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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 52, Iss. 27 — Sep. 20, 2013
  • pp: 6824–6833

Design and fabrication of a supermirror with smooth and broad response for hard x-ray telescopes

Youwei Yao, Hideyo Kunieda, Hironori Matsumoto, Keisuke Tamura, and Yusuke Miyata  »View Author Affiliations


Applied Optics, Vol. 52, Issue 27, pp. 6824-6833 (2013)
http://dx.doi.org/10.1364/AO.52.006824


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Abstract

We present our design and fabrication scheme of a supermirror for hard x-ray telescopes to improve the performance of reflection. Supermirrors are designed to achieve target reflectivity profiles with small ripples in the interesting energy range with a limited number of layer pairs. Starting from conventional design methods, we optimized the thickness distribution of the structure using a numerical approach with the merit function established for this application. As an example, a platinum–carbon supermirror structure of 123 layer pairs with a varying d-space of 2–6 nm was designed to enhance the reflectivity in the energy range from 11 to 55 keV with a flat top at a grazing angle of 0.28 deg. The multilayer thus designed was deposited on a float glass by our DC magnetron sputtering system. The reflectivity profile was successfully measured to be 20% with little oscillation in all energy band of interest.

© 2013 Optical Society of America

OCIS Codes
(230.4170) Optical devices : Multilayers
(310.0310) Thin films : Thin films
(340.0340) X-ray optics : X-ray optics
(340.7470) X-ray optics : X-ray mirrors
(350.1260) Other areas of optics : Astronomical optics
(310.4165) Thin films : Multilayer design

ToC Category:
Thin Films

History
Original Manuscript: May 14, 2013
Revised Manuscript: August 18, 2013
Manuscript Accepted: August 18, 2013
Published: September 20, 2013

Citation
Youwei Yao, Hideyo Kunieda, Hironori Matsumoto, Keisuke Tamura, and Yusuke Miyata, "Design and fabrication of a supermirror with smooth and broad response for hard x-ray telescopes," Appl. Opt. 52, 6824-6833 (2013)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-52-27-6824


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