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ExN02PrimaryGeneratorAction.cc
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27 // $Id: ExN02PrimaryGeneratorAction.cc 69899 2013-05-17 10:05:33Z gcosmo $
28 //
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31 
32 #include "ExN02PrimaryGeneratorAction.hh"
33 #include "ExN02DetectorConstruction.hh"
34 
35 #include "G4Event.hh"
36 #include "G4ParticleGun.hh"
37 #include "G4ParticleTable.hh"
38 #include "G4ParticleDefinition.hh"
39 #include "globals.hh"
40 #include "G4SystemOfUnits.hh"
41 
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43 
44 ExN02PrimaryGeneratorAction::ExN02PrimaryGeneratorAction(
45  ExN02DetectorConstruction* myDC)
46 :myDetector(myDC)
47 {
48  G4int n_particle = 1;
49  particleGun = new G4ParticleGun(n_particle);
50 
51 // default particle
52 
53  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
54  G4ParticleDefinition* particle = particleTable->FindParticle("proton");
55 
56  particleGun->SetParticleDefinition(particle);
57  particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
58  particleGun->SetParticleEnergy(3.0*GeV);
59 }
60 
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62 
63 ExN02PrimaryGeneratorAction::~ExN02PrimaryGeneratorAction()
64 {
65  delete particleGun;
66 }
67 
68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
69 
70 void ExN02PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
71 {
72  G4double position = -0.5*(myDetector->GetWorldFullLength());
73  particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position));
74 
75  particleGun->GeneratePrimaryVertex(anEvent);
76 }
77 
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