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6ef73001 | 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 | ||
18 | /// \ingroup macros | |
19 | /// \file genExtFileConfig.C | |
20 | /// \brief Configuration macro for event generator from external file | |
21 | /// for MUON spectrometer Monte Carlo simulation | |
22 | ||
23 | // Functions | |
24 | Float_t EtaToTheta(Float_t arg); | |
25 | AliGenerator* GeneratorFactory(); | |
26 | ||
27 | void genConfig() | |
28 | { | |
29 | cout << "Running genExtFileConfig.C ... " << endl; | |
30 | ||
31 | //======================================================================= | |
32 | // ******* GEANT STEERING parameters FOR ALICE SIMULATION ******* | |
33 | if ( gMC ) { | |
34 | gMC->SetProcess("DCAY",1); | |
35 | gMC->SetProcess("PAIR",1); | |
36 | gMC->SetProcess("COMP",1); | |
37 | gMC->SetProcess("PHOT",1); | |
38 | gMC->SetProcess("PFIS",0); | |
39 | gMC->SetProcess("DRAY",0); | |
40 | gMC->SetProcess("ANNI",1); | |
41 | gMC->SetProcess("BREM",1); | |
42 | gMC->SetProcess("MUNU",1); | |
43 | gMC->SetProcess("CKOV",1); | |
44 | gMC->SetProcess("HADR",1); | |
45 | gMC->SetProcess("LOSS",2); | |
46 | gMC->SetProcess("MULS",1); | |
47 | gMC->SetProcess("RAYL",1); | |
48 | Float_t cut = 1.e-3; // 1MeV cut by default | |
49 | Float_t tofmax = 1.e10; | |
50 | gMC->SetCut("CUTGAM", cut); | |
51 | gMC->SetCut("CUTELE", cut); | |
52 | gMC->SetCut("CUTNEU", cut); | |
53 | gMC->SetCut("CUTHAD", cut); | |
54 | gMC->SetCut("CUTMUO", cut); | |
55 | gMC->SetCut("BCUTE", cut); | |
56 | gMC->SetCut("BCUTM", cut); | |
57 | gMC->SetCut("DCUTE", cut); | |
58 | gMC->SetCut("DCUTM", cut); | |
59 | gMC->SetCut("PPCUTM", cut); | |
60 | gMC->SetCut("TOFMAX", tofmax); | |
61 | } | |
62 | ||
63 | //======================================================================= | |
64 | // External decayer | |
65 | //======================================================================= | |
66 | ||
67 | // Set External decayer | |
68 | TVirtualMCDecayer *decayer = new AliDecayerPythia(); | |
69 | decayer->SetForceDecay(kAll); | |
70 | decayer->Init(); | |
71 | if ( gMC ) gMC->SetExternalDecayer(decayer); | |
72 | ||
73 | //======================================================================= | |
74 | // Event generator | |
75 | //======================================================================= | |
76 | ||
77 | // External generator configuration | |
78 | AliGenerator* gener = GeneratorFactory(); | |
79 | gener->SetOrigin(0, 0, 0); // vertex position | |
80 | //gener->SetSigma(0, 0, 5.3); // Sigma in (X,Y,Z) (cm) on IP position | |
81 | //gener->SetCutVertexZ(1.); // Truncate at 1 sigma | |
82 | //gener->SetVertexSmear(kPerEvent); | |
83 | gener->SetTrackingFlag(1); | |
84 | gener->Init(); | |
85 | ||
86 | cout << "Running genExtFileConfig.C finished ... " << endl; | |
87 | } | |
88 | ||
89 | Float_t EtaToTheta(Float_t arg){ | |
90 | return (180./TMath::Pi())*2.*atan(exp(-arg)); | |
91 | } | |
92 | ||
93 | AliGenerator* GeneratorFactory() { | |
94 | ||
95 | AliGenExtFile *gener = new AliGenExtFile(-1); | |
96 | AliGenReaderTreeK * reader = new AliGenReaderTreeK(); | |
97 | ||
98 | reader->SetFileName("galice.root"); | |
99 | reader->AddDir("$ALICE_ROOT/MUON/gen"); | |
100 | gener->SetReader(reader); | |
101 | ||
102 | return gener; | |
103 | } | |
104 |