Fabrication and Diffraction Efficiency of a Large-format, Replicated X-Ray Reflection Grating

Drew M. Miles, Jake A. McCoy, Randall L. McEntaffer, Chad M. Eichfeld, Guy Lavallee, Michael Labella, William Drawl, Bangzhi Liu, Casey T. Deroo, Tyler Steiner

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

We present the methodology used to fabricate an X-ray reflection grating and describe a technique for grating replication. Further, we present the experimental procedure and results of a study to measure the diffraction efficiency of a replicated X-ray reflection grating in an extreme off-plane geometry. The blazed grating demonstrates a total diffraction efficiency of ∼60% from 0.34 to 1.2 keV at a grazing angle of ∼1.5, with single-order efficiency ranging from ∼35% to 65% for energies within the blaze envelope. The diffraction efficiency of the grating measured relative to the reflectivity of the metal coating averages ∼90% above 0.34 keV. Data collected as a function of beam position on the grating indicate a relative variation in total efficiency of <1% rms across the grating surface.

Original languageEnglish (US)
Article number95
JournalAstrophysical Journal
Volume869
Issue number2
DOIs
StatePublished - Dec 20 2018

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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