Gabriele Cosmo
113 lines
4.4 KiB
C++
113 lines
4.4 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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//
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// $Id: ExN06PrimaryGeneratorAction.cc,v 1.6 2006/06/29 17:54:27 gunter Exp $
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// GEANT4 tag $Name: geant4-08-01 $
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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 "ExN06PrimaryGeneratorAction.hh"
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#include "ExN06PrimaryGeneratorMessenger.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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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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ExN06PrimaryGeneratorAction::ExN06PrimaryGeneratorAction()
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{
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G4int n_particle = 1;
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particleGun = new G4ParticleGun(n_particle);
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//create a messenger for this class
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gunMessenger = new ExN06PrimaryGeneratorMessenger(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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particleGun->SetParticleDefinition(particle);
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particleGun->SetParticleTime(0.0*ns);
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particleGun->SetParticlePosition(G4ThreeVector(0.0*cm,0.0*cm,0.0*cm));
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particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
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particleGun->SetParticleEnergy(500.0*keV);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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ExN06PrimaryGeneratorAction::~ExN06PrimaryGeneratorAction()
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{
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delete particleGun;
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delete gunMessenger;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void ExN06PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
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{
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particleGun->GeneratePrimaryVertex(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void ExN06PrimaryGeneratorAction::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 ExN06PrimaryGeneratorAction::SetOptPhotonPolar(G4double angle)
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{
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if (particleGun->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 = particleGun->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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particleGun->SetParticlePolarization(polar);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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