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[u/mrichter/AliRoot.git] / HMPID / AliHMPIDReconstructor.cxx
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d3da6dc4 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16#include "AliHMPIDReconstructor.h" //class header
17#include "AliHMPID.h" //Reconstruct()
18#include "AliHMPIDCluster.h" //CluQA()
19#include "AliHMPIDParam.h" //FillEsd()
20#include <AliESD.h> //FillEsd()
21#include <AliRunLoader.h> //Reconstruct() for simulated digits
22#include <AliRawReader.h> //Reconstruct() for raw digits
23#include <AliRun.h> //Reconstruct()
24#include <TH1F.h> //CluQA()
25#include <TH2F.h> //CluQA()
26#include <TCanvas.h> //CluQA()
27#include <TNtupleD.h> //CheckPR()
28ClassImp(AliHMPIDReconstructor)
29
30//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
31void AliHMPIDReconstructor::CluQA(AliRunLoader *pAL)
32{
33// Quality assesment plots for clusters.
34// This methode takes list of digits and form list of clusters again in order to
35// calculate cluster shape and cluster particle mixture
36 AliLoader *pRL=pAL->GetDetectorLoader("HMPID"); AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
37 Int_t iNevt=pAL->GetNumberOfEvents(); if(iNevt==0) {AliInfoClass("No events");return;}
38 if(pRL->LoadDigits()) {AliInfoClass("No digits file");return;}
39 pAL->LoadHeader();
40 pAL->LoadKinematics();
41// AliStack *pStack=pAL->Stack();
42 TH1::AddDirectory(kFALSE);
43
44
45 TH1F* pQ=new TH1F("RiAllQ" ,"Charge All" ,4000 ,0 ,4000);// Q hists
46 TH1F* pCerQ=new TH1F("RiCerQ" ,"Charge Ckov" ,4000 ,0 ,4000);
47 TH1F* pMipQ=new TH1F("RiMipQ" ,"Charge MIP" ,4000 ,0 ,4000);
48
49 TH1F* pS=new TH1F("RichCluSize" ,"Cluster size;size" ,100 ,0 ,100 );// size hists
50 TH1F* pCerS=new TH1F("RichCluCerSize" ,"Ckov size;size" ,100 ,0 ,100 );
51 TH1F* pMipS=new TH1F("RichCluMipSize" ,"MIP size;size" ,100 ,0 ,100 );
52
53 TH2F* pM=new TH2F("RichCluMap" ,"Cluster map;x [cm];y [cm]" ,1000 ,0 ,AliHMPIDDigit::SizePcX(),1000,0,AliHMPIDDigit::SizePcY()); // maps
54 TH2F* pMipM=new TH2F("RichCluMipMap" ,"MIP map;x [cm];y [cm]" ,1000 ,0 ,AliHMPIDDigit::SizePcX(),1000,0,AliHMPIDDigit::SizePcY());
55 TH2F* pCerM=new TH2F("RichCluCerMap" ,"Ckov map;x [cm];y [cm]" ,1000 ,0 ,AliHMPIDDigit::SizePcX(),1000,0,AliHMPIDDigit::SizePcY());
56
57
58
59 for(Int_t iEvt=0;iEvt<iNevt;iEvt++){
60 pAL->GetEvent(iEvt);
61 pRL->TreeD()->GetEntry(0);
62 TClonesArray *pCluLst=new TClonesArray("AliHMPIDCluster");//tmp list of clusters for this event
63
64 for(Int_t iCh=0;iCh<7;iCh++) Dig2Clu(pRich->DigLst(iCh),pCluLst,kFALSE);//cluster finder for all chamber if any digits present
65
66 for(Int_t iClu=0;iClu<pCluLst->GetEntriesFast();iClu++){
67 AliHMPIDCluster *pClu = (AliHMPIDCluster*)pCluLst->At(iClu);
68 Int_t cfm=0; for(Int_t iDig=0;iDig<pClu->Size();iDig++) cfm+=pClu->Dig(iDig)->Ch(); //collect ckov-fee-mip structure of current cluster ?????
