A11 - slicers

slicers

tools used to extract 1D data from 2D scattering data

allow users to define regions of interest on a 2D plot (eg: a box or a wedge) and extract the average or sum of the data within that region
this creates a new 1D scattering curve for analysis

annulus

plots a 1D average of an annulus area defined in 2D
defines two rings of radii $r_{1}$ and $r_{2}$ ( $Q_{1}$ and $Q_{2}$ )
all $Q$ points at a constant angle, $ϕ$ , are averaged together to provide a 1D array in $ϕ$ from $0$ to $180 °$

box

plots a 1D average of a rectangular area defined in 2D
a rectangular area is defined: $x_{1}, x_{2}, y_{1}, y_{2}$
the direction of the average is defined
all points from $y_{1}$ to $y_{2}$ are averaged as a function of $Q_{x}$ , and from $x_{1}$ to $x_{2}$ as a function of $Q_{y}$

sector

plots a 1D average of a sector area defined in 2D
the sectors all go though a single point as $O = (0, 0)$
a sector is defined, centred around a main line passing through $O$ at a user-defined angle, $θ$
two side lines, also passing though $O$ , at angles $- ϕ$ and $ϕ$ around the main line define the sector itself
all points at a constant $Q$ are averaged to provide a 1D array in $Q$

wedge

it is a cross between the sector and the annulus
plots a 1D average of a wedge area defined in 2D, in either the $Q$ or the $ϕ$ direction
a wedge area is defined between two radial lines passing through $O$ (similar to the sector), and two rings at $Q_{1}$ and $Q_{2}$ (similar to the annulus)
all $Q$ points at a constant $ϕ$ are averaged, or vice versa