1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
16 // HMPID base class to reconstruct an event
20 #include "AliHMPIDReconstructor.h" //class header
21 #include "AliHMPID.h" //Reconstruct()
22 #include "AliHMPIDCluster.h" //Dig2Clu()
23 #include "AliHMPIDParam.h" //FillEsd()
24 #include <AliCDBEntry.h> //ctor
25 #include <AliCDBManager.h> //ctor
26 #include <AliESDEvent.h> //FillEsd()
27 #include <AliRawReader.h> //Reconstruct() for raw digits
28 #include "AliHMPIDRawStream.h" //ConvertDigits()
29 #include "AliHMPIDRecoParam.h" //ctor
30 ClassImp(AliHMPIDReconstructor)
32 AliHMPIDRecoParam* AliHMPIDReconstructor::fgkRecoParam =0; //
33 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
34 AliHMPIDReconstructor::AliHMPIDReconstructor():AliReconstructor(),fUserCut(0),fDaqSig(0),fDig(0),fClu(0)
39 AliHMPIDParam::Instance(); //geometry loaded for reconstruction
40 fUserCut = new Int_t[7];
41 fClu=new TObjArray(AliHMPIDParam::kMaxCh+1); fClu->SetOwner(kTRUE);
42 fDig=new TObjArray(AliHMPIDParam::kMaxCh+1); fDig->SetOwner(kTRUE);
44 for(int i=AliHMPIDParam::kMinCh;i<=AliHMPIDParam::kMaxCh;i++){
45 fDig->AddAt(new TClonesArray("AliHMPIDDigit"),i);
46 TClonesArray *pClus = new TClonesArray("AliHMPIDCluster");
47 pClus->SetUniqueID(i);
51 if(fgkRecoParam!=0x0 && fgkRecoParam->GetUserCutMode()==kFALSE)
53 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++) {
54 fUserCut[iCh] = fgkRecoParam->GetUserCut(iCh);
55 Printf("HMPID: UserCut successfully loaded (from RecoParam) for chamber %i -> %i ",iCh,fUserCut[iCh]);
59 AliCDBEntry *pUserCutEnt =AliCDBManager::Instance()->Get("HMPID/Calib/UserCut"); //contains TObjArray of 14 TObject with n. of sigmas to cut charge
61 TObjArray *pUserCut = (TObjArray*)pUserCutEnt->GetObject();
62 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){ //chambers loop
63 fUserCut[iCh] = pUserCut->At(iCh)->GetUniqueID();
64 Printf("HMPID: UserCut successfully loaded (from OCDB) for chamber %i -> %i ",iCh,fUserCut[iCh]);
69 AliCDBEntry *pDaqSigEnt =AliCDBManager::Instance()->Get("HMPID/Calib/DaqSig"); //contains TObjArray of TObjArray 14 TMatrixF sigmas values for pads
70 if(!pDaqSigEnt) AliFatal("No pedestals from DAQ!");
71 fDaqSig = (TObjArray*)pDaqSigEnt->GetObject();
72 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){ //chambers loop
73 Printf(" HMPID: DaqSigCut successfully loaded for chamber %i -> %i ",iCh,(Int_t)fDaqSig->At(iCh)->GetUniqueID());
75 }//AliHMPIDReconstructor
76 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
77 void AliHMPIDReconstructor::Dig2Clu(TObjArray *pDigAll,TObjArray *pCluAll,Bool_t isTryUnfold)
79 // Finds all clusters for a given digits list provided not empty. Currently digits list is a list of all digits for a single chamber.
80 // Puts all found clusters in separate lists, one per clusters.
