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 **************************************************************************/
18 ==========================================================
19 Please add to this README file all information concerning
20 config files, simulation, digitalization, clusterization,
21 reconstruction and macro analysis
23 ==========================================================
24 How to run a MUON generation
25 ==========================================================
27 root [0] gAlice->Run(10,"$ALICE_ROOT/MUON/Config_MUON_test.C");
29 1 single muon of 7 GeV/c in the MUON spectrometer
30 acceptance will be simulated using geant3.
31 Hit information will be store in the root file in the
33 If you want to change the option or to define a new directory
34 for hits, you have to do the following before:
35 root [0] gAlice->SetConfigFunction("Config( \"/home/martinez/aliroot/work_NewIO/test/\" , \"box\" );");
37 ============================================================
38 How to run MUON Digitalization
39 ============================================================
40 To process the digitalization of hits the AliRunDigitizer
43 AliRunDigitizer * manager = new AliRunDigitizer(1,1);
44 manager->SetInputStream(0,"galice.root");
45 AliMUONDigitizerv1* dMUON = new AliMUONDigitizerv1(manager)
46 manager->AddDigitizer(dMUON);
49 ============================================================
50 How to run MUON RecPoint clusterization
51 ============================================================
53 .includepath $ALICE_ROOT/STEER
54 .includepath $ALICE_ROOT/MUON
55 .L $ALICE_ROOT/MUON/MUONrawclusters.C++
56 MUONrawclusters("galice.root",0,9999);
58 gSystem->Load("$ALICE_ROOT/MUON/MUONrawclusters_C.so")
60 ============================================================
61 How to run MUON Trigger
62 ============================================================
63 .includepath $ALICE_ROOT/STEER
64 .includepath $ALICE_ROOT/MUON
65 .L $ALICE_ROOT/MUON/MUONtrigger.C++
66 MUONtrigger("galice.root",0,9999);
68 gSystem->Load("$ALICE_ROOT/MUON/MUONtrigger_C.so")
69 ============================================================
70 How to run MUON Tracking reconstruction (old output)
71 ===========================================================
72 .includepath $ALICE_ROOT/STEER
73 .includepath $ALICE_ROOT/MUON
74 .L $ALICE_ROOT/MUON/MUONrecoNtuple.C++
75 MUONrecoNtuple(0,9999,0,"galice.root")
77 gSystem->Load("$ALICE_ROOT/MUON/MUONrecoNtuple_C.so")
78 First event and last event are given by hand, but this will change.
80 ===========================================================
81 How to run MUON Tracking reconstruction (new output)
82 ===========================================================
83 .includepath $ALICE_ROOT/STEER
84 .includepath $ALICE_ROOT/MUON
85 .L $ALICE_ROOT/MUON/MUONTracker.C++
86 MUONTracker("galice.root",0,9999);
88 gSystem->Load("$ALICE_ROOT/MUON/MUONTracker_C.so")
89 Output in MUON.Tracks.root using the new IO
90 as a TClonesArray of AliMUONTrack
92 Note1.In the actual version (dec-03) the following data
93 members of ALiMUONTrack: fgFitter, fEventReconstructor,
94 and fTrackHitsPtr are not saved in the MUON.Track.root file
96 ===========================================================
97 How to run MUON Trigger Track reconstruction (new output)
98 ===========================================================
99 .includepath $ALICE_ROOT/STEER
100 .includepath $ALICE_ROOT/MUON
101 .L $ALICE_ROOT/MUON/MUONTriggerTracker.C++
102 MUONTriggerTracker("galice.root",0,10);
104 gSystem->Load("$ALICE_ROOT/MUON/MUONTriggerTracker_C.so")
105 Output in MUON.Tracks.root using the new IO
106 as a TClonesArray of AliMUONTriggerTrack
109 ============================================================
110 How to run MUONCheck macro
111 ============================================================
112 To check the content of a root data file, the MUONCheck
113 provides a ascii output on screen.
