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[u/mrichter/AliRoot.git] / MUON / READMEtrigger.txt
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518eb852 1// $Id$
2
3/*!
4
91509ec6 5\page README_trigger Trigger
518eb852 6
7
8\section trigger_s1 How to reprocess trigger decision from already produced digits
2ce5e44e 9
2ce5e44e 10The MUONTrigger.C macro can be used to check the trigger algorithm w/o
11having to (re-)perform simulation and digitalization.
12It loads the digits, erase TreeR and store the current trigger output in
13TreeR.
518eb852 14
2ce5e44e 15The different trigger outputs can be compared by looking at the GLT branch
16of TreeD (filled during simulation) and the TC branch of TreeR (filled from
17a copy of TreeD during reconstruction or with this macro).
18Note: rec points from tracking chamber will be lost.
518eb852 19
2ce5e44e 20Usage:
518eb852 21<pre>
2ce5e44e 22root [0] .L $ALICE_ROOT/MUON/MUONTrigger.C+
53958b19 23root [1] MUONTrigger("galice.root")
518eb852 24</pre>
25
2ce5e44e 26
518eb852 27\section trigger_s2 OFFLINE trigger GUI data quality and debugging tool
2ce5e44e 28
2ce5e44e 29- read digits and local trigger decision from simulated/real data
30- display
31- reprocess trigger decision inside AliRoot
32- set x/y strips interactively on boards and transfer them to the AliRoot
33 TriggerElectronics, execute trigger algorithm and recover the local trigger
34 decision
35
518eb852 36To run:
2ce5e44e 37
518eb852 38<pre>
2ce5e44e 39aliroot
40new AliMUONTriggerGUI()
518eb852 41</pre>
2ce5e44e 42
518eb852 43Main window shows the map of the local boards as seen from the I.P.
44The main window is position sensitive (after file initialization) and it is
2ce5e44e 45possible to open a GUI for a circuit.
46
47By menus:
48
2ce5e44e 49
518eb852 50\subsection trigger_s2_sub1 File
2ce5e44e 51
518eb852 52- Run - open a file and start with a given event number
91509ec6 53 takes the full path your_path/galice.root
518eb852 54- Control - navigate in the tree with events
55- Exit - exit the main application
2ce5e44e 56
2ce5e44e 57
518eb852 58\subsection trigger_s2_sub2 Maps
2ce5e44e 59
518eb852 60- Digits map - graphical map with digits in the four chambers, MT11 ... MT22
2ce5e44e 61
518eb852 62\subsection trigger_s2_sub3 Chambers digit maps window
2ce5e44e 63
518eb852 64- Update - update the map after:
2ce5e44e 65 - loading of another event
66 - changing interactively the strip signals in boards GUI
67
2ce5e44e 68
518eb852 69\subsection trigger_s2_sub4 Circuit
70
71- Open - open a board GUI by circuit number
2ce5e44e 72
2ce5e44e 73
518eb852 74\subsection trigger_s2_sub5 Trigger
2ce5e44e 75
518eb852 76- Trigger DSET - (re)run the trigger algorithm
77
78
79\subsection trigger_s2_sub6 Circuit GUI window
2ce5e44e 80
81- visualize x/y strips
82- "Set/unset" x (or) y strips
83- "Digits" create board digits from the actual configuration created in the GUI
84- "Reset" reset modification on strips done interactively
85
2ce5e44e 86
518eb852 87\section trigger_s3 How to check integrated trigger efficiency
2ce5e44e 88
2ce5e44e 89The MUONTriggerEfficiency.C macro (included in the check scripts) calculates
90the trigger efficiency for the 2 pt cuts.
91The output is stored in MUONTriggerEfficiency.out file.
