fastsim::BarrelSimplifiedGeometry Class Reference

Implementation of a barrel detector layer (cylindrical). More...

#include <BarrelSimplifiedGeometry.h>

Inheritance diagram for fastsim::BarrelSimplifiedGeometry:

Public Member Functions
	BarrelSimplifiedGeometry (double radius)
	Constructor. More...
	BarrelSimplifiedGeometry (BarrelSimplifiedGeometry &&)=default
	Move constructor. More...
const double	getMagneticFieldZ (const math::XYZTLorentzVector &position) const override
	Return magnetic field (field only has Z component!) on the barrel layer. More...
const double	getRadius () const
	Return radius of the barrel layer. More...
const double	getThickness (const math::XYZTLorentzVector &position) const override
	Return thickness of the barrel layer at a given position. More...
const double	getThickness (const math::XYZTLorentzVector &position, const math::XYZTLorentzVector &momentum) const override
	Return thickness of the barrel layer at a given position, also considering the incident angle. More...
bool	isForward () const override
	Returns false since class for barrel layer. More...
	~BarrelSimplifiedGeometry ()
	Default destructor. More...
Public Member Functions inherited from fastsim::SimplifiedGeometry
CaloType	getCaloType () const
	Hack to interface "old" Calorimetry with "new" Tracker. More...
const DetLayer *	getDetLayer () const
	Return pointer to the assigned active layer (if any). More...
const double	getGeomProperty () const
	Return geometric attribute of the layer. More...
const std::vector< InteractionModel * > &	getInteractionModels () const
	Return the vector of all interaction models that are assigned with a layer. More...
const double	getNuclearInteractionThicknessFactor () const
	Some layers have a different thickness for nuclear interactions. More...
int	index () const
	Return index of this layer (layers are numbered according to their position in the detector). More...
void	setCaloType (CaloType type)
	Hack to interface "old" Calorimetry with "new" Tracker. More...
void	setIndex (int index)
	Set index of this layer (layers are numbered according to their position in the detector). More...
	SimplifiedGeometry (double geomProperty)
	Default constructor. More...
	~SimplifiedGeometry ()
	Default destructor. More...

Additional Inherited Members
Public Types inherited from fastsim::SimplifiedGeometry
enum	CaloType {   NONE, TRACKERBOUNDARY, PRESHOWER1, PRESHOWER2,   ECAL, HCAL, VFCAL }
	Hack to interface "old" Calorimetry with "new" Tracker. More...
Protected Attributes inherited from fastsim::SimplifiedGeometry
CaloType	caloType_
	Hack to interface "old" Calorimetry with "new" Tracker. More...
const DetLayer *	detLayer_
	Return pointer to the assigned active layer (if any). More...
double	geomProperty_
	Geometric property of the layer: radius (barrel layer) / position z (forward layer) More...
int	index_
	Return index of this layer (layers are numbered according to their position in the detector). The (usual) order is increasing 'geomProperty'. More...
std::vector< InteractionModel * >	interactionModels_
	Vector of all interaction models that are assigned with a layer. More...
std::unique_ptr< TH1F >	magneticFieldHist_
	Histogram that stores the size of the magnetic field along the layer. More...
double	nuclearInteractionThicknessFactor_
	Some layers have a different thickness for nuclear interactions. More...
std::unique_ptr< TH1F >	thicknessHist_
	Histogram that stores the tickness (radLengths) along the layer. More...

Detailed Description

Implementation of a barrel detector layer (cylindrical).

A cylindrical layer with a given radius and a thickness (in radiation length). The layer is regarded infinitely long in Z-direction, however the thickness can vary (as a function of Z) and also be 0.

Definition at line 24 of file BarrelSimplifiedGeometry.h.

Constructor & Destructor Documentation

fastsim::BarrelSimplifiedGeometry::BarrelSimplifiedGeometry ( double  radius )

inline

Constructor.

Create a barrel layer with a given radius.

Parameters

radius

The radius of the layer (in cm).

Definition at line 32 of file BarrelSimplifiedGeometry.h.

