Re: Model a crossing muon in a ccd cell

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Hello everyone,

I realized that it was better for me to use the GeneralParticleSource in order to simulate the radiative environment.

So here is my code :

------------------------------------------------

G4VPrimaryGenerator* PrimaryGeneratorAction::InitializeGPS()
{
  G4GeneralParticleSource* gps = new G4GeneralParticleSource();

  // setup details easier via UI commands see gps.mac

  // particle type
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* muon = particleTable->FindParticle("mu-");  
  gps->GetCurrentSource()->SetParticleDefinition(muon);

  // set energy distribution
  G4SPSEneDistribution* energy_distribution = gps->GetCurrentSource()->GetEneDist() ;
  energy_distribution->SetEnergyDisType("Mono"); // or gauss
  energy_distribution->SetMonoEnergy(10*MeV);

  // set position distribution
  G4SPSPosDistribution* position_distribution = gps->GetCurrentSource()->GetPosDist();
  position_distribution->SetPosDisType("Beam");  // or Point,Plane,Volume,Beam
  position_distribution->SetCentreCoords(G4ThreeVector(0.0*cm,0.0*cm,0.0*cm));
  position_distribution->SetBeamSigmaInX(0.0*mm);
  position_distribution->SetBeamSigmaInY(0.0*mm);

  // set angular distribution
  G4SPSAngDistribution* angular_distribution = gps->GetCurrentSource()->GetAngDist();
  angular_distribution->SetParticleMomentumDirection( G4ThreeVector(0., 0., 0.) );

  //valid options are:
  // iso, cos, user, planar, beam2d, beam1d
  angular_distribution->SetAngDistType("iso");
  angular_distribution->SetBeamSigmaInAngX(0.0*mrad);
  angular_distribution->SetBeamSigmaInAngY(0.0*mrad);
  angular_distribution->DefineAngRefAxes("angref1",G4ThreeVector(-1.,0.,0.));

  return gps;

}

------------------------------------------------

My question is how to modify the GPS in order to simulate a sphere (an isotropic source which contain a smaller detector) where particles are generated from and cross the inside in a random way ? And calculate the energy deposited in the detector by the particles which crossed the detector ?

Thank you in advance,

Pierre