Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/examples/extended/exoticphysics/dmparticle/src/PrimaryGeneratorAction.cc

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 25 //
 26 /// \file exoticphysics/dmparticle/src/PrimaryGeneratorAction.cc
 27 /// \brief Implementation of the PrimaryGeneratorAction class
 28 //
 29 
 30 #include "PrimaryGeneratorAction.hh"
 31 
 32 #include "DetectorConstruction.hh"
 33 #include "TestParameters.hh"
 34 
 35 #include "G4Event.hh"
 36 #include "G4ParticleDefinition.hh"
 37 #include "G4ParticleGun.hh"
 38 #include "G4SystemOfUnits.hh"
 39 
 40 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 41 
 42 PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* det)
 43   : G4VUserPrimaryGeneratorAction(), fDetector(det)
 44 {
 45   fParticleGun = new G4ParticleGun(1);
 46   fParticleGun->SetParticleEnergy(100 * GeV);
 47   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
 48 }
 49 
 50 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 51 
 52 PrimaryGeneratorAction::~PrimaryGeneratorAction()
 53 {
 54   delete fParticleGun;
 55 }
 56 
 57 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 58 
 59 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
 60 {
 61   // this function is called at the begining of event
 62   if (0 == anEvent->GetEventID()) {
 63     G4double z0 = -0.5 * (fDetector->GetWorldSizeZ()) + 1 * um;
 64     G4cout << "Event = " << anEvent->GetEventID() << "; z0 = " << z0;
 65     fParticleGun->SetParticlePosition(G4ThreeVector(0.0, 0.0, z0));
 66     G4cout << "  Primary direction = " << fParticleGun->GetParticleMomentumDirection() << G4endl;
 67     TestParameters* param = TestParameters::GetPointer();
 68     param->SetBeamParticle(fParticleGun->GetParticleDefinition());
 69     param->SetBeamEnergy(fParticleGun->GetParticleEnergy());
 70     param->SetPositionZ(z0);
 71   }
 72   fParticleGun->GeneratePrimaryVertex(anEvent);
 73 }
 74 
 75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 76