69 Int_t iNckov=cfm/1000000; Int_t iNfee =cfm%1000000/1000; Int_t iNmip =cfm%1000000%1000;
70
71 pQ ->Fill(pClu->Q()) ; pS ->Fill(pClu->Size()) ; pM ->Fill(pClu->X(),pClu->Y()); //all clusters
72 if(iNckov!=0 && iNfee==0 && iNmip==0) {pCerQ->Fill(pClu->Q()) ; pCerS->Fill(pClu->Size()) ; pCerM ->Fill(pClu->X(),pClu->Y());}//ckov only cluster
73 if(iNckov==0 && iNfee==0 && iNmip!=0) {pMipQ->Fill(pClu->Q()) ; pMipS->Fill(pClu->Size()) ; pMipM ->Fill(pClu->X(),pClu->Y());}//mip only cluster
74
75 }//clusters loop
76 pCluLst->Clear();delete pCluLst;
77 }//events loop
78
79 pRL->UnloadDigits(); pAL->UnloadKinematics(); pAL->UnloadHeader();
80 TCanvas *pC=new TCanvas("RichCluQA",Form("QA for cluster from %i events",iNevt),1000,900); pC->Divide(3,3);
81 pC->cd(1); pM->Draw(); pC->cd(2); pQ->Draw(); pC->cd(3); pS->Draw();
82 pC->cd(4); pMipM->Draw(); pC->cd(5); pMipQ->Draw(); pC->cd(6); pMipS->Draw();
83 pC->cd(7); pCerM->Draw(); pC->cd(8); pCerQ->Draw(); pC->cd(9); pCerS->Draw();
84}//CluQA()
85//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
86void AliHMPIDReconstructor::Dig2Clu(TClonesArray *pDigLst,TClonesArray *pCluLst,Bool_t isTryUnfold)
87{
88// Finds all clusters for a given digits list provided not empty. Currently digits list is a list of all digits for a single chamber.
89// Puts all found clusters in separate lists, one per clusters.
90// Arguments: pDigLst - list of digits provided not empty
91// pCluLst - list of clusters, provided empty
92// isTryUnfold - flag to choose between CoG and Mathieson fitting
93// Returns: none
94 TMatrixF digMap(AliHMPIDDigit::kPadAllX,AliHMPIDDigit::kPadAllY); digMap=(Float_t)-1; //digit map for single chamber reseted to -1
95 for(Int_t iDig=0;iDig<pDigLst->GetEntriesFast();iDig++){ //digits loop to fill digits map
96 AliHMPIDDigit *pDig= (AliHMPIDDigit*)pDigLst->At(iDig); //get current digit
97 digMap( pDig->PadX(), pDig->PadY() )=iDig; //fill the map, (padx,pady) cell takes digit index
98 } //digits loop to fill digits map
99
100 AliHMPIDCluster clu; //tmp cluster to be used as current
101
102 for(Int_t iDig=0;iDig<pDigLst->GetEntriesFast();iDig++){ //digits loop to form clusters list
103 AliHMPIDDigit *pDig=(AliHMPIDDigit*)pDigLst->At(iDig); //take current digit
104 if(!(pDig=UseDig(pDig->PadX(),pDig->PadY(),pDigLst,&digMap))) continue; //this digit is already taken in FormClu(), go after next digit
105 FormClu(&clu,pDig,pDigLst,&digMap); //form cluster starting from this digit by recursion
106 clu.Solve(pCluLst,isTryUnfold); //solve this cluster and add all unfolded clusters to provided list
107 clu.Reset(); //empty current cluster
108 } //digits loop to form clusters list
109}//Dig2Clu()
110//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
111void AliHMPIDReconstructor::FormClu(AliHMPIDCluster *pClu,AliHMPIDDigit *pDig,TClonesArray *pDigLst,TMatrixF *pDigMap)
112{
113// Forms the initial cluster as a sum of all adjascent digits. Starts from the given digit
114// then calls itself recursevly for all neighbours.