81 // Arguments: pDigAll - list of digits for all chambers
82 // pCluAll - list of clusters for all chambers
83 // isTryUnfold - flag to choose between CoG and Mathieson fitting
85 TMatrixF padMap(AliHMPIDParam::kMinPx,AliHMPIDParam::kMaxPcx,AliHMPIDParam::kMinPy,AliHMPIDParam::kMaxPcy); //pads map for single chamber 0..159 x 0..143
87 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){ //chambers loop
88 TClonesArray *pDigCur=(TClonesArray*)pDigAll->At(iCh); //get list of digits for current chamber
89 if(pDigCur->GetEntriesFast()==0) continue; //no digits for current chamber
91 padMap=(Float_t)-1; //reset map to -1 (means no digit for this pad)
92 TClonesArray *pCluCur=(TClonesArray*)pCluAll->At(iCh); //get list of clusters for current chamber
94 for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop to fill pads map
95 AliHMPIDDigit *pDig= (AliHMPIDDigit*)pDigCur->At(iDig); //get current digit
96 padMap( pDig->PadChX(), pDig->PadChY() )=iDig; //fill the map, (padx,pady) cell takes digit index
97 }//digits loop to fill digits map
99 AliHMPIDCluster clu; //tmp cluster to be used as current
100 for(Int_t iDig=0;iDig<pDigCur->GetEntriesFast();iDig++){ //digits loop for current chamber
101 AliHMPIDDigit *pDig=(AliHMPIDDigit*)pDigCur->At(iDig); //take current digit
102 if(!(pDig=UseDig(pDig->PadChX(),pDig->PadChY(),pDigCur,&padMap))) continue; //this digit is already taken in FormClu(), go after next digit
103 FormClu(&clu,pDig,pDigCur,&padMap); //form cluster starting from this digit by recursion
105 clu.Solve(pCluCur,isTryUnfold); //solve this cluster and add all unfolded clusters to provided list
106 clu.Reset(); //empty current cluster
107 }//digits loop for current chamber
110 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
111 void AliHMPIDReconstructor::FormClu(AliHMPIDCluster *pClu,AliHMPIDDigit *pDig,TClonesArray *pDigLst,TMatrixF *pDigMap)
113 // Forms the initial cluster as a combination of all adjascent digits. Starts from the given digit then calls itself recursevly for all neighbours.
114 // Arguments: pClu - pointer to cluster being formed
116 pClu->DigAdd(pDig);//take this digit in cluster
118 Int_t cnt=0,cx[4],cy[4];
120 if(pDig->PadPcX() != AliHMPIDParam::kMinPx){cx[cnt]=pDig->PadChX()-1; cy[cnt]=pDig->PadChY() ;cnt++;} //left
121 if(pDig->PadPcX() != AliHMPIDParam::kMaxPx){cx[cnt]=pDig->PadChX()+1; cy[cnt]=pDig->PadChY() ;cnt++;} //right
122 if(pDig->PadPcY() != AliHMPIDParam::kMinPy){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()-1;cnt++;} //down
123 if(pDig->PadPcY() != AliHMPIDParam::kMaxPy){cx[cnt]=pDig->PadChX() ; cy[cnt]=pDig->PadChY()+1;cnt++;} //up
125 for (Int_t i=0;i<cnt;i++){//neighbours loop
126 if((pDig=UseDig(cx[i],cy[i],pDigLst,pDigMap))) FormClu(pClu,pDig,pDigLst,pDigMap); //check if this neighbour pad fired and mark it as taken
129 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
130 void AliHMPIDReconstructor::Reconstruct(TTree *pDigTree,TTree *pCluTree)const
132 //Invoked by AliReconstruction to convert digits to clusters i.e. reconstruct simulated data
133 //Arguments: pDigTree - pointer to Digit tree
134 // pCluTree - poitner to Cluster tree
136 AliDebug(1,"Start.");
137 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++) {
138 pCluTree->Branch(Form("HMPID%d",iCh),&((*fClu)[iCh]),4000,0);
139 pDigTree->SetBranchAddress(Form("HMPID%d",iCh),&((*fDig)[iCh]));
141 pDigTree->GetEntry(0);
