G4Channeling Class Reference

#include <G4Channeling.hh>

Inheritance diagram for G4Channeling:

Public Member Functions
	G4Channeling ()
virtual	~G4Channeling ()
virtual G4VParticleChange *	PostStepDoIt (const G4Track &, const G4Step &)
virtual G4bool	IsApplicable (const G4ParticleDefinition &aPD)
virtual void	BuildPhysicsTable (const G4ParticleDefinition &)
G4double	GetCriticalAngle (const G4Track &aTrack)
G4double	GetOscillationPeriod (const G4Track &aTrack)
void	PosToLattice (G4StepPoint *step, G4ThreeVector &)
G4double	GetTransverseVariationMax ()
void	SetTransverseVariationMax (G4double aDouble)
G4double	GetTimeStepMin ()
void	SetTimeStepMin (G4double aDouble)
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 &)

Protected Member Functions
virtual G4double	GetMeanFreePath (const G4Track &, G4double, G4ForceCondition *)
Protected Member Functions inherited from G4VDiscreteProcess
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 40 of file G4Channeling.hh.

Constructor & Destructor Documentation

G4Channeling()

G4Channeling::G4Channeling

(

)

Definition at line 37 of file G4Channeling.cc.

                          :
G4VDiscreteProcess("channeling"),
fChannelingID(G4PhysicsModelCatalog::GetModelID("model_channeling")),
fTimeStepMin(0.),
fTimeStepMax(0.),
fTransverseVariationMax(2.E-2 * CLHEP::angstrom),
k010(G4ThreeVector(0.,1.,0.)),
fSpin(G4ThreeVector(0.,0.,0.))
{}

~G4Channeling()

G4Channeling::~G4Channeling ( )

virtual

Definition at line 49 of file G4Channeling.cc.

{;}

Member Function Documentation

BuildPhysicsTable()

virtual void G4Channeling::BuildPhysicsTable ( const G4ParticleDefinition & )

inlinevirtual

Reimplemented from G4VProcess.

Definition at line 51 of file G4Channeling.hh.

{;};

GetCriticalAngle()

G4double G4Channeling::GetCriticalAngle ( const G4Track & aTrack )

inline

Definition at line 84 of file G4Channeling.hh.

                                                    {
        return std::sqrt(2.0*GetMatData(aTrack)->GetPot()->GetMaxMin()
                         /GetPre(aTrack)->GetTotalEnergy());}

Referenced by GetOscillationPeriod().

GetMeanFreePath()

G4double G4Channeling::GetMeanFreePath ( const G4Track & aTrack, G4double , G4ForceCondition * condition )

protectedvirtual

Implements G4VDiscreteProcess.

Definition at line 296 of file G4Channeling.cc.

                                            {
    
    //----------------------------------------
    // the condition is forced to check if
    // the volume has a lattice at each step.
    // if it hasn't, return DBL_MAX
    //----------------------------------------
    
    *condition = Forced;
    
    G4LogicalVolume* aLV = aTrack.GetVolume()->GetLogicalVolume();
    G4LogicalVolume* aNLV = aTrack.GetNextVolume()->GetLogicalVolume();
    
    if(G4LogicalCrystalVolume::IsLattice(aLV) == true &&
       G4LogicalCrystalVolume::IsLattice(aNLV) == true){
        G4double osc_per = GetOscillationPeriod(aTrack);
        fTimeStepMin = osc_per * 2.E-4;
        return osc_per * 0.01;
    }
    else{
        GetTrackData(aTrack)->Reset();
        return DBL_MAX;
    }
}

GetOscillationPeriod()

G4double G4Channeling::GetOscillationPeriod ( const G4Track & aTrack )

inline

Definition at line 87 of file G4Channeling.hh.

                                                        {
        return (CLHEP::pi * GetMatData(aTrack)->GetPot()->GetIntSp(0)
                / GetCriticalAngle(aTrack));
    }

Referenced by GetMeanFreePath().

GetTimeStepMin()

G4double G4Channeling::GetTimeStepMin ( )

inline

Definition at line 117 of file G4Channeling.hh.

{return fTimeStepMin;};

GetTransverseVariationMax()

G4double G4Channeling::GetTransverseVariationMax ( )

inline

Definition at line 114 of file G4Channeling.hh.

