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Commit | Line | Data |
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1 | Int_t AliTRDanalyzeCluster() | |
2 | { | |
3 | // | |
4 | // Analyzes the cluster | |
5 | // | |
6 | ||
7 | Int_t rc = 0; | |
8 | ||
9 | if (!gAlice) { | |
10 | cout << "<AliTRDanalyzeCluster> No AliRun object found" << endl; | |
11 | rc = 1; | |
12 | return rc; | |
13 | } | |
14 | gAlice->GetEvent(0); | |
15 | ||
16 | // Get the pointer to the TRD detector | |
17 | AliTRD *trd = (AliTRD *) gAlice->GetDetector("TRD"); | |
18 | if (!trd) { | |
19 | cout << "<AliTRDanalyzeCluster> No TRD detector found" << endl; | |
20 | rc = 2; | |
21 | return rc; | |
22 | } | |
23 | ||
24 | // Define the histograms | |
25 | TH1F *hClusAll = new TH1F("hClusAll" ,"Amplitude of the cluster (all)" | |
26 | ,501,-0.5,500.5); | |
27 | TH1F *hClusNoise = new TH1F("hClusNoise","Amplitude of the cluster (noise)" | |
28 | , 5,-0.5, 4.5); | |
29 | TH1F *hClusEl = new TH1F("hClusEl" ,"Amplitude of the cluster (electron)" | |
30 | ,501,-0.5,500.5); | |
31 | TH1F *hClusPi = new TH1F("hClusPi" ,"Amplitude of the cluster (pion)" | |
32 | ,501,-0.5,500.5); | |
33 | ||
34 | // Get the pointer to the geometry object | |
35 | AliTRDgeometry *geo; | |
36 | if (trd) { | |
37 | geo = trd->GetGeometry(); | |
38 | } | |
39 | else { | |
40 | cout << "<AliTRDanalyzeCluster> No TRD geometry found" << endl; | |
41 | rc = 3; | |
42 | return rc; | |
43 | } | |
44 | ||
45 | // Get the pointer to the hit-tree | |
46 | TFile *file = (TFile *) gROOT->GetListOfFiles()->FindObject("TRD_test.root"); | |
47 | TTree *clusterTree = (TTree *) file->Get("TreeR0_TRD"); | |
48 | if (!(clusterTree)) { | |
49 | cout << "<AliTRDanalyzeCluster> No tree with clusters found" << endl; | |
50 | rc = 4; | |
51 | return rc; | |
52 | } | |
53 | ||
54 | // Get the pointer to the hit container | |
55 | TObjArray *clusterArray = trd->RecPoints(); | |
56 | if (!(clusterArray)) { | |
57 | cout << "<AliTRDanalyzeCluster> No clusterArray found" << endl; | |
58 | rc = 5; | |
59 | return rc; | |
60 | } | |
61 | ||
62 | // Set the branch address | |
63 | clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray); | |
64 | Int_t nEntries = clusterTree->GetEntries(); | |
65 | cout << "<AliTRDanalyzeCluster> Number of entries in the cluster tree = " | |
66 | << nEntries | |
67 | << endl; | |
68 | ||
69 | Int_t countCluster = 0; | |
70 | Int_t countOverlap = 0; | |
71 | ||
72 | // Loop through all entries in the tree | |
73 | Int_t nbytes; | |
74 | for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) { | |
75 | ||
76 | // Import the tree | |
77 | nbytes += clusterTree->GetEvent(iEntry); | |
78 | ||
79 | // Get the number of points in the detector | |
80 | Int_t nCluster = clusterArray->GetEntriesFast(); | |
81 | ||
82 | // Loop through all TRD digits | |
83 | for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) { | |
84 | ||
85 | // Get the information for this digit | |
86 | AliTRDcluster *cluster = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster); | |
87 | Int_t detector = cluster->GetDetector(); | |
