Hadr10/src/PrimaryGeneratorAction.cc

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0025 //
0026 /// \file PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028 //
0029 //
0030
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0033
0034 #include "PrimaryGeneratorAction.hh"
0035
0036 #include "G4Event.hh"
0037 #include "G4ParticleDefinition.hh"
0038 #include "G4ParticleGun.hh"
0039 #include "G4ParticleTable.hh"
0040 #include "G4SystemOfUnits.hh"
0041 #include "globals.hh"
0042
0043 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0044
0045 PrimaryGeneratorAction::PrimaryGeneratorAction()
0046   : G4VUserPrimaryGeneratorAction(), fParticleGun(nullptr)
0047 {
0048   G4int n_particle = 1;
0049   fParticleGun = new G4ParticleGun(n_particle);
0050   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0051   //***LOOKHERE*** Default particle, tau-, and energy, 500 GeV
0052   fParticleGun->SetParticleDefinition(particleTable->FindParticle("tau-"));
0053   fParticleGun->SetParticleEnergy(500.0 * GeV);
0054   SetGunPosition();
0055 }
0056
0057 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0058
0059 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0060 {
0061   delete fParticleGun;
0062 }
0063
0064 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0065
0066 void PrimaryGeneratorAction::SetGunPosition() const
0067 {
0068   // Shoot the particle from the origin
0069   fParticleGun->SetParticlePosition(G4ThreeVector(0.0, 0.0, 0.0));  //***LOOKHERE***
0070 }
0071
0072 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0073
0074 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0075 {
0076   G4ThreeVector v(1.0, 0.0, 0.0);  //***LOOKHERE*** default shoot along the x-axis
0077   fParticleGun->SetParticleMomentumDirection(v);
0078   fParticleGun->GeneratePrimaryVertex(anEvent);
0079 }
0080
0081 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......