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26 ////////////////////////////////////////////////////////////////////////////////
27 // Class: G4ContinuousGainOfEnergy
28 // Author: L. Desorgher
29 // Organisation: SpaceIT GmbH
30 //
31 // Continuous process acting on adjoint particles to compute the continuous
32 // gain of energy of charged particles when they are tracked back.
33 ////////////////////////////////////////////////////////////////////////////////
34
35 #ifndef G4ContinuousGainOfEnergy_h
36 #define G4ContinuousGainOfEnergy_h 1
37
38 #include "globals.hh"
39 #include "G4ProductionCutsTable.hh"
40 #include "G4VContinuousProcess.hh"
41
42 class G4Material;
43 class G4MaterialCutsCouple;
44 class G4ParticleChange;
45 class G4ParticleDefinition;
46 class G4Step;
47 class G4Track;
48 class G4VEmModel;
49 class G4VEnergyLossProcess;
50
51 class G4ContinuousGainOfEnergy : public G4VContinuousProcess
52 {
53 public:
54 explicit G4ContinuousGainOfEnergy(const G4String& name = "EnergyGain",
55 G4ProcessType type = fElectromagnetic);
56
57 ~G4ContinuousGainOfEnergy() override;
58
59 G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&) override;
60
61 void SetLossFluctuations(G4bool val);
62
63 inline void SetDirectEnergyLossProcess(G4VEnergyLossProcess* aProcess)
64 {
65 fDirectEnergyLossProcess = aProcess;
66 };
67
68 void SetDirectParticle(G4ParticleDefinition* p);
69
70 void ProcessDescription(std::ostream&) const override;
71 void DumpInfo() const override { ProcessDescription(G4cout); };
72
73 G4ContinuousGainOfEnergy(G4ContinuousGainOfEnergy&) = delete;
74 G4ContinuousGainOfEnergy& operator=(const G4ContinuousGainOfEnergy& right) =
75 delete;
76
77 protected:
78 G4double GetContinuousStepLimit(const G4Track& track,
79 G4double previousStepSize,
80 G4double currentMinimumStep,
81 G4double& currentSafety) override;
82
83 private:
84 void DefineMaterial(const G4MaterialCutsCouple* couple);
85 void SetDynamicMassCharge(const G4Track& track, G4double energy);
86
87 const G4Material* fCurrentMaterial = nullptr;
88 const G4MaterialCutsCouple* fCurrentCouple = nullptr;
89
90 G4VEmModel* fCurrentModel = nullptr;
91 G4VEnergyLossProcess* fDirectEnergyLossProcess = nullptr;
92 G4ParticleDefinition* fDirectPartDef = nullptr;
93
94 G4double fCurrentTcut = 0.;
95 G4double fPreStepKinEnergy = 1.;
96 G4double fLinLossLimit = 0.05;
97 G4double fMassRatio = 1.;
98
99 size_t fCurrentCoupleIndex = 9999999;
100
101 G4bool fIsIon = false;
102 G4bool fLossFluctuationFlag = true;
103 G4bool fLossFluctuationArePossible = true;
104 };
105
106 ///////////////////////////////////////////////////////
107 inline void G4ContinuousGainOfEnergy::DefineMaterial(
108 const G4MaterialCutsCouple* couple)
109 {
110 if(couple != fCurrentCouple)
111 {
112 fCurrentCouple = couple;
113 fCurrentMaterial = couple->GetMaterial();
114 fCurrentCoupleIndex = couple->GetIndex();
115
116 const std::vector<G4double>* aVec =
117 G4ProductionCutsTable::GetProductionCutsTable()->GetEnergyCutsVector(1);
118 fCurrentTcut = (*aVec)[fCurrentCoupleIndex];
119 }
120 }
121
122 #endif
123