Gabriele Cosmo
123 lines
4.0 KiB
C++
123 lines
4.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4IonFluctuations
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 02.04.2003
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//
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// Modifications:
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//
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// 16-10-03 Changed interface to Initialisation (V.Ivanchenko)
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// 01-06-08 Added initialisation of effective charge prestep (V.Ivanchenko)
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//
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// Class Description:
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//
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// Implementation of ion energy loss fluctuations
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// -------------------------------------------------------------------
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//
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#ifndef G4IonFluctuations_h
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#define G4IonFluctuations_h 1
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#include "G4VEmFluctuationModel.hh"
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#include "G4ParticleDefinition.hh"
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class G4Pow;
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class G4UniversalFluctuation;
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class G4IonFluctuations : public G4VEmFluctuationModel
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{
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public:
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explicit G4IonFluctuations(const G4String& nam = "IonFluc");
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~G4IonFluctuations() override;
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// Sample fluctuations
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G4double SampleFluctuations(const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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const G4double tcut,
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const G4double tmax,
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const G4double length,
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const G4double meanLoss) override;
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// Compute dispertion
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G4double Dispersion(const G4Material*,
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const G4DynamicParticle*,
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const G4double tcut,
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const G4double tmax,
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const G4double length) override;
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// Initialisation prerun
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void InitialiseMe(const G4ParticleDefinition*) override;
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// Initialisation prestep
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void SetParticleAndCharge(const G4ParticleDefinition*,
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G4double q2) override;
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// hide assignment operator
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G4IonFluctuations & operator=(const G4IonFluctuations &right) = delete;
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G4IonFluctuations(const G4IonFluctuations&) = delete;
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private:
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G4double Factor(const G4Material*, G4double Zeff);
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G4double RelativisticFactor(const G4Material*, G4double Zeff);
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const G4ParticleDefinition* particle = nullptr;
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G4UniversalFluctuation* uniFluct;
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G4Pow* g4calc;
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G4double particleMass;
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G4double charge = 1.0;
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G4double chargeSquare = 1.0;
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G4double effChargeSquare = 1.0;
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// data members to speed up the fluctuation calculation
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G4double parameter;
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G4double theBohrBeta2;
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G4double minFraction = 0.2;
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G4double xmin = 0.2;
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G4double minLoss;
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// cash
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G4double kineticEnergy = 0.0;
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G4double beta2 = 0.0;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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