| Geant4 Cross Reference |
1
2 =========================================
3 Geant4 - an Object-Oriented Toolkit for S
4 =========================================
5
6 Hadr06
7 ------
8
9 Survey energy deposition and particle's flu
10 Use PhysicsConstructor objects rather than
11
12
13 1- MATERIALS AND GEOMETRY DEFINITION
14
15 The geometry is a single sphere (absorber)
16
17 Two parameters define the geometry :
18 - the radius of the sphere
19 - the material of the sphere
20
21 The default geometry (R=30 cm of water) is
22 DetectorConstruction, but the above paramet
23 via commands defined in DetectorMessenger.
24
25 The absorber is surrounded by a World volum
26
27 A function, and its associated UI command,
28 directly from a single isotope.
29
30 To be identified by the ThermalScattering m
31 material must have a specific name (see G4P
32 Examples of such materials are build in Det
33
34 2- PHYSICS LIST
35
36 "Full" set of physics processes are register
37 objects rather than complete pre-defined G4
38 way gives more freedom to register physics.
39
40 Physics constructors are either constructors
41 or 'local'. They include : HadronElastic, Ha
42 RadioactiveDecay and Electomagnetic.
43 (see geant4/source/physics_lists/constructor
44
45 HadronElasticPhysicsHP include a model for t
46 defined in NeutronHPMesseger.
47
48 GammmaNuclearPhysics is a subset of G4Bertin
49
50 ElectromagneticPhysics is a simplified versi
51
52 Several hadronic physics options are control
53 To trigger them, see Hadr06.cc
54
55 3- AN EVENT : THE PRIMARY GENERATOR
56
57 The primary kinematic is a single particle
58 centre of the sphere. The type of the parti
59 PrimaryGeneratorAction (neutron 14 MeV), an
60 build-in commands of ParticleGun class (see
61 this example).
62
63 4- PHYSICS
64
65 The program computes and plots energy depos
66 (absorber) and the flux of particles leavin
67 Processes invoked and particles generated d
68
69 5- HISTOGRAMS
70
71 The test contains 24 built-in 1D histograms
72
73 1 "total energy deposit"
74 2 "Edep (MeV/mm) profile along
75 3 "total kinetic energy flow"
76 4 "energy spectrum of gamma at
77 5 "energy spectrum of e+- at c
78 6 "energy spectrum of neutrons
79 7 "energy spectrum of protons
80 8 "energy spectrum of deuteron
81 9 "energy spectrum of alphas a
82 10 "energy spectrum of all othe
83 11 "energy spectrum of all othe
84 12 "energy spectrum of all othe
85 13 "energy spectrum of all othe
86 14 "energy spectrum of emerging
87 15 "energy spectrum of emerging
88 16 "energy spectrum of emerging
89 17 "energy spectrum of emerging
90 18 "energy spectrum of emerging
91 19 "energy spectrum of emerging
92 20 "energy spectrum of all othe
93 21 "energy spectrum of all othe
94 22 "energy spectrum of all othe
95 23 "energy spectrum of all othe
96 24 "total energy released : ede
97
98 The histograms are managed by the HistoMana
99 The histos can be individually activated wi
100 /analysis/h1/set id nbBins valMin valMax u
101 where unit is the desired unit for the hist
102
103 One can control the name of the histograms
104 /analysis/setFileName name (default Hadr0
105
106 It is possible to choose the format of the
107 xml, csv, by using namespace in HistoManage
108
109 It is also possible to print selected histo
110 /analysis/h1/setAscii id
111 All selected histos will be written on a fi
112
113 6- VISUALIZATION
114
115 The Visualization Manager is set in the mai
116 The initialisation of the drawing is done v
117 /vis/... in the macro vis.mac. To get visua
118 > /control/execute vis.mac
119
120 The tracks are drawn at the end of event, a
121 gamma green
122 neutron yellow
123 negative particles (e-, ...) red
124 positive particles (e+, ions, ...) blue
125
126 7- HOW TO START ?
127
128 Execute Hadr06 in 'batch' mode from macro f
129 % Hadr06 run1.mac
130
131 Execute Hadr06 in 'interactive mode' with v
132 % Hadr06
133 Idle> control/execute vis.mac
134 ....
135 Idle> type your commands
136 ....
137 Idle> exit
138
139 Macros provided in this example:
140 - hadr06.in: macro used in Geant4 testing to
141 - graphite.mac: neutron,14 MeV, in graphite
142 - run1.mac: neutron,14 MeV, in Li7
143 - singleFission.mac: single fission in U235
144
145 Macros to be run interactively:
146 - debug.mac: water with thermal scattering
147 - fission.mac: U235
148 - vis.mac: To activate visualization
149