icsd/src/PrimaryGeneratorAction.cc

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0025 //
0026 /// \file PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028
0029 // This example is provided by the Geant4-DNA collaboration
0030 // Any report or published results obtained using the Geant4-DNA software
0031 // shall cite the following Geant4-DNA collaboration publication:
0032 // Med. Phys. 37 (2010) 4692-4708
0033 // J. Comput. Phys. 274 (2014) 841-882
0034 // The Geant4-DNA web site is available at http://geant4-dna.org
0035 //
0036 //
0037
0038 #include "PrimaryGeneratorAction.hh"
0039
0040 #include "G4LogicalVolumeStore.hh"
0041 #include "G4SystemOfUnits.hh"
0042 #include "G4Tubs.hh"
0043
0044 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0045
0046 PrimaryGeneratorAction::PrimaryGeneratorAction() : G4VUserPrimaryGeneratorAction()
0047 {
0048   G4int n_particle = 1;
0049   fpParticleGun = new G4ParticleGun(n_particle);
0050
0051   // default gun parameters
0052   fpParticleGun->SetParticleEnergy(500. * eV);
0053   fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
0054   fpParticleGun->SetParticlePosition(G4ThreeVector(-1.15 * nanometer, 0., 0));
0055 }
0056 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0057
0058 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0059 {
0060   delete fpParticleGun;
0061 }
0062
0063 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0064
0065 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0066 {
0067   G4Tubs* targetSolid =
0068     dynamic_cast<G4Tubs*>(G4LogicalVolumeStore::GetInstance()->GetVolume("Target")->GetSolid());
0069
0070   if (targetSolid != nullptr) {
0071     G4double radius = targetSolid->GetOuterRadius();
0072     fpParticleGun->SetParticlePosition(G4ThreeVector(-radius, 0., 0));
0073   }
0074
0075   fpParticleGun->GeneratePrimaryVertex(anEvent);
0076 }