#include <eic-smear/blob/master/include/eicsmear/smear/RadialTracker.h>

Inheritance diagram for Smear::RadialTracker:

Collaboration diagram for Smear::RadialTracker:

Public Member Functions
	RadialTracker ()

	RadialTracker (double innerRadius, double outerRadius, double zMin, double zMax, double magneticField, double numberOfRadiationLengths, double sigmaRPhi, double numberOfPoints)

virtual	~RadialTracker ()

virtual RadialTracker *	Clone (const char *="") const

virtual void	Print (Option_t *="") const

double	L (const erhic::VirtualParticle &) const

double	LPrime (const erhic::VirtualParticle &) const

virtual int	NPoints (const erhic::VirtualParticle &) const

virtual bool	Accepts (const erhic::VirtualParticle &) const

virtual double	GetThetaMin () const

virtual double	GetThetaMax () const

Public Member Functions inherited from Smear::Tracker
	Tracker (double magneticField=2., double nRadiationLengths=0.01, double resolution=0.001)

virtual	~Tracker ()

virtual double	Resolution (const erhic::VirtualParticle &) const

void	Smear (const erhic::VirtualParticle &, ParticleMCS &)

void	SetVertexConstraint (bool constrain)

Public Member Functions inherited from Smear::Smearer
virtual	~Smearer ()

Protected Member Functions
TVector3	ComputeIntersectionWithRadius (const erhic::VirtualParticle &, double radius) const

TVector3	ComputeIntersectionWithPlane (const erhic::VirtualParticle &, double z) const

TVector3	ComputePath (const erhic::VirtualParticle &) const

Protected Member Functions inherited from Smear::Tracker
virtual double	MultipleScatteringContribution (const erhic::VirtualParticle &) const

virtual double	IntrinsicContribution (const erhic::VirtualParticle &) const

Protected Attributes
double	mNFitPoints
	Number of fit points.

double	mInnerRadius
	Inner radius (m)

double	mOuterRadius
	Outer radius (m)

double	mZMin
	Lower (most negative) z face.

double	mZMax
	Upper (most positive) z face.

Protected Attributes inherited from Smear::Tracker
Int_t	mFactor

double	mMagField
	Magnetic field strength in Tesla.

double	mNRadLengths
	Number of radiation lengths (dimensionless)

double	mSigmaRPhi
	Point resolution.

Distributor	Distribution
	Random distribution.

Additional Inherited Members
Public Attributes inherited from Smear::Smearer
Acceptance	Accept

Detailed Description

A cylindrical tracking detector. Implements both intrinsic and multiple-scattering resolution.

Definition at line 32 of file RadialTracker.h.

View newest version in sPHENIX GitHub at line 32 of file RadialTracker.h

Constructor & Destructor Documentation

Smear::RadialTracker::RadialTracker ( )

Default constructor. B = 2, NRL = 0.03, sigma(r-phi) = 0.001, N = 25, inner radius = 0.25 m, outer radius = 1 m, length = 6 m.

Definition at line 32 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 32 of file RadialTracker.cxx

Referenced by Clone().

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Smear::RadialTracker::RadialTracker	(	double	innerRadius,
		double	outerRadius,
		double	zMin,
		double	zMax,
		double	magneticField,
		double	numberOfRadiationLengths,
		double	sigmaRPhi,
		double	numberOfPoints
	)

Constructor for a tracker with arbitrary positioning along z.

Definition at line 41 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 41 of file RadialTracker.cxx

Smear::RadialTracker::~RadialTracker ( )

virtual

Destructor.

Definition at line 54 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 54 of file RadialTracker.cxx

Member Function Documentation

bool Smear::RadialTracker::Accepts ( const erhic::VirtualParticle & p ) const

virtual

Returns true if the particle falls within the angular acceptance defined via the input parameters. This is defined as the particle's transverse path length being greater than half of (outer radius - inner radius) / number of fit points i.e. the particle has to pass through enough of the detector to cause at least one measureable point.

Implements Smear::Tracker.

Definition at line 152 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 152 of file RadialTracker.cxx

References NPoints().

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RadialTracker * Smear::RadialTracker::Clone ( const char * = "" ) const

inlinevirtual

Returns a new copy of this Tracker. The argument is not used.

Implements Smear::Smearer.

Definition at line 138 of file RadialTracker.h.

View newest version in sPHENIX GitHub at line 138 of file RadialTracker.h

References RadialTracker().

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TVector3 Smear::RadialTracker::ComputeIntersectionWithPlane	(	const erhic::VirtualParticle &	p,
		double	z
	)		const

protected

Compute the intersection point of the particle with an x-y plane at z. Returns the 3-vector of the intersetion point if the radius of the intersection is within (inner radius, outer radius), or (0, 0, NaN) if not.

Definition at line 82 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 82 of file RadialTracker.cxx

References erhic::VirtualParticle::GetTheta(), erhic::VirtualParticle::GetVertex(), mInnerRadius, and mOuterRadius.

Referenced by ComputePath().

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TVector3 Smear::RadialTracker::ComputeIntersectionWithRadius	(	const erhic::VirtualParticle &	p,
		double	radius
	)		const

protected

Compute the intersection point of the particle with a radial surface. Returns the 3-vector of the intersection point if the z of the intersection is within (zmin, zmax) of this detector, or (0, 0, NaN) if not.

Definition at line 69 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 69 of file RadialTracker.cxx

References erhic::VirtualParticle::GetTheta(), erhic::VirtualParticle::GetVertex(), mZMax, mZMin, and z.

Referenced by ComputePath().

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TVector3 Smear::RadialTracker::ComputePath ( const erhic::VirtualParticle & p ) const

protected

Computes the path vector, defined as (v2 - v1), where v1 and v2 are the position vectors of the particle's intersections with the cylinder's surface. Returns (0, 0, 0) for particles that don't intersect, or if something goes wrong.

Definition at line 95 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 95 of file RadialTracker.cxx

References ComputeIntersectionWithPlane(), ComputeIntersectionWithRadius(), mInnerRadius, mOuterRadius, mZMax, and mZMin.

Referenced by L(), LPrime(), and NPoints().

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double Smear::RadialTracker::GetThetaMax ( ) const

virtual

Returns the maximum theta of particles accepted by the tracker (radians).

Implements Smear::Tracker.

Definition at line 170 of file RadialTracker.cxx.

View newest version in sPHENIX GitHub at line 170 of file RadialTracker.cxx