G4MicroElecSurface Class Reference

#include <G4MicroElecSurface.hh>

Inheritance diagram for G4MicroElecSurface:

Public Member Functions
	G4MicroElecSurface (const G4String &processName="MicroElecSurface", G4ProcessType type=fElectromagnetic)
	~G4MicroElecSurface () override
G4bool	IsApplicable (const G4ParticleDefinition &aParticleType) override
void	SetFlagFranchissement ()
G4double	GetMeanFreePath (const G4Track &, G4double, G4ForceCondition *condition) override
G4VParticleChange *	PostStepDoIt (const G4Track &aTrack, const G4Step &aStep) override
void	BuildPhysicsTable (const G4ParticleDefinition &) override
G4MicroElecSurfaceStatus	GetStatus () const
	G4MicroElecSurface (const G4MicroElecSurface &right)=delete
G4MicroElecSurface &	operator= (const G4MicroElecSurface &right)=delete
void	Initialise ()
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	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 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 90 of file G4MicroElecSurface.hh.

Constructor & Destructor Documentation

G4MicroElecSurface() [1/2]

G4MicroElecSurface::G4MicroElecSurface ( const G4String & processName = "MicroElecSurface", G4ProcessType type = fElectromagnetic )

explicit

Definition at line 59 of file G4MicroElecSurface.cc.

  : G4VDiscreteProcess(processName, type),
    oldMomentum(0.,0.,0.), previousMomentum(0.,0.,0.),
    theGlobalNormal(0.,0.,0.), theFacetNormal(0.,0.,0.)
{
  if ( verboseLevel > 0) 
  {
    G4cout << GetProcessName() << " is created " << G4endl;
  }
  
  isInitialised=false;
  SetProcessSubType(fSurfaceReflection);
  
  theStatus = UndefinedSurf;
  material1 = nullptr;
  material2 = nullptr;
  
  kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance(); 
  theParticleMomentum = 0.;
  
  flag_franchissement_surface = false;
  flag_normal = false;
  flag_reflexion = false;
  teleportToDo = teleportDone = false;
 
  ekint = thetat = thetaft = energyThreshold = crossingProbability = 0.0;
}

~G4MicroElecSurface()

G4MicroElecSurface::~G4MicroElecSurface ( )

override

Definition at line 89 of file G4MicroElecSurface.cc.

{}

G4MicroElecSurface() [2/2]

G4MicroElecSurface::G4MicroElecSurface ( const G4MicroElecSurface & right )

delete

Member Function Documentation

BuildPhysicsTable()

void G4MicroElecSurface::BuildPhysicsTable ( const G4ParticleDefinition & )

overridevirtual

Reimplemented from G4VProcess.

Definition at line 132 of file G4MicroElecSurface.cc.

{
  if (isInitialised) { return; }
  
  G4ProductionCutsTable* theCoupleTable =
    G4ProductionCutsTable::GetProductionCutsTable();
  G4int numOfCouples = (G4int)theCoupleTable->GetTableSize();
  G4cout << "G4MicroElecSurface::Initialise: Ncouples= " 
         << numOfCouples << G4endl;
  
  for (G4int i = 0; i < numOfCouples; ++i)
  {
    const G4Material* material =
      theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
    
    G4cout << "G4Surface, Material " << i + 1 << " / "
           << numOfCouples << " : " << material->GetName() << G4endl;
    if (material->GetName() == "Vacuum")
    {
      tableWF[material->GetName()] = 0;
      continue;
    }
    G4String mat = material->GetName();
    G4MicroElecMaterialStructure str = G4MicroElecMaterialStructure(mat);
    tableWF[mat] = str.GetWorkFunction();
  }
  isInitialised = true;
}

GetMeanFreePath()

G4double G4MicroElecSurface::GetMeanFreePath ( const G4Track & , G4double , G4ForceCondition * condition )

overridevirtual

Implements G4VDiscreteProcess.

Definition at line 444 of file G4MicroElecSurface.cc.

{ 
  *condition = Forced;
  return  DBL_MAX;   
}

GetStatus()

G4MicroElecSurfaceStatus G4MicroElecSurface::GetStatus

(

)

const

Definition at line 529 of file G4MicroElecSurface.cc.

{ 
  return theStatus; 
} 

Initialise()

void G4MicroElecSurface::Initialise

(

)

Definition at line 102 of file G4MicroElecSurface.cc.

