Gabriele Cosmo
104 lines
4.1 KiB
C++
104 lines
4.1 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: Em3PrimaryGeneratorAction.cc,v 1.5 2001/10/22 10:58:57 maire Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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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 "Em3PrimaryGeneratorAction.hh"
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#include "Em3DetectorConstruction.hh"
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#include "Em3PrimaryGeneratorMessenger.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 "Randomize.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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Em3PrimaryGeneratorAction::Em3PrimaryGeneratorAction(
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Em3DetectorConstruction* Em3DC)
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:Em3Detector(Em3DC)
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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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SetDefaultKinematic();
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rndmBeam = 0.;
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//create a messenger for this class
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gunMessenger = new Em3PrimaryGeneratorMessenger(this);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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Em3PrimaryGeneratorAction::~Em3PrimaryGeneratorAction()
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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 Em3PrimaryGeneratorAction::SetDefaultKinematic()
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{
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G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
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G4String particleName;
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G4ParticleDefinition* particle
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= particleTable->FindParticle(particleName="e-");
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particleGun->SetParticleDefinition(particle);
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particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
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particleGun->SetParticleEnergy(1.*GeV);
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G4double position = -0.5*(Em3Detector->GetWorldSizeX());
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particleGun->SetParticlePosition(G4ThreeVector(position,0.*cm,0.*cm));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void Em3PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
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{
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//this function is called at the begining of event
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//
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//randomize the beam, if requested.
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if (rndmBeam > 0.)
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{
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G4ThreeVector oldPosition = particleGun->GetParticlePosition();
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G4double rbeam = 0.5*(Em3Detector->GetCalorSizeYZ())*rndmBeam;
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G4double x0 = oldPosition.x();
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G4double y0 = oldPosition.y() + (2*G4UniformRand()-1.)*rbeam;
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G4double z0 = oldPosition.z() + (2*G4UniformRand()-1.)*rbeam;
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particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
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particleGun->GeneratePrimaryVertex(anEvent);
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particleGun->SetParticlePosition(oldPosition);
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}
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else particleGun->GeneratePrimaryVertex(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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