G4OpMieHG Class Reference

#include <G4OpMieHG.hh>

Inheritance diagram for G4OpMieHG:

Public Member Functions
	G4OpMieHG (const G4String &processName="OpMieHG", G4ProcessType type=fOptical)
virtual	~G4OpMieHG ()
virtual G4bool	IsApplicable (const G4ParticleDefinition &aParticleType) override
virtual G4double	GetMeanFreePath (const G4Track &aTrack, G4double, G4ForceCondition *) override
virtual G4VParticleChange *	PostStepDoIt (const G4Track &aTrack, const G4Step &aStep) override
virtual void	PreparePhysicsTable (const G4ParticleDefinition &) override
virtual void	Initialise ()
void	SetVerboseLevel (G4int)
Public Member Functions inherited from G4VDiscreteProcess
	G4VDiscreteProcess (const G4String &aName, G4ProcessType aType=fNotDefined)
	G4VDiscreteProcess (G4VDiscreteProcess &)
virtual	~G4VDiscreteProcess ()
G4VDiscreteProcess &	operator= (const G4VDiscreteProcess &)=delete
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 &)
virtual G4double	GetCrossSection (const G4double, const G4MaterialCutsCouple *)
virtual G4double	MinPrimaryEnergy (const G4ParticleDefinition *, const G4Material *)
Public Member Functions inherited from G4VProcess
	G4VProcess (const G4String &aName="NoName", G4ProcessType aType=fNotDefined)
	G4VProcess (const G4VProcess &right)
virtual	~G4VProcess ()
G4VProcess &	operator= (const G4VProcess &)=delete
G4bool	operator== (const G4VProcess &right) const
G4bool	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 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 const G4VProcess *	GetCreatorProcess () const
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
virtual void	ProcessDescription (std::ostream &outfile) 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 G4VDiscreteProcess
Protected Member Functions inherited from G4VProcess
void	SubtractNumberOfInteractionLengthLeft (G4double prevStepSize)
void	ClearNumberOfInteractionLengthLeft ()
Protected Attributes inherited from G4VProcess
const G4ProcessManager *	aProcessManager = nullptr
G4VParticleChange *	pParticleChange = nullptr
G4ParticleChange	aParticleChange
G4double	theNumberOfInteractionLengthLeft = -1.0
G4double	currentInteractionLength = -1.0
G4double	theInitialNumberOfInteractionLength = -1.0
G4String	theProcessName
G4String	thePhysicsTableFileName
G4ProcessType	theProcessType = fNotDefined
G4int	theProcessSubType = -1
G4double	thePILfactor = 1.0
G4int	verboseLevel = 0
G4bool	enableAtRestDoIt = true
G4bool	enableAlongStepDoIt = true
G4bool	enablePostStepDoIt = true

Detailed Description

Definition at line 46 of file G4OpMieHG.hh.

Constructor & Destructor Documentation

G4OpMieHG()

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

explicit

Definition at line 47 of file G4OpMieHG.cc.

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

~G4OpMieHG()

G4OpMieHG::~G4OpMieHG ( )

virtualdefault

Member Function Documentation

GetMeanFreePath()

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

overridevirtual

Implements G4VDiscreteProcess.

Definition at line 168 of file G4OpMieHG.cc.

{
  G4double attLength = DBL_MAX;
  G4MaterialPropertiesTable* MPT =
    aTrack.GetMaterial()->GetMaterialPropertiesTable();
  if(MPT)
  {
    G4MaterialPropertyVector* attVector = MPT->GetProperty(kMIEHG);
    if(attVector)
    {
      attLength = attVector->Value(
        aTrack.GetDynamicParticle()->GetTotalEnergy(), idx_mie);
    }
  }
  return attLength;
}

Initialise()

void G4OpMieHG::Initialise ( )

virtual

Definition at line 68 of file G4OpMieHG.cc.

{
  SetVerboseLevel(G4OpticalParameters::Instance()->GetMieVerboseLevel());
}

Referenced by G4OpMieHG(), and PreparePhysicsTable().

IsApplicable()

G4bool G4OpMieHG::IsApplicable ( const G4ParticleDefinition & aParticleType )

inlineoverridevirtual

Reimplemented from G4VProcess.

Definition at line 77 of file G4OpMieHG.hh.

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

PostStepDoIt()

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

overridevirtual

Reimplemented from G4VDiscreteProcess.

Definition at line 74 of file G4OpMieHG.cc.

{
  aParticleChange.Initialize(aTrack);
 
  const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
  const G4MaterialPropertiesTable* MPT =
    aTrack.GetMaterial()->GetMaterialPropertiesTable();
 
  G4double forwardRatio = MPT->GetConstProperty(kMIEHG_FORWARD_RATIO);
 
  if(verboseLevel > 1)
  {
    G4cout << "OpMie Scattering Photon!" << G4endl
           << " Old Momentum Direction: " << aParticle->GetMomentumDirection()
           << G4endl
           << " MIE Old Polarization: " << aParticle->GetPolarization()
           << G4endl;
  }
 
  G4double gg;
  G4int direction;
  if(G4UniformRand() <= forwardRatio)
  {
    gg        = MPT->GetConstProperty(kMIEHG_FORWARD);
    direction = 1;
  }
  else
  {
    gg        = MPT->GetConstProperty(kMIEHG_BACKWARD);
    direction = -1;
  }
 
  G4double r = G4UniformRand();
 
  // sample the direction
  G4double theta;
  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() * twopi;
 
  if(direction == -1)
    theta = pi - theta;  // backward scattering
 
  G4ThreeVector newMomDir, oldMomDir;
  G4ThreeVector newPol, oldPol;
 
  G4double sinth = std::sin(theta);
  newMomDir.set(sinth * std::cos(phi), sinth * std::sin(phi), std::cos(theta));
  oldMomDir = aParticle->GetMomentumDirection();
  newMomDir.rotateUz(oldMomDir);
  newMomDir = newMomDir.unit();
 
  oldPol = aParticle->GetPolarization();
  newPol = newMomDir - oldPol / newMomDir.dot(oldPol);
  newPol = newPol.unit();
 
  if(newPol.mag() == 0.)
  {
    r = G4UniformRand() * twopi;
    newPol.set(std::cos(r), std::sin(r), 0.);
    newPol.rotateUz(newMomDir);
  }
  else
  {
    // There are two directions perpendicular to new momentum direction
    if(G4UniformRand() < 0.5)
      newPol = -newPol;
  }
 
  aParticleChange.ProposePolarization(newPol);
  aParticleChange.ProposeMomentumDirection(newMomDir);
 
  if(verboseLevel > 1)
  {
    G4cout << "OpMie New Polarization: " << newPol << G4endl
           << " Polarization Change: " << *(aParticleChange.GetPolarization())
           << G4endl << " New Momentum Direction: " << newMomDir << G4endl
           << " Momentum Change: " << *(aParticleChange.GetMomentumDirection())
           << G4endl;
  }
 
  return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}

PreparePhysicsTable()

void G4OpMieHG::PreparePhysicsTable ( const G4ParticleDefinition & )

overridevirtual

Reimplemented from G4VProcess.

Definition at line 62 of file G4OpMieHG.cc.

{
  Initialise();
}

SetVerboseLevel()

void G4OpMieHG::SetVerboseLevel

(

G4int

verbose

)

Definition at line 187 of file G4OpMieHG.cc.

{
  verboseLevel = verbose;
  G4OpticalParameters::Instance()->SetMieVerboseLevel(verboseLevel);
}

Referenced by Initialise().

---

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

• G4OpMieHG.hh
• G4OpMieHG.cc