CONTROL SYSTEM FOR X-RAY DIFFRACTOMETER SCANNING
L H Cook Jr · 1966
A time-based program controller using a prepunched tape was developed for automatic goniometer scanning of an X-ray diffractometer in which the locations of the diffraction lines are known.The program controller consists or (1) a dual-speed drive unit which moves the goniometer rapidly over portions of the diffraction pattern not under observation and slowly over the diffraction lines to be observed, and (2) an electronic control system which will scan the selected diffraction lines, print the accumulated data for each line, reset the goniometer, rewind the control tape 1 and then either stop or repeat the cycle.The control accuracy is within 0.01° Bragg 29 angle.