| Geant4 Cross Reference |
1 ----------------------------------------------
2
3 =========================================
4 Geant4 - an Object-Oriented Toolkit for S
5 =========================================
6
7 TestEm15
8 --------
9
10 How to compute and plot the final stat
11 - Multiple Scattering
12 - Gamma Conversion
13 considered as an isolated processes, see PHY
14
15 For Multiple Scattering, the method is expos
16
17 For Gamma Conversion, when G4BetheHeitler5DM
18 see README.gamma for Histograms and UI comma
19
20 1- GEOMETRY DEFINITION
21
22 It is a single box representing a 'sem
23 Two parameters define the geometry:
24 - the material of the box,
25 - the (full) size of the box.
26
27 The default geometry (100 m of water)
28 DetectorConstruction, but the above pa
29 interactively via the commands defined
30
31 2- PHYSICS LIST
32
33 The physics list contains the standard
34 In order not to introduce 'artificial'
35 there is no limitation from the maximu
36
37 3- AN EVENT: THE PRIMARY GENERATOR
38
39 The primary kinematic consists of a si
40 of the box. The type of the particle a
41 PrimaryGeneratorAction (1 MeV electron
42 build-in commands of ParticleGun class
43 this example).
44
45 4- PHYSICS
46
47 All discrete processes are inactivated
48 so that Multiple Scattering or Gamma C
49 determine the first step of the primar
50 The step size and the final state are
51 Then the event is immediately killed.
52
53 Multiple Scattering:
54
55 The result is compared with the 'input' data
56 sections stored in the PhysicsTables a
57 The stepMax command provides an additi
58 the multiple scattering.
59
60
61 5- HISTOGRAMS
62
63 The test contains 16 built-in 1D histo
64 G4AnalysisManager and its Messenger. T
65 activated with the command:
66 /analysis/h1/set id nbBins valMin val
67 where unit is the desired unit for the
68 (see the macros xxxx.mac).
69
70 1 Multiple Scattering. True step
71 2 Multiple Scattering. Geom step
72 3 Multiple Scattering. Ratio geo
73 4 Multiple Scattering. Lateral d
74 5 Multiple Scattering. Lateral d
75 6 Multiple Scattering. Angular d
76 7 Multiple Scattering. Phi-posit
77 8 Multiple Scattering. Phi-direc
78 9 Multiple Scattering. Correlati
79
80 10 Gamma Conversion. Open Angle *
81 11 Gamma Conversion. Log10(P reco
82 12 Gamma Conversion. Phi P recoil
83 13 Gamma Conversion. Phi P plus a
84 14 Gamma Conversion. 2 * cos(phip
85 15 Gamma Conversion. E plus / E g
86 16 Gamma Conversion. Phi of Gamma
87
88
89 The histograms are managed by the HistoMana
90 The histos can be individually activated wi
91 /analysis/h1/set id nbBins valMin valMax u
92 where unit is the desired unit for the hist
93
94 One can control the name of the histograms
95 /analysis/setFileName name (default teste
96
97 It is possible to choose the format of the
98 hdf5, xml, csv, by changing the default fil
99
100 It is also possible to print selected histo
101 /analysis/h1/setAscii id
102 All selected histos will be written on a fi
103
104 6- VISUALIZATION
105
106 The Visualization Manager is set in th
107 The initialization of the drawing is d
108 /vis/... in the macro vis.mac. To get
109 > /control/execute vis.mac
110
111 The detector has a default view which
112 box.
113
114 The tracks are drawn at the end of eve
115
116 7- HOW TO START ?
117
118 execute TestEm15 in 'batch' mode from
119 % TestEm15 compt.mac
120
121 execute TestEm15 in 'interactive mode'
122 % TestEm15
123 Idle> control/execute vis.mac
124 ....
125 Idle> type your commands
126 ....
127 Idle> exit
128
129 8 - MACROS
130 The examples of macros for Multiple Sca
131 electron.mac muon.mac proton.mac
132
133 The example of Gamma Conversion macro:
134 gamma.mac - gamma to e+ e-
135 gamma2mumu.mac gamma to mu+ mu-