Geant4 Cross Reference |
1 // 1 2 // ******************************************* 3 // * License and Disclaimer 4 // * 5 // * The Geant4 software is copyright of th 6 // * the Geant4 Collaboration. It is provided 7 // * conditions of the Geant4 Software License 8 // * LICENSE and available at http://cern.ch/ 9 // * include a list of copyright holders. 10 // * 11 // * Neither the authors of this software syst 12 // * institutes,nor the agencies providing fin 13 // * work make any representation or warran 14 // * regarding this software system or assum 15 // * use. Please see the license in the file 16 // * for the full disclaimer and the limitatio 17 // * 18 // * This code implementation is the result 19 // * technical work of the GEANT4 collaboratio 20 // * By using, copying, modifying or distri 21 // * any work based on the software) you ag 22 // * use in resulting scientific publicati 23 // * acceptance of all terms of the Geant4 Sof 24 // ******************************************* 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