Gabriele Cosmo
113 lines
4.3 KiB
C++
113 lines
4.3 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 eventgenerator/particleGun/src/PrimaryGeneratorAction1.cc
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/// \brief Implementation of the PrimaryGeneratorAction1 class
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//
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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 "PrimaryGeneratorAction1.hh"
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#include "PrimaryGeneratorAction.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 "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "Randomize.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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PrimaryGeneratorAction1::PrimaryGeneratorAction1(G4ParticleGun* gun)
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: fParticleGun(gun)
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{ }
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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PrimaryGeneratorAction1::~PrimaryGeneratorAction1()
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{ }
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void PrimaryGeneratorAction1::GeneratePrimaries(G4Event* anEvent)
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{
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const G4double r = 2*mm;
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const G4double zmax = 8*mm;
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//vertex 1 uniform on cylinder
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//
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G4double alpha = twopi*G4UniformRand(); //alpha uniform in (0, 2*pi)
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G4double ux = std::cos(alpha);
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G4double uy = std::sin(alpha);
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G4double z = zmax*(2*G4UniformRand() - 1); //z uniform in (-zmax, +zmax)
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fParticleGun->SetParticlePosition(G4ThreeVector(r*ux,r*uy,z));
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fParticleGun->SetParticleMomentumDirection(G4ThreeVector(ux,uy,0));
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fParticleGun->SetParticleEnergy(1*MeV);
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fParticleGun->GeneratePrimaryVertex(anEvent);
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//vertex 2 at opposite
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//
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alpha += pi;
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ux = std::cos(alpha);
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uy = std::sin(alpha);
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fParticleGun->SetParticlePosition(G4ThreeVector(r*ux,r*uy,z));
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//particle 2 at vertex 2
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//
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const G4double dalpha = 10*deg;
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ux = std::cos(alpha + dalpha);
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uy = std::sin(alpha + dalpha);
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fParticleGun->SetParticleMomentumDirection(G4ThreeVector(ux,uy,0));
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fParticleGun->SetParticleEnergy(1*keV);
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fParticleGun->GeneratePrimaryVertex(anEvent);
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//particle 3 at vertex 3 (same as vertex 2)
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//
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ux = std::cos(alpha - dalpha);
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uy = std::sin(alpha - dalpha);
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fParticleGun->SetParticleMomentumDirection(G4ThreeVector(ux,uy,0));
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fParticleGun->SetParticleEnergy(1*GeV);
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fParticleGun->GeneratePrimaryVertex(anEvent);
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// randomize time zero of anEvent
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//
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G4double tmin = 0*s, tmax = 10*s;
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G4double t0 = tmin + (tmax - tmin)*G4UniformRand();
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G4PrimaryVertex* aVertex = anEvent->GetPrimaryVertex();
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while (aVertex) {
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aVertex->SetT0(t0);
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aVertex = aVertex->GetNext();
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}
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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