Versatile X‐UV spectrogoniometer with multilayer interference mirrors

摘要

A versatile X‐UV spectrogoniometer based on a modular system is described. The heart of the apparatus is a computer‐controlled θ‐2θ goniometer with 1.8 arcs θ angular resolution. This main unit can be connected to with a (+1, -1) double‐crystal premonochromator and a double‐mirror high‐frequency rejector. The dispersive performance of a multilayer interference mirror (MIM) and a lead stearate pseudocrystal are compared at three wavelengths: 13.3 Å (Cu‐Lα), 44.8 Å (C‐Kα), and 67.7 Å (B‐Kα). The MIM appears as a useful dispersing device for a low resolution flat ‘‘one‐crystal’’ spectrometer in this spectral region.