spec

Software for Diffraction

hlradial

scan along a radius in the HL-plane in reciprocal space

SYNOPSIS

hlradial angle start end intervals time [expression]

DESCRIPTION

The hlradial macro scans along a radius in the HL-plane in reciprocal space. The angle of the arc from the positive H axis is given by angle and the scan runs from the radius given by start to the radius given by 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 L are calculated for each point. You may, for example, supply an expression to calculate values for K or include expressions to offset the values of H and L.

EXAMPLES


hlradial 45 .0 sqrt(2) 10 10
hlradial 90 0 1 20 60 "H+=.5; L+=.5"