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25 // 25 //
>> 26 // $Id: G4NeutronKiller.hh,v 1.1 2006/11/17 15:53:04 vnivanch Exp $
>> 27 // GEANT4 tag $Name: geant4-08-03-patch-01 $
26 // 28 //
27 //-------------------------------------------- 29 //---------------------------------------------------------------------------
28 // 30 //
29 // ClassName: G4NeutronKiller 31 // ClassName: G4NeutronKiller
30 // 32 //
31 // Description: The process to kill neutrons t 33 // Description: The process to kill neutrons to save CPU
32 // 34 //
33 // Author: V.Ivanchenko 26/09/00 for HARP 35 // Author: V.Ivanchenko 26/09/00 for HARP software
34 // 36 //
35 //-------------------------------------------- 37 //----------------------------------------------------------------------------
36 // 38 //
37 // Class description: 39 // Class description:
38 // 40 //
39 // G4NeutronKiller allows to remove unwanted n 41 // G4NeutronKiller allows to remove unwanted neutrons from simulation in
40 // order to improve CPU performance. There are 42 // order to improve CPU performance. There are two parameters:
41 // 43 //
42 // 1) low energy threshold for neutron kinetic 44 // 1) low energy threshold for neutron kinetic energy (default 0)
43 // 2) time limit for neutron track (default DB 45 // 2) time limit for neutron track (default DBL_MAX)
44 // 46 //
45 // These parameters can be changed via Set met 47 // These parameters can be changed via Set methods or by UI commands:
46 // /physics_engine/neutron/energyCut 48 // /physics_engine/neutron/energyCut
47 // /physics_engine/neutron/timeLimit 49 // /physics_engine/neutron/timeLimit
48 // 50 //
49 // If a neutron track is killed no energy depo 51 // If a neutron track is killed no energy deposition is added to the step
50 // 52 //
51 53
52 //....oooOO0OOooo........oooOO0OOooo........oo 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
53 //....oooOO0OOooo........oooOO0OOooo........oo 55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
54 56
55 #ifndef NeutronKiller_h 57 #ifndef NeutronKiller_h
56 #define NeutronKiller_h 1 58 #define NeutronKiller_h 1
57 59
58 #include "globals.hh" 60 #include "globals.hh"
59 #include "G4VDiscreteProcess.hh" 61 #include "G4VDiscreteProcess.hh"
60 #include "G4ParticleDefinition.hh" 62 #include "G4ParticleDefinition.hh"
61 #include "G4Step.hh" 63 #include "G4Step.hh"
62 #include "G4Track.hh" 64 #include "G4Track.hh"
63 65
64 class G4NeutronKillerMessenger; 66 class G4NeutronKillerMessenger;
65 67
66 //....oooOO0OOooo........oooOO0OOooo........oo 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
67 69
68 class G4NeutronKiller : public G4VDiscreteProc 70 class G4NeutronKiller : public G4VDiscreteProcess
69 { 71 {
70 public: 72 public:
71 73
72 G4NeutronKiller(const G4String& processName 74 G4NeutronKiller(const G4String& processName = "nKiller",
73 G4ProcessType aType = fGeneral ); << 75 G4ProcessType aType = fNotDefined);
74 76
75 virtual ~G4NeutronKiller(); 77 virtual ~G4NeutronKiller();
76 78
77 virtual G4bool IsApplicable(const G4Particle << 79 G4bool IsApplicable(const G4ParticleDefinition&);
78 80
79 void SetTimeLimit(G4double); 81 void SetTimeLimit(G4double);
80 82
81 void SetKinEnergyLimit(G4double); 83 void SetKinEnergyLimit(G4double);
82 84
83 virtual G4double PostStepGetPhysicalInteract << 85 G4double PostStepGetPhysicalInteractionLength( const G4Track& track,
84 G4double previousStepSize, << 86 G4double previousStepSize,
85 G4ForceCondition* condition); << 87 G4ForceCondition* condition);
86 88
87 virtual G4VParticleChange* PostStepDoIt(cons << 89 G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
88 90
89 virtual G4double GetMeanFreePath(const G4Tra << 91 G4double GetMeanFreePath(const G4Track&, G4double,G4ForceCondition*);
90 92
91 private: 93 private:
92 94
93 // hide assignment operator as private 95 // hide assignment operator as private
94 G4NeutronKiller(const G4NeutronKiller&); 96 G4NeutronKiller(const G4NeutronKiller&);
95 G4NeutronKiller& operator = (const G4Neutron 97 G4NeutronKiller& operator = (const G4NeutronKiller &right);
96 98
97 G4double kinEnergyThreshold; 99 G4double kinEnergyThreshold;
98 G4double timeThreshold; 100 G4double timeThreshold;
99 101
100 G4NeutronKillerMessenger* pMess; 102 G4NeutronKillerMessenger* pMess;
101 }; 103 };
>> 104
>> 105 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 106
>> 107 inline G4double G4NeutronKiller::PostStepGetPhysicalInteractionLength(
>> 108 const G4Track& aTrack,
>> 109 G4double, G4ForceCondition* condition)
>> 110 {
>> 111 // condition is set to "Not Forced"
>> 112 *condition = NotForced;
>> 113
>> 114 G4double limit = DBL_MAX;
>> 115 if(aTrack.GetGlobalTime() > timeThreshold ||
>> 116 aTrack.GetKineticEnergy() < kinEnergyThreshold) limit = 0.0;
>> 117 return limit;
>> 118 }
>> 119
>> 120 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 121
>> 122 inline G4double G4NeutronKiller::GetMeanFreePath(const G4Track&,G4double,
>> 123 G4ForceCondition*)
>> 124 {
>> 125 return DBL_MAX;
>> 126 }
>> 127
>> 128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
>> 129
>> 130 inline G4VParticleChange* G4NeutronKiller::PostStepDoIt(const G4Track& aTrack,
>> 131 const G4Step&)
>> 132 {
>> 133 pParticleChange->Initialize(aTrack);
>> 134 pParticleChange->ProposeTrackStatus(fStopAndKill);
>> 135 return pParticleChange;
>> 136 }
102 137
103 //....oooOO0OOooo........oooOO0OOooo........oo 138 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
104 139
105 #endif 140 #endif
106 141
107 142