RE04/src/RE04PrimaryGeneratorAction.cc

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0026 /// \file runAndEvent/RE04/src/RE04PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the RE04PrimaryGeneratorAction class
0028 //
0029 //
0030 #include "RE04PrimaryGeneratorAction.hh"
0031
0032 #include "G4Event.hh"
0033 #include "G4ParticleDefinition.hh"
0034 #include "G4ParticleGun.hh"
0035 #include "G4ParticleTable.hh"
0036 #include "G4SystemOfUnits.hh"
0037 #include "Randomize.hh"
0038
0039 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0040 RE04PrimaryGeneratorAction::RE04PrimaryGeneratorAction()
0041   : G4VUserPrimaryGeneratorAction(), fParticleGun(0)
0042 {
0043   G4int n_particle = 1;
0044   fParticleGun = new G4ParticleGun(n_particle);
0045
0046   // default particle kinematic
0047   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0048   G4String particleName;
0049   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "mu-");
0050   fParticleGun->SetParticleDefinition(particle);
0051   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
0052   fParticleGun->SetParticlePosition(G4ThreeVector(-75. * cm, 0., 0.));
0053   fParticleGun->SetParticleEnergy(10. * GeV);
0054 }
0055
0056 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0057 RE04PrimaryGeneratorAction::~RE04PrimaryGeneratorAction()
0058 {
0059   delete fParticleGun;
0060 }
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0063 void RE04PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0064 {
0065   G4double y = 96.0 * cm * (G4UniformRand() - 0.5);
0066   fParticleGun->SetParticlePosition(G4ThreeVector(-75. * cm, y, 0.));
0067   fParticleGun->GeneratePrimaryVertex(anEvent);
0068 }