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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4DynamicParticleIonisation
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 23.08.2024
37 //
38 //
39 // Class Description:
40 //
41 // This class manages the ionisation process for any heavy charged
42 // particle on-the-fly, using only G4DynamicParticle data, whereas the
43 // G4ParticleDefinition object is not used.
44 //
45 // -------------------------------------------------------------------
46 //
47
48 #ifndef G4DynamicParticleIonisation_h
49 #define G4DynamicParticleIonisation_h 1
50
51 #include "G4VContinuousDiscreteProcess.hh"
52 #include "G4ParticleChangeForLoss.hh"
53 #include "G4EmSecondaryParticleType.hh"
54 #include "globals.hh"
55 #include <vector>
56
57 class G4Track;
58 class G4Step;
59 class G4ParticleDefinition;
60 class G4MaterialCutsCouple;
61 class G4Material;
62 class G4LossTableManager;
63 class G4VEmFluctuationModel;
64
65 class G4DynamicParticleIonisation : public G4VContinuousDiscreteProcess
66 {
67 public:
68
69 G4DynamicParticleIonisation();
70
71 ~G4DynamicParticleIonisation() override;
72
73 // initialisation
74 void BuildPhysicsTable(const G4ParticleDefinition&) override;
75
76 // Step limit from AlongStep
77 G4double AlongStepGetPhysicalInteractionLength(
78 const G4Track&,
79 G4double previousStepSize,
80 G4double currentMinimumStep,
81 G4double& currentSafety,
82 G4GPILSelection* selection) override;
83
84 // Step limit from cross section
85 G4double PostStepGetPhysicalInteractionLength(
86 const G4Track& track,
87 G4double previousStepSize,
88 G4ForceCondition* condition) override;
89
90 // AlongStep computations
91 G4VParticleChange* AlongStepDoIt(const G4Track&, const G4Step&) override;
92
93 // PostStep sampling of secondaries
94 G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&) override;
95
96
97 // implementation of the pure virtual method
98 G4double GetMeanFreePath(const G4Track& track, G4double previousStepSize,
99 G4ForceCondition* condition) override;
100
101 // implementation of the pure virtual method
102 G4double GetContinuousStepLimit(const G4Track& track, G4double previousStepSize,
103 G4double currentMinimumStep, G4double& currentSafety) override;
104
105 // print description in html
106 void ProcessDescription(std::ostream&) const override;
107
108 // hide assignment operator
109 G4DynamicParticleIonisation & operator=
110 (const G4DynamicParticleIonisation& right) = delete;
111 G4DynamicParticleIonisation(const G4DynamicParticleIonisation&) = delete;
112
113 private:
114
115 // all parameters are dynamic
116 void PreStepInitialisation(const G4Track&);
117
118 // dEdx for given energy
119 G4double ComputeDEDX(G4double ekin);
120
121 // cross section per volume
122 G4double ComputeCrossSection(G4double ekin);
123
124 G4LossTableManager* lManager;
125 G4VEmFluctuationModel* fUrban;
126 const G4ParticleDefinition* theElectron;
127 const G4MaterialCutsCouple* fCouple{nullptr};
128 const G4Material* fMaterial{nullptr};
129 const std::vector<G4double>* fCuts{nullptr};
130
131 G4double fMass{0.0};
132 G4double fRatio{0.0};
133 G4double fCharge{0.0};
134 G4double fCut{0.0};
135 G4double fTmax{0.0};
136 G4double fEkinPreStep{0.0};
137 G4double fLowestEkin{0.0};
138 G4double fLinLimit{0.05};
139
140 G4int fSecID{_DeltaElectron};
141 G4bool fFluct{true};
142
143 G4ParticleChangeForLoss fParticleChange;
144 };
145
146 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
147
148 #endif
149