| Geant4 Cross Reference |
1 1
2 ========================================= 2 =========================================================
3 Geant4 - an Object-Oriented Toolkit for S 3 Geant4 - an Object-Oriented Toolkit for Simulation in HEP
4 ========================================= 4 =========================================================
5 5
6 Hadr06 6 Hadr06
7 ------ 7 ------
8 8
9 Survey energy deposition and particle's flu 9 Survey energy deposition and particle's flux from an hadronic cascade.
10 Use PhysicsConstructor objects rather than 10 Use PhysicsConstructor objects rather than predefined G4 PhysicsLists.
11 11
12 12
13 1- MATERIALS AND GEOMETRY DEFINITION 13 1- MATERIALS AND GEOMETRY DEFINITION
14 14
15 The geometry is a single sphere (absorber) 15 The geometry is a single sphere (absorber) of an homogenous material.
16 16
17 Two parameters define the geometry : 17 Two parameters define the geometry :
18 - the radius of the sphere 18 - the radius of the sphere
19 - the material of the sphere 19 - the material of the sphere
20 20
21 The default geometry (R=30 cm of water) is 21 The default geometry (R=30 cm of water) is built in
22 DetectorConstruction, but the above paramet 22 DetectorConstruction, but the above parameters can be changed interactively
23 via commands defined in DetectorMessenger. 23 via commands defined in DetectorMessenger.
24 24
25 The absorber is surrounded by a World volum 25 The absorber is surrounded by a World volume (vacuum)
26 26
27 A function, and its associated UI command, 27 A function, and its associated UI command, allows to build a material
28 directly from a single isotope. 28 directly from a single isotope.
29 29
30 To be identified by the ThermalScattering m 30 To be identified by the ThermalScattering module, the elements composing a
31 material must have a specific name (see G4P 31 material must have a specific name (see G4ParticleHPThermalScatteringNames.cc)
32 Examples of such materials are build in Det 32 Examples of such materials are build in DetectorConstruction.
33 33
34 2- PHYSICS LIST 34 2- PHYSICS LIST
35 35
36 "Full" set of physics processes are register 36 "Full" set of physics processes are registered, but via PhysicsConstructor
37 objects rather than complete pre-defined G4 37 objects rather than complete pre-defined G4 physics lists. This alternative
38 way gives more freedom to register physics. 38 way gives more freedom to register physics.
39 39
40 Physics constructors are either constructors 40 Physics constructors are either constructors provided in Geant4 (with G4 prefix)
41 or 'local'. They include : HadronElastic, Ha 41 or 'local'. They include : HadronElastic, HadronInelastic, IonsInelastic, GammaNuclear,
42 RadioactiveDecay and Electomagnetic. 42 RadioactiveDecay and Electomagnetic.
43 (see geant4/source/physics_lists/constructor 43 (see geant4/source/physics_lists/constructors)
44 44
45 HadronElasticPhysicsHP include a model for t 45 HadronElasticPhysicsHP include a model for thermalized neutrons, under the control of a command
46 defined in NeutronHPMesseger. 46 defined in NeutronHPMesseger.
47 47
48 GammmaNuclearPhysics is a subset of G4Bertin 48 GammmaNuclearPhysics is a subset of G4BertiniElectroNuclearBuilder.
49 49
50 ElectromagneticPhysics is a simplified versi 50 ElectromagneticPhysics is a simplified version of G4EmStandardPhysics.
51 51
52 Several hadronic physics options are control 52 Several hadronic physics options are controlled by environment variables.
53 To trigger them, see Hadr06.cc 53 To trigger them, see Hadr06.cc
54 54
55 3- AN EVENT : THE PRIMARY GENERATOR 55 3- AN EVENT : THE PRIMARY GENERATOR
56 56
57 The primary kinematic is a single particle 57 The primary kinematic is a single particle randomly shooted at the
58 centre of the sphere. The type of the parti 58 centre of the sphere. The type of the particle and its energy are set in
59 PrimaryGeneratorAction (neutron 14 MeV), an 59 PrimaryGeneratorAction (neutron 14 MeV), and can be changed via the G4
60 build-in commands of ParticleGun class (see 60 build-in commands of ParticleGun class (see the macros provided with
61 this example). 61 this example).
62 62
63 4- PHYSICS 63 4- PHYSICS
64 64
65 The program computes and plots energy depos 65 The program computes and plots energy deposited in the interaction volume
66 (absorber) and the flux of particles leavin 66 (absorber) and the flux of particles leaving this volume.
67 Processes invoked and particles generated d 67 Processes invoked and particles generated during hadronic cascade are listed.
