Gabriele Cosmo
210 lines
6.3 KiB
C++
210 lines
6.3 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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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 statement,
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// and all its terms.
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//
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// $Id: G4PAIxSection.hh,v 1.4 1999/12/15 14:51:47 gunter Exp $
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// GEANT4 tag $Name: geant4-03-00 $
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//
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//
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// G4PAIxSection.hh -- header file
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//
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// GEANT 4 class header file --- Copyright CERN 1995
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// CERB Geneva Switzerland
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//
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// for information related to this code, please, contact
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// CERN, CN Division, ASD Group
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//
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// Preparation of ionizing collision cross section according to Photo Absorption
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// Ionization (PAI) model for simulation of ionization energy losses in very thin
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// absorbers
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//
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// History:
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// 1st version 11.06.97, V. Grichine
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// 2nd version 30.11.97, V. Grichine
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// 27.10.99, V.Grichine: Bug fixed in constructors, 3rd constructor and
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// GetStepEnergyLoss(step) were added, fDelta = 0.005
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#ifndef G4PAIXSECTION_HH
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#define G4PAIXSECTION_HH
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#include "G4ios.hh"
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#include "globals.hh"
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#include "Randomize.hh"
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#include"G4SandiaTable.hh"
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class G4PAIxSection
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{
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public:
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// Constructors
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G4PAIxSection( G4int materialIndex,
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G4double maxEnergyTransfer ) ;
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G4PAIxSection( G4int materialIndex, // for proton loss table
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G4double maxEnergyTransfer,
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G4double betaGammaSq ,
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G4double** photoAbsCof, G4int intNumber ) ;
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G4PAIxSection( G4int materialIndex, // test constructor
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G4double maxEnergyTransfer,
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G4double betaGammaSq ) ;
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// G4PAIxSection(const G4PAIxSection& right) ;
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// Destructor
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~G4PAIxSection() ;
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// Operators
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// G4PAIxSection& operator=(const G4PAIxSection& right) ;
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// G4int operator==(const G4PAIxSection& right)const ;
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// G4int operator!=(const G4PAIxSection& right)const ;
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// Methods
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// General control functions
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void InitPAI() ;
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void NormShift( G4double betaGammaSq ) ;
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void SplainPAI( G4double betaGammaSq ) ;
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// Physical methods
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void IntegralPAIxSection() ;
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G4double RutherfordIntegral( G4int intervalNumber,
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G4double limitLow,
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G4double limitHigh ) ;
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G4double ImPartDielectricConst( G4int intervalNumber,
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G4double energy ) ;
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G4double RePartDielectricConst(G4double energy) ;
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G4double DifPAIxSection( G4int intervalNumber,
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G4double betaGammaSq ) ;
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G4double SumOverInterval(G4int intervalNumber) ;
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G4double SumOverBorder( G4int intervalNumber,
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G4double energy ) ;
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G4double GetStepEnergyLoss( G4double step ) ;
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// Inline access functions
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G4int GetNumberOfGammas() const { return fNumberOfGammas ; }
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G4int GetSplineSize() const { return fSplineNumber ; }
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G4int GetIntervalNumber() const { return fIntervalNumber ; }
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G4double GetEnergyInterval(G4int i){ return fEnergyInterval[i] ; }
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G4double GetMeanEnergyLoss() const {return fIntegralPAIxSection[0] ; }
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G4double GetNormalizationCof() const { return fNormalizationCof ; }
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inline G4double GetPAItable(G4int i,G4int j) const ;
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inline G4double GetLorentzFactor(G4int i) const ;
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inline G4double GetSplineEnergy(G4int i) const ;
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inline G4double GetIntegralPAIxSection(G4int i) const ;
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protected :
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private :
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// Local class constants
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static const G4double fDelta ; // energy shift from interval border = 0.001
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static const G4double fError ; // error in lin-log approximation = 0.005
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static G4int fNumberOfGammas ; // = 111 ;
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static const G4double fLorentzFactor[112] ; // static gamma array
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static
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const G4int fRefGammaNumber ; // The number of gamma for creation of spline (15)
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G4int fIntervalNumber ; // The number of energy intervals
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G4double fNormalizationCof ; // Normalization cof for PhotoAbsorptionXsection
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// G4double fBetaGammaSq ; // (beta*gamma)^2
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G4double fDensity ; // Current density
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G4double fElectronDensity ; // Current electron (number) density
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G4int fSplineNumber ; // Current size of spline
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// Arrays of Sandia coefficients
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G4double* fEnergyInterval ;
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G4double* fA1 ;
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G4double* fA2 ;
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G4double* fA3 ;
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G4double* fA4 ;
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static
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const G4int fMaxSplineSize ; // Max size of output splain arrays = 500
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/* ******************
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G4double* fSplineEnergy ; // energy points of splain
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G4double* fRePartDielectricConst ; // Real part of dielectric const
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G4double* fImPartDielectricConst ; // Imaginary part of dielectric const
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G4double* fIntegralTerm ; // Integral term in PAI cross section
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G4double* fDifPAIxSection ; // Differential PAI cross section
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G4double* fIntegralPAIxSection ; // Integral PAI cross section ?
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*/ ///////////////
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G4double fSplineEnergy[500] ; // energy points of splain
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G4double fRePartDielectricConst[500] ; // Real part of dielectric const
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G4double fImPartDielectricConst[500] ; // Imaginary part of dielectric const
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G4double fIntegralTerm[500] ; // Integral term in PAI cross section
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G4double fDifPAIxSection[500] ; // Differential PAI cross section
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G4double fIntegralPAIxSection[500] ; // Integral PAI cross section ?
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G4double fPAItable[500][112] ; // Output array
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} ;
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//////////////// Inline methods //////////////////////////////////
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//
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inline G4double G4PAIxSection::GetPAItable(G4int i, G4int j) const
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{
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return fPAItable[i][j] ;
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}
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inline G4double G4PAIxSection::GetLorentzFactor(G4int j) const
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{
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return fLorentzFactor[j] ;
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}
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inline G4double G4PAIxSection::GetSplineEnergy(G4int i) const
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{
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if(i < 1 || i > fSplineNumber)
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{
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G4Exception("Invalid argument in G4PAIxSection::GetSplineEnergy");
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}
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return fSplineEnergy[i] ;
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}
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inline G4double G4PAIxSection::GetIntegralPAIxSection(G4int i) const
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{
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if(i < 1 || i > fSplineNumber)
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{
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G4Exception("Invalid argument in G4PAIxSection::GetIntegralPAIxSection");
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}
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return fIntegralPAIxSection[i] ;
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}
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#endif
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// ----------------- end of G4PAIxSection header file -------------------
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