88 | Int_t sector = geo->GetSector(detector); | |
89 | Int_t plane = geo->GetPlane(detector); | |
90 | Int_t chamber = geo->GetChamber(detector); | |
91 | Float_t energy = cluster->GetQ(); | |
92 | Int_t track0 = cluster->GetTrackIndex(0); | |
93 | Int_t track1 = cluster->GetTrackIndex(1); | |
94 | Int_t track2 = cluster->GetTrackIndex(2); | |
95 | TParticle *particle = 0; | |
96 | if (track0 > -1) { | |
97 | particle = gAlice->Particle(track0); | |
98 | } | |
99 | ||
100 | countCluster++; | |
101 | if (!cluster->Isolated()) countOverlap++; | |
102 | ||
103 | // Total spectrum | |
104 | hClusAll->Fill(energy); | |
105 | ||
106 | if (cluster->Isolated()) { | |
107 | ||
108 | // Noise spectrum | |
109 | if (track0 < 0) { | |
110 | hClusNoise->Fill(energy); | |
111 | } | |
112 | ||
113 | // Electron cluster | |
114 | if ((particle) && (particle->GetPdgCode() == 11) && (track1 < 0)) { | |
115 | hClusEl->Fill(energy); | |
116 | } | |
117 | ||
118 | // Pion cluster | |
119 | if ((particle) && (particle->GetPdgCode() == -211) && (track1 < 0)) { | |
120 | hClusPi->Fill(energy); | |
121 | } | |
122 | ||
123 | } | |
124 | ||
125 | } | |
126 | ||
127 | } | |
128 | ||
129 | cout << "<AliTRDanalyzeCluster> Found " << countCluster << " cluster in total" << endl; | |
130 | cout << "<AliTRDanalyzeCluster> Found " << countOverlap << " overlapping cluster" << endl; | |
131 | cout << endl; | |
132 | ||
133 | TCanvas *cCluster = new TCanvas("cCluster","AliTRDanalyzeCluster",50,50,600,600); | |
134 | cCluster->Divide(2,2); | |
135 | ||
136 | TF1 *fun; | |
137 | cCluster->cd(1); | |
138 | gPad->SetLogy(); | |
139 | hClusAll->Fit("landau","0"); | |
140 | fun = (TF1 *) hClusAll->GetListOfFunctions()->First(); | |
141 | Float_t meanAll = fun->GetParameter(1); | |
142 | hClusAll->Draw(); | |
143 | fun->SetLineColor(2); | |
144 | fun->Draw("SAME"); | |
145 | ||
146 | cCluster->cd(2); | |
147 | gPad->SetLogy(); | |
148 | Float_t meanNoise = hClusNoise->GetMean(); | |
149 | hClusNoise->Draw(); | |
150 | ||
151 | cCluster->cd(3); | |
152 | gPad->SetLogy(); | |
153 | hClusEl->Fit("landau","0"); | |
154 | fun = (TF1 *) hClusEl->GetListOfFunctions()->First(); | |
155 | fun->SetLineColor(2); | |
156 | Float_t meanEl = fun->GetParameter(1); | |
157 | hClusEl->Draw(); | |
158 | fun->Draw("SAME"); | |
159 | ||
160 | cCluster->cd(4); | |
161 | gPad->SetLogy(); | |
162 | hClusPi->Fit("landau","0"); | |
163 | fun = (TF1 *) hClusPi->GetListOfFunctions()->First(); | |
164 | fun->SetLineColor(2); | |
165 | Float_t meanPi = fun->GetParameter(1); | |
166 | hClusPi->Draw(); | |
167 | fun->Draw("SAME"); | |
168 | ||
169 | cout << endl; | |
170 | cout << "##################################################################" << endl; | |
171 | cout << " Mean all = " << meanAll << endl; | |
172 | cout << " Mean noise = " << meanNoise << endl; | |
173 | cout << " Mean electrons = " << meanEl << endl; | |
174 | cout << " Mean pions = " << meanPi << endl; | |
175 | cout << "##################################################################" << endl; | |
176 | cout << endl; | |
177 | ||
178 | return rc; | |
179 | ||
180 | } |