Gabriele Cosmo
117 lines
4.6 KiB
C++
117 lines
4.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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/// \file OpNovice/src/OpNovicePrimaryGeneratorAction.cc
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/// \brief Implementation of the OpNovicePrimaryGeneratorAction class
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//
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//
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "OpNovicePrimaryGeneratorAction.hh"
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#include "OpNovicePrimaryGeneratorMessenger.hh"
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#include "Randomize.hh"
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#include "G4Event.hh"
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#include "G4ParticleGun.hh"
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#include "G4ParticleTable.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4SystemOfUnits.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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OpNovicePrimaryGeneratorAction::OpNovicePrimaryGeneratorAction()
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: G4VUserPrimaryGeneratorAction(),
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fParticleGun(0)
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{
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G4int n_particle = 1;
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fParticleGun = new G4ParticleGun(n_particle);
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//create a messenger for this class
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fGunMessenger = new OpNovicePrimaryGeneratorMessenger(this);
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//default kinematic
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//
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G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
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G4ParticleDefinition* particle = particleTable->FindParticle("e+");
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fParticleGun->SetParticleDefinition(particle);
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fParticleGun->SetParticleTime(0.0*ns);
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fParticleGun->SetParticlePosition(G4ThreeVector(0.0*cm,0.0*cm,0.0*cm));
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fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
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fParticleGun->SetParticleEnergy(500.0*keV);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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OpNovicePrimaryGeneratorAction::~OpNovicePrimaryGeneratorAction()
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{
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delete fParticleGun;
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delete fGunMessenger;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void OpNovicePrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
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{
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fParticleGun->GeneratePrimaryVertex(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void OpNovicePrimaryGeneratorAction::SetOptPhotonPolar()
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{
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G4double angle = G4UniformRand() * 360.0*deg;
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SetOptPhotonPolar(angle);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void OpNovicePrimaryGeneratorAction::SetOptPhotonPolar(G4double angle)
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{
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if (fParticleGun->GetParticleDefinition()->GetParticleName()!="opticalphoton")
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{
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G4cout << "--> warning from PrimaryGeneratorAction::SetOptPhotonPolar() :"
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"the particleGun is not an opticalphoton" << G4endl;
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return;
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}
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G4ThreeVector normal (1., 0., 0.);
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G4ThreeVector kphoton = fParticleGun->GetParticleMomentumDirection();
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G4ThreeVector product = normal.cross(kphoton);
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G4double modul2 = product*product;
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G4ThreeVector e_perpend (0., 0., 1.);
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if (modul2 > 0.) e_perpend = (1./std::sqrt(modul2))*product;
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G4ThreeVector e_paralle = e_perpend.cross(kphoton);
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G4ThreeVector polar = std::cos(angle)*e_paralle + std::sin(angle)*e_perpend;
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fParticleGun->SetParticlePolarization(polar);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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