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Curved diffractive x-ray optics for astronomy
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Paper Abstract

We report on a concept for curved diffractive X-ray optics (CDXO). CDXO would enable potential new optical designs for X-ray instruments, such as a two element spectrometer, in which the secondary element of an X- ray mirror pair is patterned with an X-ray grating. A two-element spectrometer design eliminates the grating assembly, resulting in decreased instrument mass and reduced power requirements. In addition, a two-element spectrometer may realize cost/schedule savings by eliminating a separate grating alignment effort, and yield increased effective area over three element designs. We present a raytrace concept study of a two-element spectrometer compact enough to fit within a sounding rocket payload. We also review the progress made in electron-beam lithography (EBL) techniques that would enable curved diffractive X-ray optics to be patterned, and outline a procedure by which the accuracy of the EBL patterning process can be measured interferometrically.

Paper Details

Date Published: 9 September 2019
PDF: 9 pages
Proc. SPIE 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX, 1111910 (9 September 2019); doi: 10.1117/12.2528817
Show Author Affiliations
Casey T. DeRoo, The Univ. of Iowa (United States)
Randall L. McEntaffer, The Pennsylvania State Univ. (United States)
Benjamin D. Donovan, The Pennsylvania State Univ. (United States)
Fabien Grisé, The Pennsylvania State Univ. (United States)
William W. Zhang, NASA Goddard Space Flight Ctr. (United States)
Maximilien Collon, cosine B.V. (Netherlands)
Nicolas Barrière, cosine B.V. (Netherlands)

Published in SPIE Proceedings Vol. 11119:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX
Stephen L. O'Dell; Giovanni Pareschi, Editor(s)

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