| Geant4 Cross Reference |
1 // 1
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25 //
26 //
27 /// \file B2/B2b/src/PrimaryGeneratorAction.cc
28 /// \brief Implementation of the B2::PrimaryGe
29
30 #include "PrimaryGeneratorAction.hh"
31
32 #include "G4Box.hh"
33 #include "G4LogicalVolume.hh"
34 #include "G4LogicalVolumeStore.hh"
35 #include "G4ParticleGun.hh"
36 #include "G4ParticleTable.hh"
37 #include "G4SystemOfUnits.hh"
38 #include "globals.hh"
39
40 namespace B2
41 {
42
43 //....oooOO0OOooo........oooOO0OOooo........oo
44
45 PrimaryGeneratorAction::PrimaryGeneratorAction
46 {
47 G4int nofParticles = 1;
48 fParticleGun = new G4ParticleGun(nofParticle
49
50 // default particle kinematic
51
52 G4ParticleDefinition* particleDefinition =
53 G4ParticleTable::GetParticleTable()->FindP
54
55 fParticleGun->SetParticleDefinition(particle
56 fParticleGun->SetParticleMomentumDirection(G
57 fParticleGun->SetParticleEnergy(3.0 * GeV);
58 }
59
60 //....oooOO0OOooo........oooOO0OOooo........oo
61
62 PrimaryGeneratorAction::~PrimaryGeneratorActio
63 {
64 delete fParticleGun;
65 }
66
67 //....oooOO0OOooo........oooOO0OOooo........oo
68
69 void PrimaryGeneratorAction::GeneratePrimaries
70 {
71 // This function is called at the begining o
72
73 // In order to avoid dependence of PrimaryGe
74 // on DetectorConstruction class we get worl
75 // from G4LogicalVolumeStore.
76
77 G4double worldZHalfLength = 0;
78 G4LogicalVolume* worldLV = G4LogicalVolumeSt
79 G4Box* worldBox = nullptr;
80 if (worldLV) worldBox = dynamic_cast<G4Box*>
81 if (worldBox)
82 worldZHalfLength = worldBox->GetZHalfLengt
83 else {
84 G4cerr << "World volume of box not found."
85 G4cerr << "Perhaps you have changed geomet
86 G4cerr << "The gun will be place in the ce
87 }
88
89 // Starting a primary particle close to the
90 //
91 fParticleGun->SetParticlePosition(G4ThreeVec
92
93 fParticleGun->GeneratePrimaryVertex(event);
94 }
95
96 //....oooOO0OOooo........oooOO0OOooo........oo
97
98 } // namespace B2
99