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25 //
26 /// \file electromagnetic/TestEm1/src/PrimaryG
27 /// \brief Implementation of the PrimaryGenera
28 //
29 //
30
31 //....oooOO0OOooo........oooOO0OOooo........oo
32 //....oooOO0OOooo........oooOO0OOooo........oo
33
34 #include "PrimaryGeneratorAction.hh"
35
36 #include "DetectorConstruction.hh"
37 #include "PrimaryGeneratorMessenger.hh"
38
39 #include "G4Event.hh"
40 #include "G4ParticleDefinition.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(1);
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->SetParticleMomentumDirection(G
71 fParticleGun->SetParticleEnergy(100 * MeV);
72 G4double position = 0. * cm;
73 if (front) position = -0.4999 * (fDetector->
74 fParticleGun->SetParticlePosition(G4ThreeVec
75 }
76
77 //....oooOO0OOooo........oooOO0OOooo........oo
78
79 void PrimaryGeneratorAction::GeneratePrimaries
80 {
81 // this function is called at the begining o
82 //
83 // randomize the beam, if requested.
84 if (fRndmBeam > 0.) {
85 G4ThreeVector oldPosition = fParticleGun->
86 G4double rbeam = 0.5 * (fDetector->GetSize
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 else
95 fParticleGun->GeneratePrimaryVertex(anEven
96 }
97
98 //....oooOO0OOooo........oooOO0OOooo........oo
99