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Proceedings Paper

Shaping Si, NiCo, and glass substrates via stresses in the coatings
Author(s): Xiaoli Wang; Youwei Yao; Shi Ye; Tianchen Liu; Lahsen Assoufid; Jian Cao; M. P. Ulmer
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Paper Abstract

Here we report progress toward the fabrication of adaptive or active Si X-ray mirrors via a two step process. The first step is to curve a Si flat and then coat it with Terfenol-D that will allow the shape control via the application of a magnetic field. The goal is to create a mirror whose local (a few mm-length scale) slope can be changed and left for several hours or more. The current work described here was done in on Si to demonstrate the ability to produce the initial curvature, and in parallel, work to on magnetically hard NiCo 5 cm x 5 cm square plus on a glass sample. The glass sample was used a proto-type to model making changes in two different locations on a mirror. The NiCo sample was used to show that a magnetic field can be retained in a magnetically hard substrate such that the magnetically induced stress in the Terfenol-D was able to maintain a deformation for as long as time permitted to make the measurement which was 71 hours.

Paper Details

Date Published: 9 September 2016
PDF: 9 pages
Proc. SPIE 9965, Adaptive X-Ray Optics IV, 99650D (9 September 2016);
Show Author Affiliations
Xiaoli Wang, Northwestern Univ. (United States)
Youwei Yao, Northwestern Univ. (United States)
Shi Ye, Northwestern Univ. (United States)
Tianchen Liu, Northwestern Univ. (United States)
Lahsen Assoufid, Argonne National Lab. (United States)
Jian Cao, Northwestern Univ. (United States)
M. P. Ulmer, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 9965:
Adaptive X-Ray Optics IV
Stephen L. O'Dell; Ali M. Khounsary, Editor(s)

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