Curved diffractive x-ray optics for astronomy

Casey T. DeRoo; Randall L. McEntaffer; Benjamin D. Donovan; Fabien Grisé; William W. Zhang; Maximilien Collon; Nicolas Barrière

doi:10.1117/12.2528817

9 September 2019 Curved diffractive x-ray optics for astronomy

Casey T. DeRoo, Randall L. McEntaffer, Benjamin D. Donovan, Fabien Grisé, William W. Zhang, Maximilien Collon, Nicolas Barrière

Author Affiliations +

Proceedings Volume 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX; 1111910 (2019) https://doi.org/10.1117/12.2528817
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

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.

Conference Presentation

Citation Download Citation

Casey T. DeRoo, Randall L. McEntaffer, Benjamin D. Donovan, Fabien Grisé, William W. Zhang, Maximilien Collon, and Nicolas Barrière "Curved diffractive x-ray optics for astronomy", Proc. SPIE 11119, Optics for EUV, X-Ray, and Gamma-Ray Astronomy IX, 1111910 (9 September 2019); https://doi.org/10.1117/12.2528817

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