{return fTransverseVariationMax;};

IsApplicable()

virtual G4bool G4Channeling::IsApplicable ( const G4ParticleDefinition & aPD )

inlinevirtual

Reimplemented from G4VProcess.

Definition at line 48 of file G4Channeling.hh.

                                                                {
        return(aPD.GetPDGCharge() != 0.);
    };

PosToLattice()

void G4Channeling::PosToLattice	(	G4StepPoint *	step,
		G4ThreeVector &	pos )

Definition at line 75 of file G4Channeling.cc.

                                                                   {
    G4TouchableHistory* theTouchable = (G4TouchableHistory*)(step->GetTouchable());
 
    pos -= theTouchable->GetTranslation();
    pos = ((*theTouchable->GetRotation()).inverse())(pos);
}

Referenced by PostStepDoIt().

PostStepDoIt()

G4VParticleChange * G4Channeling::PostStepDoIt ( const G4Track & aTrack, const G4Step &  )

virtual

Reimplemented from G4VDiscreteProcess.

Definition at line 326 of file G4Channeling.cc.

                           {
    
    //----------------------------------------
    // check if the volume has a lattice
    // and if the particle is in channeling.
    // If it is so, the particle is forced
    // to follow the channeling plane
    // direction. If the particle has
    // dechanneled or exited the crystal,
    // the outgoing angle is evaluated
    //----------------------------------------
    
    aParticleChange.Initialize(aTrack);
    G4LogicalVolume* aLV = aTrack.GetVolume()->GetLogicalVolume();
    G4LogicalVolume* aNLV = aTrack.GetNextVolume()->GetLogicalVolume();
    
    
    if(G4LogicalCrystalVolume::IsLattice(aLV) == true &&
       G4LogicalCrystalVolume::IsLattice(aNLV) == true){
 
        G4bool bModifiedTraj = UpdateParameters(aTrack);
 
        if(bModifiedTraj==true){
            //----------------------------------------
            // Get the momentum in the reference frame
            // solidal to the bent planes and rotate
            // to the reference frame
            //----------------------------------------
            G4LogicalCrystalVolume* aLCV = (G4LogicalCrystalVolume*)(aTrack.GetVolume()->GetLogicalVolume());
            G4ThreeVector momCh = GetTrackData(aTrack)->GetMomCh();
 
            G4StepPoint* postStepPoint = aTrack.GetStep()->GetPostStepPoint();
            G4TouchableHistory* theTouchable = (G4TouchableHistory*)(postStepPoint->GetTouchable());
 
            if(GetMatData(aTrack)->IsBent()){
                G4ThreeVector posPost = postStepPoint->GetPosition();
                PosToLattice(postStepPoint,posPost);
                G4ThreeVector axis010 = (*theTouchable->GetRotation())(k010);
                momCh.rotate(axis010,posPost.z()/GetMatData(aTrack)->GetBR(posPost).x());
            }
            
            //----------------------------------------
            // Get the momentum in the crystal reference
            // frame and rotate to the solid reference frame
            //----------------------------------------
 
            aLCV->RotateToSolid(momCh);
            
            //----------------------------------------
            // Get the momentum in the solid reference
            // frame and rotate to the world reference frame
            //----------------------------------------
            G4ThreeVector mom = ((*theTouchable->GetRotation()).inverse())(momCh);
 
            aParticleChange.ProposeMomentumDirection(mom.unit());
            aParticleChange.ProposePolarization(fSpin);
        }
    }
    else{
        // if the volume has no lattice it resets the density factors
        GetTrackData(aTrack)->Reset();
    }
    
    return &aParticleChange;
}

SetTimeStepMin()

void G4Channeling::SetTimeStepMin ( G4double aDouble )

inline

Definition at line 118 of file G4Channeling.hh.

{fTimeStepMin = aDouble;};

SetTransverseVariationMax()

void G4Channeling::SetTransverseVariationMax ( G4double aDouble )

inline

Definition at line 115 of file G4Channeling.hh.

{fTransverseVariationMax = aDouble;};

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

• G4Channeling.hh
• G4Channeling.cc