21 November 1996 Contact-cooled U monochromators for high heat load x-ray beamlines
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Abstract
This paper describes the design, expected performance, and preliminary test results of a contact-cooled monochromator for use on high heat load x-ray beamlines. The monochromator has a cross section in the shape of the letter U. This monochromator should be suitable for handing heat fluxes up to 5 W/mm2. As such, for the present application, it is compatible with the best internally cooled silicon crystal monochromators operating at room temperature. There are three key features in the design of this monochromator. First, it is contact cooled, thereby eliminating fabrication of cooling channels, bonding, an undesirable strains in the monochromator due to coolant-manifold-to-crystal-interface. Second, by illuminating the entire length of the crystal and extracting the central part of the reflected beam, sharp slope changes in the beam profile and thus slope errors are avoided. Last, by selecting appropriate crystal geometry and cooling locations, tangential slope error can be substantially reduced.
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Ali M. Khounsary, Ali M. Khounsary, Wenbing Yun, Wenbing Yun, Emil M. Trakhtenberg, Emil M. Trakhtenberg, Shenglan Xu, Shenglan Xu, Lahsen Assoufid, Lahsen Assoufid, Wah Keat Lee, Wah Keat Lee, "Contact-cooled U monochromators for high heat load x-ray beamlines", Proc. SPIE 2855, High Heat Flux Engineering III, (21 November 1996); doi: 10.1117/12.259834; https://doi.org/10.1117/12.259834
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