#include <G4AdjointForcedInteractionForGamma.hh>

Inheritance diagram for G4AdjointForcedInteractionForGamma:

Public Member Functions
	G4AdjointForcedInteractionForGamma (const G4String &process_name)

	~G4AdjointForcedInteractionForGamma () override

void	BuildPhysicsTable (const G4ParticleDefinition &) override

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

G4VParticleChange *	PostStepDoIt (const G4Track &, const G4Step &) override

G4VParticleChange *	AlongStepDoIt (const G4Track &track, const G4Step &step) override

void	RegisterAdjointComptonModel (G4VEmAdjointModel *adjModel)

void	RegisterAdjointBremModel (G4VEmAdjointModel *adjModel)

void	ProcessDescription (std::ostream &) const override

void	DumpInfo () const override

	G4AdjointForcedInteractionForGamma (G4AdjointForcedInteractionForGamma &)=delete

G4AdjointForcedInteractionForGamma &	operator= (const G4AdjointForcedInteractionForGamma &right)=delete

Public Member Functions inherited from G4VContinuousDiscreteProcess
	G4VContinuousDiscreteProcess (const G4String &, G4ProcessType aType=fNotDefined)

	G4VContinuousDiscreteProcess (G4VContinuousDiscreteProcess &)

virtual	~G4VContinuousDiscreteProcess ()

G4VContinuousDiscreteProcess &	operator= (const G4VContinuousDiscreteProcess &)=delete

virtual G4double	AlongStepGetPhysicalInteractionLength (const G4Track &, G4double previousStepSize, G4double currentMinimumStep, G4double &currentSafety, G4GPILSelection *selection)

virtual G4double	AtRestGetPhysicalInteractionLength (const G4Track &, G4ForceCondition *)

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

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 G4bool	IsApplicable (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 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

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 Member Functions
G4double	GetMeanFreePath (const G4Track &track, G4double previousStepSize, G4ForceCondition *condition) override

G4double	GetContinuousStepLimit (const G4Track &aTrack, G4double previousStepSize, G4double currentMinimumStep, G4double &currentSafety) override

Protected Member Functions inherited from G4VContinuousDiscreteProcess
void	SetGPILSelection (G4GPILSelection selection)

G4GPILSelection	GetGPILSelection () const

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

void	ClearNumberOfInteractionLengthLeft ()

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

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 47 of file G4AdjointForcedInteractionForGamma.hh.

Constructor & Destructor Documentation

◆ G4AdjointForcedInteractionForGamma() [1/2]

G4AdjointForcedInteractionForGamma::G4AdjointForcedInteractionForGamma ( const G4String & process_name )

explicit

Definition at line 36 of file G4AdjointForcedInteractionForGamma.cc.

  : G4VContinuousDiscreteProcess(process_name)
  , fAdjointComptonModel(nullptr)
  , fAdjointBremModel(nullptr)
{
  fCSManager      = G4AdjointCSManager::GetAdjointCSManager();
  fParticleChange = new G4ParticleChange();
}

Referenced by G4AdjointForcedInteractionForGamma(), and operator=().

◆ ~G4AdjointForcedInteractionForGamma()

G4AdjointForcedInteractionForGamma::~G4AdjointForcedInteractionForGamma ( )

override

Definition at line 47 of file G4AdjointForcedInteractionForGamma.cc.

{
  if(fParticleChange)
    delete fParticleChange;
}

◆ G4AdjointForcedInteractionForGamma() [2/2]

G4AdjointForcedInteractionForGamma::G4AdjointForcedInteractionForGamma ( G4AdjointForcedInteractionForGamma & )

delete

Member Function Documentation

◆ AlongStepDoIt()

G4VParticleChange * G4AdjointForcedInteractionForGamma::AlongStepDoIt	(	const G4Track &	track,
		const G4Step &	step )

overridevirtual

Reimplemented from G4VContinuousDiscreteProcess.

Definition at line 160 of file G4AdjointForcedInteractionForGamma.cc.

