P01/src/ExP01PrimaryGeneratorAction.cc

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0025 //
0026 /// \file persistency/P01/src/ExP01PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the ExP01PrimaryGeneratorAction class
0028 //
0029 //
0030 //
0031 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0032 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0033
0034 #include "ExP01PrimaryGeneratorAction.hh"
0035
0036 #include "ExP01DetectorConstruction.hh"
0037
0038 #include "G4Event.hh"
0039 #include "G4ParticleDefinition.hh"
0040 #include "G4ParticleGun.hh"
0041 #include "G4ParticleTable.hh"
0042 #include "G4SystemOfUnits.hh"
0043 #include "globals.hh"
0044
0045 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0046
0047 ExP01PrimaryGeneratorAction::ExP01PrimaryGeneratorAction(ExP01DetectorConstruction* myDC)
0048   : G4VUserPrimaryGeneratorAction(), fParticleGun(0), fMyDetector(myDC)
0049 {
0050   G4int n_particle = 1;
0051   fParticleGun = new G4ParticleGun(n_particle);
0052
0053   // default particle
0054
0055   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0056   G4ParticleDefinition* particle = particleTable->FindParticle("proton");
0057
0058   fParticleGun->SetParticleDefinition(particle);
0059   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0060   fParticleGun->SetParticleEnergy(3.0 * GeV);
0061 }
0062
0063 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0064
0065 ExP01PrimaryGeneratorAction::~ExP01PrimaryGeneratorAction()
0066 {
0067   delete fParticleGun;
0068 }
0069
0070 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0071
0072 void ExP01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0073 {
0074   G4double position = -0.5 * (fMyDetector->GetWorldFullLength());
0075   fParticleGun->SetParticlePosition(G4ThreeVector(0. * cm, 0. * cm, position));
0076
0077   fParticleGun->GeneratePrimaryVertex(anEvent);
0078 }
0079
0080 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......