Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/processes/transportation/include/G4NeutronKiller.hh

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  1 //
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 25 //
 26 //
 27 //---------------------------------------------------------------------------
 28 //
 29 // ClassName:   G4NeutronKiller
 30 //
 31 // Description: The process to kill neutrons to save CPU
 32 //
 33 // Author:      V.Ivanchenko 26/09/00 for HARP software
 34 //
 35 //----------------------------------------------------------------------------
 36 //
 37 // Class description:
 38 //
 39 // G4NeutronKiller allows to remove unwanted neutrons from simulation in 
 40 // order to improve CPU performance. There are two parameters:
 41 //                 
 42 // 1) low energy threshold for neutron kinetic energy (default 0)
 43 // 2) time limit for neutron track (default DBL_MAX) 
 44 // 
 45 // These parameters can be changed via Set methods or by UI commands:
 46 //   /physics_engine/neutron/energyCut
 47 //   /physics_engine/neutron/timeLimit
 48 //
 49 // If a neutron track is killed no energy deposition is added to the step 
 50 //
 51 
 52 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 53 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 54 
 55 #ifndef NeutronKiller_h
 56 #define NeutronKiller_h 1
 57 
 58 #include "globals.hh"
 59 #include "G4VDiscreteProcess.hh"
 60 #include "G4ParticleDefinition.hh"
 61 #include "G4Step.hh"
 62 #include "G4Track.hh"
 63 
 64 class G4NeutronKillerMessenger;
 65 
 66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 67 
 68 class G4NeutronKiller : public G4VDiscreteProcess
 69 {
 70 public:
 71 
 72   G4NeutronKiller(const G4String& processName = "nKiller",
 73       G4ProcessType   aType =  fGeneral );
 74 
 75   virtual ~G4NeutronKiller();
 76 
 77   virtual G4bool IsApplicable(const G4ParticleDefinition&);
 78 
 79   void  SetTimeLimit(G4double);
 80 
 81   void  SetKinEnergyLimit(G4double);
 82 
 83   virtual G4double PostStepGetPhysicalInteractionLength( const G4Track& track,
 84                G4double previousStepSize,
 85                G4ForceCondition* condition);
 86 
 87   virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
 88 
 89   virtual G4double GetMeanFreePath(const G4Track&, G4double,G4ForceCondition*);
 90 
 91 private:
 92 
 93   // hide assignment operator as private
 94   G4NeutronKiller(const G4NeutronKiller&);
 95   G4NeutronKiller& operator = (const G4NeutronKiller &right);
 96 
 97   G4double kinEnergyThreshold;
 98   G4double timeThreshold;
 99      
100   G4NeutronKillerMessenger* pMess;
101 };
102 
103 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
104 
105 #endif
106 
107