                                                :
            SimplifiedGeometry(radius) {}

fastsim::BarrelSimplifiedGeometry::BarrelSimplifiedGeometry ( BarrelSimplifiedGeometry &&  )

default

Move constructor.

fastsim::BarrelSimplifiedGeometry::~BarrelSimplifiedGeometry ( )

inline

Default destructor.

Definition at line 39 of file BarrelSimplifiedGeometry.h.

{};

Member Function Documentation

const double fastsim::BarrelSimplifiedGeometry::getMagneticFieldZ ( const math::XYZTLorentzVector &  position ) const

inlineoverridevirtual

Return magnetic field (field only has Z component!) on the barrel layer.

Returns the magnetic field along the barrel layer at a specified position (radial symmetric).

Parameters

position

A position which has to be on the barrel layer.

Returns

The magnetic field on the layer.

Implements fastsim::SimplifiedGeometry.

Definition at line 80 of file BarrelSimplifiedGeometry.h.

References fastsim::SimplifiedGeometry::magneticFieldHist_.

        {
            return magneticFieldHist_->GetBinContent(magneticFieldHist_->GetXaxis()->FindBin(fabs(position.z())));
        }

const double fastsim::BarrelSimplifiedGeometry::getRadius ( ) const

inline

Return radius of the barrel layer.

Returns

The radius of the layer (in cm).

Definition at line 45 of file BarrelSimplifiedGeometry.h.

References fastsim::SimplifiedGeometry::geomProperty_.

Referenced by fastsim::HelixTrajectory::crosses(), fastsim::HelixTrajectory::nextCrossingTimeC(), and fastsim::StraightTrajectory::nextCrossingTimeC().

{ return geomProperty_; }

const double fastsim::BarrelSimplifiedGeometry::getThickness ( const math::XYZTLorentzVector &  position ) const

inlineoverridevirtual

Return thickness of the barrel layer at a given position.

Returns the thickness of the barrel layer (in radiation length) at a specified position since the thickness can vary as a function of Z.

Parameters

position

A position which has to be on the barrel layer.

Returns

The thickness of the layer (in radiation length).

See also

getThickness(const math::XYZTLorentzVector & position, const math::XYZTLorentzVector & momentum)

Implements fastsim::SimplifiedGeometry.

Definition at line 54 of file BarrelSimplifiedGeometry.h.

References fastsim::SimplifiedGeometry::thicknessHist_.

Referenced by getThickness().

        {
            return thicknessHist_->GetBinContent(thicknessHist_->GetXaxis()->FindBin(fabs(position.Z())));
        }

const double fastsim::BarrelSimplifiedGeometry::getThickness ( const math::XYZTLorentzVector &  position, const math::XYZTLorentzVector &  momentum  ) const

inlineoverridevirtual

Return thickness of the barrel layer at a given position, also considering the incident angle.

Returns the thickness of the barrel layer (in radiation length) at a specified position and a given incident angle since the thickness can vary as a function of Z.

Parameters

position	A position which has to be on the barrel layer.
momentum	The momentum of the incident particle.

Returns

The thickness of the layer (in radiation length).

See also

getThickness(const math::XYZTLorentzVector & position)

Implements fastsim::SimplifiedGeometry.

Definition at line 67 of file BarrelSimplifiedGeometry.h.

References getThickness(), and mathSSE::sqrt().

        {
            // Do projection of norm(layer) on momentum vector
            // CosTheta = (momentum dot norm) / (length(momentum) / length(norm))
            return getThickness(position) / (fabs(momentum.X() * position.X() + momentum.Y() * position.Y()) / (momentum.P() * std::sqrt(position.X() * position.X() + position.Y() * position.Y())));
        }

bool fastsim::BarrelSimplifiedGeometry::isForward ( ) const

inlineoverridevirtual

Returns false since class for barrel layer.

Function to easily destinguish barrel from forward layers (which both inherit from SimplifiedGeometry).

Returns

false

Implements fastsim::SimplifiedGeometry.

Definition at line 90 of file BarrelSimplifiedGeometry.h.

        { 
            return false;
        }