518eb852 92
2ce5e44e 93Usage:
518eb852 94<pre>
2ce5e44e 95root [0] .L $ALICE_ROOT/MUON/MUONTriggerEfficiency.C+
96root [1] MUONTriggerEfficiency()
518eb852 97</pre>
98
2ce5e44e 99For the CVS default version of the trigger LUT (i.e. lutAptLpt1Hpt1p7.root),
100The reference for J/psi and Upsilon is as below
101 For 1000 Jpsi events with:
518eb852 102<pre>
2ce5e44e 103 AliGenParam *gener = new AliGenParam(1, AliGenMUONlib::kJpsi);
104 gener->SetMomentumRange(0,999);
105 gener->SetPtRange(0,100.);
106 gener->SetPhiRange(0., 360.);
107 gener->SetCutOnChild(1);
108 gener->SetChildPhiRange(0.,360.);
109 gener->SetChildThetaRange(171.0,178.0);
110 gener->SetOrigin(0,0,0);
111 gener->SetForceDecay(kDiMuon);
112 gener->SetTrackingFlag(1);
518eb852 113</pre>
114
2ce5e44e 115 the output should be
518eb852 116<pre>
2ce5e44e 117 Efficiency Lpt cut = 0.7362 +/- 0.0391
118 Efficiency Hpt cut = 0.2662 +/- 0.0201
518eb852 119</pre>
120
2ce5e44e 121 Similarly, for 1000 Upsilon events, the output should be
518eb852 122
123<pre>
2ce5e44e 124 Efficiency Lpt cut = 0.9806 +/- 0.0457
125 Efficiency Hpt cut = 0.9537 +/- 0.0448
518eb852 126</pre>
127
128
129\section trigger_s4 How to check single muon trigger efficiency versus pt
2ce5e44e 130
2ce5e44e 131The MUONTriggerEfficiencyPt.C macro produces trigger single muon efficiency
132versus pt plots for the 2 pt cuts.
133Results are compared to the reference (red curves).
134To be used with (at least) 10000 events as follows
518eb852 135<pre>
2ce5e44e 136 AliGenBox * gener = new AliGenBox(1);
137 gener->SetPtRange(0.,10.);
138 gener->SetPhiRange(0., 360.);
139 gener->SetThetaRange(171.000,178.001);
140 gener->SetPart(13); // or -13
141 gener->SetOrigin(0.,0., 0.);
142 gener->SetSigma(0.0, 0.0, 0.0);
518eb852 143</pre>
144
2ce5e44e 145Outputs are stored in MUONTriggerEfficiencyPt.gif/eps/out files
146Important note: this macro works with one (real) muon track per event only
518eb852 147
2ce5e44e 148Usage:
518eb852 149<pre>
2ce5e44e 150root [0] .L $ALICE_ROOT/MUON/MUONTriggerEfficiencyPt.C+
151root [1] MUONTriggerEfficiencyPt()
518eb852 152</pre>
153
154
155\section trigger_s5 How to get trigger chamber efficiency from data
2ce5e44e 156
2ce5e44e 157Trigger chamber efficiency map is calculated during reconstruction and saved in AliESDs.root
158In order to view and save the map, use macro MUONTriggerChamberEfficiency.C
159
160To compile MUONTriggerChamberEfficiency.C
518eb852 161<pre>
2ce5e44e 162.includepath $ALICE_ROOT/MUON
163.L $ALICE_ROOT/MUON/MUONTriggerChamberEfficiency.C+
518eb852 164</pre>
2ce5e44e 165
518eb852 166To run MUONTriggerChamberEfficiency.C
167<pre>
2ce5e44e 168MUONTriggerChamberEfficiency();
518eb852 169</pre>
2ce5e44e 170
518eb852 171If you want to make the calculated map available for next simulation use option kTRUE, i.e.
172<pre>
2ce5e44e 173MUONTriggerChamberEfficiency(kTRUE);
518eb852 174</pre>
2ce5e44e 175
176When running next simulation, please remember to activate trigger efficiency
177by adding in Config.C:
518eb852 178<pre>
2ce5e44e 179MUON->SetTriggerEffCells(1);
518eb852 180</pre>
181
91509ec6 182This chapter is defined in the READMEtrigger.txt file.
183
518eb852 184*/
2ce5e44e 185