115// Arguments: pClu - pointer to cluster being formed
116// Returns: none
117 pClu->DigAdd(pDig);//take this digit in cluster
118
119 Int_t x[4],y[4];
120
121
122 Int_t iPadCnt=0; Int_t iPadX=pDig->PadX(); Int_t iPadY=pDig->PadY();
123 if(iPadX != AliHMPIDDigit::kPad1) {x[iPadCnt]=iPadX-1; y[iPadCnt]=iPadY; iPadCnt++;} //left
124 if(iPadX != AliHMPIDDigit::kPadPcX) {x[iPadCnt]=iPadX+1; y[iPadCnt]=iPadY; iPadCnt++;} //right
125 if(iPadY != AliHMPIDDigit::kPad1) {x[iPadCnt]=iPadX; y[iPadCnt]=iPadY-1; iPadCnt++;} //down
126 if(iPadY != AliHMPIDDigit::kPadPcY) {x[iPadCnt]=iPadX; y[iPadCnt]=iPadY+1; iPadCnt++;} //up
127
128 for (Int_t i=0;i<iPadCnt;i++)
129 if((pDig=UseDig(x[i],y[i],pDigLst,pDigMap))) FormClu(pClu,pDig,pDigLst,pDigMap); //check if this neighbour hit and mark it as taken
130}//FormClu()
131//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
132void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL)const
133{
134//Invoked by AliReconstruction to convert digits to clusters i.e. reconstruct simulated data
135//Arguments: pAL - ALICE run loader pointer
136// Returns: none
137 AliDebug(1,"Start.");
138 AliLoader *pRL=pAL->GetDetectorLoader("HMPID");
139 AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
140 pRL->LoadDigits();
141 pRL->LoadRecPoints("recreate");
142
143 for(Int_t iEvtN=0;iEvtN<pAL->GetNumberOfEvents();iEvtN++){//events loop
144 pAL->GetEvent(iEvtN); AliDebug(1,Form("Processing event %i...",iEvtN)); //switch current directory to next event
145 pRL->TreeD()->GetEntry(0); pRL->MakeTree("R"); pRich->MakeBranch("R"); //load digits to memory and create branches for clusters
146
147 for(Int_t iCh=0;iCh<7;iCh++) Dig2Clu(pRich->DigLst(iCh),pRich->CluLst(iCh));//cluster finder
148
149 pRL->TreeR()->Fill(); //fill tree for current event
150 pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
151 pRich->DigReset(); pRich->CluReset();
152 }//events loop
153
154 pRL->UnloadDigits();
155 pRL->UnloadRecPoints();
156
157 AliDebug(1,"Stop.");
158}//Reconstruct(for simulated digits)
159//__________________________________________________________________________________________________
160void AliHMPIDReconstructor::Reconstruct(AliRunLoader *pAL,AliRawReader* pRR)const
161{
162//Invoked by AliReconstruction to convert raw digits from DDL files to clusters
163//Arguments: pAL - ALICE run loader pointer
164// pRR - ALICE raw reader pointer
165// Returns: none
166 AliLoader *pRL=pAL->GetDetectorLoader("HMPID"); AliHMPID *pRich=(AliHMPID*)pAL->GetAliRun()->GetDetector("HMPID");//get pointers for HMPID and HMPID loader
167
168 AliHMPIDDigit dig; //tmp digit, raw digit will be converted to it
169
170 Int_t iEvtN=0;
171 while(pRR->NextEvent()){//events loop
172 pAL->GetEvent(iEvtN++);
173 pRL->MakeTree("R"); pRich->MakeBranch("R");
174
175 for(Int_t iCh=0;iCh<7;iCh++){//chambers loop
176 TClonesArray *pDigLst=new TClonesArray("AliHMPIDDigit"); Int_t iDigCnt=0; //tmp list of digits for single chamber
177 pRR->Select("HMPID",2*iCh,2*iCh+1);//select only DDL files for the current chamber
178 UInt_t w32=0;
