G4PolarizedGammaConversionModel Class Reference

#include <G4PolarizedGammaConversionModel.hh>

Inheritance diagram for G4PolarizedGammaConversionModel:

Public Member Functions
	G4PolarizedGammaConversionModel (const G4ParticleDefinition *p=0, const G4String &nam="polConv")
virtual	~G4PolarizedGammaConversionModel ()
virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)
virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > *, const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double tmin, G4double maxEnergy)
const G4Element *	SelectedAtom ()
Public Member Functions inherited from G4BetheHeitlerModel
	G4BetheHeitlerModel (const G4ParticleDefinition *p=0, const G4String &nam="BetheHeitler")
virtual	~G4BetheHeitlerModel ()
virtual void	InitialiseLocal (const G4ParticleDefinition *, G4VEmModel *masterModel)
virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., G4double cut=0., G4double emax=DBL_MAX)
Public Member Functions inherited from G4VEmModel
	G4VEmModel (const G4String &nam)
virtual	~G4VEmModel ()
virtual void	InitialiseForMaterial (const G4ParticleDefinition *, const G4Material *)
virtual void	InitialiseForElement (const G4ParticleDefinition *, G4int Z)
virtual G4double	ComputeDEDXPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
virtual G4double	CrossSectionPerVolume (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
virtual G4double	ChargeSquareRatio (const G4Track &)
virtual G4double	GetChargeSquareRatio (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
virtual G4double	GetParticleCharge (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
virtual void	StartTracking (G4Track *)
virtual void	CorrectionsAlongStep (const G4MaterialCutsCouple *, const G4DynamicParticle *, G4double &eloss, G4double &niel, G4double length)
virtual G4double	Value (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy)
virtual G4double	MinPrimaryEnergy (const G4Material *, const G4ParticleDefinition *, G4double cut=0.0)
virtual G4double	MinEnergyCut (const G4ParticleDefinition *, const G4MaterialCutsCouple *)
virtual void	SetupForMaterial (const G4ParticleDefinition *, const G4Material *, G4double kineticEnergy)
virtual void	DefineForRegion (const G4Region *)
void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)
std::vector < G4EmElementSelector * > *	GetElementSelectors ()
void	SetElementSelectors (std::vector< G4EmElementSelector * > *)
G4double	ComputeDEDX (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=DBL_MAX)
G4double	CrossSection (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
G4double	ComputeMeanFreePath (const G4ParticleDefinition *, G4double kineticEnergy, const G4Material *, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, const G4Element *, G4double kinEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
G4int	SelectIsotopeNumber (const G4Element *)
const G4Element *	SelectRandomAtom (const G4MaterialCutsCouple *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
const G4Element *	SelectRandomAtom (const G4Material *, const G4ParticleDefinition *, G4double kineticEnergy, G4double cutEnergy=0.0, G4double maxEnergy=DBL_MAX)
G4int	SelectRandomAtomNumber (const G4Material *)
void	SetParticleChange (G4VParticleChange *, G4VEmFluctuationModel *f=0)
void	SetCrossSectionTable (G4PhysicsTable *, G4bool isLocal)
G4ElementData *	GetElementData ()
G4PhysicsTable *	GetCrossSectionTable ()
G4VEmFluctuationModel *	GetModelOfFluctuations ()
G4VEmAngularDistribution *	GetAngularDistribution ()
void	SetAngularDistribution (G4VEmAngularDistribution *)
G4double	HighEnergyLimit () const
G4double	LowEnergyLimit () const
G4double	HighEnergyActivationLimit () const
G4double	LowEnergyActivationLimit () const
G4double	PolarAngleLimit () const
G4double	SecondaryThreshold () const
G4bool	LPMFlag () const
G4bool	DeexcitationFlag () const
G4bool	ForceBuildTableFlag () const
G4bool	UseAngularGeneratorFlag () const
void	SetAngularGeneratorFlag (G4bool)
void	SetHighEnergyLimit (G4double)
void	SetLowEnergyLimit (G4double)
void	SetActivationHighEnergyLimit (G4double)
void	SetActivationLowEnergyLimit (G4double)
G4bool	IsActive (G4double kinEnergy)
void	SetPolarAngleLimit (G4double)
void	SetSecondaryThreshold (G4double)
void	SetLPMFlag (G4bool val)
void	SetDeexcitationFlag (G4bool val)
void	SetForceBuildTable (G4bool val)
void	SetMasterThread (G4bool val)
G4bool	IsMaster () const
G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)
const G4String &	GetName () const
void	SetCurrentCouple (const G4MaterialCutsCouple *)
const G4Element *	GetCurrentElement () const

Protected Attributes
G4VPolarizedCrossSection *	crossSectionCalculator
Protected Attributes inherited from G4VEmModel
G4ElementData *	fElementData
G4VParticleChange *	pParticleChange
G4PhysicsTable *	xSectionTable
const std::vector< G4double > *	theDensityFactor
const std::vector< G4int > *	theDensityIdx
size_t	idxTable

Additional Inherited Members
Protected Member Functions inherited from G4VEmModel
G4ParticleChangeForLoss *	GetParticleChangeForLoss ()
G4ParticleChangeForGamma *	GetParticleChangeForGamma ()
virtual G4double	MaxSecondaryEnergy (const G4ParticleDefinition *, G4double kineticEnergy)
const G4MaterialCutsCouple *	CurrentCouple () const
void	SetCurrentElement (const G4Element *)

Detailed Description

Definition at line 58 of file G4PolarizedGammaConversionModel.hh.

