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Proceedings Paper

Is colder better? Exploring the feasibility of liquid-helium-cooled optics
Author(s): Lahsen Assoufid; Dennis M. Mills; Albert T. Macrander; Gordon Tajiri
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Paper Abstract

Both simulations and recent experiments conducted at the Advanced Photon Source showed that the performance of liquid- nitrogen-cooled single-silicon crystal monochromators can degrade in a very rapid nonlinear fashion as the power and/or power density is increased. As a further step towards improving the performance of silicon optics, we propose cooling with liquid helium, which dramatically improves the thermal properties of silicon beyond that of liquid nitrogen and brings the performance of single silicon-crystal-based synchrotron radiation optics up to the ultimate limit. The benefits of liquid helium cooling as well as some of the associated technical challenges will be discussed, and results of thermal and structural finite elements simulations comparing the performance of silicon monochromators cooled with liquid nitrogen and helium will be given.

Paper Details

Date Published: 16 November 1999
PDF: 10 pages
Proc. SPIE 3773, X-Ray Optics Design, Performance, and Applications, (16 November 1999); doi: 10.1117/12.370108
Show Author Affiliations
Lahsen Assoufid, Argonne National Lab. (United States)
Dennis M. Mills, Argonne National Lab. (United States)
Albert T. Macrander, Argonne National Lab. (United States)
Gordon Tajiri, Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 3773:
X-Ray Optics Design, Performance, and Applications
Ali M. Khounsary; Andreas K. Freund; Tetsuya Ishikawa; George Srajer; Jonathan C. Lang, Editor(s)

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