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 **************************************************************************/
17 #include "TClonesArray.h"
19 #include "TParticle.h"
24 #include "AliHeader.h"
27 #include "AliRunLoader.h"
28 #include "AliMagFMaps.h"
32 #include "AliMUONConstants.h"
33 #include "AliMUONTrack.h"
34 #include "AliMUONRecoCheck.h"
35 #include "AliMUONTrackParam.h"
36 #include "AliMUONTrackExtrap.h"
37 #include "AliTracker.h"
39 Int_t TrackCheck( Bool_t *compTrack);
41 void MUONRecoCheck (Int_t nEvent = 1, char * filename="galice.root"){
43 // Utility macro to check the muon reconstruction. Reconstructed tracks are compared
44 // to reference tracks. The reference tracks are built from AliTrackReference for the
45 // hit in chamber (0..9) and from kinematics (TreeK) for the vertex parameters.
47 Int_t nTrackReco, nTrackRef;
48 AliMUONTrack *trackReco, *trackRef;
50 Bool_t compTrackOK[10];
56 Double_t sigma2Cut = 16; // 4 sigmas cut, sigma2Cut = 4*4
57 AliMUONTrackParam *trackParam;
58 TClonesArray *trackParamAtHit;
59 Double_t x1,y1,z1,pX1,pY1,pZ1,p1;
60 Double_t x2,y2,z2,pX2,pY2,pZ2,p2;
61 TParticle* particle = new TParticle();
63 TClonesArray *trackRecoArray = NULL;
64 TClonesArray *trackRefArray = NULL;
67 // File for histograms and histogram booking
68 TFile *histoFile = new TFile("MUONRecoCheck.root", "RECREATE");
70 TH1F *hReconstructible = new TH1F("hReconstructible"," Nb of reconstructible tracks ",15,-0.5,14.5);
71 TH1F *hReco = new TH1F("hReco"," Nb of reconstructed tracks / evt",15,-0.5,14.5);
72 TH1F *hNHitComp = new TH1F("hNHitComp"," Nb of compatible hits / track ",15,-0.5,14.5);
73 TH1F *hTestTrack = new TH1F("hTestTrack"," Reconstruction requirement / track",15,-0.5,14.5);
74 TH1F *hTrackRefID = new TH1F("hTrackRefID"," track reference ID ",100,-0.5,99.5);
76 TH1F *hResMomVertex = new TH1F("hMomVertex"," delta P vertex (GeV/c)",100,-10.,10);
77 TH1F *hResMomFirstHit = new TH1F("hMomFirstHit"," delta P first hit (GeV/c)",100,-10.,10);
80 // waiting for mag field in CDB
81 printf("Loading field map...\n");
82 AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
83 AliTracker::SetFieldMap(field, kFALSE);
85 AliRunLoader* runLoader = AliRunLoader::Open(filename,"read");
86 AliLoader * MUONLoader = runLoader->GetLoader("MUONLoader");
87 AliMUONData * MUONData = new AliMUONData(MUONLoader,"MUON","MUON");
89 runLoader->LoadKinematics("READ");
90 runLoader->LoadTrackRefs("READ");
91 MUONLoader->LoadTracks("READ");
93 AliMUONRecoCheck rc(runLoader,MUONData);
95 Int_t nevents = runLoader->GetNumberOfEvents();
97 if (nevents < nEvent) nEvent = nevents;
100 Int_t nReconstructibleTracks = 0;
101 Int_t nReconstructedTracks = 0;
102 Int_t nReconstructibleTracksCheck = 0;
104 for (ievent=0; ievent<nEvent; ievent++) {
105 if (!(ievent%10)) printf(" **** event # %d \n",ievent);
106 runLoader->GetEvent(ievent);
108 rc.MakeTrackRef(); // make reconstructible tracks
112 trackRecoArray = rc.GetTrackReco();
113 trackRefArray = rc.GetMuonTrackRef();
115 nTrackRef = trackRefArray->GetEntriesFast();
116 nTrackReco = trackRecoArray->GetEntriesFast();
118 hReconstructible->Fill(rc.GetNumberOfReconstuctibleTracks());
119 hReco->Fill(rc.GetNumberOfRecoTracks());
121 nReconstructibleTracks += rc.GetNumberOfReconstuctibleTracks();
122 nReconstructedTracks += rc.GetNumberOfRecoTracks();
124 for (Int_t index1 = 0; index1 < nTrackRef; index1++) {
125 trackRef = (AliMUONTrack *)trackRefArray->At(index1);
129 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
130 compTrackOK[ch] = kFALSE;
131 for (Int_t index2 = 0; index2 < nTrackReco; index2++) {
132 trackReco = (AliMUONTrack *)trackRecoArray->At(index2);
134 // check if trackRef is compatible with trackReco
