Geant4  9.6.p02
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PrimaryGeneratorAction.cc
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30 // $Id$
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35 
36 #include "PrimaryGeneratorAction.hh"
37 
38 #include "DetectorConstruction.hh"
39 
40 #include "G4Event.hh"
41 #include "G4ParticleGun.hh"
42 #include "G4ParticleTable.hh"
43 #include "G4ParticleDefinition.hh"
44 #include "G4SystemOfUnits.hh"
45 
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48 PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* DC)
49 :fDetector(DC)
50 {
51  G4int n_particle = 1;
52  fParticleGun = new G4ParticleGun(n_particle);
53 
54  // default particle kinematic
55 
56  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
57  G4String particleName;
58  G4ParticleDefinition* particle
59  = particleTable->FindParticle(particleName="e-");
60  fParticleGun->SetParticleDefinition(particle);
61  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
62  fParticleGun->SetParticleEnergy(500.*MeV);
63  G4double position = -0.5*(fDetector->GetWorldSizeX());
64  fParticleGun->SetParticlePosition(G4ThreeVector(position,0.*cm,0.*cm));
65 
66 }
67 
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70 PrimaryGeneratorAction::~PrimaryGeneratorAction()
71 {
72  delete fParticleGun;
73 }
74 
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77 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
78 {
79  //this function is called at the begining of event
80  //
81  fParticleGun->GeneratePrimaryVertex(anEvent);
82 }
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