X-Ray diffraction method and apparatus

Abstract

X-ray diffraction method and apparatus, especially for studying polycrystalline and liquid substances, are disclosed which employ monochromator focussing on a goniometer circle along whose periphery detector means are movable at twice the angular speed with which a specimen is rotatable in the goniometer center, around the same axis. The specimen is always in the monochromatic convergent beam. The goniometer circle is arranged such that its periphery intersects the longitudinal monochromator center where a pivot may be provided. By selecting the distance between the X-ray source (line focus) and the monochromator center to equal the circle diameter, symmetric focussing is possible. Precision diaphragm means serve to narrow the convergent beams for combined transmission and back-reflection scans that may be quickly effected for intensity and profile evaluation. Special sample holders permit fast exchange of preadjusted specimens and rotation of flat samples parallel to their surface plane for ascertaining preferred orientations (if any).

Dependencies are inferred from the claim text.