles at RAD
84 pParam->Mars2Lors (ch,p1,xRa,yRa); //TRKxRAD position
85 pParam->Mars2Lors (ch,p2,xPc,yPc); //TRKxPC position
86 if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return ch; //return intersected chamber
87 return -1; //no intersection with HMPID chambers
89 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
90 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
92 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
93 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
94 // Returns: error code (currently ignored in AliReconstruction::RunTraking())
95 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
96 pCluTree->GetEntry(0);
99 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
100 Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd)
102 // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event
103 // Agruments: pEsd - pointer to ESD
104 // Returns: error code
105 AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 42 TF1 + 1 EPhotMean
106 AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 42 (7ch * 6sec) TF1
107 if(!pNmeanEnt) AliError("No Nmean C6F14 ");
108 if(!pQthreEnt) AliError("No Qthre");
110 return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject());
112 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
113 Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
115 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
116 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
117 // Returns: error code, 0 if no errors
119 AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor
120 Float_t xPc,yPc,xRa,yRa,theta,phi;
121 Double_t cluLORS[2]={0};
122 // Double_t cluMARS[3]={0},trkMARS[3]={0};
123 // Double_t bestcluMARS[3]={0,0,0};
124 // Double_t radClu,radInitTrk;
127 Double_t qthre = 0; Double_t nmean=0; Int_t hvsec=0;
128 Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
130 AliHMPIDParam *pParam = AliHMPIDParam::Instance(); //Instance of AliHMPIDParam
132 for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){ //loop on the ESD tracks in the event
134 // Double_t bestChi2=99999;chi2=99999; //init. track matching params
135 Double_t dmin=999999,bz=0;
137 Bool_t isOkDcut=kFALSE;
138 Bool_t isOkQcut=kFALSE;
139 Bool_t isMatched=kFALSE;
141 AliHMPIDCluster *bestHmpCluster=0x0; //the best matching cluster
142 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get reconstructed track
144 if(!pTrk->IsOn(AliESDtrack::kTPCout)) continue;
146 if(pTrk->IsOn(AliESDtrack::kTPCrefit)) continue;
148 AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk); //create a hmpid track to be used for propagation and matching
149 bz=AliTracker::GetBz();
150 //initial flags for HMPID ESD infos
151 pTrk->SetHMPIDtrk(0,0,0,0); //no intersection found
152 pTrk->SetHMPIDmip(0,0,0,0); //store mip info in any case
153 pTrk->SetHMPIDcluIdx(99,99999); //chamber not found, mip not yet considered
154 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed); //ring reconstruction not yet performed
156 Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi); //find the intersected chamber for this track
158 if(ipCh<0) continue; //no intersection at all, go after next track
160 pTrk->SetHMPIDtrk(xPc,yPc,theta,phi); //store initial infos
161 pTrk->SetHMPIDcluIdx(ipCh,9999); //set chamber, index of cluster + cluster size
163 // track intersects the chamber ipCh: find the MIP
165 TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh); //get the list of clusters
166 nMipClusTot = pMipCluLst->GetEntries(); //total number of clusters in the given chamber
167 nClusCh[ipCh] = nMipClusTot;
169 if(nMipClusTot==0) continue;
171 Int_t index=-1; //index of the "best" matching cluster
173 for (Int_t iClu=0; iClu<nMipClusTot;iClu++) { //clusters loop
175 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu); //get the cluster
177 if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) { // just for backward compatibility
178 qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(pEsd->GetTimeStamp()); //
179 } else { // in the past just 1 qthre
180 hvsec = pParam->InHVSector(pClu->Y()); // per chamber
182 qthre=((TF1*)pQthre->At(6*ipCh+hvsec))->Eval(pEsd->GetTimeStamp()); //
185 if(pClu->Q()<qthre) continue; //charge compartible with MIP clusters
188 cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y(); //get the LORS coordinates of the cluster
189 Double_t dist = TMath::Sqrt((xPc-cluLORS[0])*(xPc-cluLORS[0])+(yPc-cluLORS[1])*(yPc-cluLORS[1]));
198 pParam->Lors2Mars(ipCh,cluLORS[0],cluLORS[1],cluMARS); //convert cluster coors. from LORS to MARS
199 radClu=TMath::Sqrt(cluMARS[0]*cluMARS[0]+cluMARS[1]*cluMARS[1]); //radial distance of candidate cluster in MARS
201 hmpTrk->GetXYZ(trkx0); //get track position in MARS
202 radInitTrk=TMath::Sqrt(trkx0[0]*trkx0[0]+trkx0[1]*trkx0[1]);
203 hmpTrk->PropagateToR(radClu,10);
204 hmpTrk->GetXYZ(trkx0); //get track position in MARS
205 hmpTrk->GetXYZAt(radClu,bz,trkMARS); //get the track coordinates at the rad distance after prop.
