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Optical Engineering

Normal incidence soft x-ray telescopes
Author(s): Eberhard Adolf Spiller; R. McCorkle; Janusz S. Wilczynski; Leon Golub; George U. Nystrom; Peter Z. Takacs; Charles W. Welch
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Paper Abstract

Photos obtained during 5 mm of observation time from the flight of our 25-cm-diam normal-incidence soft x-ray (λ = 63.5 Å) telescope on September 11, 1989, are analyzed and the data are compared to the results expected from tests of the mirror surfaces. These tests cover a range of spatial periods from 25 cm to 1 Å. The photos demonstrate a resolution close to the photon shot noise limit and a reduction in the scattering of the multilayer mirror compared to a single surface for scattering angles above 1 arcmin, corresponding to surface irregularities with spatial penods below 10 μm. Our results are used to predict the possible performance of future telescopes: We conclude that sounding rocket observations might be able to reach a resolution around 0.1 arcsec. Higher resolutions will require flights of longer durations and improvements in mirror testing for the largest spatial periods.

Paper Details

Date Published: 1 August 1991
PDF: 7 pages
Opt. Eng. 30(8) doi: 10.1117/12.55915
Published in: Optical Engineering Volume 30, Issue 8
Show Author Affiliations
Eberhard Adolf Spiller, IBM Corp. (United States)
R. McCorkle, IBM Corp. (United States)
Janusz S. Wilczynski, IBM Corp. (United States)
Leon Golub, Harvard-Smithsonian Ctr. for Astrophysics (United States)
George U. Nystrom, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Peter Z. Takacs, Brookhaven National Lab. (United States)
Charles W. Welch, Lockheed Missiles & Space Co., Inc. (United States)


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