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50837721 | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
3 | * * | |
4 | * Author: The ALICE Off-line Project. * | |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
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 | **************************************************************************/ | |
15 | ||
16 | /* $Id$ */ | |
17 | ||
88cb7938 | 18 | ========================================================== |
19 | Please add to this README file all information concerning | |
20 | config files, simulation, digitalization, clusterization, | |
21 | reconstruction and macro analysis | |
22 | ||
23 | ========================================================== | |
7985603c | 24 | How to run a MUON generation |
88cb7938 | 25 | ========================================================== |
26 | aliroot | |
27 | root [0] gAlice->Run(10,"$ALICE_ROOT/MUON/Config_MUON_test.C"); | |
28 | ||
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 | |
32 | execution directory. | |
88cb7938 | 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\" );"); | |
36 | ||
37 | ============================================================ | |
38 | How to run MUON Digitalization | |
39 | ============================================================ | |
40 | To process the digitalization of hits the AliRunDigitizer | |
41 | framework is used: | |
42 | ||
2058bf30 | 43 | AliRunDigitizer * manager = new AliRunDigitizer(1,1); |
44 | manager->SetInputStream(0,"galice.root"); | |
e6dd99fc | 45 | AliMUONDigitizerv1* dMUON = new AliMUONDigitizerv1(manager) |
2058bf30 | 46 | manager->AddDigitizer(dMUON); |
47 | manager->Exec("deb"); | |
88cb7938 | 48 | |
49 | ============================================================ | |
50 | How to run MUON RecPoint clusterization | |
51 | ============================================================ | |
52 | aliroot -b << EOF | |
278a86d5 | 53 | .includepath $ALICE_ROOT/STEER |
54 | .includepath $ALICE_ROOT/MUON | |
55 | .L $ALICE_ROOT/MUON/MUONrawclusters.C++ | |
bf17dbfd | 56 | MUONrawclusters("galice.root",0,9999); |
57 | to Load | |
58 | gSystem->Load("$ALICE_ROOT/MUON/MUONrawclusters_C.so") | |
88cb7938 | 59 | |
88cb7938 | 60 | ============================================================ |
61 | How to run MUON Trigger | |
62 | ============================================================ | |
ba9436c6 | 63 | .includepath $ALICE_ROOT/STEER |
64 | .includepath $ALICE_ROOT/MUON | |
65 | .L $ALICE_ROOT/MUON/MUONtrigger.C++ | |
bf17dbfd | 66 | MUONtrigger("galice.root",0,9999); |
50837721 | 67 | To Load |
68 | gSystem->Load("$ALICE_ROOT/MUON/MUONtrigger_C.so") | |
2b32c661 | 69 | |
88cb7938 | 70 | ============================================================ |
dcd2690d | 71 | How to run MUON Tracking reconstruction (old output) |
fb76e306 | 72 | =========================================================== |
2058bf30 | 73 | .includepath $ALICE_ROOT/STEER |
74 | .includepath $ALICE_ROOT/MUON | |
75 | .L $ALICE_ROOT/MUON/MUONrecoNtuple.C++ | |
50837721 | 76 | MUONrecoNtuple(0,9999,0,"galice.root") |
77 | To Load | |
78 | gSystem->Load("$ALICE_ROOT/MUON/MUONrecoNtuple_C.so") | |
88cb7938 | 79 | First event and last event are given by hand, but this will change. |
80 | ||
dcd2690d | 81 | =========================================================== |
82 | How to run MUON Tracking reconstruction (new output) | |
83 | =========================================================== | |
84 | .includepath $ALICE_ROOT/STEER | |
85 | .includepath $ALICE_ROOT/MUON | |
86 | .L $ALICE_ROOT/MUON/MUONTracker.C++ | |
bf17dbfd | 87 | MUONTracker("galice.root",0,9999); |
50837721 | 88 | To Load |
89 | gSystem->Load("$ALICE_ROOT/MUON/MUONTracker_C.so") | |
dcd2690d | 90 | Output in MUON.Tracks.root using the new IO |
91 | as a TClonesArray of AliMUONTrack | |
92 | ||
374ebd7d | 93 | Note1.In the actual version (dec-03) the following data |
94 | members of ALiMUONTrack: fgFitter, fEventReconstructor, | |
95 | and fTrackHitsPtr are not saved in the MUON.Track.root file | |
96 | ||
a3448039 | 97 | =========================================================== |
98 | How to run MUON Trigger Track reconstruction (new output) | |
