TrapezoidalStripTopology Class Reference

#include <TrapezoidalStripTopology.h>

Inheritance diagram for TrapezoidalStripTopology:

Public Member Functions
int	channel (const LocalPoint &) const override
virtual LocalError	localError (const MeasurementPoint &, const MeasurementError &) const =0
LocalError	localError (const MeasurementPoint &, const MeasurementError &) const override
virtual LocalError	localError (const MeasurementPoint &mp, const MeasurementError &me, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...
LocalError	localError (float strip, float stripErr2) const override
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...
float	localPitch (const LocalPoint &) const override
virtual LocalPoint	localPosition (const MeasurementPoint &) const =0
LocalPoint	localPosition (const MeasurementPoint &) const override
virtual LocalPoint	localPosition (const MeasurementPoint &mp, const LocalTrackPred &) const
	conversion taking also the angle from the predicted track state More...
LocalPoint	localPosition (float strip) const override
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	localStripLength (const LocalPoint &aLP) const override
MeasurementError	measurementError (const LocalPoint &, const LocalError &) const override
MeasurementPoint	measurementPosition (const LocalPoint &) const override
int	nstrips () const override
float	pitch () const override
float	radius () const
float	strip (const LocalPoint &) const override
float	stripAngle (float strip) const override
float	stripLength () const override
	det heigth (strip length in the middle) More...
	TrapezoidalStripTopology (int nstrip, float pitch, float detheight, float r0)
	TrapezoidalStripTopology (int nstrip, float pitch, float detheight, float r0, int yAx)
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 ()

Protected Member Functions
virtual float	shiftOffset (float pitch_fraction)

Private Attributes
float	theDetHeight
float	theDistToBeam
int	theNumberOfStrips
float	theOffset
float	thePitch
int	theYAxOr

Additional Inherited Members
Public Types inherited from Topology
typedef Point2DBase< double, LocalTag >	Local2DPoint
typedef Vector2D::MathVector	MathVector2D
typedef Basic2DVector< double >	Vector2D

Detailed Description

Specialised strip topology for rectangular barrel detectors. The strips are parallel to the local Y axis, so X is the precisely measured coordinate. Specialization of StripTopology for detectors of symmetric trapezoidal shape. The local Y coordinate is parallel to the central strip, and prpendicular to the paralle sides of the trapezoid. The first and last strips are parallel to the corresponding sides of the trapezoid. The pitch is constant at constant y. This topology makes a non-linear transformation: the pitch is not constant along the strips.

Definition at line 21 of file TrapezoidalStripTopology.h.

Constructor & Destructor Documentation

TrapezoidalStripTopology() [1/2]

TrapezoidalStripTopology::TrapezoidalStripTopology	(	int	nstrip,
		float	pitch,
		float	detheight,
		float	r0
	)

constructed from: number of strips pitch in the middle det heigth (strip length in the middle) radius of circle passing through the middle of the det with center at the crossing of the two sides.

Definition at line 7 of file TrapezoidalStripTopology.cc.

    : theNumberOfStrips(ns), thePitch(p), theDistToBeam(r0), theDetHeight(l) {
  theOffset = -theNumberOfStrips / 2. * thePitch;
  theYAxOr = 1;
#ifdef VERBOSE
  cout << "Constructing TrapezoidalStripTopology with"
       << " nstrips = " << ns << " pitch = " << p << " length = " << l << " r0 =" << r0 << endl;
#endif
}

References gather_cfg::cout, cmsLHEtoEOSManager::l, AlCaHLTBitMon_ParallelJobs::p, theNumberOfStrips, theOffset, thePitch, and theYAxOr.

TrapezoidalStripTopology() [2/2]

TrapezoidalStripTopology::TrapezoidalStripTopology	(	int	nstrip,
		float	pitch,
		float	detheight,
		float	r0,
		int	yAx
	)

Definition at line 17 of file TrapezoidalStripTopology.cc.

    : theNumberOfStrips(ns), thePitch(p), theDistToBeam(r0), theDetHeight(l), theYAxOr(yAx) {
  theOffset = -theNumberOfStrips / 2. * thePitch;
#ifdef VERBOSE
  cout << "Constructing TrapezoidalStripTopology with"
       << " nstrips = " << ns << " pitch = " << p << " length = " << l << " r0 =" << r0 << " yAxOrientation =" << yAx
       << endl;
#endif
}

References gather_cfg::cout, cmsLHEtoEOSManager::l, AlCaHLTBitMon_ParallelJobs::p, theNumberOfStrips, theOffset, and thePitch.

Member Function Documentation

channel()

int TrapezoidalStripTopology::channel ( const LocalPoint &  lp ) const

overridevirtual

Implements Topology.

