Gabriele Cosmo
84 lines
3.5 KiB
C++
84 lines
3.5 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 RE02PrimaryGeneratorAction.cc
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/// \brief Implementation of the RE02PrimaryGeneratorAction class
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#include "RE02PrimaryGeneratorAction.hh"
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#include "G4Event.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4ParticleGun.hh"
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#include "G4ParticleTable.hh"
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#include "G4SystemOfUnits.hh"
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#include "Randomize.hh"
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#include "globals.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//
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RE02PrimaryGeneratorAction::RE02PrimaryGeneratorAction()
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: G4VUserPrimaryGeneratorAction(), 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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// default particle
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G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
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G4ParticleDefinition* particle = particleTable->FindParticle("proton");
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fParticleGun->SetParticleDefinition(particle);
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fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.0, 0.0, 1.));
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fParticleGun->SetParticleEnergy(150.0 * MeV);
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//
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// default beam position
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G4double position = -200. / 2. * cm;
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//
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// Initial beam spot size in sigma.; This is not a part of ParticleGun.
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fSigmaPosition = 10. * mm;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//
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fParticleGun->SetParticlePosition(G4ThreeVector(0. * cm, 0. * cm, position));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//
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RE02PrimaryGeneratorAction::~RE02PrimaryGeneratorAction()
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{
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delete fParticleGun;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//
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void RE02PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
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{
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G4ThreeVector position = fParticleGun->GetParticlePosition();
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G4double dx = (G4UniformRand() - 0.5) * fSigmaPosition;
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G4double dy = (G4UniformRand() - 0.5) * fSigmaPosition;
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position.setX(dx);
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position.setY(dy);
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fParticleGun->SetParticlePosition(position);
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fParticleGun->GeneratePrimaryVertex(anEvent);
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}
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