135 compTrack = trackRef->CompatibleTrack(trackReco,sigma2Cut);
137 iTrack = TrackCheck(compTrack);
139 if (iTrack > testTrack) {
141 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++) {
142 if (compTrack[ch]) nHitOK++;
143 compTrackOK[ch] = compTrack[ch];
150 hTestTrack->Fill(testTrack);
151 trackID = trackRef->GetTrackID();
152 hTrackRefID->Fill(trackID);
154 if (testTrack == 4) { // tracking requirements verified, track is found
155 nReconstructibleTracksCheck++;
156 hNHitComp->Fill(nHitOK);
157 particle = runLoader->GetHeader()->Stack()->Particle(trackID);
158 // printf(" trackID: %d , PDG code: %d \n",trackID,particle->GetPdgCode());
159 trackParam = trackRef->GetTrackParamAtVertex();
160 x1 = trackParam->GetNonBendingCoor();
161 y1 = trackParam->GetBendingCoor();
162 z1 = trackParam->GetZ();
163 pX1 = trackParam->Px();
164 pY1 = trackParam->Py();
165 pZ1 = trackParam->Pz();
166 p1 = trackParam->P();
168 // printf(" Ref. track at vertex: x,y,z: %f %f %f px,py,pz,p: %f %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1,p1);
169 trackReco = (AliMUONTrack *)trackRecoArray->At(indexOK);
170 trackParam = new AliMUONTrackParam(*((AliMUONTrackParam*)(trackReco->GetTrackParamAtHit()->First())));
171 AliMUONTrackExtrap::ExtrapToVertex(trackParam,x1,y1,z1);
172 x2 = trackParam->GetNonBendingCoor();
173 y2 = trackParam->GetBendingCoor();
174 z2 = trackParam->GetZ();
175 pX2 = trackParam->Px();
176 pY2 = trackParam->Py();
177 pZ2 = trackParam->Pz();
178 p2 = trackParam->P();
180 // printf(" Reconst. track at vertex: x,y,z: %f %f %f px,py,pz: %f %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2,p2);
182 hResMomVertex->Fill(p2-p1);
184 trackParamAtHit = trackRef->GetTrackParamAtHit();
185 trackParam = (AliMUONTrackParam*) trackParamAtHit->First();
186 x1 = trackParam->GetNonBendingCoor();
187 y1 = trackParam->GetBendingCoor();
188 z1 = trackParam->GetZ();
189 pX1 = trackParam->Px();
190 pY1 = trackParam->Py();
191 pZ1 = trackParam->Pz();
192 p1 = trackParam->P();
193 // printf(" Ref. track at 1st hit: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1);
194 trackParamAtHit = ((AliMUONTrack *) trackRecoArray->At(indexOK))->GetTrackParamAtHit();
195 trackParam = (AliMUONTrackParam*) trackParamAtHit->First();
196 x2 = trackParam->GetNonBendingCoor();
197 y2 = trackParam->GetBendingCoor();
198 z2 = trackParam->GetZ();
199 pX2 = trackParam->Px();
200 pY2 = trackParam->Py();
201 pZ2 = trackParam->Pz();
202 p2 = trackParam->P();
203 // printf(" Reconst. track at 1st hit: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2);
205 hResMomFirstHit->Fill(p2-p1);
208 } // end loop track ref.
210 } // end loop on event
212 MUONLoader->UnloadTracks();
213 runLoader->UnloadKinematics();
214 runLoader->UnloadTrackRefs();
218 printf(" nb of reconstructible tracks: %d \n", nReconstructibleTracks);
219 printf(" nb of reconstructed tracks: %d \n", nReconstructedTracks);
220 printf(" nb of reconstructible tracks which are reconstructed: %d \n", nReconstructibleTracksCheck);
227 Int_t TrackCheck( Bool_t *compTrack)
229 // Apply reconstruction requirements
230 // Return number of validated conditions
231 // If all the tests are verified then TrackCheck = 4 (good track)
233 Int_t hitsInLastStations = 0;
235 // apply reconstruction requirements
236 if (compTrack[0] || compTrack[1]) iTrack++; // at least one hit in st. 0
237 if (compTrack[2] || compTrack[3]) iTrack++; // at least one hit in st. 1
238 if (compTrack[4] || compTrack[5]) iTrack++; // at least one hit in st. 2
239 for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++) {
240 if (compTrack[ch]) hitsInLastStations++;
242 if (hitsInLastStations > 2) iTrack++; // at least 3 hits in st. 3 & 4