#include <DTrackCandidate_factory_FDCCathodes.h>

Inheritance diagram for DTrackCandidate_factory_FDCCathodes:

Public Member Functions
	DTrackCandidate_factory_FDCCathodes ()

	~DTrackCandidate_factory_FDCCathodes ()

const char *	Tag (void)

Private Member Functions
jerror_t	brun (JEventLoop *eventLoop, int32_t runnumber)
	Called everytime a new run number is detected. More...

jerror_t	evnt (JEventLoop *eventLoop, uint64_t eventnumber)
	Called every event. More...

jerror_t	erun (void)
	Called everytime run number changes, provided brun has been called. More...

jerror_t	fini (void)
	Called after last event of last event source has been processed. More...

jerror_t	GetPositionAndMomentum (const DFDCSegment *segment)

jerror_t	GetPositionAndMomentum (DVector3 &pos, DVector3 &mom)

jerror_t	GetPositionAndMomentum (vector< const DFDCSegment * >segments, DVector3 &pos, DVector3 &mom)

jerror_t	GetPositionAndMomentum (const DFDCSegment *segment, DVector3 &pos, DVector3 &mom)

double	GetCharge (const DVector3 &pos, const DFDCSegment *segment)

double	GetCharge (const DVector3 &pos, vector< const DFDCSegment * >segments)

double	DocaSqToHelix (const DFDCPseudo *hit)

DFDCSegment *	GetTrackMatch (DFDCSegment segment, vector< DFDCSegment >package, unsigned int &match_id)

void	LinkSegments (unsigned int pack1, vector< DFDCSegment * >packages[4], vector< pair< const DFDCSegment , const DFDCSegment > > &paired_segments, vector< vector< int > > &is_paired)

double	Match (double p)

bool	GetTrackMatch (double q, DVector3 &pos, DVector3 &mom, const DFDCSegment *segment)

bool	LinkStraySegment (const DFDCSegment *segment)

bool	LinkSegmentsHough (vector< pair< unsigned int, unsigned int > > &unused_segements, vector< DFDCSegment * >packages[4], vector< vector< int > > &is_paired)

Private Attributes
const DMagneticFieldMap *	bfield

DMagneticFieldStepper *	stepper

bool	DEBUG_HISTS

bool	USE_FDC

TH2F *	match_dist_fdc

TH2F *	match_center_dist2

vector< double >	z_wires

double	TARGET_Z

double	BEAM_VAR

double	FDC_HOUGH_THRESHOLD

double	FactorForSenseOfRotation

double	xc

double	yc

double	rc

double	q

double	tanl

double	xs

double	ys

double	zs

double	p

double	cosphi

double	sinphi

double	twokappa

double	cotl

Detailed Description

Find track candidates in the Forward Drift Chambers (FDC). This will try to form candidates from hits found in the FDC. Roughly, clusters of hits in single packages (6 wire planes) are found and fit. The fit is propagated to adjacent packages to link them up with hit clusters there. Eventually, all hits are used to fit using a Reimann method to obtain the parameters of the candidate.

These candidates will be merged with those from the FDC in the DTrackCandidate_factory class.

Definition at line 38 of file DTrackCandidate_factory_FDCCathodes.h.

Constructor & Destructor Documentation

DTrackCandidate_factory_FDCCathodes::DTrackCandidate_factory_FDCCathodes ( )

inline

Definition at line 40 of file DTrackCandidate_factory_FDCCathodes.h.

References DEBUG_HISTS.

DTrackCandidate_factory_FDCCathodes::~DTrackCandidate_factory_FDCCathodes ( )

inline

Definition at line 44 of file DTrackCandidate_factory_FDCCathodes.h.

Member Function Documentation

jerror_t DTrackCandidate_factory_FDCCathodes::brun	(	JEventLoop *	eventLoop,
		int32_t	runnumber
	)

private

Called everytime a new run number is detected.

This factory links segments in the FDC packages into track candidates by swimming through the field from one package to the next.

DTrackCandidate_factory_FDCCathodes::brun():

Definition at line 24 of file DTrackCandidate_factory_FDCCathodes.cc.

References _DBG_, BEAM_VAR, bfield, dapp, DEBUG_HISTS, FactorForSenseOfRotation, FDC_HOUGH_THRESHOLD, DApplication::GetBfield(), DMagneticFieldMap::GetBz(), DApplication::GetDGeometry(), DGeometry::GetFDCZ(), DGeometry::GetTargetZ(), match_center_dist2, match_dist_fdc, DMagneticFieldStepper::SetStepSize(), stepper, TARGET_Z, USE_FDC, and z_wires.

double DTrackCandidate_factory_FDCCathodes::DocaSqToHelix ( const DFDCPseudo * hit )

private

Definition at line 387 of file DTrackCandidate_factory_FDCCathodes.cc.

References cosphi, cotl, DCoordinateSystem::origin, sin(), sinphi, twokappa, DFDCPseudo::wire, x, xs, DFDCPseudo::xy, y, ys, and zs.

Referenced by GetTrackMatch().

jerror_t DTrackCandidate_factory_FDCCathodes::erun ( void )

private

Called everytime run number changes, provided brun has been called.

Definition at line 85 of file DTrackCandidate_factory_FDCCathodes.cc.

References stepper.

jerror_t DTrackCandidate_factory_FDCCathodes::evnt	(	JEventLoop *	eventLoop,
		uint64_t	eventnumber
	)

private

Called every event.

Definition at line 128 of file DTrackCandidate_factory_FDCCathodes.cc.

