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Proceedings Paper

Multilayers and crystal for a multi-bandpass monochromator
Author(s): Renfei Feng; Yuriy Platonov; David Broadway; Gene Ice; Andrea Gerson; Stewart McIntyre
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Paper Abstract

VESPERS beamline is a hard X-ray microprobe beamline dedicated to micro-diffraction and micro-fluorescence analysis at the Canadian Light Source; it requires multi-bandpass X-ray beams for different types of samples and experiments. A specially designed double crystal/multilayer monochromator was built for this purpose with three different bandpasses: 0.01%, 1.6% and 10%. The diffraction elements used for the monochromator have a triple-stripe design using Si(111) crystal as a single substrate with two differing stripes of Mo/B4C multilayers deposited thereon. The uncovered Si(111) section provides a 0.01% bandpass, while the periodic and depth-graded Mo/B4C multilayers provide 1.6% and 10% bandpasses, respectively. This paper outlines the requirements and specifications of the diffracting elements as well as the design, deposition and optimization of the multilayers. The performance of the deposited multilayer structures has been tested using Cu-Kα radiation line with a Huber diffractometer.

Paper Details

Date Published: 3 September 2008
PDF: 9 pages
Proc. SPIE 7077, Advances in X-Ray/EUV Optics and Components III, 70771Y (3 September 2008); doi: 10.1117/12.806344
Show Author Affiliations
Renfei Feng, Canadian Light Source, Inc. (Canada)
Yuriy Platonov, Rigaku Innovative Technologies, Inc. (United States)
David Broadway, Rigaku Innovative Technologies, Inc. (United States)
Gene Ice, Oak Ridge National Lab. (United States)
Andrea Gerson, The Univ of South Australia (Australia)
Stewart McIntyre, The Univ. of Western Ontario (Canada)

Published in SPIE Proceedings Vol. 7077:
Advances in X-Ray/EUV Optics and Components III
Ali M. Khounsary; Christian Morawe; Shunji Goto, Editor(s)

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