#include <G4OpMieHG.hh>

Inheritance diagram for G4OpMieHG:

Collaboration diagram for G4OpMieHG:

Public Member Functions
	G4OpMieHG (const G4String &processName="OpMieHG", G4ProcessType type=fOptical)

	~G4OpMieHG ()

G4bool	IsApplicable (const G4ParticleDefinition &aParticleType)

G4double	GetMeanFreePath (const G4Track &aTrack, G4double, G4ForceCondition *)

G4VParticleChange *	PostStepDoIt (const G4Track &aTrack, const G4Step &aStep)

Public Member Functions inherited from G4VDiscreteProcess
	G4VDiscreteProcess (const G4String &, G4ProcessType aType=fNotDefined)

	G4VDiscreteProcess (G4VDiscreteProcess &)

virtual	~G4VDiscreteProcess ()

virtual G4double	PostStepGetPhysicalInteractionLength (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)

virtual G4double	AlongStepGetPhysicalInteractionLength (const G4Track &, G4double, G4double, G4double &, G4GPILSelection *)

virtual G4double	AtRestGetPhysicalInteractionLength (const G4Track &, G4ForceCondition *)

virtual G4VParticleChange *	AtRestDoIt (const G4Track &, const G4Step &)

virtual G4VParticleChange *	AlongStepDoIt (const G4Track &, const G4Step &)

Public Member Functions inherited from G4VProcess
	G4VProcess (const G4String &aName="NoName", G4ProcessType aType=fNotDefined)

	G4VProcess (const G4VProcess &right)

virtual	~G4VProcess ()

G4int	operator== (const G4VProcess &right) const

G4int	operator!= (const G4VProcess &right) const

G4double	GetCurrentInteractionLength () const

void	SetPILfactor (G4double value)

G4double	GetPILfactor () const

G4double	AlongStepGPIL (const G4Track &track, G4double previousStepSize, G4double currentMinimumStep, G4double &proposedSafety, G4GPILSelection *selection)

G4double	AtRestGPIL (const G4Track &track, G4ForceCondition *condition)

G4double	PostStepGPIL (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition)

virtual void	BuildPhysicsTable (const G4ParticleDefinition &)

virtual void	PreparePhysicsTable (const G4ParticleDefinition &)

virtual G4bool	StorePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)

virtual G4bool	RetrievePhysicsTable (const G4ParticleDefinition *, const G4String &, G4bool)

const G4String &	GetPhysicsTableFileName (const G4ParticleDefinition *, const G4String &directory, const G4String &tableName, G4bool ascii=false)

const G4String &	GetProcessName () const

G4ProcessType	GetProcessType () const

void	SetProcessType (G4ProcessType)

G4int	GetProcessSubType () const

void	SetProcessSubType (G4int)

virtual void	StartTracking (G4Track *)

virtual void	EndTracking ()

virtual void	SetProcessManager (const G4ProcessManager *)

virtual const G4ProcessManager *	GetProcessManager ()

virtual void	ResetNumberOfInteractionLengthLeft ()

G4double	GetNumberOfInteractionLengthLeft () const

G4double	GetTotalNumberOfInteractionLengthTraversed () const

G4bool	isAtRestDoItIsEnabled () const

G4bool	isAlongStepDoItIsEnabled () const

G4bool	isPostStepDoItIsEnabled () const

virtual void	DumpInfo () const

void	SetVerboseLevel (G4int value)

G4int	GetVerboseLevel () const

virtual void	SetMasterProcess (G4VProcess *masterP)

const G4VProcess *	GetMasterProcess () const

virtual void	BuildWorkerPhysicsTable (const G4ParticleDefinition &part)

virtual void	PrepareWorkerPhysicsTable (const G4ParticleDefinition &)

Additional Inherited Members
Static Public Member Functions inherited from G4VProcess
static const G4String &	GetProcessTypeName (G4ProcessType)

Protected Member Functions inherited from G4VProcess
void	SubtractNumberOfInteractionLengthLeft (G4double previousStepSize)

void	ClearNumberOfInteractionLengthLeft ()

Protected Attributes inherited from G4VProcess
const G4ProcessManager *	aProcessManager

G4VParticleChange *	pParticleChange

G4ParticleChange	aParticleChange

G4double	theNumberOfInteractionLengthLeft

G4double	currentInteractionLength

G4double	theInitialNumberOfInteractionLength

G4String	theProcessName

G4String	thePhysicsTableFileName

G4ProcessType	theProcessType

G4int	theProcessSubType

G4double	thePILfactor

G4bool	enableAtRestDoIt

G4bool	enableAlongStepDoIt

G4bool	enablePostStepDoIt

G4int	verboseLevel

Detailed Description

Definition at line 48 of file G4OpMieHG.hh.

Constructor & Destructor Documentation

G4OpMieHG::G4OpMieHG	(	const G4String &	processName = `"OpMieHG"`,
		G4ProcessType	type = `fOptical`
	)

Definition at line 47 of file G4OpMieHG.cc.

            : G4VDiscreteProcess(processName, type)
 {
         if (verboseLevel>0) {
            G4cout << GetProcessName() << " is created " << G4endl;
         }
 
         SetProcessSubType(fOpMieHG);
 }

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G4OpMieHG::~G4OpMieHG ( )

Definition at line 57 of file G4OpMieHG.cc.

