| 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: geant4-09-04-beta-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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