{
  if (isInitialised) { return; }
 
  G4ProductionCutsTable* theCoupleTable =
    G4ProductionCutsTable::GetProductionCutsTable();
  G4int numOfCouples = (G4int)theCoupleTable->GetTableSize();
  G4cout << numOfCouples << G4endl;
 
  for (G4int i = 0; i < numOfCouples; ++i)
  {
    const G4Material* material =
      theCoupleTable->GetMaterialCutsCouple(i)->GetMaterial();
 
    G4cout << this->GetProcessName() << ", Material " << i + 1
           << " / " << numOfCouples << " : " << material->GetName() << G4endl;
    if (material->GetName() == "Vacuum")
    {
      tableWF[material->GetName()] = 0; continue;
    }
    G4String mat = material->GetName();
    G4MicroElecMaterialStructure str = G4MicroElecMaterialStructure(mat);
    tableWF[mat] = str.GetWorkFunction();
  }
 
  isInitialised = true;
}

Referenced by PostStepDoIt().

IsApplicable()

G4bool G4MicroElecSurface::IsApplicable ( const G4ParticleDefinition & aParticleType )

overridevirtual

Reimplemented from G4VProcess.

Definition at line 95 of file G4MicroElecSurface.cc.

{ 
  return ( aParticleType.GetPDGEncoding() == 11 ); 
} 

operator=()

G4MicroElecSurface & G4MicroElecSurface::operator= ( const G4MicroElecSurface & right )

delete

PostStepDoIt()

G4VParticleChange * G4MicroElecSurface::PostStepDoIt ( const G4Track & aTrack, const G4Step & aStep )

overridevirtual

Reimplemented from G4VDiscreteProcess.

Definition at line 163 of file G4MicroElecSurface.cc.

{
    
  if (!isInitialised) { Initialise(); }
  theStatus = UndefinedSurf;
    
  // Definition of the parameters for the particle
  aParticleChange.Initialize(aTrack);
  aParticleChange.ProposeVelocity(aTrack.GetVelocity());
    
  G4StepPoint* pPreStepPoint  = aStep.GetPreStepPoint();
  G4StepPoint* pPostStepPoint = aStep.GetPostStepPoint();
    
  material1 = pPreStepPoint  -> GetMaterial();
  material2 = pPostStepPoint -> GetMaterial();
 
  theStatus = UndefinedSurf;
 
  const G4DynamicParticle* aParticle = aTrack.GetDynamicParticle();
 
  theParticleMomentum = aParticle->GetTotalMomentum();
  previousMomentum = oldMomentum;
  oldMomentum = aParticle->GetMomentumDirection(); 
 
    
  // Fisrt case: not a boundary
  if (pPostStepPoint->GetStepStatus() != fGeomBoundary
      || pPostStepPoint->GetPhysicalVolume()->GetName() == pPreStepPoint->GetPhysicalVolume()->GetName())
  {
    theStatus = NotAtBoundarySurf;
    flag_franchissement_surface = false;
    flag_reflexion = false;
    return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
  }
  theStatus = UndefinedSurf;
 
  // Third case: same material  
  if (material1 == material2)
  {
    theStatus = SameMaterialSurf;
    return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
  }
  if (verboseLevel > 3)
  {
    G4cout << G4endl << " Electron at Boundary! " << G4endl;
    G4VPhysicalVolume* thePrePV = pPreStepPoint->GetPhysicalVolume();
    G4VPhysicalVolume* thePostPV = pPostStepPoint->GetPhysicalVolume();
    if (thePrePV)  G4cout << " thePrePV:  " << thePrePV->GetName() << G4endl;
    if (thePostPV) G4cout << " thePostPV: " << thePostPV->GetName() << G4endl;
    G4cout << " Old Momentum Direction: " << oldMomentum << G4endl;
  }
 
  // Definition of the parameters for the surface
  G4ThreeVector theGlobalPoint = pPostStepPoint->GetPosition();
 
  G4Navigator* theNavigator = G4TransportationManager::
    GetTransportationManager()->GetNavigatorForTracking();
 