99 | =========================================================== | |
100 | .includepath $ALICE_ROOT/STEER | |
101 | .includepath $ALICE_ROOT/MUON | |
102 | .L $ALICE_ROOT/MUON/MUONTriggerTracker.C++ | |
103 | MUONTriggerTracker("galice.root",0,10); | |
104 | To Load | |
105 | gSystem->Load("$ALICE_ROOT/MUON/MUONTriggerTracker_C.so") | |
106 | Output in MUON.Tracks.root using the new IO | |
107 | as a TClonesArray of AliMUONTriggerTrack | |
108 | ||
109 | ||
88cb7938 | 110 | ============================================================ |
111 | How to run MUONCheck macro | |
112 | ============================================================ | |
113 | To check the content of a root data file, the MUONCheck | |
114 | provides a ascii output on screen. | |
115 | ||
116 | To compile MUONCheck.C | |
2058bf30 | 117 | .includepath $ALICE_ROOT/STEER |
118 | .includepath $ALICE_ROOT/MUON | |
119 | .L $ALICE_ROOT/MUON/MUONCheck.C++ | |
bf17dbfd | 120 | To Load |
121 | gSystem->Load("$ALICE_ROOT/MUON/MUONCheck_C.so") | |
2058bf30 | 122 | |
278a86d5 | 123 | To print Kine : (default file is galice.root ) |
2b32c661 | 124 | MUONkine() or MUONkine("galice.root",##) for the event number ## |
88cb7938 | 125 | |
126 | To print hits : (default file is galice.root if not MUONhits("toto.root""); ) | |
2b32c661 | 127 | MUONhits() or MUONhits("galice.root",##) for the event number ## |
88cb7938 | 128 | |
129 | To print digits : (default file is galice.root) | |
2b32c661 | 130 | MUONdigits() or MUONdigits("galice.root",##) for the event number ## |
88cb7938 | 131 | |
132 | To print rawcluster : (default file is galice.root) | |
2b32c661 | 133 | MUONrecpoints() or MUONrecpoints("galice.root",##) for the event number ## |
88cb7938 | 134 | |
135 | To print trigger : (default file is galice.root) | |
2b32c661 | 136 | MUONTestTrigger() or MUONTestTrigger("galice.root",##) for the event number ## |
137 | ||
138 | .... | |
88cb7938 | 139 | |
02d8f072 | 140 | |
141 | ============================================================ | |
142 | How to check the Geometry | |
143 | ============================================================ | |
144 | gAlice->Init("$ALICE_ROOT/MUON/Config_MUON_test.C"); | |
145 | .L $ALICE/geant3/TGeant3/G3GUI.C | |
146 | G3GUI() | |
147 | ||
148 | ||
7985603c | 149 | ============================================================ |
150 | How to run MUONdisplay | |
151 | ============================================================ | |
1eccde20 | 152 | First you need to perform a full simulation: |
7985603c | 153 | generation, digitalisation and clusterisation |
154 | .L $ALICE_ROOT/MUON/MUONdisplay.C | |
155 | MUONdisplay(0,"galice.root") | |
156 | ||
02d8f072 | 157 | ============================================================ |
158 | Tracking parameters, cuts, energy loss and physics processes | |
159 | ============================================================ | |
160 | Tracking parameters in MUON are automatically defined by GEANT | |
161 | MUON takes the default values of CUTs and physics processes | |
162 | defined by the Config files, except for the gas mixture medium | |
163 | of the tracking chambers. The CUT's and physics processes of | |
164 | the gas mixture medium is then defined in the galice.cuts file | |
165 | in the data directory. In particular ILOSS parameter MUST be | |
166 | equal unity (1) in order simulate a realistic energy loss | |
167 | distribution (mean value and fluctuations) in the active gas. | |
a88eb0d0 | 168 | |
169 | ============================================================ | |
170 | Tracking of particle in the magnetic field | |
171 | ============================================================ | |
172 | GEANT has two ways for tracking charged particles in the | |
173 | magnetic field: HELIX et RKUTA. | |
174 | HELIX is faster and works well if the gradient of magnetic | |
175 | field is small. | |
176 | For MUON, HELIX is a not a good approximation and we must | |
177 | use RKUTA to get the optimal mass resolution of the | |
178 | spectrometer. The choice of HELIX or RKUTA is done in the | |
179 | config file when the magnetic field is defined: | |
