#include <CSCStripTopology.h>

Inheritance diagram for CSCStripTopology:

Public Member Functions
virtual CSCStripTopology *	clone () const =0

	CSCStripTopology (int ns, float aw, float dh, float r, float aoff, float ymid)

std::pair< float, float >	equationOfStrip (float strip) const

virtual std::ostream &	put (std::ostream &) const =0

std::pair< float, float >	yLimitsOfStripPlane () const

	~CSCStripTopology () override

Public Member Functions inherited from OffsetRadialStripTopology
int	channel (const LocalPoint &lp) const override=0

virtual int	channel (int strip) const =0

LocalPoint	localPosition (const MeasurementPoint &) const override

LocalPoint	localPosition (float strip) const override

MeasurementPoint	measurementPosition (const LocalPoint &) const override

	OffsetRadialStripTopology (int numberOfStrips, float stripPhiPitch, float detectorHeight, float radialDistance, float stripOffset, float yCentre)

float	strip (const LocalPoint &) const override

float	stripAngle (float strip) const override

virtual float	stripOffset (void) const

	~OffsetRadialStripTopology () override

Public Member Functions inherited from CSCRadialStripTopology
float	angularWidth () const override

float	centreToIntersection () const override

	CSCRadialStripTopology (int ns, float aw, float dh, float r, float yAx=1.f, float yMid=0.)

float	detHeight () const override

LocalError	localError (const MeasurementPoint &, const MeasurementError &) const override

LocalError	localError (float strip, float stripErr2) const override

float	localPitch (const LocalPoint &) const override

float	localStripLength (const LocalPoint &) const override

MeasurementError	measurementError (const LocalPoint &, const LocalError &) const override

int	nearestStrip (const LocalPoint &) const override

int	nstrips () const override

float	originToIntersection () const override

float	phiOfOneEdge () const override

float	phiPitch (void) const override

float	stripLength () const override

float	xOfStrip (int strip, float y) const override

float	yAxisOrientation () const override

float	yCentreOfStripPlane () const override

float	yDistanceToIntersection (float y) const override

float	yExtentOfStripPlane () const override

	~CSCRadialStripTopology () override

Public Member Functions inherited from RadialStripTopology
virtual LocalError	localError (float strip, float stripErr2) const=0

virtual LocalError	localError (float strip, float stripErr2, const Topology::LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...

virtual LocalPoint	localPosition (float strip) const=0

virtual LocalPoint	localPosition (float strip, const Topology::LocalTrackPred &) const
	conversion taking also the predicted track state More...

float	pitch () const final

	~RadialStripTopology () override

Public Member Functions inherited from StripTopology
virtual float	coveredStrips (const LocalPoint &lp1, const LocalPoint &lp2) const

virtual LocalError	localError (const MeasurementPoint &, const MeasurementError &) const=0

virtual LocalError	localError (const MeasurementPoint &mp, const MeasurementError &me, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...

virtual LocalError	localError (float strip, float stripErr2, const Topology::LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...

virtual float	localPitch (const LocalPoint &lp, const Topology::LocalTrackAngles &) const
	conversion taking also the angle from the track state (LocalTrajectoryParameters) More...

virtual LocalPoint	localPosition (const MeasurementPoint &) const=0

virtual LocalPoint	localPosition (const MeasurementPoint &mp, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...

virtual LocalPoint	localPosition (float strip, const Topology::LocalTrackPred &) const
	conversion taking also the predicted track state More...

virtual float	localStripLength (const LocalPoint &lp, const Topology::LocalTrackAngles &) const
	conversion taking also the angle from the track state (LocalTrajectoryParameters) More...

virtual float	strip (const LocalPoint &lp, const Topology::LocalTrackAngles &) const
	conversion taking also the angle from the track state (LocalTrajectoryParameters) More...

	~StripTopology () override

Public Member Functions inherited from Topology
virtual int	channel (const LocalPoint &lp, const LocalTrackAngles &) const
	conversion taking also the angle from the track state More...

virtual LocalError	localError (const MeasurementPoint &mp, const MeasurementError &me, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...

virtual LocalPoint	localPosition (const MeasurementPoint &mp, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...

virtual MeasurementError	measurementError (const LocalPoint &lp, const LocalError &le, const LocalTrackAngles &) const
	conversion taking also the angle from the track state More...

virtual MeasurementPoint	measurementPosition (const LocalPoint &lp, const LocalTrackAngles &) const
	conversion taking also the angle from the track state More...

virtual	~Topology ()

Friends
std::ostream &	operator<< (std::ostream &s, const CSCStripTopology &r)