References DHelicalFit::AddHit(), DHelicalFit::AddHitXYZ(), BEAM_VAR, bfield, DTrackCandidate::chisq, DFDCSegment::chisq, DHelicalFit::chisq, DTrackCandidate_segment_cmp(), FactorForSenseOfRotation, DHelicalFit::FindSenseOfRotation(), DHelicalFit::FitCircle(), DHelicalFit::FitTrack_FixedZvertex(), DHelicalFit::FitTrackRiemann(), DMagneticFieldMap::GetBz(), GetPositionAndMomentum(), DHelicalFit::h, LinkSegments(), LinkSegmentsHough(), LinkStraySegment(), DTrackCandidate::Ndof, DFDCSegment::Ndof, DHelicalFit::ndof, DCoordinateSystem::origin, p, DFDCSegment::package, PiMinus, PiPlus, DHelicalFit::PruneHit(), DFDCSegment::q, q, DHelicalFit::r0, DTrackCandidate::rc, DFDCSegment::rc, rc, DKinematicData::setMomentum(), DKinematicData::setPID(), DKinematicData::setPosition(), size, tanl, DHelicalFit::tanl, TARGET_Z, temp, USE_FDC, DFDCPseudo::wire, DHelicalFit::x0, DTrackCandidate::xc, DFDCSegment::xc, xc, DFDCPseudo::xy, DHelicalFit::y0, DTrackCandidate::yc, DFDCSegment::yc, and yc.

jerror_t DTrackCandidate_factory_FDCCathodes::fini ( void )

private

Called after last event of last event source has been processed.

Definition at line 97 of file DTrackCandidate_factory_FDCCathodes.cc.

References stepper.

double DTrackCandidate_factory_FDCCathodes::GetCharge	(	const DVector3 &	pos,
		const DFDCSegment *	segment
	)

private

double DTrackCandidate_factory_FDCCathodes::GetCharge	(	const DVector3 &	pos,
		vector< const DFDCSegment * >	segments
	)

private

jerror_t DTrackCandidate_factory_FDCCathodes::GetPositionAndMomentum ( const DFDCSegment * segment )

private

Definition at line 477 of file DTrackCandidate_factory_FDCCathodes.cc.

References bfield, cosphi, cotl, FactorForSenseOfRotation, DMagneticFieldMap::GetBz(), DFDCSegment::hits, p, DFDCSegment::phi0, DFDCSegment::Phi1, DFDCSegment::q, DFDCSegment::rc, sin(), sinphi, DFDCSegment::tanl, twokappa, DFDCSegment::xc, xs, DFDCSegment::yc, ys, DFDCSegment::z_vertex, and zs.

Referenced by evnt(), GetTrackMatch(), LinkSegmentsHough(), and LinkStraySegment().

jerror_t DTrackCandidate_factory_FDCCathodes::GetPositionAndMomentum	(	DVector3 &	pos,
		DVector3 &	mom
	)

private

jerror_t DTrackCandidate_factory_FDCCathodes::GetPositionAndMomentum	(	vector< const DFDCSegment * >	segments,
		DVector3 &	pos,
		DVector3 &	mom
	)

private

Definition at line 514 of file DTrackCandidate_factory_FDCCathodes.cc.

References bfield, FactorForSenseOfRotation, DMagneticFieldMap::GetBz(), DCoordinateSystem::origin, py, q, rc, sin(), tanl, DFDCPseudo::wire, x, xc, DFDCPseudo::xy, y, yc, zmax, and zmin.

jerror_t DTrackCandidate_factory_FDCCathodes::GetPositionAndMomentum	(	const DFDCSegment *	segment,
		DVector3 &	pos,
		DVector3 &	mom
	)

private

Definition at line 570 of file DTrackCandidate_factory_FDCCathodes.cc.

References bfield, FactorForSenseOfRotation, DMagneticFieldMap::GetBz(), DFDCSegment::hits, DCoordinateSystem::origin, py, DFDCSegment::q, DFDCSegment::rc, sin(), DFDCSegment::tanl, DFDCPseudo::wire, x, DFDCSegment::xc, DFDCPseudo::xy, y, DFDCSegment::yc, and zmin.

DFDCSegment * DTrackCandidate_factory_FDCCathodes::GetTrackMatch	(	DFDCSegment *	segment,
		vector< DFDCSegment * >	package,
		unsigned int &	match_id
	)

private

Definition at line 405 of file DTrackCandidate_factory_FDCCathodes.cc.

References DEBUG_HISTS, DocaSqToHelix(), GetPositionAndMomentum(), DFDCSegment::hits, Match(), match_center_dist2, match_dist_fdc, p, DFDCSegment::xc, and DFDCSegment::yc.

Referenced by LinkSegments(), and LinkStraySegment().

bool DTrackCandidate_factory_FDCCathodes::GetTrackMatch	(	double	q,
		DVector3 &	pos,
		DVector3 &	mom,
		const DFDCSegment *	segment
	)

private

Definition at line 638 of file DTrackCandidate_factory_FDCCathodes.cc.

References DFDCSegment::hits, Match(), DCoordinateSystem::origin, DMagneticFieldStepper::SetCharge(), stepper, DMagneticFieldStepper::SwimToPlane(), DFDCPseudo::wire, and DFDCPseudo::xy.

void DTrackCandidate_factory_FDCCathodes::LinkSegments	(	unsigned int	pack1,
		vector< DFDCSegment * >	packages[4],
		vector< pair< const DFDCSegment , const DFDCSegment > > &	paired_segments,
		vector< vector< int > > &	is_paired
	)

private

Definition at line 610 of file DTrackCandidate_factory_FDCCathodes.cc.

References GetTrackMatch(), and size.

Referenced by evnt().

bool DTrackCandidate_factory_FDCCathodes::LinkSegmentsHough	(	vector< pair< unsigned int, unsigned int > > &	unused_segements,
		vector< DFDCSegment * >	packages[4],
		vector< vector< int > > &	is_paired
	)