Gabriele Cosmo
142 lines
4.9 KiB
C++
142 lines
4.9 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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// $Id: G4NeutronKiller.hh,v 1.1 2006/11/17 15:53:04 vnivanch Exp $
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// GEANT4 tag $Name: geant4-09-01 $
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//
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//---------------------------------------------------------------------------
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//
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// ClassName: G4NeutronKiller
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//
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// Description: The process to kill neutrons to save CPU
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//
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// Author: V.Ivanchenko 26/09/00 for HARP software
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//
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//----------------------------------------------------------------------------
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//
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// Class description:
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//
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// G4NeutronKiller allows to remove unwanted neutrons from simulation in
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// order to improve CPU performance. There are two parameters:
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//
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// 1) low energy threshold for neutron kinetic energy (default 0)
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// 2) time limit for neutron track (default DBL_MAX)
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//
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// These parameters can be changed via Set methods or by UI commands:
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// /physics_engine/neutron/energyCut
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// /physics_engine/neutron/timeLimit
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//
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// If a neutron track is killed no energy deposition is added to the step
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#ifndef NeutronKiller_h
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#define NeutronKiller_h 1
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#include "globals.hh"
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#include "G4VDiscreteProcess.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4Step.hh"
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#include "G4Track.hh"
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class G4NeutronKillerMessenger;
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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class G4NeutronKiller : public G4VDiscreteProcess
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{
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public:
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G4NeutronKiller(const G4String& processName = "nKiller",
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G4ProcessType aType = fNotDefined);
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virtual ~G4NeutronKiller();
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G4bool IsApplicable(const G4ParticleDefinition&);
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void SetTimeLimit(G4double);
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void SetKinEnergyLimit(G4double);
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G4double PostStepGetPhysicalInteractionLength( const G4Track& track,
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G4double previousStepSize,
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G4ForceCondition* condition);
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G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
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G4double GetMeanFreePath(const G4Track&, G4double,G4ForceCondition*);
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private:
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// hide assignment operator as private
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G4NeutronKiller(const G4NeutronKiller&);
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G4NeutronKiller& operator = (const G4NeutronKiller &right);
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G4double kinEnergyThreshold;
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G4double timeThreshold;
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G4NeutronKillerMessenger* pMess;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4NeutronKiller::PostStepGetPhysicalInteractionLength(
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const G4Track& aTrack,
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G4double, G4ForceCondition* condition)
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{
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// condition is set to "Not Forced"
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*condition = NotForced;
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G4double limit = DBL_MAX;
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if(aTrack.GetGlobalTime() > timeThreshold ||
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aTrack.GetKineticEnergy() < kinEnergyThreshold) limit = 0.0;
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return limit;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4double G4NeutronKiller::GetMeanFreePath(const G4Track&,G4double,
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G4ForceCondition*)
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{
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return DBL_MAX;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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inline G4VParticleChange* G4NeutronKiller::PostStepDoIt(const G4Track& aTrack,
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const G4Step&)
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{
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pParticleChange->Initialize(aTrack);
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pParticleChange->ProposeTrackStatus(fStopAndKill);
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return pParticleChange;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#endif
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