Additional Inherited Members
Public Types inherited from Topology
typedef Point2DBase< double, LocalTag >	Local2DPoint

typedef Vector2D::MathVector	MathVector2D

typedef Basic2DVector< double >	Vector2D

Detailed Description

ABC interface for all endcap muon CSC radial strip topologies.
In the Endcap Muon CSCs, the cathode strips are strictly fan-shaped, each subtending a constant azimuthal angle, and project to a point. In every station and ring except for ME13 the nominal (perfect) geometry has this point of intersection (approximately) on the beam line. That constraint is unused as far as possible in order to allow non-perfect geometry and misalignment scenarios.
Note that the base class RST is concrete but this class is again abstract (for both historical and operational reasons.)
Alternate strip layers in each CSC are relatively offset by half-a-strip width (except in ME11) so the CSCStripTopology must be an OffsetRadialStripTopology, rather than a simple RadialStripTopology in which the long symmetry axis of the plane of strips is aligned with the local y axis of the detector.

Author: Tim Cox

Definition at line 28 of file CSCStripTopology.h.

Constructor & Destructor Documentation

◆ CSCStripTopology()

CSCStripTopology::CSCStripTopology	(	int	ns,
		float	aw,
		float	dh,
		float	r,
		float	aoff,
		float	ymid
	)

Constructor

Parameters

ns	number of strips
aw	angular width of a strip
dh	detector height (extent of strip plane along long symmetry axis))
r	radial distance from symmetry centre of strip plane to the point at which the outer edges of the two extreme strips (projected) intersect.
aoff	offset of y symmetry axis from local y as fraction of angular strip width.
ymid	local y of symmetry centre of strip plane before it is offset.

Definition at line 4 of file CSCStripTopology.cc.

5 : OffsetRadialStripTopology(ns, aw, dh, r, aoff, ymid) {}

◆ ~CSCStripTopology()

CSCStripTopology::~CSCStripTopology ( )

override

Definition at line 7 of file CSCStripTopology.cc.

7 {}

Member Function Documentation

◆ clone()

virtual CSCStripTopology* CSCStripTopology::clone ( ) const

pure virtual

Implemented in CSCGangedStripTopology, and CSCUngangedStripTopology.

Referenced by CSCLayerGeometry::CSCLayerGeometry(), and CSCLayerGeometry::operator=().

◆ equationOfStrip()

std::pair< float, float > CSCStripTopology::equationOfStrip ( float strip ) const

Return slope and intercept of straight line representing (centre-line of) a strip in 2-dim local coordinates.

The return value is a pair p with p.first = m, p.second = c, where y=mx+c.

Definition at line 9 of file CSCStripTopology.cc.

                                                                          {
   const float fprec = 1.E-06;
  
   // slope of strip
   float strangle = M_PI_2 - stripAngle(strip);
   float ms = 0;
   if (fabs(strangle) > fprec)
     ms = tan(strangle);
  
   // intercept of strip
   float cs = -originToIntersection();
  
   LogTrace("CSCStripTopology|CSC") << "CSCStripTopology: strip=" << strip << ", strip angle = " << strangle
                                    << ", intercept on y axis=" << cs;
  
   return std::pair<float, float>(ms, cs);
 }

References fwrapper::cs, LogTrace, M_PI_2, CSCRadialStripTopology::originToIntersection(), OffsetRadialStripTopology::strip(), OffsetRadialStripTopology::stripAngle(), and funct::tan().

Referenced by CSCLayerGeometry::intersectionOfStripAndWire().

◆ put()

virtual std::ostream& CSCStripTopology::put ( std::ostream & ) const

pure virtual

Virtual output function which is used to implement op<<

Implemented in CSCGangedStripTopology, and CSCUngangedStripTopology.

Referenced by operator<<().

◆ yLimitsOfStripPlane()

std::pair< float, float > CSCStripTopology::yLimitsOfStripPlane ( ) const

Return local y limits of strip plane

Definition at line 27 of file CSCStripTopology.cc.

                                                                   {
   // use functions from base class
   float ylow = yCentreOfStripPlane() - yExtentOfStripPlane() / 2.;
   float yhigh = yCentreOfStripPlane() + yExtentOfStripPlane() / 2.;
  
   return std::pair<float, float>(ylow, yhigh);
 }

References CSCRadialStripTopology::yCentreOfStripPlane(), and CSCRadialStripTopology::yExtentOfStripPlane().

Referenced by CSCLayerGeometry::yLimitsOfStripPlane().

Friends And Related Function Documentation

◆ operator<<

std::ostream& operator<<	(	std::ostream &	s,
		const CSCStripTopology &	r
	)

friend

Definition at line 39 of file CSCStripTopology.cc.

                                                                    {
   st.put(os) << " isa " << static_cast<const OffsetRadialStripTopology&>(st);
   return os;
 }

Public Member Functions

Friends

Additional Inherited Members