180 | AliMagFMaps* field = new AliMagFMaps("Maps","Maps", TRACKING, FACTOR, MAXB, AliMagFMaps::k4kG); | |
181 | gAlice->SetField(field); | |
182 | TRACKING must be 1 for RKUTA and 2 for HELIX (the default value for aliroot is 2 (HELIX)) | |
183 | FACTOR allows you to set the magnetic field to 0, just putting FACTOR=0. Default value is 1. | |
184 | MAXB is the maximum magnetic field which is 10.T | |
2b32c661 | 185 | |
f4f795ed | 186 | =========================================================== |
187 | MUON cocktail for physics .............. | |
188 | =========================================================== | |
189 | There is a MUON cocktail generator of the muon sources in the | |
190 | EVGEN directory. This class derives from AliGenCocktail. | |
191 | In the init of this class I have filled the cocktail with | |
192 | the muon sources: J/Psi, Upsilon, Open Charm, Open Beauty, | |
193 | Pion, Kaons. The code needs only the production cross section | |
194 | at 4pi (for the moment this values are in the code since I | |
195 | prefere them do not be modified), and the code calculates the | |
196 | rate of particles in the acceptance, making the scaling based | |
197 | on the number of collisions for the hard probes and on the | |
198 | number of participants for soft sources: Pions and Kaons. | |
199 | ||
200 | In the Genereate of this class all entries in the cocktail | |
201 | are called and we define a "primordial trigger" with requires | |
202 | a minimum number of muons above a Pt cut in the required acceptance. | |
203 | In order to normalized to the real number of simulated events, | |
204 | there are 2 data members in the class fNsuceeded adn fNGenerate | |
205 | which tell us what is the biais source. | |
206 | ||
207 | Enclose an example to use this generator: | |
208 | AliGenMUONCocktail * gener = new AliGenMUONCocktail(); | |
209 | gener->SetPtRange(1.,100.); // Transverse momentum range | |
210 | gener->SetPhiRange(0.,360.); // Azimuthal angle range | |
211 | gener->SetYRange(-4.0,-2.4); | |
212 | gener->SetMuonPtCut(1.); | |
213 | gener->SetMuonThetaCut(171.,178.); | |
214 | gener->SetMuonMultiplicity(2); | |
215 | gener->SetNumberOfCollisions(1950.); | |
216 | gener->SetNumberOfParticipants(400.); | |
217 | gener->SetVertexSmear(kPerTrack); | |
218 | gener->SetOrigin(0,0,0); // Vertex position | |
219 | gener->SetSigma(0,0,0.0); // Sigma in (X,Y,Z) (cm) on IP position | |
220 | gener->Init(); | |
221 | ||
2b32c661 | 222 | =========================================================== |
223 | csh Script for the full reconstruction | |
224 | =========================================================== | |
225 | aliroot -b << EOF | |
226 | gAlice->Run(NumberOfEvents,"YourConfig.C"); | |
227 | .q | |
228 | EOF | |
229 | ||
230 | aliroot -b << EOF | |
231 | AliRunDigitizer * manager = new AliRunDigitizer(1,1); | |
232 | manager->SetInputStream(0,"galice.root"); | |
233 | AliMUONDigitizerv1* dMUON = new AliMUONDigitizerv1(manager); | |
234 | manager->AddDigitizer(dMUON); | |
235 | manager->Exec("deb"); | |
236 | .q | |
237 | EOF | |
238 | ||
239 | aliroot -b << EOF | |
240 | .includepath $ALICE_ROOT/STEER | |
241 | .includepath $ALICE_ROOT/MUON | |
242 | .L $ALICE_ROOT/MUON/MUONrawclusters.C++ | |
243 | MUONrawclusters("galice.root",0,99999); | |
244 | .q | |
245 | EOF | |
246 | ||
247 | aliroot -b << EOF | |
248 | .includepath $ALICE_ROOT/STEER | |
249 | .includepath $ALICE_ROOT/MUON | |
250 | .L $ALICE_ROOT/MUON/MUONtrigger.C++ | |
251 | MUONtrigger("galice.root",0,99999); | |
252 | .q | |
253 | EOF | |
254 | ||
255 | aliroot -b << EOF | |
256 | .includepath $ALICE_ROOT/STEER | |
257 | .includepath $ALICE_ROOT/MUON | |
258 | .L $ALICE_ROOT/MUON/MUONTracker.C++ | |
259 | MUONTracker("galice.root",0,99999) | |
260 | .q | |
261 | EOF | |
262 | ||
263 | aliroot -b << EOF | |
264 | .includepath $ALICE_ROOT/STEER | |
265 | .includepath $ALICE_ROOT/MUON | |
266 | .L $ALICE_ROOT/MUON/MUONmassPlot_NewIO.C++ | |
267 | MUONmassPlot("galice.root",0,99999); | |
268 | .q | |
269 | EOF | |
a88eb0d0 | 270 | |
88cb7938 | 271 | =========================================================== |
272 | Still working .............. | |
273 | =========================================================== |