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 "AliHMPIDRecoParamV1.h" //Recon()
8 #include "AliHMPIDReconstructor.h"//Recon()
9 #include "AliHMPIDReconHTA.h" //ReconHTA()
10 #include <AliESDEvent.h> //PropagateBack(),Recon()
11 #include <AliESDtrack.h> //Intersect()
12 #include <AliTracker.h>
13 #include <AliRun.h> //GetTrackPoint(),PropagateBack()
14 #include <AliTrackPointArray.h> //GetTrackPoint()
15 #include <AliAlignObj.h> //GetTrackPoint()
16 #include <AliCDBManager.h> //PropageteBack()
17 #include <AliCDBEntry.h> //PropageteBack()
19 // HMPID base class fo tracking
23 ClassImp(AliHMPIDTracker)
24 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
25 AliHMPIDTracker::AliHMPIDTracker():
27 fClu(new TObjArray(AliHMPIDParam::kMaxCh+1))
29 // ctor. Create TObjArray of TClonesArray of AliHMPIDCluster
32 fClu->SetOwner(kTRUE);
33 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) fClu->AddAt(new TClonesArray("AliHMPIDCluster"),i);
35 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
36 Bool_t AliHMPIDTracker::GetTrackPoint(Int_t idx, AliTrackPoint& point) const
38 // Interface callback methode invoked from AliReconstruction::WriteAlignmentData() to get position of MIP cluster in MARS associated to a current track.
39 // MIP cluster is reffered by index which is stored in AliESDtrack ???????
40 // Arguments: idx- cluster index which is stored by HMPID in AliESDtrack
41 // point- reference to the object where to store the point
42 // Returns: status of operation if FALSE then AliReconstruction::WriteAlignmentData() do not store this point to array of points for current track.
43 if(idx<0) return kFALSE; //no MIP cluster assigned to this track in PropagateBack()
44 Int_t iCham=idx/1000000; Int_t iClu=idx%1000000;
45 iClu = iClu%1000; //GetHMPIDcluIdx -> 1e+6*ch + 1e+3*clusize + cluIdx;
46 point.SetVolumeID(AliGeomManager::LayerToVolUID(AliGeomManager::kHMPID,iCham));//layer and chamber number
47 TClonesArray *pArr=(TClonesArray*)(*fClu)[iCham];
48 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pArr->UncheckedAt(iClu);//get pointer to cluster
50 pClu->GetGlobalXYZ(xyz);
52 pClu->GetGlobalCov(cov);
53 point.SetXYZ(xyz,cov);
56 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
57 Int_t AliHMPIDTracker::IntTrkCha(AliESDtrack *pTrk,Float_t &xPc,Float_t &yPc,Float_t &xRa,Float_t &yRa,Float_t &theta,Float_t &phi)
59 // Static method to find intersection in between given track and HMPID chambers
60 // Arguments: pTrk- ESD track; xPc,yPc- track intersection with PC in LORS [cm]
61 // Returns: intersected chamber ID or -1
62 AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk); //create a hmpid track to be used for propagation and matching
63 for(Int_t i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){ //chambers loop
64 Int_t chInt = IntTrkCha(i,hmpTrk,xPc,yPc,xRa,yRa,theta,phi);
65 if(chInt>=0) {delete hmpTrk;hmpTrk=0x0;return chInt;}
67 delete hmpTrk; hmpTrk=0x0;
68 return -1; //no intersection with HMPID chambers
70 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
71 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)
73 // Static method to find intersection in between given track and HMPID chambers
74 // Arguments: pTrk- HMPID track; xPc,yPc- track intersection with PC in LORS [cm]
75 // Returns: intersected chamber ID or -1
76 AliHMPIDParam *pParam=AliHMPIDParam::Instance();
79 pParam->Point(ch,p1,AliHMPIDParam::kRad); //point & norm for middle of radiator plane
82 pParam->Point(ch,p2,AliHMPIDParam::kPc); //point & norm for entrance to PC plane
83 if(pTrk->Intersect(p1,n1)==kFALSE) return -1; //try to intersect track with the middle of radiator
84 if(pTrk->Intersect(p2,n2)==kFALSE) return -1;
85 pParam->Mars2LorsVec(ch,n1,theta,phi); //track angles at RAD
86 pParam->Mars2Lors (ch,p1,xRa,yRa); //TRKxRAD position
87 pParam->Mars2Lors (ch,p2,xPc,yPc); //TRKxPC position
88 if(AliHMPIDParam::IsInside(xPc,yPc,pParam->DistCut())==kTRUE) return ch; //return intersected chamber
89 return -1; //no intersection with HMPID chambers
91 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
92 Int_t AliHMPIDTracker::LoadClusters(TTree *pCluTree)
94 // Interface callback methode invoked from AliReconstruction::RunTracking() to load HMPID clusters before PropagateBack() gets control. Done once per event.