  G4bool valid;
  theGlobalNormal = theNavigator->GetGlobalExitNormal(theGlobalPoint, &valid);
 
  if (valid)
  {
    theGlobalNormal = -theGlobalNormal;
  }
  else
  {
    G4ExceptionDescription ed;
    ed << " G4MicroElecSurface/PostStepDoIt(): "
       << " The Navigator reports that it returned an invalid normal"
       << G4endl;
    G4Exception("G4MuElecSurf::PostStepDoIt", "OpBoun01",
                EventMustBeAborted, ed,
                "Invalid Surface Normal - Geometry must return valid surface normal");
  }
 
  // Exception: the particle is not in the right direction
  if (oldMomentum * theGlobalNormal > 0.0)
  {
    theGlobalNormal = -theGlobalNormal;
  }
    
  if (aTrack.GetStepLength()<=kCarTolerance/2 * 0.0000000001)
  {
    if (flag_reflexion == true)
    {
      flag_reflexion = false;
      return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
    }
 
    theStatus = StepTooSmallSurf;
 
    G4double energyThreshold_surface = 0.0*eV;
 
    WorkFunctionTable::iterator postStepWF;
    postStepWF = tableWF.find(pPostStepPoint->GetMaterial()->GetName());
    WorkFunctionTable::iterator preStepWF;
    preStepWF = tableWF.find(pPreStepPoint->GetMaterial()->GetName());
 
    if (postStepWF == tableWF.end())
    {
      G4String str = "Material ";
      str += pPostStepPoint->GetMaterial()->GetName() + " not found!";
      G4Exception("G4Surface::G4Surface", "em0002", FatalException, str);
      return nullptr;
    }
    else if (preStepWF == tableWF.end())
    {
      G4String str = "Material ";
      str += pPreStepPoint->GetMaterial()->GetName() + " not found!";
      G4Exception("G4Surface::G4Surface", "em0002", FatalException, str);
      return nullptr;
    }
    else
    {
      G4double thresholdNew_surface = postStepWF->second;
      G4double thresholdOld_surface = preStepWF->second;
      energyThreshold_surface = thresholdNew_surface - thresholdOld_surface;
    }
 
    if (flag_franchissement_surface == true)
    {
      aParticleChange.ProposeEnergy(aStep.GetPostStepPoint()->GetKineticEnergy() + energyThreshold_surface);
      flag_franchissement_surface = false;
    }
    if (flag_reflexion == true && flag_normal == true)
    {
      aParticleChange.ProposeMomentumDirection(-Reflexion(aStep.GetPostStepPoint()));
      flag_reflexion = false;
      flag_normal = false;
    }
    return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
  }
        
  flag_normal = (theGlobalNormal == G4ThreeVector(0, 0, 1)
              || theGlobalNormal == G4ThreeVector(0, 0, -1));
 
  G4LogicalSurface* Surface = nullptr;
    
  Surface = G4LogicalBorderSurface::GetSurface
                  (pPreStepPoint ->GetPhysicalVolume(),
                   pPostStepPoint->GetPhysicalVolume());
 
  if (Surface == nullptr)
  {
    G4bool enteredDaughter=(pPostStepPoint->GetPhysicalVolume()->GetMotherLogical()
                         == pPreStepPoint->GetPhysicalVolume()->GetLogicalVolume());
    if(enteredDaughter)
    {
      Surface = G4LogicalSkinSurface::GetSurface
                (pPostStepPoint->GetPhysicalVolume()->GetLogicalVolume());
 
      if(Surface == nullptr)
      Surface = G4LogicalSkinSurface::GetSurface
                (pPreStepPoint->GetPhysicalVolume()->GetLogicalVolume());
    }
    else 
    {
      Surface = G4LogicalSkinSurface::GetSurface
                (pPreStepPoint->GetPhysicalVolume()->GetLogicalVolume());
 
      if(Surface == nullptr)
      Surface = G4LogicalSkinSurface::GetSurface
                (pPostStepPoint->GetPhysicalVolume()->GetLogicalVolume());
    }
  }
 