115 To compile MUONCheck.C
116 .includepath $ALICE_ROOT/STEER
117 .includepath $ALICE_ROOT/MUON
118 .L $ALICE_ROOT/MUON/MUONCheck.C++
120 gSystem->Load("$ALICE_ROOT/MUON/MUONCheck_C.so")
122 To print Kine : (default file is galice.root )
125 To print hits : (default file is galice.root if not MUONhits("toto.root""); )
128 To print digits : (default file is galice.root)
131 To print rawcluster : (default file is galice.root)
134 To print trigger : (default file is galice.root)
138 ============================================================
139 How to check the Geometry
140 ============================================================
141 gAlice->Init("$ALICE_ROOT/MUON/Config_MUON_test.C");
142 .L $ALICE/geant3/TGeant3/G3GUI.C
146 ============================================================
147 How to run MUONdisplay
148 ============================================================
149 First you need to perform a full simulation:
150 generation, digitalisation and clusterisation
151 .L $ALICE_ROOT/MUON/MUONdisplay.C
152 MUONdisplay(0,"galice.root")
154 ============================================================
155 Tracking parameters, cuts, energy loss and physics processes
156 ============================================================
157 Tracking parameters in MUON are automatically defined by GEANT
158 MUON takes the default values of CUTs and physics processes
159 defined by the Config files, except for the gas mixture medium
160 of the tracking chambers. The CUT's and physics processes of
161 the gas mixture medium is then defined in the galice.cuts file
162 in the data directory. In particular ILOSS parameter MUST be
163 equal unity (1) in order simulate a realistic energy loss
164 distribution (mean value and fluctuations) in the active gas.
166 ============================================================
167 Tracking of particle in the magnetic field
168 ============================================================
169 GEANT has two ways for tracking charged particles in the
170 magnetic field: HELIX et RKUTA.
171 HELIX is faster and works well if the gradient of magnetic
173 For MUON, HELIX is a not a good approximation and we must
174 use RKUTA to get the optimal mass resolution of the
175 spectrometer. The choice of HELIX or RKUTA is done in the
176 config file when the magnetic field is defined:
177 AliMagFMaps* field = new AliMagFMaps("Maps","Maps", TRACKING, FACTOR, MAXB, AliMagFMaps::k4kG);
178 gAlice->SetField(field);
179 TRACKING must be 1 for RKUTA and 2 for HELIX (the default value for aliroot is 2 (HELIX))
180 FACTOR allows you to set the magnetic field to 0, just putting FACTOR=0. Default value is 1.
181 MAXB is the maximum magnetic field which is 10.T
182 ===========================================================
183 MUON cocktail for physics ..............
184 ===========================================================
185 There is a MUON cocktail generator of the muon sources in the
186 EVGEN directory. This class derives from AliGenCocktail.
187 In the init of this class I have filled the cocktail with
188 the muon sources: J/Psi, Upsilon, Open Charm, Open Beauty,
189 Pion, Kaons. The code needs only the production cross section
190 at 4pi (for the moment this values are in the code since I
191 prefere them do not be modified), and the code calculates the
192 rate of particles in the acceptance, making the scaling based
193 on the number of collisions for the hard probes and on the
194 number of participants for soft sources: Pions and Kaons.
196 In the Genereate of this class all entries in the cocktail
197 are called and we define a "primordial trigger" with requires
198 a minimum number of muons above a Pt cut in the required acceptance.
199 In order to normalized to the real number of simulated events,
200 there are 2 data members in the class fNsuceeded adn fNGenerate
201 which tell us what is the biais source.
203 Enclose an example to use this generator:
204 AliGenMUONCocktail * gener = new AliGenMUONCocktail();
205 gener->SetPtRange(1.,100.); // Transverse momentum range
206 gener->SetPhiRange(0.,360.); // Azimuthal angle range
207 gener->SetYRange(-4.0,-2.4);
208 gener->SetMuonPtCut(1.);
209 gener->SetMuonThetaCut(171.,178.);
210 gener->SetMuonMultiplicity(2);
211 gener->SetNumberOfCollisions(1950.);
212 gener->SetNumberOfParticipants(400.);
213 gener->SetVertexSmear(kPerTrack);
214 gener->SetOrigin(0,0,0); // Vertex position
215 gener->SetSigma(0,0,0.0); // Sigma in (X,Y,Z) (cm) on IP position
219 ===========================================================
220 Still working ..............
221 ===========================================================