#include <G4OpRayleigh.hh>

Inheritance diagram for G4OpRayleigh:

Public Member Functions
	G4OpRayleigh (const G4String &processName="OpRayleigh", G4ProcessType type=fOptical)

	~G4OpRayleigh ()

G4bool	IsApplicable (const G4ParticleDefinition &aParticleType)

void	BuildPhysicsTable (const G4ParticleDefinition &aParticleType)

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

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

G4PhysicsTable *	GetPhysicsTable () const

void	DumpPhysicsTable () const

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	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 &)

Protected Attributes
G4PhysicsTable *	thePhysicsTable

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

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 ()

Detailed Description

Definition at line 76 of file G4OpRayleigh.hh.

Constructor & Destructor Documentation

G4OpRayleigh::G4OpRayleigh	(	const G4String &	processName = `"OpRayleigh"`,
		G4ProcessType	type = `fOptical`
	)

Definition at line 82 of file G4OpRayleigh.cc.

References fOpRayleigh, G4cout, G4endl, G4VProcess::GetProcessName(), G4VProcess::SetProcessSubType(), thePhysicsTable, and G4VProcess::verboseLevel.

            : G4VDiscreteProcess(processName, type)
 {
         SetProcessSubType(fOpRayleigh);
 
         thePhysicsTable = NULL;
 
         DefaultWater = false;
 
         if (verboseLevel>0) {
            G4cout << GetProcessName() << " is created " << G4endl;
         }
 }

G4OpRayleigh::~G4OpRayleigh ( )

Definition at line 104 of file G4OpRayleigh.cc.

References G4PhysicsTable::clearAndDestroy(), and thePhysicsTable.

 {
         if (thePhysicsTable!= NULL) {
            thePhysicsTable->clearAndDestroy();
            delete thePhysicsTable;
         }
 }

Member Function Documentation

void G4OpRayleigh::BuildPhysicsTable ( const G4ParticleDefinition & aParticleType )

virtual

Reimplemented from G4VProcess.

Definition at line 116 of file G4OpRayleigh.cc.

References thePhysicsTable.

 {
     if (!thePhysicsTable) BuildThePhysicsTable();
 }

void G4OpRayleigh::DumpPhysicsTable ( ) const

inline

Definition at line 166 of file G4OpRayleigh.hh.

References G4PhysicsOrderedFreeVector::DumpValues(), G4PhysicsTable::entries(), thePhysicsTable, and test::v.

 {
         G4int PhysicsTableSize = thePhysicsTable->entries();
         G4PhysicsOrderedFreeVector *v;
 
         for (G4int i = 0 ; i < PhysicsTableSize ; i++ )
         {
                 v = (G4PhysicsOrderedFreeVector*)(*thePhysicsTable)[i];
                 v->DumpValues();
         }
 }

G4double G4OpRayleigh::GetMeanFreePath	(	const G4Track &	aTrack,
		G4double	,
		G4ForceCondition *
	)

virtual

Implements G4VDiscreteProcess.

Definition at line 265 of file G4OpRayleigh.cc.

References DBL_MAX, G4Track::GetDynamicParticle(), G4Material::GetIndex(), G4Track::GetMaterial(), G4Material::GetMaterialPropertiesTable(), G4Material::GetName(), G4MaterialPropertiesTable::GetProperty(), and G4DynamicParticle::GetTotalEnergy().

 {
         const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
         const G4Material* aMaterial = aTrack.GetMaterial();
 
         G4double thePhotonEnergy = aParticle->GetTotalEnergy();
 
         G4double AttenuationLength = DBL_MAX;
 
         if (aMaterial->GetName() == "Water" && DefaultWater){
 
            G4bool isOutRange;
 
            AttenuationLength =
                 (*thePhysicsTable)(aMaterial->GetIndex())->
                            GetValue(thePhotonEnergy, isOutRange);
         }
         else {
 
            G4MaterialPropertiesTable* aMaterialPropertyTable =
                            aMaterial->GetMaterialPropertiesTable();
 
            if(aMaterialPropertyTable){
              G4MaterialPropertyVector* AttenuationLengthVector =
                    aMaterialPropertyTable->GetProperty("RAYLEIGH");
              if(AttenuationLengthVector){
                AttenuationLength = AttenuationLengthVector ->
                                     Value(thePhotonEnergy);
              }
              else{
 //               G4cout << "No Rayleigh scattering length specified" << G4endl;
              }
            }
            else{
 //             G4cout << "No Rayleigh scattering length specified" << G4endl; 
            }
         }
 
         return AttenuationLength;
 }

G4PhysicsTable * G4OpRayleigh::GetPhysicsTable ( ) const

inline

Definition at line 179 of file G4OpRayleigh.hh.

References thePhysicsTable.

 {
   return thePhysicsTable;
 }

G4bool G4OpRayleigh::IsApplicable ( const G4ParticleDefinition & aParticleType )

inlinevirtual

Reimplemented from G4VProcess.