{
  fParticleChange->Initialize(track);
  // Compute nb of interactions length over step length
  G4ThreeVector position = track.GetPosition();
  G4double stepLength    = track.GetStep()->GetStepLength();
  G4double ekin          = track.GetKineticEnergy();
  fLastAdjCS = fCSManager->GetTotalAdjointCS(track.GetDefinition(), ekin,
                                             track.GetMaterialCutsCouple());
  G4double nb_fwd_interaction_length_over_step =
    stepLength * fCSManager->GetTotalForwardCS(G4AdjointGamma::AdjointGamma(),
                                               ekin,
                                               track.GetMaterialCutsCouple());
 
  G4double nb_adj_interaction_length_over_step = stepLength * fLastAdjCS;
  G4double fwd_survival_probability =
    std::exp(-nb_fwd_interaction_length_over_step);
  G4double mc_induced_survival_probability = 1.;
 
  if(fFreeFlightGamma)
  {  // for free_flight survival probability stays 1
    // Accumulate the number of interaction lengths during free flight of gamma
    fTotNbAdjIntLength += nb_adj_interaction_length_over_step;
    fAccTrackLength += stepLength;
  }
  else
  {
    G4double previous_acc_nb_adj_interaction_length = fNbAdjIntLength;
    fNbAdjIntLength += fCSBias*nb_adj_interaction_length_over_step;
    theNumberOfInteractionLengthLeft -= fCSBias*nb_adj_interaction_length_over_step;
 
    // protection against rare race condition
    if(std::abs(fTotNbAdjIntLength - previous_acc_nb_adj_interaction_length) <=
       1.e-15)
    {
      mc_induced_survival_probability = 1.e50;
    }
    else
    {
      mc_induced_survival_probability =
        std::exp(-fNbAdjIntLength) - std::exp(-fTotNbAdjIntLength);
      mc_induced_survival_probability /=
        (std::exp(-previous_acc_nb_adj_interaction_length) -
         std::exp(-fTotNbAdjIntLength));
    }
  }
  G4double weight_correction =
    fwd_survival_probability / mc_induced_survival_probability;
 
  // Caution!!!
  // It is important to select the weight of the post_step_point as the
  // current weight and not the weight of the track, as the weight of the track
  // is changed after having applied all the along_step_do_it.
  G4double new_weight =
    weight_correction * track.GetStep()->GetPostStepPoint()->GetWeight();
 
  fParticleChange->SetParentWeightByProcess(false);
  fParticleChange->SetSecondaryWeightByProcess(false);
  fParticleChange->ProposeParentWeight(new_weight);
 
  return fParticleChange;
}

◆ BuildPhysicsTable()

void G4AdjointForcedInteractionForGamma::BuildPhysicsTable ( const G4ParticleDefinition & )

overridevirtual

Reimplemented from G4VProcess.

Definition at line 61 of file G4AdjointForcedInteractionForGamma.cc.

{
  fCSManager->BuildCrossSectionMatrices();  // it will be done just once
  fCSManager->BuildTotalSigmaTables();
}

◆ DumpInfo()

void G4AdjointForcedInteractionForGamma::DumpInfo ( ) const

inlineoverridevirtual

Reimplemented from G4VProcess.

Definition at line 76 of file G4AdjointForcedInteractionForGamma.hh.

76{ ProcessDescription(G4cout); };

G4cout

G4GLOB_DLL std::ostream G4cout

G4AdjointForcedInteractionForGamma::ProcessDescription

void ProcessDescription(std::ostream &) const override

Definition G4AdjointForcedInteractionForGamma.cc:54

◆ GetContinuousStepLimit()

G4double G4AdjointForcedInteractionForGamma::GetContinuousStepLimit	(	const G4Track &	aTrack,
		G4double	previousStepSize,
		G4double	currentMinimumStep,
		G4double &	currentSafety )

overrideprotectedvirtual

Implements G4VContinuousDiscreteProcess.

Definition at line 284 of file G4AdjointForcedInteractionForGamma.cc.

