shared/src/PrimaryGeneratorAction.cc

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0025 //
0026 /// \file PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028
0029 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0030 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0031
0032 #include "PrimaryGeneratorAction.hh"
0033
0034 #include "DetectorConstruction.hh"
0035
0036 #include "G4Event.hh"
0037 #include "G4ParticleDefinition.hh"
0038 #include "G4ParticleGun.hh"
0039 #include "G4ParticleTable.hh"
0040 #include "G4SystemOfUnits.hh"
0041
0042 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0043
0044 PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* dc) : fDetector(dc)
0045 {
0046   G4int n_particle = 1;
0047   fParticleGun = new G4ParticleGun(n_particle);
0048
0049   // default particle kinematic
0050
0051   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0052   G4String particleName;
0053   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "e-");
0054   fParticleGun->SetParticleDefinition(particle);
0055   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
0056   fParticleGun->SetParticleEnergy(500. * MeV);
0057   G4double position = -0.5 * (fDetector->GetWorldSizeX());
0058   fParticleGun->SetParticlePosition(G4ThreeVector(position, 0. * cm, 0. * cm));
0059 }
0060
0061 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0062
0063 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0064 {
0065   delete fParticleGun;
0066 }
0067
0068 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0069
0070 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0071 {
0072   // this function is called at the begining of event
0073   //
0074   fParticleGun->GeneratePrimaryVertex(anEvent);
0075 }
0076
0077 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......