Geant4 Cross Reference

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Geant4/examples/basic/B3/B3a/src/PrimaryGeneratorAction.cc

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  1 //
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 25 //
 26 //
 27 /// \file B3/B3a/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