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