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25 //
26 //
27 // -------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4IonFluctuations
33 //
34 // Author: Vladimir Ivanchenko
35 //
36 // Creation date: 02.04.2003
37 //
38 // Modifications:
39 //
40 // 16-10-03 Changed interface to Initialisatio
41 // 01-06-08 Added initialisation of effective
42 //
43 // Class Description:
44 //
45 // Implementation of ion energy loss fluctuati
46
47 // -------------------------------------------
48 //
49
50 #ifndef G4IonFluctuations_h
51 #define G4IonFluctuations_h 1
52
53 #include "G4VEmFluctuationModel.hh"
54 #include "G4ParticleDefinition.hh"
55
56 class G4Pow;
57 class G4UniversalFluctuation;
58
59 class G4IonFluctuations : public G4VEmFluctuat
60 {
61
62 public:
63
64 explicit G4IonFluctuations(const G4String& n
65
66 ~G4IonFluctuations() override;
67
68 // Sample fluctuations
69 G4double SampleFluctuations(const G4Material
70 const G4DynamicParticle*,
71 const G4double tcut,
72 const G4double tmax,
73 const G4double length,
74 const G4double meanLoss) override;
75
76 // Compute dispertion
77 G4double Dispersion(const G4Material*,
78 const G4DynamicParticle*,
79 const G4double tcut,
80 const G4double tmax,
81 const G4double length) override;
82
83 // Initialisation prerun
84 void InitialiseMe(const G4ParticleDefinition
85
86 // Initialisation prestep
87 void SetParticleAndCharge(const G4ParticleDe
88 G4double q2) override;
89
90 // hide assignment operator
91 G4IonFluctuations & operator=(const G4IonFl
92 G4IonFluctuations(const G4IonFluctuations&)
93
94 private:
95
96 G4double Factor(const G4Material*, G4double
97 G4double RelativisticFactor(const G4Material
98
99 const G4ParticleDefinition* particle = nullp
100 G4UniversalFluctuation* uniFluct;
101 G4Pow* g4calc;
102
103 G4double particleMass;
104 G4double charge = 1.0;
105 G4double chargeSquare = 1.0;
106 G4double effChargeSquare = 1.0;
107
108 // data members to speed up the fluctuation
109 G4double parameter;
110 G4double theBohrBeta2;
111 G4double minFraction = 0.2;
112 G4double xmin = 0.2;
113 G4double minLoss;
114 // cash
115 G4double kineticEnergy = 0.0;
116 G4double beta2 = 0.0;
117 };
118
119 //....oooOO0OOooo........oooOO0OOooo........oo
120
121 #endif
122
123