Constructor & Destructor Documentation

G4PolarizedGammaConversionModel::G4PolarizedGammaConversionModel	(	const G4ParticleDefinition *	p = 0,
		const G4String &	nam = "polConv"
	)

Definition at line 68 of file G4PolarizedGammaConversionModel.cc.

  : G4BetheHeitlerModel(pd,nam), crossSectionCalculator(0)
{
}

G4PolarizedGammaConversionModel::~G4PolarizedGammaConversionModel ( )

virtual

Definition at line 76 of file G4PolarizedGammaConversionModel.cc.

References crossSectionCalculator.

{
  if (crossSectionCalculator) delete crossSectionCalculator;
}

Member Function Documentation

void G4PolarizedGammaConversionModel::Initialise ( const G4ParticleDefinition *  pd, const G4DataVector &  dv  )

virtual

Reimplemented from G4BetheHeitlerModel.

Definition at line 83 of file G4PolarizedGammaConversionModel.cc.

References crossSectionCalculator, and G4BetheHeitlerModel::Initialise().

{
  G4BetheHeitlerModel::Initialise(pd,dv);
  if (!crossSectionCalculator)
    crossSectionCalculator = new G4PolarizedPairProductionCrossSection();
}

void G4PolarizedGammaConversionModel::SampleSecondaries ( std::vector< G4DynamicParticle * > *  vdp, const G4MaterialCutsCouple *  couple, const G4DynamicParticle *  dp, G4double  tmin, G4double  maxEnergy  )

virtual

Reimplemented from G4BetheHeitlerModel.

Definition at line 93 of file G4PolarizedGammaConversionModel.cc.

References CLHEP::Hep3Vector::cross(), crossSectionCalculator, G4cout, G4VEmModel::GetCurrentElement(), G4PolarizationHelper::GetFrame(), G4DynamicParticle::GetKineticEnergy(), G4DynamicParticle::GetMomentumDirection(), G4VPolarizedCrossSection::GetPol2(), G4VPolarizedCrossSection::GetPol3(), G4DynamicParticle::GetPolarization(), G4VPolarizedCrossSection::Initialize(), G4StokesVector::InvRotateAz(), CLHEP::Hep3Vector::mag(), G4StokesVector::p1(), G4StokesVector::p2(), G4StokesVector::p3(), G4StokesVector::RotateAz(), G4BetheHeitlerModel::SampleSecondaries(), G4VPolarizedCrossSection::SetMaterial(), G4StokesVector::SetPhoton(), and G4StokesVector::ZERO.

{
  G4BetheHeitlerModel::SampleSecondaries(vdp, couple, dp, tmin, maxEnergy);
 
  if(vdp && vdp->size()>0) {
    G4double gamEnergy0 = dp->GetKineticEnergy();
    G4double lepEnergy1 = (*vdp)[0]->GetKineticEnergy();
    G4double sintheta   = dp->GetMomentumDirection().cross((*vdp)[0]->GetMomentumDirection()).mag();
    if (sintheta>1.) sintheta=1.;

    G4StokesVector beamPol = dp->GetPolarization();
    beamPol.SetPhoton();

    // determine interaction plane
    G4ThreeVector  nInteractionFrame = 
      G4PolarizationHelper::GetFrame(dp->GetMomentumDirection(), 
                     (*vdp)[0]->GetMomentumDirection());

    // transform polarization into interaction frame
    beamPol.InvRotateAz(nInteractionFrame,dp->GetMomentumDirection());

    // calulcate polarization transfer
    crossSectionCalculator->SetMaterial(GetCurrentElement()->GetN(), // number of nucleons
                    GetCurrentElement()->GetZ(), 
                    GetCurrentElement()->GetfCoulomb());
    crossSectionCalculator->Initialize(gamEnergy0, lepEnergy1, sintheta,
                       beamPol, G4StokesVector::ZERO);

    // deterimine final state polarization
    G4StokesVector lep1Pol = crossSectionCalculator->GetPol2();
    lep1Pol.RotateAz(nInteractionFrame,(*vdp)[0]->GetMomentumDirection());
    (*vdp)[0]->SetPolarization(lep1Pol.p1(),
                   lep1Pol.p2(),
                   lep1Pol.p3());

    size_t num = vdp->size();
    if (num!=2) G4cout<<" WARNING "<<num<<" secondaries in polarized pairproduction not supported!\n"; 
    for (size_t i =1; i<num; ++i) {
      G4StokesVector lep2Pol = crossSectionCalculator->GetPol3();
      lep2Pol.RotateAz(nInteractionFrame,(*vdp)[i]->GetMomentumDirection());
      (*vdp)[i]->SetPolarization(lep2Pol.p1(),
                 lep2Pol.p2(),
                 lep2Pol.p3());

    }
  }
}

const G4Element * G4PolarizedGammaConversionModel::SelectedAtom ( )

inline

Definition at line 87 of file G4PolarizedGammaConversionModel.hh.

References G4VEmModel::GetCurrentElement().

{
  return GetCurrentElement();
}

Field Documentation

G4VPolarizedCrossSection* G4PolarizedGammaConversionModel::crossSectionCalculator

protected

Definition at line 79 of file G4PolarizedGammaConversionModel.hh.

Referenced by Initialise(), SampleSecondaries(), and ~G4PolarizedGammaConversionModel().

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The documentation for this class was generated from the following files:

• G4PolarizedGammaConversionModel.hh
• G4PolarizedGammaConversionModel.cc