| Geant4 Cross Reference |
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25 //
26 //---------------------------------------------------------------
27 //
28 // G4ChannelingOptrChangeCrossSection
29 // Based On GB01BOptrChangeCrossSection
30 // Class Description:
31 // A G4VBiasingOperator concrete implementation example to
32 // illustrate how to bias physics processes cross-section for
33 // one particle type.
34 // The G4VBiasingOperation G4BOptnChangeCrossSection is
35 // selected by this operator, and is sent to each process
36 // calling the operator.
37 // A simple constant bias to the cross-section is applied,
38 // but more sophisticated changes can be applied.
39 //
40 //---------------------------------------------------------------
41 //
42
43 #ifndef G4ChannelingOptrChangeCrossSection_hh
44 #define G4ChannelingOptrChangeCrossSection_hh 1
45
46 #include "G4VBiasingOperator.hh"
47 class G4BOptnChangeCrossSection;
48 class G4ParticleDefinition;
49 #include <map>
50 #include <unordered_map>
51
52 enum G4ChannelingDensityRatio{
53 fDensityRatioNotDefined = -1,
54 fDensityRatioNone = 0,
55 fDensityRatioNuDElD = 1,
56 fDensityRatioNuD = 2,
57 fDensityRatioElD = 3
58 };
59
60 class G4ChannelingOptrChangeCrossSection : public G4VBiasingOperator {
61 public:
62 // ------------------------------------------------------------
63 // -- Constructor: takes the name of the particle type to bias:
64 // ------------------------------------------------------------
65 G4ChannelingOptrChangeCrossSection(const G4String& particleToBias,
66 const G4String& name = "ChannelingChangeXS");
67 virtual ~G4ChannelingOptrChangeCrossSection();
68 virtual void StartRun();
69
70 private:
71 G4int fChannelingID;
72
73 private:
74 virtual G4VBiasingOperation*
75 ProposeOccurenceBiasingOperation(const G4Track* track,
76 const G4BiasingProcessInterface* callingProcess);
77 virtual G4VBiasingOperation*
78 ProposeFinalStateBiasingOperation(const G4Track*, const G4BiasingProcessInterface*)
79 {return 0;}
80 virtual G4VBiasingOperation*
81 ProposeNonPhysicsBiasingOperation(const G4Track*, const G4BiasingProcessInterface*)
82 {return 0;}
83
84 private:
85 using G4VBiasingOperator::OperationApplied;
86 virtual void OperationApplied( const G4BiasingProcessInterface* callingProcess,
87 G4BiasingAppliedCase biasingCase,
88 G4VBiasingOperation* occurenceOperationApplied,
89 G4double weightForOccurenceInteraction,
90 G4VBiasingOperation* finalStateOperationApplied,
91 const G4VParticleChange* particleChangeProduced );
92
93 private:
94 std::map< const G4BiasingProcessInterface*,
95 G4BOptnChangeCrossSection* > fChangeCrossSectionOperations;
96 G4bool fSetup;
97 const G4ParticleDefinition* fParticleToBias;
98
99 private:
100 std::unordered_map<std::string,G4ChannelingDensityRatio> fProcessToDensity;
101 };
102
103 #endif
104