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25 //
26 //
27 /// \file B3/B3b/src/PrimaryGeneratorAction.cc
28 /// \brief Implementation of the B3::PrimaryGeneratorAction class
29
30 #include "PrimaryGeneratorAction.hh"
31
32 #include "G4ChargedGeantino.hh"
33 #include "G4IonTable.hh"
34 #include "G4ParticleGun.hh"
35 #include "G4ParticleTable.hh"
36 #include "G4SystemOfUnits.hh"
37 #include "Randomize.hh"
38
39 namespace B3
40 {
41
42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43
44 PrimaryGeneratorAction::PrimaryGeneratorAction()
45 {
46 G4int n_particle = 1;
47 fParticleGun = new G4ParticleGun(n_particle);
48
49 // default particle kinematic
50
51 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
52 G4ParticleDefinition* particle = particleTable->FindParticle("chargedgeantino");
53 fParticleGun->SetParticleDefinition(particle);
54 fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));
55 fParticleGun->SetParticleEnergy(1 * eV);
56 fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
57 }
58
59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
60
61 PrimaryGeneratorAction::~PrimaryGeneratorAction()
62 {
63 delete fParticleGun;
64 }
65
66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67
68 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* event)
69 {
70 G4ParticleDefinition* particle = fParticleGun->GetParticleDefinition();
71 if (particle == G4ChargedGeantino::ChargedGeantino()) {
72 // fluorine
73 G4int Z = 9, A = 18;
74 G4double ionCharge = 0. * eplus;
75 G4double excitEnergy = 0. * keV;
76
77 G4ParticleDefinition* ion = G4IonTable::GetIonTable()->GetIon(Z, A, excitEnergy);
78 fParticleGun->SetParticleDefinition(ion);
79 fParticleGun->SetParticleCharge(ionCharge);
80 }
81
82 // randomized position
83 //
84 /// G4double x0 = 0*cm, y0 = 0*cm, z0 = 0*cm;
85 /// G4double dx0 = 0*cm, dy0 = 0*cm, dz0 = 0*cm;
86 G4double x0 = 4 * cm, y0 = 4 * cm, z0 = 4 * cm;
87 G4double dx0 = 1 * cm, dy0 = 1 * cm, dz0 = 1 * cm;
88 x0 += dx0 * (G4UniformRand() - 0.5);
89 y0 += dy0 * (G4UniformRand() - 0.5);
90 z0 += dz0 * (G4UniformRand() - 0.5);
91 fParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
92
93 // create vertex
94 //
95 fParticleGun->GeneratePrimaryVertex(event);
96 }
97
98 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
99
100 } // namespace B3
101