Gabriele Cosmo
365 lines
12 KiB
C++
365 lines
12 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: G4VEmModel.hh,v 1.34 2005/05/11 08:06:19 vnivanch Exp $
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// GEANT4 tag $Name: geant4-07-01 $
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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: G4VEmModel
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 03.01.2002
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//
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// Modifications:
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//
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// 23-12-02 V.Ivanchenko change interface before move to cut per region
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// 24-01-03 Cut per region (V.Ivanchenko)
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// 13-02-03 Add name (V.Ivanchenko)
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// 25-02-03 Add sample theta and displacement (V.Ivanchenko)
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// 23-07-03 Replace G4Material by G4MaterialCutCouple in dE/dx and CrossSection
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// calculation (V.Ivanchenko)
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// 01-03-04 L.Urban signature changed in SampleCosineTheta
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// 23-04-04 L.urban signature of SampleCosineTheta changed back
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// 17-11-04 Add method CrossSectionPerAtom (V.Ivanchenko)
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// 14-03-05 Reduce number of pure virtual methods and make inline part separate (V.Ivanchenko)
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// 24-03-05 Remove IsInCharge and add G4VParticleChange in the constructor (V.Ivanchenko)
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// 08-04-05 Major optimisation of internal interfaces (V.Ivantchenko)
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// 15-04-05 optimize internal interface for msc (V.Ivanchenko)
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// 08-05-05 A -> N (V.Ivanchenko)
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//
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// Class Description:
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//
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// Abstract interface to energy loss models
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// -------------------------------------------------------------------
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//
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#ifndef G4VEmModel_h
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#define G4VEmModel_h 1
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#include "globals.hh"
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#include "G4DynamicParticle.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4MaterialCutsCouple.hh"
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#include "G4Material.hh"
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#include "G4Element.hh"
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#include "G4ElementVector.hh"
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#include "G4DataVector.hh"
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#include "G4VEmFluctuationModel.hh"
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#include "Randomize.hh"
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class G4PhysicsTable;
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class G4Region;
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class G4VParticleChange;
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class G4VEmModel
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{
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public:
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G4VEmModel(const G4String& nam);
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virtual ~G4VEmModel();
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//------------------------------------------------------------------------
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// Virtual methods to be implemented for the concrete model
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//------------------------------------------------------------------------
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virtual void Initialise(const G4ParticleDefinition*, const G4DataVector&) = 0;
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virtual std::vector<G4DynamicParticle*>* SampleSecondaries(
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const G4MaterialCutsCouple*,
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const G4DynamicParticle*,
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G4double tmin = 0.0,
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G4double tmax = DBL_MAX) = 0;
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//------------------------------------------------------------------------
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// Methods with standard implementation; may be overwritten if needed
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//------------------------------------------------------------------------
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virtual G4double MinEnergyCut(const G4ParticleDefinition*,
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const G4MaterialCutsCouple*);
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virtual G4double ComputeDEDX(const G4MaterialCutsCouple*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy = DBL_MAX);
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virtual G4double CrossSection(const G4MaterialCutsCouple*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy = 0.0,
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G4double maxEnergy = DBL_MAX);
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virtual G4double ComputeDEDXPerVolume(
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const G4Material*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy = DBL_MAX);
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virtual G4double CrossSectionPerVolume(
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const G4Material*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy = 0.0,
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G4double maxEnergy = DBL_MAX);
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virtual G4double ComputeCrossSectionPerAtom(
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const G4ParticleDefinition*,
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G4double kinEnergy,
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G4double Z,
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G4double A,
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G4double cutEnergy = 0.0,
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G4double maxEnergy = DBL_MAX);
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// Methods for msc simulation
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virtual G4double GeomPathLength(G4PhysicsTable* theLambdaTable,
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const G4MaterialCutsCouple*,
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const G4ParticleDefinition*,
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G4double& kinEnergy,
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G4double lambda,
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G4double range,
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G4double truePathLength);
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virtual G4double TrueStepLength(G4double geomStepLength);
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virtual void DefineForRegion(const G4Region*);
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protected:
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virtual G4double MaxSecondaryEnergy(const G4ParticleDefinition*,
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G4double kineticEnergy);
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//------------------------------------------------------------------------
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// Generic methods common to all models
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//------------------------------------------------------------------------
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public:
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void SetParticleChange(G4VParticleChange*, G4VEmFluctuationModel*);
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G4VEmFluctuationModel* GetModelOfFluctuations();
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G4double HighEnergyLimit();
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G4double LowEnergyLimit();
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void SetHighEnergyLimit(G4double);
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void SetLowEnergyLimit(G4double);
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G4double MaxSecondaryKinEnergy(const G4DynamicParticle* dynParticle);
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const G4Element* SelectRandomAtom(const G4Material*,
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const G4ParticleDefinition*,
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G4double kineticEnergy,
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G4double cutEnergy = 0.0,
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G4double maxEnergy = DBL_MAX);
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const G4String& GetName() const;
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private:
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// hide assignment operator
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G4VEmModel & operator=(const G4VEmModel &right);
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G4VEmModel(const G4VEmModel&);
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G4double lowLimit;
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G4double highLimit;
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G4double xsec[40];
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G4VEmFluctuationModel* fluc;
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const G4String name;
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protected:
