1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // $Id: G4IonFluctuations.hh,v 1.9 2009/02/19 19:17:50 vnivanch Exp $ |
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27 | // GEANT4 tag $Name: geant4-09-03-beta-cand-01 $ |
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28 | // |
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29 | // ------------------------------------------------------------------- |
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30 | // |
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31 | // GEANT4 Class header file |
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32 | // |
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33 | // |
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34 | // File name: G4IonFluctuations |
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35 | // |
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36 | // Author: Vladimir Ivanchenko |
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37 | // |
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38 | // Creation date: 02.04.2003 |
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39 | // |
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40 | // Modifications: |
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41 | // |
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42 | // 16-10-03 Changed interface to Initialisation (V.Ivanchenko) |
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43 | // 01-06-08 Added initialisation of effective charge prestep (V.Ivanchenko) |
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44 | // |
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45 | // Class Description: |
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46 | // |
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47 | // Implementation of ion energy loss fluctuations |
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48 | |
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49 | // ------------------------------------------------------------------- |
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50 | // |
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51 | |
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52 | #ifndef G4IonFluctuations_h |
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53 | #define G4IonFluctuations_h 1 |
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54 | |
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55 | |
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56 | #include "G4VEmFluctuationModel.hh" |
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57 | #include "G4ParticleDefinition.hh" |
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58 | #include "G4UniversalFluctuation.hh" |
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59 | |
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60 | class G4IonFluctuations : public G4VEmFluctuationModel |
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61 | { |
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62 | |
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63 | public: |
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64 | |
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65 | G4IonFluctuations(const G4String& nam = "IonFluc"); |
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66 | |
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67 | virtual ~G4IonFluctuations(); |
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68 | |
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69 | // Sample fluctuations |
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70 | G4double SampleFluctuations(const G4Material*, |
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71 | const G4DynamicParticle*, |
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72 | G4double& tmax, |
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73 | G4double& length, |
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74 | G4double& meanLoss); |
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75 | |
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76 | // Compute dispertion |
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77 | G4double Dispersion(const G4Material*, |
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78 | const G4DynamicParticle*, |
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79 | G4double& tmax, |
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80 | G4double& length); |
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81 | |
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82 | // Initialisation prerun |
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83 | void InitialiseMe(const G4ParticleDefinition*); |
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84 | |
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85 | // Initialisation prestep |
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86 | void SetParticleAndCharge(const G4ParticleDefinition*, G4double q2); |
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87 | |
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88 | private: |
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89 | |
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90 | G4double Factor(const G4Material*, G4double Zeff); |
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91 | G4double RelativisticFactor(const G4Material*, G4double Zeff); |
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92 | |
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93 | // hide assignment operator |
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94 | G4IonFluctuations & operator=(const G4IonFluctuations &right); |
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95 | G4IonFluctuations(const G4IonFluctuations&); |
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96 | |
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97 | G4UniversalFluctuation uniFluct; |
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98 | const G4ParticleDefinition* particle; |
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99 | |
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100 | G4double particleMass; |
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101 | G4double charge; |
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102 | G4double chargeSquare; |
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103 | G4double effChargeSquare; |
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104 | |
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105 | // data members to speed up the fluctuation calculation |
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106 | G4double parameter; |
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107 | G4double minNumberInteractionsBohr; |
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108 | G4double theBohrBeta2; |
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109 | G4double minFraction; |
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110 | G4double xmin; |
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111 | G4double minLoss; |
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112 | // cash |
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113 | G4double kineticEnergy; |
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114 | G4double beta2; |
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115 | }; |
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116 | |
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117 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
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118 | |
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119 | #endif |
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120 | |
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