| 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: G4UniversalFluctuation.hh,v 1.6 2008/10/22 16:04:33 vnivanch Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-02 $
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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: G4UniversalFluctuation
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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: 03.01.2002
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| 39 | //
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| 40 | // Modifications:
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| 41 | //
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| 42 | // 09-12-02 remove warnings (V.Ivanchenko)
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| 43 | // 28-12-02 add method Dispersion (V.Ivanchenko)
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| 44 | // 07-02-03 change signature (V.Ivanchenko)
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| 45 | // 13-02-03 Add name (V.Ivanchenko)
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| 46 | // 16-10-03 Changed interface to Initialisation (V.Ivanchenko)
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| 47 | // 07-02-05 define problim = 5.e-3 (mma)
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| 48 | //
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| 49 | // Class Description:
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| 50 | //
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| 51 | // Implementation of energy loss fluctuations
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| 52 |
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| 53 | // -------------------------------------------------------------------
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| 54 | //
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| 55 |
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| 56 | #ifndef G4UniversalFluctuation_h
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| 57 | #define G4UniversalFluctuation_h 1
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| 58 |
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| 59 |
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| 60 | #include "G4VEmFluctuationModel.hh"
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| 61 | #include "G4ParticleDefinition.hh"
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| 62 |
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| 63 | class G4UniversalFluctuation : public G4VEmFluctuationModel
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| 64 | {
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| 65 |
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| 66 | public:
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| 67 |
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| 68 | G4UniversalFluctuation(const G4String& nam = "UniFluc");
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| 69 |
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| 70 | virtual ~G4UniversalFluctuation();
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| 71 |
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| 72 | G4double SampleFluctuations(const G4Material*,
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| 73 | const G4DynamicParticle*,
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| 74 | G4double&,
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| 75 | G4double&,
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| 76 | G4double&);
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| 77 |
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| 78 | G4double Dispersion( const G4Material*,
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| 79 | const G4DynamicParticle*,
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| 80 | G4double&,
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| 81 | G4double&);
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| 82 |
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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 | inline void SetParticleAndCharge(const G4ParticleDefinition*, G4double q2);
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| 87 |
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| 88 | protected:
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| 89 |
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| 90 | private:
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| 91 |
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| 92 | // hide assignment operator
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| 93 | G4UniversalFluctuation & operator=(const G4UniversalFluctuation &right);
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| 94 | G4UniversalFluctuation(const G4UniversalFluctuation&);
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| 95 |
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| 96 | const G4ParticleDefinition* particle;
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| 97 | const G4Material* lastMaterial;
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| 98 |
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| 99 | G4double particleMass;
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| 100 | G4double chargeSquare;
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| 101 |
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| 102 | // data members to speed up the fluctuation calculation
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| 103 | G4double ipotFluct;
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| 104 | G4double electronDensity;
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| 105 |
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| 106 | G4double f1Fluct;
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| 107 | G4double f2Fluct;
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| 108 | G4double e1Fluct;
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| 109 | G4double e2Fluct;
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| 110 | G4double e1LogFluct;
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| 111 | G4double e2LogFluct;
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| 112 | G4double ipotLogFluct;
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| 113 | G4double e0;
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| 114 |
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| 115 | G4double facwidth;
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| 116 | G4double oldloss;
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| 117 | G4double samestep;
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| 118 | G4double e1,e2;
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| 119 |
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| 120 | G4double minNumberInteractionsBohr;
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| 121 | G4double theBohrBeta2;
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| 122 | G4double minLoss;
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| 123 | G4double nmaxCont1;
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| 124 | G4double nmaxCont2;
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| 125 |
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| 126 | };
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| 127 |
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| 128 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 129 |
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| 130 | inline void
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| 131 | G4UniversalFluctuation::SetParticleAndCharge(const G4ParticleDefinition* part,
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| 132 | G4double q2)
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| 133 | {
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| 134 | if(part != particle) {
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| 135 | particle = part;
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| 136 | particleMass = part->GetPDGMass();
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| 137 | }
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| 138 | chargeSquare = q2;
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| 139 | }
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| 140 |
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| 141 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 142 |
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| 143 | #endif
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| 144 |
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