GEANT4 - PrimaryGeneratorAction.cpp

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/// \file electromagnetic/TestEm5/src/PrimaryGeneratorAction.cc
/// \brief Implementation of the PrimaryGeneratorAction class
//
// $Id: PrimaryGeneratorAction.cc 77583 2013-11-26 10:28:15Z gcosmo $
//
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#include "PrimaryGeneratorAction.hh"

#include "DetectorConstruction.hh"
#include "PrimaryGeneratorMessenger.hh"

#include "G4Event.hh"
#include "G4ParticleTable.hh"

#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"
#include "G4AtomicTransitionManager.hh"
#include "G4VAtomDeexcitation.hh"

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PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* DC)
:G4VUserPrimaryGeneratorAction(),
 fParticleGun(0),fDetector(DC),fRndmBeam(0),fGunMessenger(0)
{
  G4int n_particle = 1;
 // fParticleGun  = new G4ParticleGun(n_particle);




  /// descomentar para GPS
    fParticleGun  = new G4GeneralParticleSource();
  SetDefaultKinematic();

  //create a messenger for this class
  fGunMessenger = new PrimaryGeneratorMessenger(this);

}

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PrimaryGeneratorAction::~PrimaryGeneratorAction()
{
  delete fParticleGun;
  delete fGunMessenger;
}

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void PrimaryGeneratorAction::SetDefaultKinematic()
{

    /// USANDO A NOVA BIBLOTECA G4AtomicTransitionManager


  // default particle kinematic
  //

  /// descomentar para GPS
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();

  //G4ParticleDefinition* particle
  //                  = particleTable->FindParticle("e-");


    /// descomentar para GPS
   G4ParticleDefinition* particle
    = G4ParticleTable::GetParticleTable()->FindParticle("gamma");


    /// descomentar para GPS
   fParticleGun->SetParticleDefinition(particle);
   G4SPSEneDistribution* eneDist = fParticleGun->GetCurrentSource()->GetEneDist();




   eneDist->SetMonoEnergy(15.0*keV);



    //eneDist->SetEnergyDisType("Brem");
    // 30 MeV Photonen
    // eneDist->SetTemp(7.00e10);
    //eneDist->SetEmax(30.0*keV);
    //eneDist->SetEmin(1.0*keV);
   // eneDist->SetTemp(7.00e7);


   // eneDist->SetEnergyDisType("Gauss");
   // eneDist->SetMonoEnergy(15*keV);
   // eneDist->SetBeamSigmaInE(5*keV);
   // eneDist->Calculate();

    //eneDist->SetMonoEnergy(30.0*keV);



/// descomentar para GPS
    G4SPSPosDistribution* posDist = fParticleGun->GetCurrentSource()->GetPosDist();
    posDist->SetPosDisType("Point");
    posDist->SetCentreCoords(G4ThreeVector(1.0*cm, -0.4142*cm ,0.*cm));
    G4SPSAngDistribution* angDist = fParticleGun->GetCurrentSource()->GetAngDist();

    /// descomentar para GPS
    angDist->SetParticleMomentumDirection(G4ParticleMomentum(-1.0*cm, 0.4142*cm ,0.*cm));
    // angDist->SetParticleMomentumDirection(G4ParticleMomentum(0.0*cm, 1.0*cm,0.*cm));



    //angDist->SetAngDistType("iso");



  /// modelo 3
  //fParticleGun -> SetParticleMomentumDirection(G4ThreeVector(5.4, 2.34,0.)); // cos 65
  // modelo 1
  //fParticleGun -> SetParticleMomentumDirection(G4ThreeVector(-0.25*cm, -0.0 ,0.)); // cos 65

  //fParticleGun -> SetParticleEnergy(energia_max *keV);






}

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void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  //this function is called at the begining of event
  //
  //randomize the beam, if requested.
  /*if (fRndmBeam > 0.)
    {

      G4ThreeVector oldPosition = fParticleGun->GetParticlePosition();
      G4double rbeam = 0.5*(fDetector->GetAbsorberSizeYZ())*fRndmBeam;
      G4double x0 = oldPosition.x();
      G4double y0 = oldPosition.y() + (2*G4UniformRand()-1.)*rbeam;
      G4double z0 = oldPosition.z() + (2*G4UniformRand()-1.)*rbeam;
      fParticleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
      fParticleGun->GeneratePrimaryVertex(anEvent);
      fParticleGun->SetParticlePosition(oldPosition);

    }
  else  */

      fParticleGun->GeneratePrimaryVertex(anEvent);
}

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