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Journal of Astronomical Telescopes, Instruments, and Systems • Open Access

Line spread functions of blazed off-plane gratings operated in the Littrow mounting

Paper Abstract

Future soft x-ray (10 to 50 Å) spectroscopy missions require higher effective areas and resolutions to perform critical science that cannot be done by instruments on current missions. An x-ray grating spectrometer employing off-plane reflection gratings would be capable of meeting these performance criteria. Off-plane gratings with blazed groove facets operating in the Littrow mounting can be used to achieve excellent throughput into orders achieving high resolutions. We have fabricated two off-plane gratings with blazed groove profiles via a technique that uses commonly available microfabrication processes, is easily scaled for mass production, and yields gratings customized for a given mission architecture. Both fabricated gratings were tested in the Littrow mounting at the Max Planck Institute for Extraterrestrial Physics (MPE) PANTER x-ray test facility to assess their performance. The line spread functions of diffracted orders were measured, and a maximum resolution of 800±20 is reported. In addition, we also observe evidence of a blaze effect from measurements of relative efficiencies of the diffracted orders.

Paper Details

Date Published: 25 April 2016
PDF: 15 pages
J. Ast. Inst. Sys. 2(2) 025001 doi: 10.1117/1.JATIS.2.2.025001
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 2, Issue 2
Show Author Affiliations
Casey T. DeRoo, The Univ. of Iowa (United States)
Randall L. McEntaffer, The Univ. of Iowa (United States)
Drew M. Miles, The Univ. of Iowa (United States)
Thomas J. Peterson, The Univ. of Iowa (United States)
Hannah R. Marlowe, The Univ. of Iowa (United States)
James H. Tutt, The Univ. of Iowa (United States)
Benjamin D. Donovan, The Univ. of Iowa (United States)
Benedikt Menz, Max-Planck-Institut für extraterrestrische Physik (Germany)
Vadim Burwitz, Max-Planck-Institut für extraterrestrische Physik (Germany)
Gisela Hartner, Max-Planck-Institut für extraterrestrische Physik (Germany)
Ryan Allured, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Randall K. Smith, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Ramses Günther, cosine B.V. (Netherlands)
Alex Yanson, cosine Science & Computing B.V. (Netherlands)
Giuseppe Vacanti, cosine Science & Computing B.V. (Netherlands)
Marcelo Ackermann, cosine B.V. (Netherlands)


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