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G4VParticleChange* pParticleChange;
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};
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4VEmModel::G4VEmModel(const G4String& nam):
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lowLimit(0.0), highLimit(0.0), fluc(0), name(nam), pParticleChange(0)
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{}
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inline G4VEmModel::~G4VEmModel()
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{}
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inline G4double G4VEmModel::HighEnergyLimit()
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{
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return highLimit;
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}
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inline G4double G4VEmModel::LowEnergyLimit()
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{
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return lowLimit;
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}
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inline void G4VEmModel::SetHighEnergyLimit(G4double val)
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{
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highLimit = val;
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}
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inline void G4VEmModel::SetLowEnergyLimit(G4double val)
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{
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lowLimit = val;
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}
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inline void G4VEmModel::SetParticleChange(G4VParticleChange* p,
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G4VEmFluctuationModel* f = 0)
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{
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if(p && pParticleChange != p) pParticleChange = p;
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fluc = f;
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}
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inline G4VEmFluctuationModel* G4VEmModel::GetModelOfFluctuations()
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{
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return fluc;
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}
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inline G4double G4VEmModel::MinEnergyCut(const G4ParticleDefinition*,
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const G4MaterialCutsCouple*)
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{
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return 0.0;
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}
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inline G4double G4VEmModel::ComputeDEDXPerVolume(
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const G4Material*,
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const G4ParticleDefinition*,
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G4double,
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G4double)
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{
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return 0.0;
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}
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inline G4double G4VEmModel::ComputeDEDX(const G4MaterialCutsCouple* c,
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const G4ParticleDefinition* p,
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G4double kinEnergy,
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G4double cutEnergy)
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{
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return ComputeDEDXPerVolume(c->GetMaterial(),p,kinEnergy,cutEnergy);
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}
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inline G4double G4VEmModel::CrossSection(const G4MaterialCutsCouple* c,
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const G4ParticleDefinition* p,
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G4double kinEnergy,
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G4double cutEnergy,
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G4double maxEnergy)
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{
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return CrossSectionPerVolume(c->GetMaterial(),p,kinEnergy,cutEnergy,maxEnergy);
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}
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inline G4double G4VEmModel::CrossSectionPerVolume(
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const G4Material* material,
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const G4ParticleDefinition* p,
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G4double ekin,
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G4double emin,
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G4double emax)
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{
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G4double cross = 0.0;
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const G4ElementVector* theElementVector = material->GetElementVector();
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const G4double* theAtomNumDensityVector = material->GetVecNbOfAtomsPerVolume();
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size_t nelm = material->GetNumberOfElements();
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for (size_t i=0; i<nelm; i++) {
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const G4Element* elm = (*theElementVector)[i];
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cross += theAtomNumDensityVector[i]*
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ComputeCrossSectionPerAtom(p,ekin,elm->GetZ(),elm->GetN(),emin,emax);
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xsec[i] = cross;
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}
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return cross;
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}
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inline G4double G4VEmModel::ComputeCrossSectionPerAtom(
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const G4ParticleDefinition*,
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G4double, G4double, G4double, G4double, G4double)
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{
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return 0.0;
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}
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inline const G4Element* G4VEmModel::SelectRandomAtom(
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const G4Material* material,
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const G4ParticleDefinition* pd,
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G4double kinEnergy,
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G4double tcut,
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G4double tmax)
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{
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const G4ElementVector* theElementVector = material->GetElementVector();
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const G4Element* elm = (*theElementVector)[0];
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G4int nelm = material->GetNumberOfElements() - 1;
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if(nelm > 0) {
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G4double x = G4UniformRand()*CrossSectionPerVolume(material,pd,kinEnergy,tcut,tmax);
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G4int i = -1;
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do {i++;} while (x > xsec[i] && i < nelm);
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elm = (*theElementVector)[i];
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}
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return elm;
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}
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inline G4double G4VEmModel::MaxSecondaryKinEnergy(const G4DynamicParticle* dynParticle)
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{
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return MaxSecondaryEnergy(dynParticle->GetDefinition(), dynParticle->GetKineticEnergy());
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}
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inline G4double G4VEmModel::MaxSecondaryEnergy(const G4ParticleDefinition*,
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G4double kineticEnergy)
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{
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return kineticEnergy;
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}
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inline const G4String& G4VEmModel::GetName() const
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{
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return name;
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}
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// Methods for msc simulation
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inline G4double G4VEmModel::GeomPathLength(G4PhysicsTable*,
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const G4MaterialCutsCouple*,
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const G4ParticleDefinition*,
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G4double&,
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G4double,
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G4double,
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G4double truePathLength)
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{
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return truePathLength;
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}
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inline G4double G4VEmModel::TrueStepLength(G4double geomStepLength)
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{
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return geomStepLength;
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}
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inline void G4VEmModel::DefineForRegion(const G4Region*)
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{}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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