PrimaryGeneratorAction.cc

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// $Id: PrimaryGeneratorAction.cc 66241 2012-12-13 18:34:42Z gunter $
//
// 

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#include "PrimaryGeneratorAction.hh"

#include "DetectorConstruction.hh"

#include "G4Event.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"

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PrimaryGeneratorAction::PrimaryGeneratorAction( DetectorConstruction* DC)
:Detector(DC)                                          
{
  particleGun  = new G4ParticleGun(1);
  SetDefaultKinematic();
}

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PrimaryGeneratorAction::~PrimaryGeneratorAction()
{
  delete particleGun;
}

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void PrimaryGeneratorAction::SetDefaultKinematic()
{
  G4ParticleDefinition* particle
           = G4ParticleTable::GetParticleTable()->FindParticle("e-");
  particleGun->SetParticleDefinition(particle);
  particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
  particleGun->SetParticleEnergy(100*MeV);
  G4double position = -0.5*(Detector->GetSize());
  particleGun->SetParticlePosition(G4ThreeVector(position,0.*cm,0.*cm));
}

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void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  //this function is called at the begining of event
  //
  particleGun->GeneratePrimaryVertex(anEvent); 
}

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