Definition at line 160 of file G4OpRayleigh.hh.

References G4OpticalPhoton::OpticalPhoton().

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

G4VParticleChange * G4OpRayleigh::PostStepDoIt	(	const G4Track &	aTrack,
		const G4Step &	aStep
	)

virtual

Reimplemented from G4VDiscreteProcess.

Definition at line 125 of file G4OpRayleigh.cc.

References G4VProcess::aParticleChange, CLHEP::Hep3Vector::dot(), G4cout, G4endl, G4UniformRand, G4Track::GetDynamicParticle(), G4DynamicParticle::GetMomentumDirection(), G4ParticleChange::GetMomentumDirection(), G4ParticleChange::GetPolarization(), G4DynamicParticle::GetPolarization(), G4ParticleChange::Initialize(), CLHEP::Hep3Vector::mag(), G4VDiscreteProcess::PostStepDoIt(), G4ParticleChange::ProposeMomentumDirection(), G4ParticleChange::ProposePolarization(), CLHEP::Hep3Vector::rotateUz(), CLHEP::Hep3Vector::set(), python.hepunit::twopi, CLHEP::Hep3Vector::unit(), and G4VProcess::verboseLevel.

 {
         aParticleChange.Initialize(aTrack);
 
         const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
 
         if (verboseLevel>0) {
                 G4cout << "Scattering Photon!" << G4endl;
                 G4cout << "Old Momentum Direction: "
                        << aParticle->GetMomentumDirection() << G4endl;
                 G4cout << "Old Polarization: "
                        << aParticle->GetPolarization() << G4endl;
         }
 
         G4double cosTheta;
         G4ThreeVector OldMomentumDirection, NewMomentumDirection;
         G4ThreeVector OldPolarization, NewPolarization;
 
         do {
            // Try to simulate the scattered photon momentum direction
            // w.r.t. the initial photon momentum direction
 
            G4double CosTheta = G4UniformRand();
            G4double SinTheta = std::sqrt(1.-CosTheta*CosTheta);
            // consider for the angle 90-180 degrees
            if (G4UniformRand() < 0.5) CosTheta = -CosTheta;
 
            // simulate the phi angle
            G4double rand = twopi*G4UniformRand();
            G4double SinPhi = std::sin(rand);
            G4double CosPhi = std::cos(rand);
 
            // start constructing the new momentum direction
        G4double unit_x = SinTheta * CosPhi; 
        G4double unit_y = SinTheta * SinPhi;  
        G4double unit_z = CosTheta; 
        NewMomentumDirection.set (unit_x,unit_y,unit_z);
 
            // Rotate the new momentum direction into global reference system
            OldMomentumDirection = aParticle->GetMomentumDirection();
            OldMomentumDirection = OldMomentumDirection.unit();
            NewMomentumDirection.rotateUz(OldMomentumDirection);
            NewMomentumDirection = NewMomentumDirection.unit();
 
            // calculate the new polarization direction
            // The new polarization needs to be in the same plane as the new
            // momentum direction and the old polarization direction
            OldPolarization = aParticle->GetPolarization();
            G4double constant = -1./NewMomentumDirection.dot(OldPolarization);
 
            NewPolarization = NewMomentumDirection + constant*OldPolarization;
            NewPolarization = NewPolarization.unit();
 
            // There is a corner case, where the Newmomentum direction
            // is the same as oldpolariztion direction:
            // random generate the azimuthal angle w.r.t. Newmomentum direction
            if (NewPolarization.mag() == 0.) {
               rand = G4UniformRand()*twopi;
               NewPolarization.set(std::cos(rand),std::sin(rand),0.);
               NewPolarization.rotateUz(NewMomentumDirection);
            } else {
               // There are two directions which are perpendicular
               // to the new momentum direction
               if (G4UniformRand() < 0.5) NewPolarization = -NewPolarization;
            }
       
        // simulate according to the distribution cos^2(theta)
            cosTheta = NewPolarization.dot(OldPolarization);
         } while (std::pow(cosTheta,2) < G4UniformRand());
 
         aParticleChange.ProposePolarization(NewPolarization);
         aParticleChange.ProposeMomentumDirection(NewMomentumDirection);
 
         if (verboseLevel>0) {
                 G4cout << "New Polarization: " 
                      << NewPolarization << G4endl;
                 G4cout << "Polarization Change: "
                      << *(aParticleChange.GetPolarization()) << G4endl;  
                 G4cout << "New Momentum Direction: " 
                      << NewMomentumDirection << G4endl;
                 G4cout << "Momentum Change: "
                      << *(aParticleChange.GetMomentumDirection()) << G4endl; 
         }
 
         return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
 }

Field Documentation

G4PhysicsTable* G4OpRayleigh::thePhysicsTable

protected

Definition at line 144 of file G4OpRayleigh.hh.

Referenced by BuildPhysicsTable(), DumpPhysicsTable(), G4OpRayleigh(), GetPhysicsTable(), and ~G4OpRayleigh().

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

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Field Documentation