Acts::CylindricalSpacePointGrid2::Config Struct Reference

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

#include <Acts/Seeding2/CylindricalSpacePointGrid2.hpp>

Collaboration diagram for Acts::CylindricalSpacePointGrid2::Config:

Public Attributes
float	bFieldInZ = 0 * UnitConstants::T
	magnetic field
std::optional< GridBinFinder< 3ul > >	bottomBinFinder
	bin finder for bottom space points
float	cotThetaMax = 10.01788
	maximum forward direction expressed as cot(theta)
float	deltaRMax = 270 * UnitConstants::mm
	maximum distance in r from middle space point to bottom or top space point
float	impactMax = 0 * UnitConstants::mm
	maximum impact parameter in mm
int	maxPhiBins = 10000
	maximum number of phi bins
float	minPt = 0 * UnitConstants::MeV
	minimum pT
std::array< std::vector< std::size_t >, 3ul >	navigation
	navigation structure for the grid
int	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.
std::optional< GridBinFinder< 3ul > >	topBinFinder
	bin finder for top space points
std::vector< float >	zBinEdges {}
	enable non equidistant binning in z
float	zMax = 2800 * UnitConstants::mm
	maximum extension of sensitive detector layer relevant for seeding in positive direction in z
float	zMin = -2800 * UnitConstants::mm
	minimum extension of sensitive detector layer relevant for seeding in negative direction in z

Detailed Description

Configuration parameters for the cylindrical space point grid.

Member Data Documentation

phiBinDeflectionCoverage

int Acts::CylindricalSpacePointGrid2::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::CylindricalSpacePointGrid2::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::CylindricalSpacePointGrid2::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!