Configuration parameters for the spherical space point grid. More...

#include <Acts/Seeding/SphericalSpacePointGrid.hpp>

Collaboration diagram for Acts::Experimental::SphericalSpacePointGrid::Config:

Public Attributes
float	bFieldInZ = 0 * UnitConstants::T
	magnetic field
GridBinFinder< GridType::DIM >	bottomBinFinder {1, 1, 0}
	bin finder for bottom space points.
float	deltaRMax = 270 * UnitConstants::mm
	maximum distance in r from middle space point to bottom or top space point
std::vector< float >	etaBinEdges {}
	enable non equidistant binning in eta (edges given in pseudorapidity; mapped to cot(theta) = sinh(eta) internally)
float	etaBinSize = 0.8f
	width of the equidistant eta bins used when etaBinEdges is empty
float	etaMax = 4
	maximum pseudorapidity relevant for seeding
float	etaMin = -4
	minimum pseudorapidity relevant for seeding
float	impactMax = 0 * UnitConstants::mm
	maximum impact parameter in mm
std::uint32_t	maxPhiBins = 10000
	maximum number of phi bins
float	minPt = 0 * UnitConstants::MeV
	minimum pT
std::array< std::vector< std::size_t >, GridType::DIM >	navigation
	navigation structure for the grid
std::uint32_t	phiBinDeflectionCoverage = 1
	Multiplicator for the number of phi-bins.
float	phiMax = std::numbers::pi_v<float>
	maximum phi value for phiAxis construction
float	phiMin = -std::numbers::pi_v<float>
	minimum phi value for phiAxis construction
std::vector< float >	rBinEdges {}
	enable non equidistant binning in r
float	rMax = 600 * UnitConstants::mm
	maximum extension of sensitive detector layer relevant for seeding as distance from x=y=0 (i.e.
float	rMin = 0 * UnitConstants::mm
	minimum extension of sensitive detector layer relevant for seeding as distance from x=y=0 (i.e.
GridBinFinder< GridType::DIM >	topBinFinder {1, 1, 0}
	bin finder for top space points.

Detailed Description

Configuration parameters for the spherical space point grid.

Member Data Documentation

◆ bottomBinFinder

GridBinFinder<GridType::DIM> Acts::Experimental::SphericalSpacePointGrid::Config::bottomBinFinder {1, 1, 0}

bin finder for bottom space points.

Defaults to the neighbouring bins in phi and eta, and the same bin in r.

◆ phiBinDeflectionCoverage

std::uint32_t Acts::Experimental::SphericalSpacePointGrid::Config::phiBinDeflectionCoverage = 1

Multiplicator for the number of phi-bins.

The minimum number of phi-bins depends on min_pt, magnetic field: 2*pi/(minPT particle phi-deflection). phiBinDeflectionCoverage is a multiplier for this number. If numPhiNeighbors (in the configuration of the BinFinders) is configured to return 1 neighbor on either side of the current phi-bin (and you want to cover the full phi-range of minPT), leave this at 1.

◆ rMax

float Acts::Experimental::SphericalSpacePointGrid::Config::rMax = 600 * UnitConstants::mm

maximum extension of sensitive detector layer relevant for seeding as distance from x=y=0 (i.e.

in r)

◆ rMin

float Acts::Experimental::SphericalSpacePointGrid::Config::rMin = 0 * UnitConstants::mm

minimum extension of sensitive detector layer relevant for seeding as distance from x=y=0 (i.e.

in r) WARNING: if rMin is smaller than impactMax, the bin size will be 2*pi, which will make seeding very slow!

◆ topBinFinder

GridBinFinder<GridType::DIM> Acts::Experimental::SphericalSpacePointGrid::Config::topBinFinder {1, 1, 0}

bin finder for top space points.