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25 //
26 //
27 // -------------------------------------------------------------------
28 //
29 // GEANT4 Class header file
30 //
31 //
32 // File name: G4AtimaFluctuations
33 //
34 // Author: Jose Luis Rodriguez Sanchez on base of ATIMA code
35 //
36 // Creation date: 16.01.2018
37 //
38 // Modifications:
39 //
40 //
41 // Class Description:
42 //
43 // Implementation of ion energy loss fluctuations
44 //
45 // -------------------------------------------------------------------
46 //
47
48 #ifndef G4AtimaFluctuations_h
49 #define G4AtimaFluctuations_h 1
50
51
52 #include "G4VEmFluctuationModel.hh"
53 #include "G4ParticleDefinition.hh"
54 #include "G4UniversalFluctuation.hh"
55
56 class G4Pow;
57
58 class G4AtimaFluctuations : public G4VEmFluctuationModel
59 {
60
61 public:
62
63 explicit G4AtimaFluctuations(const G4String& nam = "IonFlucAtima");
64
65 ~G4AtimaFluctuations() override;
66
67 // Sample fluctuations
68 G4double SampleFluctuations(const G4MaterialCutsCouple*,
69 const G4DynamicParticle*,
70 const G4double tcut,
71 const G4double tmax,
72 const G4double length,
73 const G4double meanLoss) override;
74
75 // Compute dispertion
76 G4double Dispersion(const G4Material*,
77 const G4DynamicParticle*,
78 const G4double tcut,
79 const G4double tmax,
80 const G4double length) override;
81
82 // Initialisation prerun
83 void InitialiseMe(const G4ParticleDefinition*) override;
84
85 // Initialisation prestep
86 void SetParticleAndCharge(const G4ParticleDefinition*,
87 G4double q2) override;
88
89 // hide assignment operator
90 G4AtimaFluctuations & operator=(const G4AtimaFluctuations &right) = delete;
91 G4AtimaFluctuations(const G4AtimaFluctuations&) = delete;
92
93 private:
94
95 G4double EnergyTable_interpolate(const G4double* table,G4double xval, const G4double* y);
96
97 const G4ParticleDefinition* particle;
98
99 G4Pow* g4calc;
100
101 G4double particleMass;
102 G4double charge;
103 G4double chargeSquare;
104 G4double effChargeSquare;
105
106 G4double MLN10;
107 G4double atomic_mass_unit;
108 G4double dedx_constant;
109 G4double electron_mass;
110 G4double fine_structure;
111 G4double domega2dx_constant;
112
113 static G4double stepE;
114 static G4double tableE[200];
115 static const G4double ls_X_coefficients_a[110][200];
116 static const G4double ls_X_coefficients_ahi[110][200];
117 static const G4double element_atomic_weights[110];
118
119 // data members to speed up the fluctuation calculation
120 G4double minLoss;
121 // cash
122 G4double kineticEnergy;
123 G4double beta2;
124 };
125
126 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
127
128 #endif
129