Definition at line 102 of file TrapezoidalStripTopology.cc.

                                                                {
  return std::min(int(strip(lp)), theNumberOfStrips - 1);
}

References min(), strip(), and theNumberOfStrips.

localError() [1/6]

virtual LocalError Topology::localError

localError() [2/6]

LocalError TrapezoidalStripTopology::localError ( const MeasurementPoint &  mp, const MeasurementError &  merr  ) const

overridevirtual

Implements Topology.

Definition at line 53 of file TrapezoidalStripTopology.cc.

                                                                                                              {
  float lt, lc2, ls2, lslc;
  float localL, localP;
  float sl2, sp2, spl;
  // angle from strip to local frame (see CMS TN / 95-170)
  lt = -(mp.x() * thePitch + theOffset) * theYAxOr / theDistToBeam;
  lc2 = 1. / (1. + lt * lt);
  lslc = lt * lc2;
  ls2 = 1.f - lc2;
  localL = theDetHeight / std::sqrt(lc2);
  localP = localPitch(localPosition(mp));
  sp2 = merr.uu() * localP * localP;
  sl2 = merr.vv() * localL * localL;
  spl = merr.uv() * localP * localL;
  return LocalError(lc2 * sp2 + ls2 * sl2 - 2 * lslc * spl,
                    lslc * (sp2 - sl2) + (lc2 - ls2) * spl,
                    ls2 * sp2 + lc2 * sl2 + 2 * lslc * spl);
}

References localPitch(), localPosition(), mathSSE::sqrt(), theDetHeight, theDistToBeam, theOffset, thePitch, theYAxOr, MeasurementError::uu(), MeasurementError::uv(), MeasurementError::vv(), and PV2DBase< T, PVType, FrameType >::x().

localError() [3/6]

virtual LocalError Topology::localError

inline

conversion taking also the angle from the predicted track state

Definition at line 94 of file Topology.h.

                                                                {
    return localError(mp, me);
  }

localError() [4/6]

LocalError TrapezoidalStripTopology::localError ( float  strip, float  stripErr2  ) const

overridevirtual

Implements StripTopology.

Definition at line 37 of file TrapezoidalStripTopology.cc.

                                                                                  {
  float lt, lc2, ls2, lslc;
  float localL2, localP2;
  float sl2, sp2;
  // angle from strip to local frame (see CMS TN / 95-170)
  lt = -(strip * thePitch + theOffset) * theYAxOr / theDistToBeam;
  lc2 = 1.f / (1. + lt * lt);
  lslc = lt * lc2;
  ls2 = 1.f - lc2;
  localL2 = theDetHeight * theDetHeight / lc2;
  localP2 = thePitch * thePitch * lc2;
  sl2 = localL2 / 12.;
  sp2 = stripErr2 * localP2;
  return LocalError(lc2 * sp2 + ls2 * sl2, lslc * (sp2 - sl2), ls2 * sp2 + lc2 * sl2);
}

References strip(), theDetHeight, theDistToBeam, theOffset, thePitch, and theYAxOr.

localError() [5/6]

virtual LocalError StripTopology::localError

localError() [6/6]

virtual LocalError StripTopology::localError

inline

conversion taking also the angle from the predicted track state

Definition at line 26 of file StripTopology.h.

                                                                                                     {
    return localError(strip, stripErr2);
  }

localPitch()

float TrapezoidalStripTopology::localPitch ( const LocalPoint &  lp ) const

overridevirtual

Implements StripTopology.

Definition at line 108 of file TrapezoidalStripTopology.cc.

                                                                     {
  float x = lp.x();
  float y = theYAxOr * lp.y() + theDistToBeam;
  return thePitch * y / (theDistToBeam * std::sqrt(1.f + x * x / (y * y)));
}

References f, mathSSE::sqrt(), theDistToBeam, thePitch, theYAxOr, x, PV3DBase< T, PVType, FrameType >::x(), y, and PV3DBase< T, PVType, FrameType >::y().

Referenced by localError(), and measurementError().

localPosition() [1/6]

virtual LocalPoint Topology::localPosition

localPosition() [2/6]

LocalPoint TrapezoidalStripTopology::localPosition ( const MeasurementPoint &  mp ) const

overridevirtual

Implements Topology.

Definition at line 31 of file TrapezoidalStripTopology.cc.

                                                                                   {
  float y = mp.y() * theDetHeight;
  float x = (mp.x() * thePitch + theOffset) * (theYAxOr * y + theDistToBeam) / theDistToBeam;
  return LocalPoint(x, y);
}

References theDetHeight, theDistToBeam, theOffset, thePitch, theYAxOr, x, PV2DBase< T, PVType, FrameType >::x(), y, and PV2DBase< T, PVType, FrameType >::y().

localPosition() [3/6]

virtual LocalPoint Topology::localPosition

inline

conversion taking also the angle from the predicted track state

Definition at line 89 of file Topology.h.