95 // Arguments: pCluTree- pointer to clusters tree got by AliHMPIDLoader::LoadRecPoints("read") then AliHMPIDLoader::TreeR()
96 // Returns: error code (currently ignored in AliReconstruction::RunTraking())
97 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++) pCluTree->SetBranchAddress(Form("HMPID%d",i),&((*fClu)[i]));
98 pCluTree->GetEntry(0);
101 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
102 Int_t AliHMPIDTracker::PropagateBack(AliESDEvent *pEsd)
104 // Interface pure virtual in AliTracker. Invoked from AliReconstruction::RunTracking() after invocation of AliTracker::LoadClusters() once per event
105 // Agruments: pEsd - pointer to ESD
106 // Returns: error code
107 AliCDBEntry *pNmeanEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Nmean"); //contains TObjArray of 42 TF1 + 1 EPhotMean
108 AliCDBEntry *pQthreEnt =AliCDBManager::Instance()->Get("HMPID/Calib/Qthre"); //contains TObjArray of 42 (7ch * 6sec) TF1
109 if(!pNmeanEnt) AliError("No Nmean C6F14 ");
110 if(!pQthreEnt) AliError("No Qthre");
112 return Recon(pEsd,fClu,(TObjArray*)pNmeanEnt->GetObject(),(TObjArray*)pQthreEnt->GetObject());
114 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
115 Int_t AliHMPIDTracker::Recon(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
117 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
118 // Arguments: pEsd- pointer ESD; pClu- pointer to clusters for all chambers; pNmean - pointer to all function Nmean=f(time)
119 // Returns: error code, 0 if no errors
121 AliHMPIDRecon recon; //instance of reconstruction class, nothing important in ctor
122 AliHMPIDParam *pParam = AliHMPIDParam::Instance(); //Instance of AliHMPIDParam
123 Float_t xPc,yPc,xRa,yRa,theta,phi;
124 Double_t cluLORS[2]={0};
125 // Double_t cluMARS[3]={0},trkMARS[3]={0};
126 // Double_t bestcluMARS[3]={0,0,0};
127 // Double_t radClu,radInitTrk;
130 Double_t qthre = 0; Double_t nmean=0; Int_t hvsec=0;
131 Int_t nClusCh[AliHMPIDParam::kMaxCh+1];
134 for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){ //loop on the ESD tracks in the event
136 // Double_t bestChi2=99999;chi2=99999; //init. track matching params
137 Double_t dmin=999999,bz=0,distCut=1,distParams[5]={1};
139 Bool_t isOkDcut=kFALSE;
140 Bool_t isOkQcut=kFALSE;
141 Bool_t isMatched=kFALSE;
143 AliHMPIDCluster *bestHmpCluster=0x0; //the best matching cluster
144 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //get reconstructed track
146 if(!pTrk->IsOn(AliESDtrack::kTPCout)) continue;
148 if(pTrk->IsOn(AliESDtrack::kTPCrefit)) continue;
150 AliHMPIDtrack *hmpTrk = new AliHMPIDtrack(*pTrk); //create a hmpid track to be used for propagation and matching
151 bz=AliTracker::GetBz();
152 //initial flags for HMPID ESD infos
153 pTrk->SetHMPIDtrk(0,0,0,0); //no intersection found
154 pTrk->SetHMPIDmip(0,0,0,0); //store mip info in any case
155 pTrk->SetHMPIDcluIdx(99,99999); //chamber not found, mip not yet considered
156 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNotPerformed); //ring reconstruction not yet performed
158 Int_t ipCh=IntTrkCha(pTrk,xPc,yPc,xRa,yRa,theta,phi); //find the intersected chamber for this track
159 if(ipCh<0) continue; //no intersection at all, go after next track
161 pTrk->SetHMPIDtrk(xPc,yPc,theta,phi); //store initial infos
162 pTrk->SetHMPIDcluIdx(ipCh,9999); //set chamber, index of cluster + cluster size
164 // track intersects the chamber ipCh: find the MIP
166 TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh); //get the list of clusters
167 nMipClusTot = pMipCluLst->GetEntries(); //total number of clusters in the given chamber
168 nClusCh[ipCh] = nMipClusTot;
170 if(nMipClusTot==0) continue;
172 Int_t index=-1; //index of the "best" matching cluster
174 for (Int_t iClu=0; iClu<nMipClusTot;iClu++) { //clusters loop
