spec

Software for Diffraction

hkcircle

scan along an arc in the HK-plane in reciprocal space

SYNOPSIS

hkcircle radius angle_start angle_end intervals time [expression]

DESCRIPTION

The hkcircle macro scans along a circular arc in the HK-plane in reciprocal space. The radius of the arc is given by radius and the arc runs from angle_start to angle_end. The number of data points collected will be intervals+1.

Count time is given by time, which if positive, specifies seconds and if negative, specifies monitor counts.

The optional last argument can supply expressions to be evaluated after H and K are calculated for each point. You may, for example, supply an expression to calculate values for L or include expressions to offset the values of H and K.

EXAMPLES


hkcircle 1 0 90 10 60 "H += .5; K += .5"
hkcircle 1 0 90 10 60 L=H/.125
hkcircle 1 0 360 10 60 L=0