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25 //
26 /// \file medical/fanoCavity/src/PrimaryGenera
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 "G4PhysicalConstants.hh"
43 #include "G4SystemOfUnits.hh"
44 #include "Randomize.hh"
45
46 //....oooOO0OOooo........oooOO0OOooo........oo
47
48 PrimaryGeneratorAction::PrimaryGeneratorAction
49 : fParticleGun(0), fDetector(det), fGunMesse
50 {
51 fParticleGun = new G4ParticleGun(1);
52 G4ParticleDefinition* particle = G4ParticleT
53 fParticleGun->SetParticleDefinition(particle
54 fParticleGun->SetParticleEnergy(1.25 * MeV);
55 fParticleGun->SetParticleMomentumDirection(G
56
57 fRBeam = 1.;
58
59 // create a messenger for this class
60 fGunMessenger = new PrimaryGeneratorMessenge
61 }
62
63 //....oooOO0OOooo........oooOO0OOooo........oo
64
65 PrimaryGeneratorAction::~PrimaryGeneratorActio
66 {
67 delete fParticleGun;
68 delete fGunMessenger;
69 }
70
71 //....oooOO0OOooo........oooOO0OOooo........oo
72
73 void PrimaryGeneratorAction::GeneratePrimaries
74 {
75 // this function is called at the begining o
76 //
77 G4double z0 = -0.5 * (fDetector->GetTotalThi
78 G4double x0 = 0. * cm, y0 = 0. * cm;
79
80 // beam width
81 //
82 if (fRBeam > 0.) {
83 G4double beam = fRBeam * (fDetector->GetWa
84 G4double r = beam * std::sqrt(G4UniformRan
85 G4double theta = twopi * G4UniformRand();
86 x0 = r * std::cos(theta);
87 y0 = r * std::sin(theta);
88 }
89 fParticleGun->SetParticlePosition(G4ThreeVec
90 fParticleGun->GeneratePrimaryVertex(anEvent)
91 }
92
93 //....oooOO0OOooo........oooOO0OOooo........oo
94