#include <G4LivermorePolarizedRayleighModel.hh>

Inheritance diagram for G4LivermorePolarizedRayleighModel:

Public Member Functions
	G4LivermorePolarizedRayleighModel (const G4ParticleDefinition *p=0, const G4String &nam="LivermorePolarizedRayleigh")

virtual	~G4LivermorePolarizedRayleighModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)

virtual G4double	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0, G4double cut=0, G4double emax=DBL_MAX)

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin, G4double maxEnergy)

Public Member Functions inherited from G4VEmModel
	G4VEmModel (const G4String &nam)

virtual	~G4VEmModel ()

virtual void	Initialise (const G4ParticleDefinition *, const G4DataVector &)=0

virtual void	SampleSecondaries (std::vector< G4DynamicParticle * > , const G4MaterialCutsCouple , const G4DynamicParticle *, G4double tmin=0.0, G4double tmax=DBL_MAX)=0

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	ComputeCrossSectionPerAtom (const G4ParticleDefinition *, G4double kinEnergy, G4double Z, G4double A=0., 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 )

virtual void	SetupForMaterial (const G4ParticleDefinition , const G4Material , G4double kineticEnergy)

virtual void	DefineForRegion (const G4Region *)

void	InitialiseElementSelectors (const G4ParticleDefinition *, const G4DataVector &)

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)

void	SetParticleChange (G4VParticleChange , G4VEmFluctuationModel f=0)

void	SetCrossSectionTable (G4PhysicsTable *)

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

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	ForceBuildTable (G4bool val)

G4double	MaxSecondaryKinEnergy (const G4DynamicParticle *dynParticle)

const G4String &	GetName () const

void	SetCurrentCouple (const G4MaterialCutsCouple *)

const G4Element *	GetCurrentElement () const

Protected Attributes
G4ParticleChangeForGamma *	fParticleChange

Protected Attributes inherited from G4VEmModel
G4VParticleChange *	pParticleChange

G4PhysicsTable *	xSectionTable

const std::vector< G4double > *	theDensityFactor

const std::vector< G4int > *	theDensityIdx

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 43 of file G4LivermorePolarizedRayleighModel.hh.

Constructor & Destructor Documentation

◆ G4LivermorePolarizedRayleighModel()

G4LivermorePolarizedRayleighModel::G4LivermorePolarizedRayleighModel	(	const G4ParticleDefinition *	p = `0`,
		const G4String &	nam = `"LivermorePolarizedRayleigh"`
	)

Definition at line 53 of file G4LivermorePolarizedRayleighModel.cc.

  :G4VEmModel(nam),fParticleChange(0),isInitialised(false),
   crossSectionHandler(0),formFactorData(0)
{
  lowEnergyLimit = 250 * eV; 
  highEnergyLimit = 100 * GeV;
  
  //SetLowEnergyLimit(lowEnergyLimit);
  SetHighEnergyLimit(highEnergyLimit);
  //
  verboseLevel= 0;
  // Verbosity scale:
  // 0 = nothing 
  // 1 = warning for energy non-conservation 
  // 2 = details of energy budget
  // 3 = calculation of cross sections, file openings, sampling of atoms
  // 4 = entering in methods
 
  if(verboseLevel > 0) {
    G4cout << "Livermore Polarized Rayleigh is constructed " << G4endl
         << "Energy range: "
         << lowEnergyLimit / eV << " eV - "
         << highEnergyLimit / GeV << " GeV"
         << G4endl;
  }
}

◆ ~G4LivermorePolarizedRayleighModel()

G4LivermorePolarizedRayleighModel::~G4LivermorePolarizedRayleighModel ( )

virtual

Definition at line 83 of file G4LivermorePolarizedRayleighModel.cc.

{  
  if (crossSectionHandler) delete crossSectionHandler;
  if (formFactorData) delete formFactorData;
}

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

G4double G4LivermorePolarizedRayleighModel::ComputeCrossSectionPerAtom	(	const G4ParticleDefinition *	,
		G4double	kinEnergy,
		G4double	Z,
		G4double	A = `0`,
		G4double	cut = `0`,
		G4double	emax = `DBL_MAX`
	)

virtual

Reimplemented from G4VEmModel.

Definition at line 145 of file G4LivermorePolarizedRayleighModel.cc.

{
  if (verboseLevel > 3)
    G4cout << "Calling CrossSectionPerAtom() of G4LivermorePolarizedRayleighModel" << G4endl;
 
  if (GammaEnergy < lowEnergyLimit || GammaEnergy > highEnergyLimit) return 0.0;
 
  G4double cs = crossSectionHandler->FindValue(G4int(Z), GammaEnergy);
  return cs;
}

◆ Initialise()

void G4LivermorePolarizedRayleighModel::Initialise	(	const G4ParticleDefinition *	particle,
		const G4DataVector &	cuts
	)

virtual

Implements G4VEmModel.

Definition at line 91 of file G4LivermorePolarizedRayleighModel.cc.

