| Geant4 Cross Reference |
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2 Geant4 - an Object-Oriented Toolkit for S
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4
5
6 HADR01
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8 A.Bagulya, I.Gudowska, V.Ivanchenk
9 CERN, Geneva, Switzerla
10 Karolinska Institute & Hospital, S
11 Lebedev Physical Institute, Mos
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13
14 This example application is based on the appli
15 simulation of proton or ion beam interaction w
16 aspects of beam target interaction are demonst
17 longitudinal profile of energy deposition, spe
18 spectra of particles leaving the target. The r
19 of average numbers and histograms.
20
21
22 GEOMETRY
23
24 The Target volume is a cylinder placed inside
25 Check volume is placed inside the World volume
26 the Check volume are 1 mm larger than the radi
27 The material of the Check volume is the same a
28 volume has the sizes 10 mm larger than that of
29 from the Geant4 database can be defined. The d
30 G4Galactic and the default Target material is
31 subdivided on number of equal slices. Followin
32 modify the geometry:
33
34 /testhadr/TargetMat G4_Pb
35 /testhadr/WorldMat G4_AIR
36 /testhadr/TargetRadius 10 mm
37 /testhadr/TargetLength 20 cm
38 /testhadr/NumberDivZ 200
39
40 Beam direction coincides with the target axis
41 coordinate system. The beam starts 5 mm in fro
42 is used as a primary generator. The energy and
43 defined via standard UI commands
44
45 /gun/energy 15 GeV
46 /gun/particle proton
47
48 Default beam position is -(targetHalfLength +
49 Beam position and direction can be changed by
50
51 /gun/position 1 10 3 mm
52 /gun/direction 1 0 0
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54 however, position command is active only if be
55
56 /testhadr/DefaultBeamPosition false
57
58 SCORING
59
60 The scoring is performed with the help of User
61 sensitive detector classes: one associated wi
62 the Check volume. Each secondary particle is s
63 the StackingAction it is also possible to kill
64 particles
65
66 /testhadr/Kill neutron
67 /testhadr/KillAllSecondaries
68
69 To control running the following options are a
70
71 /testhadr/PrintModulo 100
72 /testhadr/DebugEvent 977
73
74 The last command selects an events, for which
75 of printout is established.
76
77
78 PHYSICS
79
80 PhysicsList of the application uses reference
81 which are distributed with Geant4 in /geant4/p
82
83 The reference Physics List name may be defined
84 run command:
85
86 Hadr01 my.macro QGSP_BERT
87
88 If 3d argument is not set then the PHYSLIST en
89 If 3d argument is set, it is possible to add t
90 which defines overlap energies between cascade
91
92 Hadr01 my.macro QGSP_BERT 3.5 8.0
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94 If 6 arguments are used the last enabling addi
95 physics on top of any reference Physics List.
96
97 Hadr01 my.macro QGSP_BERT 3.5 8.0 CI
98
99 If both 3d argument and the environment variab
100 reference Phsyics Lists is not instantiated, i
101 is used built from components, which may be co
102 The choice of the physics is provided by the U
103
104 /testhadr/Physics QGSP_BIC
105
106 To see the list of available configurations wi
107
108 /testhadr/ListPhysics
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110 The cuts for electromagnetic physics can be es
111
112 /testhadr/CutsAll 1 mm
113 /testhadr/CutsGamma 0.1 mm
114 /testhadr/CutsEl 0.2 mm
115 /testhadr/CutsPos 0.3 mm
116 /testhadr/CutsProt 0.6 mm
117
118 Note that testhadr UI commands are not availab
119 environment variable is defined.
120
121
122 VISUALIZATION
123
124 For interactive mode G4 visualization options
125 defined, then the example should be recompiled
126
127 gmake visclean
128 gmake
129
130
131 HISTOGRAMS
132
133 There are built in histograms. The 1st one (id
134 deposition along the target. Histograms "22",
135 energy deposition per particle type.
136
137 All other histograms are provided in decimal l
138 where E is secondary particle energy at produc
139
140 It is possible to change scale and output file
141
142 /testhadr/histo/fileName name
143 /testhadr/histo/setHisto idx nbins vmin vmax u
144
145 Only ROOT histograms are available.
146
147 All histograms are normalized to the number of