206 d3d=TMath::Sqrt((cluMARS[0]-trkMARS[0])*(cluMARS[0]-trkMARS[0])+(cluMARS[1]-trkMARS[1])*(cluMARS[1]-trkMARS[1])+(cluMARS[2]-trkMARS[2])*(cluMARS[2]-trkMARS[2]));
207 chi2=hmpTrk->GetPredictedChi2(pClu);
208 if(dmin > d3d ) { + //to be saved for the moment...
209 cluSiz = pClu->Size();
214 cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y();
215 // pParam->Lors2Mars(ipCh,cluLORS[0],cluLORS[1],bestcluMARS);
220 pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
224 Double_t radius = (pParam->Lors2Mars(ipCh,pParam->SizeAllX()/2,pParam->SizeAllY()/2)).Mag();
226 if(!AliTracker::PropagateTrackTo(hmpTrk,radius,pTrk->GetMass(),1,kFALSE)) continue;
228 if(!hmpTrk->PropagateTo(bestHmpCluster)) continue;
230 Int_t cluSiz = bestHmpCluster->Size();
231 pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0); //store mip info in any case
232 pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz); //set chamber, index of cluster + cluster size
234 if(dmin < pParam->DistCut()) {
239 pTrk->SetHMPIDsignal(pParam->kMipDistCut); //closest cluster with enough charge is still too far from intersection
242 if(isOkQcut*isOkDcut) isMatched = kTRUE; // MIP-Track matched !!
244 if(!isMatched) continue; // If matched continue...
246 Bool_t isOk = hmpTrk->Update(bestHmpCluster,0.1,0);
248 pTrk->SetOuterHmpParam(hmpTrk,AliESDtrack::kHMPIDout);
250 FillResiduals(hmpTrk,bestHmpCluster,kFALSE);
254 for(Int_t iC=0;iC<ipCh;iC++) indexAll+=nClusCh[iC]; indexAll+=index; //to be verified...
