RE04/src/RE04PrimaryGeneratorAction.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 /// \file RE04PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the RE04PrimaryGeneratorAction class
0028
0029 #include "RE04PrimaryGeneratorAction.hh"
0030
0031 #include "G4Event.hh"
0032 #include "G4ParticleDefinition.hh"
0033 #include "G4ParticleGun.hh"
0034 #include "G4ParticleTable.hh"
0035 #include "G4SystemOfUnits.hh"
0036 #include "Randomize.hh"
0037
0038 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0039 RE04PrimaryGeneratorAction::RE04PrimaryGeneratorAction()
0040   : G4VUserPrimaryGeneratorAction(), fParticleGun(0)
0041 {
0042   G4int n_particle = 1;
0043   fParticleGun = new G4ParticleGun(n_particle);
0044
0045   // default particle kinematic
0046   G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
0047   G4String particleName;
0048   G4ParticleDefinition* particle = particleTable->FindParticle(particleName = "mu-");
0049   fParticleGun->SetParticleDefinition(particle);
0050   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
0051   fParticleGun->SetParticlePosition(G4ThreeVector(-75. * cm, 0., 0.));
0052   fParticleGun->SetParticleEnergy(10. * GeV);
0053 }
0054
0055 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0056 RE04PrimaryGeneratorAction::~RE04PrimaryGeneratorAction()
0057 {
0058   delete fParticleGun;
0059 }
0060
0061 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0062 void RE04PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0063 {
0064   G4double y = 96.0 * cm * (G4UniformRand() - 0.5);
0065   fParticleGun->SetParticlePosition(G4ThreeVector(-75. * cm, y, 0.));
0066   fParticleGun->GeneratePrimaryVertex(anEvent);
0067 }