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"
20 #include <TGeoManager.h>
24 #include "AliHeader.h"
27 #include "AliMagFMaps.h"
28 #include "AliTracker.h"
31 #include "AliMUONConstants.h"
32 #include "AliMUONTrack.h"
33 #include "AliMUONRecoCheck.h"
34 #include "AliMUONTrackParam.h"
35 #include "AliMUONTrackExtrap.h"
36 #include "AliMUONVTrackStore.h"
38 Int_t TrackCheck( Bool_t *compTrack);
40 void MUONRecoCheck (Int_t nEvent = 1, char* geoFilename = "geometry.root",
41 char * pathSim="./generated/", char * esdFileName="AliESDs.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.
48 Bool_t compTrackOK[10];
52 AliMUONTrack* trackOK(0x0);
54 Double_t sigmaCut = 4.; // 4 sigmas cut
55 Double_t maxChi2 = 999.;
56 AliMUONTrackParam *trackParam;
57 Double_t x1,y1,z1,pX1,pY1,pZ1,p1;
58 Double_t x2,y2,z2,pX2,pY2,pZ2,p2;
60 // File for histograms and histogram booking
61 TFile *histoFile = new TFile("MUONRecoCheck.root", "RECREATE");
63 TH1F *hReconstructible = new TH1F("hReconstructible"," Nb of reconstructible tracks ",15,-0.5,14.5);
64 TH1F *hReco = new TH1F("hReco"," Nb of reconstructed tracks / evt",15,-0.5,14.5);
65 TH1F *hNClusterComp = new TH1F("hNClusterComp"," Nb of compatible clusters / track ",15,-0.5,14.5);
66 TH1F *hTestTrack = new TH1F("hTestTrack"," Reconstruction requirement / track",15,-0.5,14.5);
67 TH1F *hTrackRefID = new TH1F("hTrackRefID"," track reference ID ",100,-0.5,99.5);
69 TH1F *hResMomVertex = new TH1F("hResMomVertex"," delta P vertex (GeV/c)",100,-10.,10);
70 TH1F *hResMomFirstCluster = new TH1F("hResMomFirstCluster"," delta P first cluster (GeV/c)",100,-10.,10);
72 // Import TGeo geometry (needed by AliMUONTrackExtrap::ExtrapToVertex)
74 TGeoManager::Import(geoFilename);
76 Error("MUONmass_ESD", "getting geometry from file %s failed", geoFilename);
82 // waiting for mag field in CDB
83 printf("Loading field map...\n");
84 AliMagFMaps* field = new AliMagFMaps("Maps","Maps", 1, 1., 10., AliMagFMaps::k5kG);
85 AliTracker::SetFieldMap(field, kFALSE);
86 // set the magnetic field for track extrapolations
87 AliMUONTrackExtrap::SetField(AliTracker::GetFieldMap());
89 AliMUONRecoCheck rc(esdFileName, pathSim);
91 Int_t nevents = rc.NumberOfEvents();
93 if (nevents < nEvent) nEvent = nevents;
96 Int_t nReconstructibleTracks = 0;
97 Int_t nReconstructedTracks = 0;
98 Int_t nReconstructibleTracksCheck = 0;
100 for (ievent=0; ievent<nEvent; ievent++)
102 if (!(ievent%10)) printf(" **** event # %d \n",ievent);
104 AliMUONVTrackStore* trackStore = rc.ReconstructedTracks(ievent);
105 AliMUONVTrackStore* trackRefStore = rc.ReconstructibleTracks(ievent);
107 hReconstructible->Fill(trackRefStore->GetSize());
108 hReco->Fill(trackStore->GetSize());
110 nReconstructibleTracks += trackRefStore->GetSize();
111 nReconstructedTracks += trackStore->GetSize();
113 TIter next(trackRefStore->CreateIterator());
114 AliMUONTrack* trackRef;
116 while ( ( trackRef = static_cast<AliMUONTrack*>(next()) ) )
121 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
123 compTrackOK[ch] = kFALSE;
126 TIter next2(trackStore->CreateIterator());
127 AliMUONTrack* trackReco;
129 while ( ( trackReco = static_cast<AliMUONTrack*>(next2()) ) )
131 // check if trackRef is compatible with trackReco
132 if (trackReco->GetNClusters() > 1) {
134 // check cluster by cluster if trackReco contain info at each cluster
135 compTrack = trackRef->CompatibleTrack(trackReco,sigmaCut);
137 iTrack = TrackCheck(compTrack);
139 if (iTrack > testTrack)
142 for (Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ch++)