176 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu); //get the cluster
178 if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) { // just for backward compatibility
179 qthre=((TF1*)pQthre->At(pClu->Ch()))->Eval(pEsd->GetTimeStamp()); //
180 } else { // in the past just 1 qthre
181 hvsec = pParam->InHVSector(pClu->Y()); // per chamber
183 qthre=((TF1*)pQthre->At(6*ipCh+hvsec))->Eval(pEsd->GetTimeStamp()); //
186 if(pClu->Q()<qthre) continue; //charge compartible with MIP clusters
189 cluLORS[0]=pClu->X(); cluLORS[1]=pClu->Y(); //get the LORS coordinates of the cluster
190 Double_t dist = TMath::Sqrt((xPc-cluLORS[0])*(xPc-cluLORS[0])+(yPc-cluLORS[1])*(yPc-cluLORS[1]));
200 pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
204 Double_t radius = (pParam->Lors2Mars(ipCh,pParam->SizeAllX()/2,pParam->SizeAllY()/2)).Mag();
206 if(!AliTracker::PropagateTrackToBxByBz(hmpTrk,radius,pTrk->GetMass(),1,kFALSE)) continue;
208 if(!hmpTrk->PropagateTo(bestHmpCluster)) continue;
210 Int_t cluSiz = bestHmpCluster->Size();
211 pTrk->SetHMPIDmip(bestHmpCluster->X(),bestHmpCluster->Y(),(Int_t)bestHmpCluster->Q(),0); //store mip info in any case
212 pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz); //set chamber, index of cluster + cluster size
214 if(AliHMPIDReconstructor::GetRecoParam()) //retrieve distance cut
216 if(AliHMPIDReconstructor::GetRecoParam()->IsFixedDistCut()==kTRUE) //distance cut is fixed number
218 distCut=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDist();
222 for(Int_t ipar=0;ipar<5;ipar++) distParams[ipar]=AliHMPIDReconstructor::GetRecoParam()->GetHmpTrackMatchingDistParam(ipar); //prevision: distance cut is function of momentum
223 distCut=distParams[0]+distParams[1]*TMath::Power(distParams[2]*pTrk->GetP(),distParams[3]); //prevision: change functional form to be more precise
226 else {distCut=pParam->DistCut();}
235 pTrk->SetHMPIDsignal(pParam->kMipDistCut); //closest cluster with enough charge is still too far from intersection
238 if(isOkQcut*isOkDcut) isMatched = kTRUE; // MIP-Track matched !!
240 if(!isMatched) continue; // If matched continue...
242 Bool_t isOk = hmpTrk->Update(bestHmpCluster,0.1,0);
244 pTrk->SetOuterHmpParam(hmpTrk,AliESDtrack::kHMPIDout);
246 FillResiduals(hmpTrk,bestHmpCluster,kFALSE);
250 if(pNmean->GetEntries()==21) { //for backward compatibility
251 nmean=((TF1*)pNmean->At(3*ipCh))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
253 Int_t iRad = pParam->Radiator(yRa); //evaluate the radiator involved
257 Double_t tLow = ((TF1*)pNmean->At(6*ipCh+2*iRad ))->Eval(pEsd->GetTimeStamp()); //C6F14 low temp for this chamber
258 Double_t tHigh = ((TF1*)pNmean->At(6*ipCh+2*iRad+1))->Eval(pEsd->GetTimeStamp()); //C6F14 high temp for this chamber
259 Double_t tExp = pParam->FindTemp(tLow,tHigh,yRa); //estimated temp for that chamber at that y
260 nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp); //mean ref idx @ a given temp
262 if(nmean < 0){ //track didn' t pass through the radiator
263 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad); //set the appropriate flag
264 pTrk->SetHMPIDcluIdx(ipCh,index+1000*cluSiz); //set index of cluster
269 recon.SetImpPC(xPc,yPc); //store track impact to PC
270 recon.CkovAngle(pTrk,(TClonesArray *)pClus->At(ipCh),index,nmean,xRa,yRa); //search for Cerenkov angle of this track
272 if(pTrk->GetHMPIDsignal()<0) continue;
276 pID.FindPid(pTrk,5,prob);
277 pTrk->SetHMPIDpid(prob);
278 // 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);
280 delete hmpTrk;hmpTrk=0x0;
283 return 0; // error code: 0=no error;
285 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
286 Int_t AliHMPIDTracker::ReconHiddenTrk(AliESDEvent *pEsd,TObjArray *pClus,TObjArray *pNmean, TObjArray *pQthre)
288 // Static method to reconstruct Theta Ckov for all valid tracks of a given event.