                                                                                               {
    return localPosition(mp);
  }

localPosition() [4/6]

LocalPoint TrapezoidalStripTopology::localPosition ( float  strip ) const

overridevirtual

Implements StripTopology.

Definition at line 27 of file TrapezoidalStripTopology.cc.

                                                                    {
  return LocalPoint(strip * thePitch + theOffset, 0.0);
}

References strip(), theOffset, and thePitch.

Referenced by localError(), RPCSimSimple::simulateNoise(), RPCSimParam::simulateNoise(), RPCSimAverage::simulateNoise(), RPCSimAverageNoise::simulateNoise(), RPCSimModelTiming::simulateNoise(), RPCSimAverageNoiseEffCls::simulateNoise(), RPCSimAverageNoiseEff::simulateNoise(), RPCSimAsymmetricCls::simulateNoise(), CSCSegtoRPC::thePoints(), and TracktoRPC::thePoints().

localPosition() [5/6]

virtual LocalPoint StripTopology::localPosition

localPosition() [6/6]

virtual LocalPoint StripTopology::localPosition

inline

conversion taking also the predicted track state

Definition at line 20 of file StripTopology.h.

                                                                                       {
    return localPosition(strip);
  }

localStripLength()

float TrapezoidalStripTopology::localStripLength ( const LocalPoint &  aLP ) const

overridevirtual

Implements StripTopology.

Definition at line 125 of file TrapezoidalStripTopology.cc.

                                                                           {
  float ltan = -lp.x() / (theYAxOr * lp.y() + theDistToBeam) * theYAxOr;
  float localL = theDetHeight * std::sqrt(1.f + ltan * ltan);
  //  float lcos2 = 1.f/(1.f+ltan*ltan);
  //  float localL = theDetHeight / std::sqrt(lcos2);
 
  return localL;
}

References f, mathSSE::sqrt(), theDetHeight, theDistToBeam, theYAxOr, PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::y().

measurementError()

MeasurementError TrapezoidalStripTopology::measurementError ( const LocalPoint &  lp, const LocalError &  lerr  ) const

overridevirtual

Implements Topology.

Definition at line 86 of file TrapezoidalStripTopology.cc.

                                                                                                              {
  float lt, lc2, ls2, lslc;
  float localL, localP;
  float sl2, sp2, spl;
  lt = -lp.x() / (theYAxOr * lp.y() + theDistToBeam) * theYAxOr;
  lc2 = 1. / (1. + lt * lt);
  lslc = lt * lc2;
  ls2 = 1. - lc2;
  localL = theDetHeight / std::sqrt(lc2);
  localP = localPitch(lp);
  sp2 = lc2 * lerr.xx() + ls2 * lerr.yy() + 2 * lslc * lerr.xy();
  sl2 = ls2 * lerr.xx() + lc2 * lerr.yy() - 2 * lslc * lerr.xy();
  spl = lslc * (lerr.yy() - lerr.xx()) + (lc2 - ls2) * lerr.xy();
  return MeasurementError(sp2 / (localP * localP), spl / (localP * localL), sl2 / (localL * localL));
}

References localPitch(), mathSSE::sqrt(), theDetHeight, theDistToBeam, theYAxOr, PV3DBase< T, PVType, FrameType >::x(), LocalError::xx(), LocalError::xy(), PV3DBase< T, PVType, FrameType >::y(), and LocalError::yy().

measurementPosition()

MeasurementPoint TrapezoidalStripTopology::measurementPosition ( const LocalPoint &  lp ) const

overridevirtual

Implements Topology.

Definition at line 81 of file TrapezoidalStripTopology.cc.

                                                                                         {
  return MeasurementPoint(((lp.x() * theDistToBeam / (theYAxOr * lp.y() + theDistToBeam)) - theOffset) / thePitch,
                          lp.y() / theDetHeight);
}

References theDetHeight, theDistToBeam, theOffset, thePitch, theYAxOr, PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::y().

nstrips()

int TrapezoidalStripTopology::nstrips ( ) const

overridevirtual

Implements StripTopology.

Definition at line 118 of file TrapezoidalStripTopology.cc.

{ return theNumberOfStrips; }

References theNumberOfStrips.

Referenced by ME0ReDigiProducer::getStripProperties().

pitch()

float TrapezoidalStripTopology::pitch ( ) const

overridevirtual

Pitch in the middle of the DetUnit

Implements StripTopology.

Definition at line 106 of file TrapezoidalStripTopology.cc.

{ return thePitch; }

References thePitch.