142 Dig2Clu(fDig,fClu); //cluster finder
143 pCluTree->Fill(); //fill tree for current event
145 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++){
146 fDig->At(iCh)->Clear();
147 fClu->At(iCh)->Clear();
151 }//Reconstruct(for simulated digits)
152 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
153 void AliHMPIDReconstructor::ConvertDigits(AliRawReader *pRR,TTree *pDigTree)const
155 //Invoked by AliReconstruction to convert raw digits from DDL files to digits
156 //Arguments: pRR - ALICE raw reader pointer
157 // pDigTree - pointer to Digit tree
159 AliDebug(1,"Start.");
163 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++) {
164 pDigTree->Branch(Form("HMPID%d",iCh),&((*fDig)[iCh]),4000,0);
167 AliHMPIDRawStream stream(pRR);
171 UInt_t ddl=stream.GetDDLNumber(); //returns 0,1,2 ... 13
172 if((UInt_t)(2*iCh)==ddl || (UInt_t)(2*iCh+1)==ddl) {
173 for(Int_t row = 1; row <= AliHMPIDRawStream::kNRows; row++){
174 for(Int_t dil = 1; dil <= AliHMPIDRawStream::kNDILOGICAdd; dil++){
175 for(Int_t pad = 0; pad < AliHMPIDRawStream::kNPadAdd; pad++){
176 if(stream.GetCharge(ddl,row,dil,pad) < 1) continue;
177 AliHMPIDDigit dig(stream.GetPad(ddl,row,dil,pad),stream.GetCharge(ddl,row,dil,pad));
178 if(!IsDigSurvive(&dig)) continue;
179 new((*((TClonesArray*)fDig->At(iCh)))[iDigCnt++]) AliHMPIDDigit(dig); //add this digit to the tmp list
189 for(Int_t iCh=AliHMPIDParam::kMinCh;iCh<=AliHMPIDParam::kMaxCh;iCh++)fDig->At(iCh)->Clear();
192 }//Reconstruct digits from raw digits
193 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
194 void AliHMPIDReconstructor::FillESD(TTree */*digitsTree*/, TTree */*clustersTree*/, AliESDEvent *pESD) const
196 // Calculates probability to be a electron-muon-pion-kaon-proton
197 // from the given Cerenkov angle and momentum assuming no initial particle composition
198 // (i.e. apriory probability to be the particle of the given sort is the same for all sorts)
201 Double_t pid[AliPID::kSPECIES],h[AliPID::kSPECIES];
203 for(Int_t iTrk=0;iTrk<pESD->GetNumberOfTracks();iTrk++){//ESD tracks loop
204 AliESDtrack *pTrk = pESD->GetTrack(iTrk);// get next reconstructed track
205 if(pTrk->GetHMPIDsignal()<=0){//HMPID does not find anything reasonable for this track, assign 0.2 for all species
206 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++) pid[iPart]=1.0/AliPID::kSPECIES;
207 pTrk->SetHMPIDpid(pid);
210 Double_t pmod = pTrk->GetP();
212 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++){
213 Double_t mass = AliPID::ParticleMass(iPart);
214 Double_t cosThetaTh = TMath::Sqrt(mass*mass+pmod*pmod)/(AliHMPIDParam::Instance()->MeanIdxRad()*pmod);
215 if(cosThetaTh<1) //calculate the height of theoretical theta ckov on the gaus of experimental one
216 h[iPart] =TMath::Gaus(TMath::ACos(cosThetaTh),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);
217 else //beta < 1/ref. idx. => no light at all
219 hTot +=h[iPart]; //total height of all theoretical heights for normalization
222 Double_t hMin=TMath::Gaus(pTrk->GetHMPIDsignal()-4*TMath::Sqrt(pTrk->GetHMPIDchi2()),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);//5 sigma protection
224 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++)//species loop to assign probabilities
226 pid[iPart]=h[iPart]/hTot;
227 else //all theoretical values are far away from experemental one
228 pid[iPart]=1.0/AliPID::kSPECIES;
229 pTrk->SetHMPIDpid(pid);