{
  return DBL_MAX;
}

◆ GetMeanFreePath()

G4double G4AdjointForcedInteractionForGamma::GetMeanFreePath	(	const G4Track &	track,
		G4double	previousStepSize,
		G4ForceCondition *	condition )

overrideprotectedvirtual

Implements G4VContinuousDiscreteProcess.

Definition at line 292 of file G4AdjointForcedInteractionForGamma.cc.

{
  return 0.;
}

◆ operator=()

G4AdjointForcedInteractionForGamma & G4AdjointForcedInteractionForGamma::operator= ( const G4AdjointForcedInteractionForGamma & right )

delete

◆ PostStepDoIt()

G4VParticleChange * G4AdjointForcedInteractionForGamma::PostStepDoIt	(	const G4Track &	track,
		const G4Step &	)

overridevirtual

Reimplemented from G4VContinuousDiscreteProcess.

Definition at line 86 of file G4AdjointForcedInteractionForGamma.cc.

{
  fParticleChange->Initialize(track);
  // For the free flight gamma no interaction occurs but a gamma with same
  // properties is produced for further forced interaction. It is done at the
  // very beginning of the track so that the weight can be the same
  if(fCopyGammaForForced)
  {
    G4ThreeVector theGammaMomentum = track.GetMomentum();
    fParticleChange->AddSecondary(
      new G4DynamicParticle(G4AdjointGamma::AdjointGamma(), theGammaMomentum));
    fParticleChange->SetParentWeightByProcess(false);
    fParticleChange->SetSecondaryWeightByProcess(false);
  }
  else
  {  // Occurrence of forced interaction
    // Selection of the model to be called
    G4VEmAdjointModel* theSelectedModel = nullptr;
    G4bool is_scat_proj_to_proj_case    = false;
    G4double factor=1.;
    if(!fAdjointComptonModel && !fAdjointBremModel)
      return fParticleChange;
    if(!fAdjointComptonModel)
    {
      theSelectedModel          = fAdjointBremModel;
      is_scat_proj_to_proj_case = false;
      // This is needed because the results of it will be used in the post step
      // do it weight correction inside the model
      fAdjointBremModel->AdjointCrossSection(track.GetMaterialCutsCouple(),
                                             track.GetKineticEnergy(), false);
    }
    else if(!fAdjointBremModel)
    {
      theSelectedModel          = fAdjointComptonModel;
      is_scat_proj_to_proj_case = true;
    }
    else
    {  // Choose the model according to a 50-50 % probability
      G4double bremAdjCS = fAdjointBremModel->AdjointCrossSection(
        track.GetMaterialCutsCouple(), track.GetKineticEnergy(), false);
      if(G4UniformRand()  < 0.5)
      {
        theSelectedModel          = fAdjointBremModel;
        is_scat_proj_to_proj_case = false;
        factor=bremAdjCS/fLastAdjCS/0.5;
      }
      else
      {
        theSelectedModel          = fAdjointComptonModel;
        is_scat_proj_to_proj_case = true;
        factor=(fLastAdjCS-bremAdjCS)/fLastAdjCS/0.5;
      }
    }
 
    // Compute the weight correction factor
    G4double invEffectiveAdjointCS =
      (1. - std::exp(fNbAdjIntLength - fTotNbAdjIntLength)) / fLastAdjCS/fCSBias;
 
    // Call the  selected model without correction of the weight in the model
    theSelectedModel->SetCorrectWeightForPostStepInModel(false);
    theSelectedModel
      ->SetAdditionalWeightCorrectionFactorForPostStepOutsideModel(
        factor*fLastAdjCS * invEffectiveAdjointCS);
    theSelectedModel->SampleSecondaries(track, is_scat_proj_to_proj_case,
                                        fParticleChange);
    theSelectedModel->SetCorrectWeightForPostStepInModel(true);
 
    fContinueGammaAsNewFreeFlight = true;
  }
  return fParticleChange;
}

◆ PostStepGetPhysicalInteractionLength()

G4double G4AdjointForcedInteractionForGamma::PostStepGetPhysicalInteractionLength	(	const G4Track &	track,
		G4double	previousStepSize,
		G4ForceCondition *	condition )

overridevirtual

Reimplemented from G4VContinuousDiscreteProcess.