68 68
69 5- HISTOGRAMS 69 5- HISTOGRAMS
70 70
71 The test contains 24 built-in 1D histograms 71 The test contains 24 built-in 1D histograms:
72 72
73 1 "total energy deposit" 73 1 "total energy deposit"
74 2 "Edep (MeV/mm) profile along 74 2 "Edep (MeV/mm) profile along radius"
75 3 "total kinetic energy flow" 75 3 "total kinetic energy flow"
76 4 "energy spectrum of gamma at 76 4 "energy spectrum of gamma at creation"
77 5 "energy spectrum of e+- at c 77 5 "energy spectrum of e+- at creation"
78 6 "energy spectrum of neutrons 78 6 "energy spectrum of neutrons at creation"
79 7 "energy spectrum of protons 79 7 "energy spectrum of protons at creation"
80 8 "energy spectrum of deuteron 80 8 "energy spectrum of deuterons at creation"
81 9 "energy spectrum of alphas a 81 9 "energy spectrum of alphas at creation"
82 10 "energy spectrum of all othe 82 10 "energy spectrum of all others ions at creation"
83 11 "energy spectrum of all othe 83 11 "energy spectrum of all others baryons at creation"
84 12 "energy spectrum of all othe 84 12 "energy spectrum of all others mesons at creation"
85 13 "energy spectrum of all othe 85 13 "energy spectrum of all others leptons (neutrinos) at creation"
86 14 "energy spectrum of emerging 86 14 "energy spectrum of emerging gamma"
87 15 "energy spectrum of emerging 87 15 "energy spectrum of emerging e+-"
88 16 "energy spectrum of emerging 88 16 "energy spectrum of emerging neutrons"
89 17 "energy spectrum of emerging 89 17 "energy spectrum of emerging protons"
90 18 "energy spectrum of emerging 90 18 "energy spectrum of emerging deuterons"
91 19 "energy spectrum of emerging 91 19 "energy spectrum of emerging alphas"
92 20 "energy spectrum of all othe 92 20 "energy spectrum of all others emerging ions"
93 21 "energy spectrum of all othe 93 21 "energy spectrum of all others emerging baryons"
94 22 "energy spectrum of all othe 94 22 "energy spectrum of all others emerging mesons"
95 23 "energy spectrum of all othe 95 23 "energy spectrum of all others emerging leptons (neutrinos)"
96 24 "total energy released : ede 96 24 "total energy released : edep + eflow"
97 97
98 The histograms are managed by the HistoMana 98 The histograms are managed by the HistoManager class and its Messenger.
99 The histos can be individually activated wi 99 The histos can be individually activated with the command :
100 /analysis/h1/set id nbBins valMin valMax u 100 /analysis/h1/set id nbBins valMin valMax unit
101 where unit is the desired unit for the hist 101 where unit is the desired unit for the histo (MeV or keV, cm or mm, etc..)
102 102
103 One can control the name of the histograms 103 One can control the name of the histograms file with the command:
104 /analysis/setFileName name (default Hadr0 104 /analysis/setFileName name (default Hadr06)
105 105
106 It is possible to choose the format of the 106 It is possible to choose the format of the histogram file : root (default),
107 xml, csv, by using namespace in HistoManage 107 xml, csv, by using namespace in HistoManager.hh
108 108
109 It is also possible to print selected histo 109 It is also possible to print selected histograms on an ascii file:
110 /analysis/h1/setAscii id 110 /analysis/h1/setAscii id
111 All selected histos will be written on a fi 111 All selected histos will be written on a file name.ascii (default Hadr04)
112 112
113 6- VISUALIZATION 113 6- VISUALIZATION
114 114
115 The Visualization Manager is set in the mai 115 The Visualization Manager is set in the main().
116 The initialisation of the drawing is done v 116 The initialisation of the drawing is done via the commands
117 /vis/... in the macro vis.mac. To get visua 117 /vis/... in the macro vis.mac. To get visualisation:
118 > /control/execute vis.mac 118 > /control/execute vis.mac
119 119
120 The tracks are drawn at the end of event, a 120 The tracks are drawn at the end of event, and erased at the end of run.
121 gamma green 121 gamma green
122 neutron yellow 122 neutron yellow
123 negative particles (e-, ...) red 123 negative particles (e-, ...) red
124 positive particles (e+, ions, ...) blue 124 positive particles (e+, ions, ...) blue
125 125
126 7- HOW TO START ? 126 7- HOW TO START ?
127 127
128 Execute Hadr06 in 'batch' mode from macro f 128 Execute Hadr06 in 'batch' mode from macro files :
129 % Hadr06 run1.mac 129 % Hadr06 run1.mac
130 130
131 Execute Hadr06 in 'interactive mode' with v 131 Execute Hadr06 in 'interactive mode' with visualization :
132 % Hadr06 132 % Hadr06
133 Idle> control/execute vis.mac 133 Idle> control/execute vis.mac
134 .... 134 ....
135 Idle> type your commands 135 Idle> type your commands
136 .... 136 ....
137 Idle> exit 137 Idle> exit
138 138
139 Macros provided in this example: 139 Macros provided in this example:
140 - hadr06.in: macro used in Geant4 testing to <<
141 - graphite.mac: neutron,14 MeV, in graphite 140 - graphite.mac: neutron,14 MeV, in graphite
142 - run1.mac: neutron,14 MeV, in Li7 141 - run1.mac: neutron,14 MeV, in Li7
143 - singleFission.mac: single fission in U235 142 - singleFission.mac: single fission in U235
144 143
145 Macros to be run interactively: 144 Macros to be run interactively:
146 - debug.mac: water with thermal scattering 145 - debug.mac: water with thermal scattering
147 - fission.mac: U235 146 - fission.mac: U235
148 - vis.mac: To activate visualization 147 - vis.mac: To activate visualization
149 148