Gabriele Cosmo
79 lines
3.1 KiB
C++
79 lines
3.1 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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// $Id: PrimaryGeneratorAction.cc,v 1.1 2004/06/14 10:09:27 maire Exp $
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// GEANT4 tag $Name: geant4-06-02 $
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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 "PrimaryGeneratorAction.hh"
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#include "DetectorConstruction.hh"
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#include "G4Event.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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PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* det)
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:detector(det)
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{
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particleGun = new G4ParticleGun(1);
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G4ParticleDefinition* particle
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= G4ParticleTable::GetParticleTable()->FindParticle("mu+");
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particleGun->SetParticleDefinition(particle);
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particleGun->SetParticleEnergy(10*TeV);
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particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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PrimaryGeneratorAction::~PrimaryGeneratorAction()
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{
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delete particleGun;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void PrimaryGeneratorAction::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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G4double halfSize = 0.5*(detector->GetSize());
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G4double x0 = - halfSize;
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//randomize (y0,z0)
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//
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G4double beam = 0.8*halfSize;
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G4double y0 = (2*G4UniformRand()-1.)*beam;
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G4double z0 = (2*G4UniformRand()-1.)*beam;
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particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
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particleGun->GeneratePrimaryVertex(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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