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RE02PrimaryGeneratorAction.cc
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30 // $Id: RE02PrimaryGeneratorAction.cc 68026 2013-03-13 13:45:22Z gcosmo $
31 //
32 
34 
35 #include "G4Event.hh"
36 #include "G4ParticleGun.hh"
37 #include "G4ParticleTable.hh"
38 #include "G4ParticleDefinition.hh"
39 #include "Randomize.hh"
40 #include "globals.hh"
41 #include "G4SystemOfUnits.hh"
42 
43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
44 //
47  fParticleGun(0)
48 {
49  G4int n_particle = 1;
50  fParticleGun = new G4ParticleGun(n_particle);
51 
52 // default particle
54  G4ParticleDefinition* particle = particleTable->FindParticle("proton");
55  fParticleGun->SetParticleDefinition(particle);
56  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.0,0.0,1.));
57  fParticleGun->SetParticleEnergy(150.0*MeV);
58 //
59 // default beam position
60  G4double position = -200./2.*cm;
61 //
62 // Initial beam spot size in sigma.; This is not a part of ParticleGun.
63  fSigmaPosition = 10.* mm;
64 
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66 //
67  fParticleGun->SetParticlePosition(G4ThreeVector(0.*cm, 0.*cm, position));
68 }
69 
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
71 //
73 {
74  delete fParticleGun;
75 }
76 
77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
78 //
80 {
81 
82  G4ThreeVector position = fParticleGun->GetParticlePosition();
83  G4double dx = (G4UniformRand()-0.5)*fSigmaPosition;
84  G4double dy = (G4UniformRand()-0.5)*fSigmaPosition;
85  position.setX(dx);
86  position.setY(dy);
87  fParticleGun->SetParticlePosition(position);
88  fParticleGun->GeneratePrimaryVertex(anEvent);
89 }
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
static constexpr double mm
Definition: G4SIunits.hh:115
CLHEP::Hep3Vector G4ThreeVector
Definition of the RE02PrimaryGeneratorAction class.
void SetParticleMomentumDirection(G4ParticleMomentum aMomentumDirection)
G4ThreeVector GetParticlePosition()
int G4int
Definition: G4Types.hh:78
void setY(double)
virtual void GeneratePrimaryVertex(G4Event *evt)
void setX(double)
void SetParticlePosition(G4ThreeVector aPosition)
#define G4UniformRand()
Definition: Randomize.hh:97
virtual void GeneratePrimaries(G4Event *)
static constexpr double cm
Definition: G4SIunits.hh:119
void SetParticleEnergy(G4double aKineticEnergy)
static G4ParticleTable * GetParticleTable()
static constexpr double MeV
Definition: G4SIunits.hh:214
double G4double
Definition: G4Types.hh:76
void SetParticleDefinition(G4ParticleDefinition *aParticleDefinition)