256 Bool_t isOk = hmpTrk->Update(bestHmpCluster,bestChi2,indexAll);
258 pTrk->SetOuterParam(hmpTrk,AliESDtrack::kHMPIDout);
260 cham=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi);
262 if(cham<0) { //no intersection at all, go after next track
263 pTrk->SetHMPIDtrk(0,0,0,0); //no intersection found
264 pTrk->SetHMPIDcluIdx (99,99999); //chamber not found, mip not yet considered
265 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed); //ring reconstruction not yet performed
270 if(pNmean->GetEntries()==21) { //for backward compatibility
271 nmean=((TF1*)pNmean->At(3*ipCh))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
273 Int_t iRad = pParam->Radiator(yRa); //evaluate the radiator involved
277 Double_t tLow = ((TF1*)pNmean->At(6*ipCh+2*iRad ))->Eval(pEsd->GetTimeStamp()); //C6F14 low temp for this chamber
278 Double_t tHigh = ((TF1*)pNmean->At(6*ipCh+2*iRad+1))->Eval(pEsd->GetTimeStamp()); //C6F14 high temp for this chamber
279 Double_t tExp = pParam->FindTemp(tLow,tHigh,yRa); //estimated temp for that chamber at that y
280 nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp); //mean ref idx @ a given temp
282 if(nmean < 0){ //track didn' t pass through the radiator
283 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad); //set the appropriate flag
284 pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz); //set index of cluster
289 recon.SetImpPC(xPc,yPc); //store track impact to PC
290 recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(ipCh),index,nmean,xRa,yRa); //search for Cerenkov angle of this track
294 pID.FindPid(pTrk,5,prob);
295 pTrk->SetHMPIDpid(prob);
296 // 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);
298 delete hmpTrk;hmpTrk=0x0;
301 return 0; // error code: 0=no error;
303 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
304 Int_t AliHMPIDTracker::ReconHiddenTrk(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
306 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
307 // 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)
308 // Returns: error code, 0 if no errors
310 AliHMPIDReconHTA reconHTA; //instance of reconstruction class, nothing important in ctor
312 AliHMPIDParam *pParam = AliHMPIDParam::Instance(); //Instance of AliHMPIDParam
314 for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){ //loop on the ESD tracks in the event
316 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //here it is simulated or just empty track
318 ipCh = pTrk->GetHMPIDcluIdx();ipCh/=1000000;
321 TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh); //get the list of clusters
322 Int_t nMipClusTot = pMipCluLst->GetEntries(); //total number of clusters in the given chamber
331 for (Int_t iClu=0; iClu<nMipClusTot;iClu++) { //clusters loop
333 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu); //get the cluster
334 Double_t qClus = pClu->Q();
341 cluMipSiz = pClu->Size();
345 if(chMip<0) return 1;
350 if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) { // just for backward compatibility
351 qthre=((TF1*)pQthre->At(chMip))->Eval(pEsd->GetTimeStamp()); //
352 } else { // in the past just 1 qthre
353 hvsec = pParam->InHVSector(yMip); // per chamber
354 if(hvsec>=0) qthre=((TF1*)pQthre->At(6*chMip+hvsec))->Eval(pEsd->GetTimeStamp()); //
358 pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0); //store mip info in any case
359 pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
360 pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
361 return 1; //charge compatible with MIP clusters
364 pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0); //store mip info in any case
365 pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
367 Double_t yRa = yMip; //just an approx...
370 if(pNmean->GetEntries()==21) { //for backward compatibility
371 nmean=((TF1*)pNmean->At(3*chMip))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
373 Int_t iRad = pParam->Radiator(yRa); //evaluate the radiator involved
377 Double_t tLow = ((TF1*)pNmean->At(6*chMip+2*iRad ))->Eval(pEsd->GetTimeStamp()); //C6F14 low temp for this chamber
378 Double_t tHigh = ((TF1*)pNmean->At(6*chMip+2*iRad+1))->Eval(pEsd->GetTimeStamp()); //C6F14 high temp for this chamber
379 Double_t tExp = pParam->FindTemp(tLow,tHigh,yRa); //estimated temp for that chamber at that y
380 nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp); //mean ref idx @ a given temp
382 if(nmean < 0){ //track didn' t pass through the radiator
383 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad); //set the appropriate flag
388 if(!reconHTA.CkovHiddenTrk(pTrk,(TClonesArray *)pClus->At(ipCh),indMip,nmean)) { //search for track parameters and Cerenkov angle of this track
391 pID.FindPid(pTrk,5,prob);
392 pTrk->SetHMPIDpid(prob);
394 // 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);
397 return 0; // error code: 0=no error;
400 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
401 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {
403 // Publishes all pointers to clusters known to the tracker into the
404 // passed object array.
405 // The ownership is not transfered - the caller is not expected to delete
408 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){
409 TClonesArray *pCluArr=(TClonesArray*)(*fClu)[iCh];
410 for (Int_t iClu=0; iClu<pCluArr->GetEntriesFast();iClu++){
411 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluArr->UncheckedAt(iClu);
412 array->AddLast(pClu);
413 }//cluster loop in iCh
419 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++