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#include "G4BeamTestPrimaryGeneratorAction.h"
#include "G4BeamTestPrimaryGeneratorMessenger.h"
#include "Randomize.hh"
#include "G4Event.hh"
#include "G4GeneralParticleSource.hh"
#include "G4ParticleTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4SystemOfUnits.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4BeamTestPrimaryGeneratorAction::G4BeamTestPrimaryGeneratorAction()
: G4VUserPrimaryGeneratorAction(),
fParticleGun(0)
{
G4int n_particle = 1;
// fParticleGun = new G4GeneralParticleSource(n_particle);
fParticleGun = new G4GeneralParticleSource();
//create a messenger for this class
fGunMessenger = new G4BeamTestPrimaryGeneratorMessenger(this);
//default kinematic
//
G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
G4ParticleDefinition* particle = particleTable->FindParticle("mu-");
fParticleGun->SetParticleDefinition(particle);
fParticleGun->SetParticleTime(0.0*ns);
fParticleGun->SetParticlePosition(G4ThreeVector(-76.2*cm,0.0*cm,-21.59*cm));
//fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
//fParticleGun->SetParticleEnergy(2.0*GeV);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4BeamTestPrimaryGeneratorAction::~G4BeamTestPrimaryGeneratorAction()
{
delete fParticleGun;
delete fGunMessenger;
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4BeamTestPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
fParticleGun->GeneratePrimaryVertex(anEvent);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4BeamTestPrimaryGeneratorAction::SetOptPhotonPolar()
{
G4double angle = G4UniformRand() * 360.0*deg;
SetOptPhotonPolar(angle);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
void G4BeamTestPrimaryGeneratorAction::SetOptPhotonPolar(G4double angle)
{
if (fParticleGun->GetParticleDefinition()->GetParticleName()!="opticalphoton")
{
G4cout << "--> warning from PrimaryGeneratorAction::SetOptPhotonPolar() :"
"the particleGun is not an opticalphoton" << G4endl;
return;
}
G4ThreeVector normal (1., 0., 0.);
G4ThreeVector kphoton = fParticleGun->GetParticleMomentumDirection();
G4ThreeVector product = normal.cross(kphoton);
G4double modul2 = product*product;
G4ThreeVector e_perpend (0., 0., 1.);
if (modul2 > 0.) e_perpend = (1./std::sqrt(modul2))*product;
G4ThreeVector e_paralle = e_perpend.cross(kphoton);
G4ThreeVector polar = std::cos(angle)*e_paralle + std::sin(angle)*e_perpend;
fParticleGun->SetParticlePolarization(polar);
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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