Contact-cooled U-monochromators for high-heat-load x-ray beamlines

Ali M. Khounsary; Wenbing Yun; Emil M. Trakhtenberg; Shenglan Xu; Lahsen Assoufid; Wah Keat Lee

doi:10.1117/12.259880

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22 November 1996 Contact-cooled U-monochromators for high heat load x-ray beamlines

Ali M. Khounsary, Wenbing Yun, Emil M. Trakhtenberg, Shenglan Xu, Lahsen Assoufid, Wah Keat Lee

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Proceedings Volume 2856, Optics for High-Brightness Synchrotron Radiation Beamlines II; (1996) https://doi.org/10.1117/12.259880
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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, and 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, Wenbing Yun, Emil M. Trakhtenberg, Shenglan Xu, Lahsen Assoufid, and Wah Keat Lee "Contact-cooled U-monochromators for high heat load x-ray beamlines", Proc. SPIE 2856, Optics for High-Brightness Synchrotron Radiation Beamlines II, (22 November 1996); https://doi.org/10.1117/12.259880

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