144 if (compTrack[ch]) nClusterOk++;
145 compTrackOK[ch] = compTrack[ch];
153 // check only parameters at the z position of the first trackRef
154 AliMUONTrackParam *refParam = (AliMUONTrackParam*) trackRef->GetTrackParamAtCluster()->First();
155 AliMUONTrackParam recoParam(*((AliMUONTrackParam*) trackReco->GetTrackParamAtCluster()->First()));
156 AliMUONTrackExtrap::ExtrapToZCov(&recoParam, refParam->GetZ());
158 if (refParam->CompatibleTrackParam(recoParam, sigmaCut, chi2)) {
160 if (chi2 < maxChi2) {
171 hTestTrack->Fill(testTrack);
172 trackID = trackRef->GetTrackID();
173 hTrackRefID->Fill(trackID);
175 if (testTrack == 4 || maxChi2 < 5.*sigmaCut*sigmaCut) { // tracking requirements verified, track is found
176 nReconstructibleTracksCheck++;
177 hNClusterComp->Fill(nClusterOk);
178 trackParam = trackRef->GetTrackParamAtVertex();
179 x1 = trackParam->GetNonBendingCoor();
180 y1 = trackParam->GetBendingCoor();
181 z1 = trackParam->GetZ();
182 pX1 = trackParam->Px();
183 pY1 = trackParam->Py();
184 pZ1 = trackParam->Pz();
185 p1 = trackParam->P();
187 // 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);
189 trackParam = new AliMUONTrackParam(*((AliMUONTrackParam*)(trackReco->GetTrackParamAtCluster()->First())));
190 AliMUONTrackExtrap::ExtrapToVertex(trackParam,x1,y1,z1,0.,0.);
191 x2 = trackParam->GetNonBendingCoor();
192 y2 = trackParam->GetBendingCoor();
193 z2 = trackParam->GetZ();
194 pX2 = trackParam->Px();
195 pY2 = trackParam->Py();
196 pZ2 = trackParam->Pz();
197 p2 = trackParam->P();
199 // 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);
201 hResMomVertex->Fill(p2-p1);
203 trackParam = (AliMUONTrackParam*) trackRef->GetTrackParamAtCluster()->First();
204 x1 = trackParam->GetNonBendingCoor();
205 y1 = trackParam->GetBendingCoor();
206 z1 = trackParam->GetZ();
207 pX1 = trackParam->Px();
208 pY1 = trackParam->Py();
209 pZ1 = trackParam->Pz();
210 p1 = trackParam->P();
211 // printf(" Ref. track at 1st cluster: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x1,y1,z1,pX1,pY1,pZ1);
212 trackParam = (AliMUONTrackParam*) trackOK->GetTrackParamAtCluster()->First();
213 x2 = trackParam->GetNonBendingCoor();
214 y2 = trackParam->GetBendingCoor();
215 z2 = trackParam->GetZ();
216 pX2 = trackParam->Px();
217 pY2 = trackParam->Py();
218 pZ2 = trackParam->Pz();
219 p2 = trackParam->P();
220 // printf(" Reconst. track at 1st cluster: x,y,z: %f %f %f px,py,pz: %f %f %f \n",x2,y2,z2,pX2,pY2,pZ2);
222 hResMomFirstCluster->Fill(p2-p1);
225 } // end loop track ref.
227 } // end loop on event
229 printf(" nb of reconstructible tracks: %d \n", nReconstructibleTracks);
230 printf(" nb of reconstructed tracks: %d \n", nReconstructedTracks);
231 printf(" nb of reconstructible tracks which are reconstructed: %d \n", nReconstructibleTracksCheck);
238 Int_t TrackCheck( Bool_t *compTrack)
240 // Apply reconstruction requirements
241 // Return number of validated conditions
242 // If all the tests are verified then TrackCheck = 4 (good track)
244 Int_t nCompClustersInLastStations = 0;
246 // apply reconstruction requirements
247 if (compTrack[0] || compTrack[1]) iTrack++; // at least one compatible cluster in st. 0
248 if (compTrack[2] || compTrack[3]) iTrack++; // at least one compatible cluster in st. 1
249 if (compTrack[4] || compTrack[5]) iTrack++; // at least one compatible cluster in st. 2
250 for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++) {
251 if (compTrack[ch]) nCompClustersInLastStations++;
253 if (nCompClustersInLastStations > 2) iTrack++; // at least 3 compatible clusters in st. 3 & 4