{
// Rayleigh process:                      The Quantum Theory of Radiation
//                                        W. Heitler,       Oxford at the Clarendon Press, Oxford (1954)                                                 
// Scattering function:                   A simple model of photon transport
//                                        D.E. Cullen,      Nucl. Instr. Meth. in Phys. Res. B 101 (1995) 499-510                                       
// Polarization of the outcoming photon:  Beam test of a prototype detector array for the PoGO astronomical hard X-ray/soft gamma-ray polarimeter
//                                        T. Mizuno et al., Nucl. Instr. Meth. in Phys. Res. A 540 (2005) 158-168                                        
 
  if (verboseLevel > 3)
    G4cout << "Calling G4LivermorePolarizedRayleighModel::Initialise()" << G4endl;
 
  if (crossSectionHandler)
  {
    crossSectionHandler->Clear();
    delete crossSectionHandler;
  }
  
  // Read data files for all materials
 
  crossSectionHandler = new G4CrossSectionHandler;
  crossSectionHandler->Clear();
  G4String crossSectionFile = "rayl/re-cs-";
  crossSectionHandler->LoadData(crossSectionFile);
 
  G4VDataSetAlgorithm* ffInterpolation = new G4LogLogInterpolation;
  G4String formFactorFile = "rayl/re-ff-";
  formFactorData = new G4CompositeEMDataSet(ffInterpolation,1.,1.);
  formFactorData->LoadData(formFactorFile);
 
  InitialiseElementSelectors(particle,cuts);
 
  //
  if (verboseLevel > 2) 
    G4cout << "Loaded cross section files for Livermore Polarized Rayleigh model" << G4endl;
 
  InitialiseElementSelectors(particle,cuts);
 
  if (verboseLevel > 0) { 
    G4cout << "Livermore Polarized Rayleigh model is initialized " << G4endl
         << "Energy range: "
         << LowEnergyLimit() / eV << " eV - "
         << HighEnergyLimit() / GeV << " GeV"
         << G4endl;
     }
 
  if(isInitialised) return;
  fParticleChange = GetParticleChangeForGamma();
  isInitialised = true;
}

◆ SampleSecondaries()

void G4LivermorePolarizedRayleighModel::SampleSecondaries	(	std::vector< G4DynamicParticle * > *	,
		const G4MaterialCutsCouple *	couple,
		const G4DynamicParticle *	aDynamicGamma,
		G4double	tmin,
		G4double	maxEnergy
	)

virtual

Implements G4VEmModel.

Definition at line 162 of file G4LivermorePolarizedRayleighModel.cc.

{
  if (verboseLevel > 3)
    G4cout << "Calling SampleSecondaries() of G4LivermorePolarizedRayleighModel" << G4endl;
 
  G4double photonEnergy0 = aDynamicGamma->GetKineticEnergy();
  
  if (photonEnergy0 <= lowEnergyLimit)
  {
      fParticleChange->ProposeTrackStatus(fStopAndKill);
      fParticleChange->SetProposedKineticEnergy(0.);
      fParticleChange->ProposeLocalEnergyDeposit(photonEnergy0);
      return ;
  }
 
  G4ParticleMomentum photonDirection0 = aDynamicGamma->GetMomentumDirection();
 
  // Select randomly one element in the current material
  // G4int Z = crossSectionHandler->SelectRandomAtom(couple,photonEnergy0);
  const G4ParticleDefinition* particle =  aDynamicGamma->GetDefinition();
  const G4Element* elm = SelectRandomAtom(couple,particle,photonEnergy0);
  G4int Z = (G4int)elm->GetZ();
 
  G4double outcomingPhotonCosTheta = GenerateCosTheta(photonEnergy0, Z);
  G4double outcomingPhotonPhi = GeneratePhi(outcomingPhotonCosTheta);
  G4double beta=GeneratePolarizationAngle();
 
  // incomingPhoton reference frame:
  // z = versor parallel to the incomingPhotonDirection
  // x = versor parallel to the incomingPhotonPolarization
  // y = defined as z^x
 
  // outgoingPhoton reference frame:
  // z' = versor parallel to the outgoingPhotonDirection
  // x' = defined as x-x*z'z' normalized
  // y' = defined as z'^x'
 
  G4ThreeVector z(aDynamicGamma->GetMomentumDirection().unit()); 
  G4ThreeVector x(GetPhotonPolarization(*aDynamicGamma));
  G4ThreeVector y(z.cross(x));
 
  // z' = std::cos(phi)*std::sin(theta) x + std::sin(phi)*std::sin(theta) y + std::cos(theta) z
  G4double xDir;
  G4double yDir;
  G4double zDir;
  zDir=outcomingPhotonCosTheta;
  xDir=std::sqrt(1-outcomingPhotonCosTheta*outcomingPhotonCosTheta);
  yDir=xDir;
  xDir*=std::cos(outcomingPhotonPhi);
  yDir*=std::sin(outcomingPhotonPhi);
 
  G4ThreeVector zPrime((xDir*x + yDir*y + zDir*z).unit());
  G4ThreeVector xPrime(x.perpPart(zPrime).unit());
  G4ThreeVector yPrime(zPrime.cross(xPrime));
 
  // outgoingPhotonPolarization is directed as x' std::cos(beta) + y' std::sin(beta)
  G4ThreeVector outcomingPhotonPolarization(xPrime*std::cos(beta) + yPrime*std::sin(beta));
 
  fParticleChange->ProposeMomentumDirection(zPrime);
  fParticleChange->ProposePolarization(outcomingPhotonPolarization);
  fParticleChange->SetProposedKineticEnergy(photonEnergy0); 
 
}

Member Data Documentation

◆ fParticleChange

G4ParticleChangeForGamma* G4LivermorePolarizedRayleighModel::fParticleChange

protected

Definition at line 71 of file G4LivermorePolarizedRayleighModel.hh.

Referenced by Initialise(), and SampleSecondaries().

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

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4LivermorePolarizedRayleighModel()

◆ ~G4LivermorePolarizedRayleighModel()

Member Function Documentation

◆ ComputeCrossSectionPerAtom()

◆ Initialise()

◆ SampleSecondaries()

Member Data Documentation

◆ fParticleChange