Gabriele Cosmo
191 lines
7.7 KiB
C++
191 lines
7.7 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// $Id: G4VLowEnergyDiscretePhotonProcess.hh,v 1.2 2005/05/20 15:19:18 pia Exp $
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// GEANT4 tag $Name: geant4-08-00 $
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//
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// --------------------------------------------------------------
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//
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// File name: G4VLowEnergyDiscretePhotonProcess.hh
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//
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// Author: Capra Riccardo
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//
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// Creation date: May 2005
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//
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// History:
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// -----------
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// 02 May 2005 R. Capra 1st implementation
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// 20 May 2005 MGP Modified protected member functions to return a const pointer
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//
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//----------------------------------------------------------------
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#ifndef G4VLowEnergyDiscretePhotonProcess_hh
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#define G4VLowEnergyDiscretePhotonProcess_hh
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// Base class
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#include "G4VDiscreteProcess.hh"
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// Forward declaration
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class G4String;
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class G4ParticleDefinition;
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class G4DynamicParticle;
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class G4Track;
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class G4VCrossSectionHandler;
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class G4VEMDataSet;
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class G4VDataSetAlgorithm;
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// G4VLowEnergyDiscretePhotonProcess
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// A common class for Rayleigh and Compton processes
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class G4VLowEnergyDiscretePhotonProcess : public G4VDiscreteProcess
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{
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public:
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// Class constructor
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//
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// Creates crossSectionHandler and scatterFunctionData
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// scatterFunctionData are loaded from the scatterFile file, and are interpolated with scatterInterpolation algorithm
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// processName The name of the process
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// aCrossSectionFileName The name of the cross-section data file
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// aScatterFileName The name of the scatter function data
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// aScatterInterpolation The interpolation algorithm
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// aLowEnergyLimit The lower energy limit of validity against data
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// aHighEnergyLimit The higher energy limit of validity against data
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G4VLowEnergyDiscretePhotonProcess(const G4String& processName,
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const G4String& aCrossSectionFileName,
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const G4String& aScatterFileName,
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G4VDataSetAlgorithm* aScatterInterpolation,
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G4double aLowEnergyLimit,
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G4double aHighEnergyLimit);
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// Class destructor
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//
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// Deletes crossSectionHandler, meanFreePathTable and scatterFunctionData
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virtual ~G4VLowEnergyDiscretePhotonProcess(void);
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// Checks if the process is applicable to the particle
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//
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// For processes inheriting from this class the only applicable particle is the photon
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// particleDefinition Is the particle to be checked for the applicability of the process
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// true only if the particle is a photon
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virtual G4bool IsApplicable(const G4ParticleDefinition& particleDefinition);
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// Updates the crossSectionHandler and builds the meanFreePathTable from it
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//
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// crossSectionHandler data is loaded from crossSectionFile file
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// photon particle is always a photon
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virtual void BuildPhysicsTable(const G4ParticleDefinition& photon);
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// Calls GetMeanFreePath (for testing purpose only)
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// aTrack the particle momentum for which the mean free path must be evaluates (a photon)
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// previousStepSize the size of the prevous step (not used by this implementation)
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// condition the consition to be updated (not used by this implementation)
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// The mean free path evaluated by GetMeanFreePath
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inline G4double DumpMeanFreePath(const G4Track& aTrack,
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G4double previousStepSize,
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G4ForceCondition* condition)
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{return GetMeanFreePath(aTrack, previousStepSize, condition);}
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// Returns the low energy limit of the process
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// The low energy limit of the process
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inline G4double GetLowEnergyLimit(void) const {return lowEnergyLimit;}
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// Returns the high energy limit of the process
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// The high energy limit of the process
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inline G4double GetHighEnergyLimit(void) const {return highEnergyLimit;}
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protected:
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// Evaluates the process mean free path
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//
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// Mean free path evaluation is based on meanFreePathTable generated by the crossSectionHandler with data taken from the crossSectionFile.
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// The method uses lowEnergyLimit and highEnergyLimit
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// aTrack the particle momentum for which the mean free path must be evaluates (a photon)
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// previousStepSize the size of the prevous step (not used by this implementation)
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// condition the consition to be updated (not used by this implementation)
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// The mean free path for the process
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virtual G4double GetMeanFreePath(const G4Track &aTrack,
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G4double previousStepSize,
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G4ForceCondition* condition);
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// Returns the cross-section handler
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// The cross-section handler
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inline const G4VCrossSectionHandler* GetCrossSectionHandler(void) const {return crossSectionHandler;}
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// Returns the mean free path table
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// The mean free path table
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inline const G4VEMDataSet* GetMeanFreePathTable(void) const {return meanFreePathTable;}
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// Returns the scatter function data
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// The scatter function data
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inline const G4VEMDataSet* GetScatterFunctionData(void) const {return scatterFunctionData;}
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// Verifies if the polarization vector is orthonormal to the photon direction
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//
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// This method is used by polarized processes. It returns always a vector orthonormal to the photon direction.
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// When G4DynamicParticle::GetPolarization() is well defined the returned vector matches this vector.
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// When G4DynamicParticle::GetPolarization() is sensibly different from a null-vector, the returned vector is
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// orthonormal to the photon direction and on the plane made with G4DynamicParticle::GetPolarization()
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// When G4DynamicParticle::GetPolarization() is almost a null-vector, the returned vector is a random
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// vector orthonormal to the photon direction
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// photon The incoming photon
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// s Always a vector ortogonal to the photon direction.
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G4ThreeVector GetPhotonPolarization(const G4DynamicParticle& photon);
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private:
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// Hides copy constructor
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G4VLowEnergyDiscretePhotonProcess(const G4VLowEnergyDiscretePhotonProcess& );
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// Hides assignment operator
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G4VLowEnergyDiscretePhotonProcess& operator=(const G4VLowEnergyDiscretePhotonProcess& );
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// Low energy limit
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G4double lowEnergyLimit;
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// High energy limit
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G4double highEnergyLimit;
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// Cross-section file name
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G4String crossSectionFileName;
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// Cross-section handler
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G4VCrossSectionHandler* crossSectionHandler;
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// The mean free path table based on cross-section data
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G4VEMDataSet* meanFreePathTable;
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// Scatter function table
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G4VEMDataSet* scatterFunctionData;
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};
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#endif /* G4VLowEnergyDiscretePhotonProcess_hh */
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