57 {}

Member Function Documentation

G4double G4OpMieHG::GetMeanFreePath	(	const G4Track &	aTrack,
		G4double	,
		G4ForceCondition *
	)

virtual

Implements G4VDiscreteProcess.

Definition at line 159 of file G4OpMieHG.cc.

 {
         const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
         const G4Material* aMaterial = aTrack.GetMaterial();
 
         G4double thePhotonEnergy = aParticle->GetTotalEnergy();
 
         G4double AttenuationLength = DBL_MAX;
 
         G4MaterialPropertiesTable* aMaterialPropertyTable =
           aMaterial->GetMaterialPropertiesTable();
 
         if (aMaterialPropertyTable) {
            G4MaterialPropertyVector* AttenuationLengthVector =
                                  aMaterialPropertyTable->GetProperty("MIEHG");
            if (AttenuationLengthVector) {
               AttenuationLength = AttenuationLengthVector ->
                                     Value(thePhotonEnergy);
            } else {
 //              G4cout << "No Mie scattering length specified" << G4endl;
            }
         } else {
 //           G4cout << "No Mie scattering length specified" << G4endl; 
         }
 
 //  G4cout << thePhotonEnergy/GeV << " \t" << AttenuationLength/m << G4endl;
 
         return AttenuationLength;
 }

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G4bool G4OpMieHG::IsApplicable ( const G4ParticleDefinition & aParticleType )

inlinevirtual

Reimplemented from G4VProcess.

Definition at line 92 of file G4OpMieHG.hh.

 {
   return ( &aParticleType == G4OpticalPhoton::OpticalPhoton() );
 }

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G4VParticleChange * G4OpMieHG::PostStepDoIt	(	const G4Track &	aTrack,
		const G4Step &	aStep
	)

virtual

Reimplemented from G4VDiscreteProcess.

Definition at line 67 of file G4OpMieHG.cc.

 {
         aParticleChange.Initialize(aTrack);
 
         const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
     const G4Material* aMaterial = aTrack.GetMaterial();
     G4MaterialPropertiesTable* aMaterialPropertyTable =
       aMaterial->GetMaterialPropertiesTable();
 
     G4double forward_g =
               aMaterialPropertyTable->GetConstProperty("MIEHG_FORWARD");
     G4double backward_g =
               aMaterialPropertyTable->GetConstProperty("MIEHG_BACKWARD");
     G4double ForwardRatio =
               aMaterialPropertyTable->GetConstProperty("MIEHG_FORWARD_RATIO");
 
         if (verboseLevel>0) {
         G4cout << "MIE Scattering Photon!" << G4endl;
         G4cout << "MIE Old Momentum Direction: "
                  << aParticle->GetMomentumDirection() << G4endl;
         G4cout << "MIE Old Polarization: "
              << aParticle->GetPolarization() << G4endl;
     }
 
         G4double gg;
         G4int direction;
         if (G4UniformRand()<=ForwardRatio){
            gg = forward_g;
            direction = 1;
         } else {
            gg = backward_g;
            direction = -1;
     }
 
         G4double r = G4UniformRand();
 
         G4double Theta;
         //sample the direction
         if (gg!=0) {
           Theta = std::acos(2*r*(1+gg)*(1+gg)*(1-gg+gg*r)/((1-gg+2*gg*r)*(1-gg+2*gg*r)) -1);
         } else {
           Theta = std::acos(2*r-1.);
     }
         G4double Phi = G4UniformRand()*2*pi;
 
         if (direction==-1) Theta = pi - Theta; //backward scattering
 
         G4ThreeVector NewMomentumDirection, OldMomentumDirection;
         G4ThreeVector OldPolarization, NewPolarization;
 
         NewMomentumDirection.set
                        (std::sin(Theta)*std::cos(Phi), std::sin(Theta)*std::sin(Phi), std::cos(Theta));
         OldMomentumDirection = aParticle->GetMomentumDirection();
         NewMomentumDirection.rotateUz(OldMomentumDirection);
         NewMomentumDirection = NewMomentumDirection.unit();
 
         OldPolarization = aParticle->GetPolarization();
         G4double constant = -1./NewMomentumDirection.dot(OldPolarization);
 
         NewPolarization = NewMomentumDirection + constant*OldPolarization;
         NewPolarization = NewPolarization.unit();
 
         if (NewPolarization.mag()==0) {
            r = G4UniformRand()*twopi;
            NewPolarization.set(std::cos(r),std::sin(r),0.);
            NewPolarization.rotateUz(NewMomentumDirection);
         } else {
        // There are two directions which perpendicular
            // new momentum direction
            if (G4UniformRand() < 0.5) NewPolarization = -NewPolarization;
         }
 
         aParticleChange.ProposePolarization(NewPolarization);
         aParticleChange.ProposeMomentumDirection(NewMomentumDirection);
 
         if (verboseLevel>0) {
               G4cout << "MIE New Polarization: " 
                      << NewPolarization << G4endl;
               G4cout << "MIE Polarization Change: "
                      << *(aParticleChange.GetPolarization()) << G4endl;  
               G4cout << "MIE New Momentum Direction: " 
                      << NewMomentumDirection << G4endl;
               G4cout << "MIE Momentum Change: "
                      << *(aParticleChange.GetMomentumDirection()) << G4endl; 
         }
 
         return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
 }

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

geant4.10.03.p01/source/processes/optical/include/G4OpMieHG.hh
geant4.10.03.p01/source/processes/optical/src/G4OpMieHG.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation