| Geant4 Cross Reference |
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4 Geant4 - an Object-Oriented Toolkit for S
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6
7 field03
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9
10 Example of tracking in magnetic field wher
11 to selected logical volumes varies.
12
13 A global and a local magnetic field are de
14 the ConstructSDandField() method in the F0
15 using the G4FieldBuilder class.
16 The local magnetic field is set to the "Ra
17
18 The interactive commands, under the /field
19 the instantiation of G4FieldBuilder in the
20
21 1- GEOMETRY DEFINITION
22
23 The "Absorber" is a solid made of a given ma
24
25 Three parameters define the absorber :
26 - the material of the absorber,
27 - the thickness of an absorber,
28 - the transverse size of the absorber (the i
29
30 The volume "World" contains the "Absor
31 In this test the parameters of the "Wo
32
33 A transverse global uniform magnetic field
34 In addition, the "Radiator" volume, which is
35 to the absorber, has a local magnetic fiel
36
37 The default geometry is constructed in F03De
38 but all the parameters can be changed via
39 the commands defined in the F03DetectorMesse
40
41 2- AN EVENT : THE PRIMARY GENERATOR
42
43 The primary kinematic consists of a single p
44 absorber perpendicular to the input face. Th
45 and its energy are set in the F03PrimaryGene
46 be changed via the G4 build-in commands of G
47 the macros provided with this example).
48
49 It is also possible to change the position
50 or activate its randomization via the comm
51 F01PrimaryGeneratorMessenger class.
52
53 A RUN is a set of events.
54
55 3- DETECTOR RESPONSE
56
57 A HIT is a record, event per event , of all
58 informations needed to simulate and analyse
59
60 In this example a F03CalorHit is defined as
61 - the total energy deposit in the absorber,
62 - the total tracklength of all charged parti
63
64 Therefore the absorber is declared
65 'sensitive detector' (SD), see F03Calorimete
66
67 4- PHYSICS LIST
68
69 The particle's type and the physic proces
70 in this example are set in the FTFP_BERT
71 requires data files for electromagnetic a
72 See more on installation of the datasets
73
74 5- HOW TO START ?
75
76 - Execute field03 in 'batch' mode from macro
77 % ./field03 field03.in
78
79 - Execute field03 in 'interactive' mode with
80 % ./field03
81 ....
82 Idle> /run/beamOn 1
83 ....