Definition at line 226 of file G4AdjointForcedInteractionForGamma.cc.

{
  G4int step_id                      = track.GetCurrentStepNumber();
  *condition                         = NotForced;
  fCopyGammaForForced                = false;
  G4int track_id                     = track.GetTrackID();
  fFreeFlightGamma =
    (track_id != fLastFreeFlightTrackId + 1 || fContinueGammaAsNewFreeFlight);
  if(fFreeFlightGamma)
  {
    if(step_id == 1 || fContinueGammaAsNewFreeFlight)
    {
      *condition = Forced;
      // A gamma with same conditions will be generate at next post_step do it
      // for the forced interaction
      fCopyGammaForForced           = true;
      fLastFreeFlightTrackId         = track_id;
      fAccTrackLength               = 0.;
      fTotNbAdjIntLength            = 0.;
      fContinueGammaAsNewFreeFlight = false;
      return 1.e-90;
    }
    else
    {
      return DBL_MAX;
    }
  }
  else
  {  // compute the interaction length for forced interaction
    if(step_id == 1)
    {
      fCSBias=0.000001/fTotNbAdjIntLength;
      fTotNbAdjIntLength*=fCSBias;
      G4double min_val = std::exp(-fTotNbAdjIntLength);
      theNumberOfInteractionLengthLeft =
        -std::log(min_val + G4UniformRand() * (1. - min_val));
      theInitialNumberOfInteractionLength = theNumberOfInteractionLengthLeft;
      fNbAdjIntLength                     = 0.;
    }
    G4VPhysicalVolume* thePostPhysVolume =
      track.GetStep()->GetPreStepPoint()->GetPhysicalVolume();
    G4double ekin   = track.GetKineticEnergy();
    G4double postCS = 0.;
    if(thePostPhysVolume)
    {
      postCS = fCSManager->GetTotalAdjointCS(
        G4AdjointGamma::AdjointGamma(), ekin,
        thePostPhysVolume->GetLogicalVolume()->GetMaterialCutsCouple());
    }
    if(postCS > 0.)
      return theNumberOfInteractionLengthLeft / postCS /fCSBias;
    else
      return DBL_MAX;
  }
}

◆ ProcessDescription()

void G4AdjointForcedInteractionForGamma::ProcessDescription ( std::ostream & out ) const

overridevirtual

Reimplemented from G4VProcess.

Definition at line 54 of file G4AdjointForcedInteractionForGamma.cc.

{
  out << "Forced interaction for gamma.\n";
}

Referenced by DumpInfo().

◆ RegisterAdjointBremModel()

void G4AdjointForcedInteractionForGamma::RegisterAdjointBremModel ( G4VEmAdjointModel * adjModel )

inline

Definition at line 70 of file G4AdjointForcedInteractionForGamma.hh.

  {
    fAdjointBremModel = adjModel;
  }

◆ RegisterAdjointComptonModel()

void G4AdjointForcedInteractionForGamma::RegisterAdjointComptonModel ( G4VEmAdjointModel * adjModel )

inline

Definition at line 65 of file G4AdjointForcedInteractionForGamma.hh.

  {
    fAdjointComptonModel = adjModel;
  }

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

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ G4AdjointForcedInteractionForGamma() [1/2]

◆ ~G4AdjointForcedInteractionForGamma()

◆ G4AdjointForcedInteractionForGamma() [2/2]

Member Function Documentation

◆ AlongStepDoIt()

◆ BuildPhysicsTable()

◆ DumpInfo()

◆ GetContinuousStepLimit()

◆ GetMeanFreePath()

◆ operator=()

◆ PostStepDoIt()

◆ PostStepGetPhysicalInteractionLength()

◆ ProcessDescription()

◆ RegisterAdjointBremModel()

◆ RegisterAdjointComptonModel()