UHV (Ultra-High Vacuum) Double Crystal Monochromator Design

摘要

An ultra-high vacuum double-crystal fixed-exit x-ray monochromator has been designed and built for soft X-ray (0.8-8 KeV) spectroscopic studies. This unit, currently installed at the NSLS on beamline X-11B, uses two crystal carousels, each of which can hold four different crystals to allow crystal changes without opening the chamber. The incident crystal carousel, which only rotates, is water cooled to remove the incident beam heat load. The second carousel, which rotates and translates parallel to the beam axis, can be heated to equilibrate crystal temperatures. Design principles and results of preliminary tests are presented. 5 refs., 4 figs. (ERA citation 13:015652)