  // Definition of the parameters for the surface crossing      
  G4VPhysicalVolume* thePrePV = pPreStepPoint->GetPhysicalVolume();
  G4VPhysicalVolume* thePostPV = pPostStepPoint->GetPhysicalVolume();
      
  energyThreshold = 0.0*eV; 
  G4double energyDelta = 0;
 
  if ((thePrePV)&&(thePostPV))
  {
    WorkFunctionTable::iterator postStepWF;
    postStepWF = tableWF.find(thePostPV->GetLogicalVolume()->GetMaterial()->GetName());
    WorkFunctionTable::iterator preStepWF;
    preStepWF = tableWF.find(thePrePV->GetLogicalVolume()->GetMaterial()->GetName());
 
    if (postStepWF == tableWF.end())
    {
      G4String str = "Material ";
      str += thePostPV->GetLogicalVolume()->GetMaterial()->GetName() + " not found!";
      G4Exception("G4Surface::G4Surface", "em0002", FatalException, str);
      return nullptr;
    }
    else if (preStepWF == tableWF.end())
    {
      G4String str = "Material ";
      str += thePrePV->GetLogicalVolume()->GetMaterial()->GetName() + " not found!";
      G4Exception("G4Surface::G4Surface", "em0002", FatalException, str);
      return nullptr;
    }
    else
    {
      G4double thresholdNew = postStepWF->second;
      G4double thresholdOld = preStepWF->second;
 
      energyThreshold = thresholdNew - thresholdOld;
      energyDelta = thresholdOld- thresholdNew;
    }
  }
 
  ekint=aStep.GetPostStepPoint()->GetKineticEnergy();
  thetat= GetIncidentAngle(); //angle d'incidence
  G4double ekinNormalt=ekint*std::cos(thetat)*std::cos(thetat); 
    
  thetaft=std::asin(std::sqrt(ekint/(ekint+energyThreshold))*std::sin(thetat));//Angle de refraction
  if(std::sqrt(ekint/(ekint+energyThreshold))*std::sin(thetat)>1.0) 
  {
    thetaft=std::asin(1.0);
  }
    
  G4double aleat=G4UniformRand();   
 
  G4double waveVectort=std::sqrt(2*9.1093826E-31*1.602176487E-19)/(6.6260755E-34/(2.0*pi));
 
  // Parameter for an exponential barrier of potential (Thesis P68)
  G4double at=0.5E-10;
 
  crossingProbability=0;
    
  G4double kft=waveVectort*std::sqrt(ekint+energyThreshold)*std::cos(thetaft);
  G4double kit=waveVectort*std::sqrt(ekinNormalt); 
 
  crossingProbability=1-(std::pow(std::sinh(pi*at*(kit-kft)), 2.0)/std::pow(std::sinh(pi*at*(kit+kft)), 2.0));
 
  // First case: the electron crosses the surface
  if((aleat<=crossingProbability)&&(ekint> energyDelta))
  {
    if (aStep.GetPreStepPoint()->GetMaterial()->GetName()
     != aStep.GetPostStepPoint()->GetMaterial()->GetName())
    {
      aParticleChange.ProposeEnergy(ekint - energyDelta);
      flag_franchissement_surface = true;
    }
 
    thetaft=std::abs(thetaft-thetat);
 
    G4ThreeVector zVerst = aStep.GetPostStepPoint()->GetMomentumDirection();
    G4ThreeVector xVerst = zVerst.orthogonal();
    G4ThreeVector yVerst = zVerst.cross(xVerst);
 
    G4double xDirt = std::sqrt(1. - std::cos(thetaft)*std::cos(thetaft));
    G4double yDirt = xDirt;
 
    G4ThreeVector zPrimeVerst=((xDirt*xVerst + yDirt*yVerst + std::cos(thetaft)*zVerst));
        
    aParticleChange.ProposeMomentumDirection(zPrimeVerst.unit());
  }
  else if ((aleat > crossingProbability) && (ekint> energyDelta))
  {
    flag_reflexion = true;
    if (flag_normal)
    {
      aParticleChange.ProposeMomentumDirection(-oldMomentum.unit());
    }
    else
    {
      aParticleChange.ProposeMomentumDirection(Reflexion(aStep.GetPostStepPoint()));
    }
  }
  else
  {
    if (flag_normal)
    {
      aParticleChange.ProposeMomentumDirection(-oldMomentum.unit());
    }
    else
    {
      aParticleChange.ProposeMomentumDirection(Reflexion(aStep.GetPostStepPoint()));
    }
    flag_reflexion = true;
  }
  return G4VDiscreteProcess::PostStepDoIt(aTrack, aStep);
}

SetFlagFranchissement()

void G4MicroElecSurface::SetFlagFranchissement

(

)

Definition at line 537 of file G4MicroElecSurface.cc.

{ 
  flag_franchissement_surface = false; 
} 

---

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

• G4MicroElecSurface.hh
• G4MicroElecSurface.cc