Gabriele Cosmo
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
// This code implementation is the intellectual property of
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// the RD44 GEANT4 collaboration.
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//
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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 statement,
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// and all its terms.
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//
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// $Id: ExN02PrimaryGeneratorAction.cc,v 1.1 1999/01/07 16:05:49 gunter Exp $
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// GEANT4 tag $Name: geant4-00-01 $
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//
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//
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// $ Id: $
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//
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// From exampleEmPhys2/MyPrimaryGeneratorAction.cc,v 1.1 1998/02/06 maire
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#include "ExN02PrimaryGeneratorAction.hh"
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#include "ExN02DetectorConstruction.hh"
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#include "ExN02PrimaryGeneratorMessenger.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 "globals.hh"
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#include "Randomize.hh"
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ExN02PrimaryGeneratorAction::ExN02PrimaryGeneratorAction(ExN02DetectorConstruction* myDC)
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:myDetector(myDC),rndmFlag("off")
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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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gunMessenger = new ExN02PrimaryGeneratorMessenger(this);
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// default particle
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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="proton");
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particleGun->SetParticleDefinition(particle);
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particleGun->SetParticleMomentumDirection(G4ThreeVector(1.,0.,0.));
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particleGun->SetParticleEnergy(3.0*GeV);
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G4double position = -0.5*(myDetector->GetWorldFullLength());
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particleGun->SetParticlePosition(G4ThreeVector(position,0.*cm,0.*cm));
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}
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ExN02PrimaryGeneratorAction::~ExN02PrimaryGeneratorAction()
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{
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delete particleGun;
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delete gunMessenger;
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}
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void ExN02PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
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{
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// The Target is a box placed at (0,0,0)
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//
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G4double x0 = -0.5*(myDetector->GetTargetFullLength());
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G4double y0 = 0.*cm, z0 = 0.*cm;
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if (rndmFlag == "on")
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{y0 = (myDetector->GetTargetFullLength())*(G4UniformRand()-0.5);
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z0 = (myDetector->GetTargetFullLength())*(G4UniformRand()-0.5);
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}
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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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