289 // 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)
290 // Returns: error code, 0 if no errors
292 AliHMPIDReconHTA reconHTA; //instance of reconstruction class, nothing important in ctor
294 AliHMPIDParam *pParam = AliHMPIDParam::Instance(); //Instance of AliHMPIDParam
296 for(Int_t iTrk=0;iTrk<pEsd->GetNumberOfTracks();iTrk++){ //loop on the ESD tracks in the event
298 AliESDtrack *pTrk = pEsd->GetTrack(iTrk); //here it is simulated or just empty track
300 ipCh = pTrk->GetHMPIDcluIdx();ipCh/=1000000;
303 TClonesArray *pMipCluLst=(TClonesArray *)pClus->At(ipCh); //get the list of clusters
304 Int_t nMipClusTot = pMipCluLst->GetEntries(); //total number of clusters in the given chamber
313 for (Int_t iClu=0; iClu<nMipClusTot;iClu++) { //clusters loop
315 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pMipCluLst->UncheckedAt(iClu); //get the cluster
316 Double_t qClus = pClu->Q();
323 cluMipSiz = pClu->Size();
327 if(chMip<0) return 1;
332 if(pQthre->GetEntriesFast()==pParam->kMaxCh+1) { // just for backward compatibility
333 qthre=((TF1*)pQthre->At(chMip))->Eval(pEsd->GetTimeStamp()); //
334 } else { // in the past just 1 qthre
335 hvsec = pParam->InHVSector(yMip); // per chamber
336 if(hvsec>=0) qthre=((TF1*)pQthre->At(6*chMip+hvsec))->Eval(pEsd->GetTimeStamp()); //
340 pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0); //store mip info in any case
341 pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
342 pTrk->SetHMPIDsignal(pParam->kMipQdcCut);
343 return 1; //charge compatible with MIP clusters
346 pTrk->SetHMPIDmip(xMip,yMip,(Int_t)qMip,0); //store mip info in any case
347 pTrk->SetHMPIDcluIdx(chMip,indMip+1000*cluMipSiz);
349 Double_t yRa = yMip; //just an approx...
352 if(pNmean->GetEntries()==21) { //for backward compatibility
353 nmean=((TF1*)pNmean->At(3*chMip))->Eval(pEsd->GetTimeStamp()); //C6F14 Nmean for this chamber
355 Int_t iRad = pParam->Radiator(yRa); //evaluate the radiator involved
359 Double_t tLow = ((TF1*)pNmean->At(6*chMip+2*iRad ))->Eval(pEsd->GetTimeStamp()); //C6F14 low temp for this chamber
360 Double_t tHigh = ((TF1*)pNmean->At(6*chMip+2*iRad+1))->Eval(pEsd->GetTimeStamp()); //C6F14 high temp for this chamber
361 Double_t tExp = pParam->FindTemp(tLow,tHigh,yRa); //estimated temp for that chamber at that y
362 nmean = pParam->NIdxRad(AliHMPIDParam::Instance()->GetEPhotMean(),tExp); //mean ref idx @ a given temp
364 if(nmean < 0){ //track didn' t pass through the radiator
365 pTrk->SetHMPIDsignal(AliHMPIDRecon::kNoRad); //set the appropriate flag
370 if(!reconHTA.CkovHiddenTrk(pTrk,(TClonesArray *)pClus->At(ipCh),indMip,nmean)) { //search for track parameters and Cerenkov angle of this track
373 pID.FindPid(pTrk,5,prob);
374 pTrk->SetHMPIDpid(prob);
376 // 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);
379 return 0; // error code: 0=no error;
382 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
383 void AliHMPIDTracker::FillClusterArray(TObjArray* array) const {
385 // Publishes all pointers to clusters known to the tracker into the
386 // passed object array.
387 // The ownership is not transfered - the caller is not expected to delete
390 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){
391 TClonesArray *pCluArr=(TClonesArray*)(*fClu)[iCh];
392 for (Int_t iClu=0; iClu<pCluArr->GetEntriesFast();iClu++){
393 AliHMPIDCluster *pClu=(AliHMPIDCluster*)pCluArr->UncheckedAt(iClu);
394 array->AddLast(pClu);
395 }//cluster loop in iCh
401 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++