Referenced by ME0ReDigiProducer::getStripProperties(), and CSCSegtoRPC::thePoints().

radius()

float TrapezoidalStripTopology::radius ( void  ) const

inline

radius of circle passing through the middle of the det with center at the crossing of the two sides.

Definition at line 69 of file TrapezoidalStripTopology.h.

{ return theDistToBeam; }

References theDistToBeam.

Referenced by ME0ReDigiProducer::getStripProperties(), and ME0ReDigiProducer::TemporaryGeometry::TemporaryGeometry().

shiftOffset()

float TrapezoidalStripTopology::shiftOffset ( float  pitch_fraction )

protectedvirtual

Definition at line 120 of file TrapezoidalStripTopology.cc.

                                                                {
  theOffset += thePitch * pitch_fraction;
  return theOffset;
}

References theOffset, and thePitch.

strip()

float TrapezoidalStripTopology::strip ( const LocalPoint &  lp ) const

overridevirtual

Implements StripTopology.

Definition at line 72 of file TrapezoidalStripTopology.cc.

                                                                {
  float aStrip = ((lp.x() * theDistToBeam / (theYAxOr * lp.y() + theDistToBeam)) - theOffset) / thePitch;
  if (aStrip < 0)
    aStrip = 0;
  else if (aStrip > theNumberOfStrips)
    aStrip = theNumberOfStrips;
  return aStrip;
}

References theDistToBeam, theNumberOfStrips, theOffset, thePitch, theYAxOr, PV3DBase< T, PVType, FrameType >::x(), and PV3DBase< T, PVType, FrameType >::y().

Referenced by channel(), localError(), localPosition(), and stripAngle().

stripAngle()

float TrapezoidalStripTopology::stripAngle ( float  strip ) const

overridevirtual

angle between strip and symmetry axis

Implements StripTopology.

Definition at line 114 of file TrapezoidalStripTopology.cc.

                                                            {
  return std::atan(-(strip * thePitch + theOffset) * theYAxOr / theDistToBeam);
}

References strip(), theDistToBeam, theOffset, thePitch, and theYAxOr.

stripLength()

float TrapezoidalStripTopology::stripLength ( ) const

inlineoverridevirtual

det heigth (strip length in the middle)

Implements StripTopology.

Definition at line 63 of file TrapezoidalStripTopology.h.

{ return theDetHeight; }

References theDetHeight.

Referenced by RPCSynchronizer::getSimHitBx(), RPCSynchronizer::getSimHitBxAndTimingForIRPC(), ME0ReDigiProducer::getStripProperties(), RPCSimSimple::simulateNoise(), RPCSimParam::simulateNoise(), RPCSimAverage::simulateNoise(), RPCSimAverageNoise::simulateNoise(), RPCSimModelTiming::simulateNoise(), RPCSimAverageNoiseEffCls::simulateNoise(), RPCSimAverageNoiseEff::simulateNoise(), RPCSimAsymmetricCls::simulateNoise(), ME0ReDigiProducer::TemporaryGeometry::TemporaryGeometry(), CSCSegtoRPC::thePoints(), and TracktoRPC::thePoints().

Member Data Documentation

theDetHeight

float TrapezoidalStripTopology::theDetHeight

private

Definition at line 79 of file TrapezoidalStripTopology.h.

Referenced by localError(), localPosition(), localStripLength(), measurementError(), measurementPosition(), and stripLength().

theDistToBeam

float TrapezoidalStripTopology::theDistToBeam

private

Definition at line 78 of file TrapezoidalStripTopology.h.

Referenced by localError(), localPitch(), localPosition(), localStripLength(), measurementError(), measurementPosition(), radius(), strip(), and stripAngle().

theNumberOfStrips

int TrapezoidalStripTopology::theNumberOfStrips

private

Definition at line 75 of file TrapezoidalStripTopology.h.

Referenced by channel(), nstrips(), strip(), and TrapezoidalStripTopology().

theOffset

float TrapezoidalStripTopology::theOffset

private

Definition at line 77 of file TrapezoidalStripTopology.h.

Referenced by localError(), localPosition(), measurementPosition(), shiftOffset(), strip(), stripAngle(), and TrapezoidalStripTopology().

thePitch

float TrapezoidalStripTopology::thePitch

private

Definition at line 76 of file TrapezoidalStripTopology.h.

Referenced by localError(), localPitch(), localPosition(), measurementPosition(), pitch(), shiftOffset(), strip(), stripAngle(), and TrapezoidalStripTopology().

theYAxOr

int TrapezoidalStripTopology::theYAxOr

private

Definition at line 80 of file TrapezoidalStripTopology.h.

Referenced by localError(), localPitch(), localPosition(), localStripLength(), measurementError(), measurementPosition(), strip(), stripAngle(), and TrapezoidalStripTopology().