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PrimaryGeneratorAction.cc
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27 // $Id: PrimaryGeneratorAction.cc,v 1.1 2007-06-21 15:18:32 jjacquem Exp $
28 // GEANT4 tag $Name: not supported by cvs2svn $
29 //
30 //
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34 
35 #include "PrimaryGeneratorAction.hh"
36 
37 #include "DetectorConstruction.hh"
38 
39 #include "G4Event.hh"
40 #include "G4ParticleTable.hh"
41 #include "G4ParticleDefinition.hh"
42 #include "G4SystemOfUnits.hh"
43 
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46 PrimaryGeneratorAction::PrimaryGeneratorAction( DetectorConstruction* DC)
47 :Detector(DC)
48 {
49  particleGun = new G4ParticleGun(1);
50  SetDefaultKinematic();
51 }
52 
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55 PrimaryGeneratorAction::~PrimaryGeneratorAction()
56 {
57  delete particleGun;
58 }
59 
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62 void PrimaryGeneratorAction::SetDefaultKinematic()
63 {
64  G4ParticleDefinition* particle
65  = G4ParticleTable::GetParticleTable()->FindParticle("e-");
66  particleGun->SetParticleDefinition(particle);
67  particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
68  particleGun->SetParticleEnergy(100*MeV);
69  G4double position = -0.5*(Detector->GetSize());
70  particleGun->SetParticlePosition(G4ThreeVector(position,0.*cm,0.*cm));
71 }
72 
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74 
75 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
76 {
77  //this function is called at the begining of event
78  //
79  particleGun->GeneratePrimaryVertex(anEvent);
80 }
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