179 while(pRR->ReadNextInt(w32)){//raw records loop (in selected DDL files)
180 UInt_t ddl=pRR->GetDDLID(); //returns 0,1,2 ... 13
181 dig.ReadRaw(ddl,w32);
182 AliDebug(1,Form("Ch=%i DDL=%i raw=0x%x digit=(%3i,%3i,%3i,%3i) Q=%5.2f",iCh,ddl,w32,dig.Ch(),dig.Pc(),dig.PadX(),dig.PadY(),dig.Q()));
183 new((*pDigLst)[iDigCnt++]) AliHMPIDDigit(dig); //add this digit to the tmp list
184 }//raw records loop
185 if(iDigCnt) Dig2Clu(pDigLst,pRich->CluLst(iCh));//cluster finder for the current chamber if any digits present
186 pRR->Reset();
187 pDigLst->Delete(); iDigCnt=0;//clean up list of digits for the current chamber
188 }//chambers loop
189 pRL->TreeR()->Fill(); //fill tree for current event
190 pRL->WriteRecPoints("OVERWRITE");//write out clusters for current event
191 pRich->CluReset();
192 }//events loop
193 pRL->UnloadRecPoints();
194}//Reconstruct raw data
195//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
196
197void AliHMPIDReconstructor::FillESD(AliRunLoader *, AliESD *pESD) const
198{
199// Calculates probability to be a electron-muon-pion-kaon-proton
200// from the given Cerenkov angle and momentum assuming no initial particle composition
201// (i.e. apriory probability to be the particle of the given sort is the same for all sorts)
202
203 AliPID ppp; //needed
204 Double_t pid[AliPID::kSPECIES],h[AliPID::kSPECIES];
205
206 for(Int_t iTrk=0;iTrk<pESD->GetNumberOfTracks();iTrk++){//ESD tracks loop
207 AliESDtrack *pTrk = pESD->GetTrack(iTrk);// get next reconstructed track
208 if(pTrk->GetHMPIDsignal()<=0){//HMPID does not find anything reasonable for this track, assign 0.2 for all species
209 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++) pid[iPart]=1.0/AliPID::kSPECIES;
210 pTrk->SetHMPIDpid(pid);
211 continue;
212 }
213 Double_t pmod = pTrk->GetP();
214 Double_t hTot=0;
215 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++){
216 Double_t mass = AliPID::ParticleMass(iPart);
217 Double_t cosThetaTh = TMath::Sqrt(mass*mass+pmod*pmod)/(AliHMPIDParam::Instance()->MeanIdxRad()*pmod);
218 if(cosThetaTh<1) //calculate the height of theortical theta ckov on the gaus of experimental one
219 h[iPart] =TMath::Gaus(TMath::ACos(cosThetaTh),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);
220
221 else //beta < 1/ref. idx. => no light at all
222 h[iPart] =0 ;
223 hTot +=h[iPart]; //total height of all theoretical heights for normalization
224 }//species loop
225
226 Double_t hMin=TMath::Gaus(pTrk->GetHMPIDsignal()-4*TMath::Sqrt(pTrk->GetHMPIDchi2()),pTrk->GetHMPIDsignal(),TMath::Sqrt(pTrk->GetHMPIDchi2()),kTRUE);//5 sigma protection
227
228 for(Int_t iPart=0;iPart<AliPID::kSPECIES;iPart++)//species loop to assign probabilities
229 if(hTot>hMin)
230 pid[iPart]=h[iPart]/hTot;
231 else //all theoretical values are far away from experemental one
232 pid[iPart]=1.0/AliPID::kSPECIES;
233 pTrk->SetHMPIDpid(pid);
234 }//ESD tracks loop
235 //last line is to check if the nearest thetacerenkov to the teorethical one is within 5 sigma, otherwise no response (equal prob to every particle
236}//FillESD
237//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++