Computer Programs for Automation of Two Small-Angle X-Ray Scattering Diffractometers.

摘要

SPASTIC 76is an update of previously reported programs written for a minicomputer to permit data acquisition with a small-angle X-ray diffractometer. SPASTIC denotes System for Programming Angles, Scaler,and Timer by Internal Counting,and indicates the general approach used for automation,involving a simple interface and stepping motor control. The present programs are written for two diffractometers of the Bonse-Hart and the Kratky designs,and run on a PDP-8L computer with 8,192words of core memory. The various programs include routines for finding the zero position and integral breadth of the primary beam,and for step-scanning through the scattering regions. The latter routine incorporates integrations for the Porod invariant. (Author)