GB04PrimaryGeneratorAction.cc

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// $Id$
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#include "GB04PrimaryGeneratorAction.hh"
#include "G4SystemOfUnits.hh"

#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "Randomize.hh"

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GB04PrimaryGeneratorAction::GB04PrimaryGeneratorAction()
 : G4VUserPrimaryGeneratorAction(),
   fParticleGun(0)
{
  G4int n_particle = 1;
  fParticleGun  = new G4ParticleGun(n_particle);

  // default particle kinematic
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4String particleName;
  G4ParticleDefinition* particle = particleTable->FindParticle(particleName="e-");
  fParticleGun->SetParticleDefinition(particle);
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
  fParticleGun->SetParticleEnergy(100.*MeV);
  fParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,-100*cm));
}

GB04PrimaryGeneratorAction::~GB04PrimaryGeneratorAction()
{
  delete fParticleGun;
}

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void GB04PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  fParticleGun->GeneratePrimaryVertex(anEvent);
}

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