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1 // 1
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25 //
26 /// \file PrimaryGeneratorAction.cc
27 /// \brief Implementation of the PrimaryGenera
28 //
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oo
31 //....oooOO0OOooo........oooOO0OOooo........oo
32
33 #include "PrimaryGeneratorAction.hh"
34
35 #include "DetectorConstruction.hh"
36 #include "PrimaryGeneratorMessenger.hh"
37
38 #include "G4Event.hh"
39 #include "G4ParticleDefinition.hh"
40 #include "G4ParticleGun.hh"
41 #include "G4ParticleTable.hh"
42 #include "G4SystemOfUnits.hh"
43 #include "Randomize.hh"
44
45 //....oooOO0OOooo........oooOO0OOooo........oo
46
47 PrimaryGeneratorAction::PrimaryGeneratorAction
48 {
49 fParticleGun = new G4ParticleGun(1);
50 SetDefaultKinematic();
51
52 // create a messenger for this class
53 fGunMessenger = new PrimaryGeneratorMessenge
54 }
55
56 //....oooOO0OOooo........oooOO0OOooo........oo
57
58 PrimaryGeneratorAction::~PrimaryGeneratorActio
59 {
60 delete fParticleGun;
61 delete fGunMessenger;
62 }
63
64 //....oooOO0OOooo........oooOO0OOooo........oo
65
66 void PrimaryGeneratorAction::SetDefaultKinemat
67 {
68 G4ParticleDefinition* particle = G4ParticleT
69 fParticleGun->SetParticleDefinition(particle
70 fParticleGun->SetParticleEnergy(10 * MeV);
71 fParticleGun->SetParticleMomentumDirection(G
72 G4double position = -0.45 * (fDetector->GetW
73 fParticleGun->SetParticlePosition(G4ThreeVec
74 }
75 //....oooOO0OOooo........oooOO0OOooo........oo
76
77 void PrimaryGeneratorAction::GeneratePrimaries
78 {
79 // this function is called at the begining o
80
81 // randomize the beam, if requested.
82 //
83 if (fRndmBeam > 0.) {
84 G4ThreeVector oldPosition = fParticleGun->
85 if (fRndmBeam > fDetector->GetAbsorSizeYZ(
86 G4double rbeam = 0.5 * fRndmBeam;
87 G4double x0 = oldPosition.x();
88 G4double y0 = oldPosition.y() + (2 * G4Uni
89 G4double z0 = oldPosition.z() + (2 * G4Uni
90 fParticleGun->SetParticlePosition(G4ThreeV
91 fParticleGun->GeneratePrimaryVertex(anEven
92 fParticleGun->SetParticlePosition(oldPosit
93 }
94
95 else
96 fParticleGun->GeneratePrimaryVertex(anEven
97
98 // randomize time zero of anEvent
99 //
100 G4double t0 = fTimeExposure * G4UniformRand(
101 anEvent->GetPrimaryVertex()->SetT0(t0);
102 }
103
104 //....oooOO0OOooo........oooOO0OOooo........oo
105