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Proceedings Paper

Uniformity results of the multilayer mirrors used in the ALEXIS ultrasoft x-ray telescopes
Author(s): Diane C. Roussel-Dupre; Frank P. Ameduri
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Paper Abstract

The Array of Low Energy X-ray Imaging Sensors (ALEXIS) experiment, a mini-satellite containing six wide angle EUV/ultrasoft X-ray telescopes, is scheduled to be launched by a Pegasus rocket into a 425 nautical mile orbit in 1992 to observe cosmic X-rays. The telescopes utilize near normal incidence optics featuring a 12.8 cm diameter, 13.52 cm radius of curvature spherical mirror with a Mo/Si multilayer coating. The multilayer coatings are tuned to wavelengths of 133, 171, and 186 A. In addition, the top layers are comprised of a unique 'wavetrap' designed to suppress the dominate background radiation at 304 A from the geocorona. We present measured performance data for these mirrors including the two dimensional uniformity of the multilayer as a function of both radius and angular rotation, the measured reflectivity at the primary wavelength and the effectiveness of the 'wavetrap'. We also discuss problems encountered due to contamination and design changes that have been made to mitigate the effect of contamination.

Paper Details

Date Published: 21 January 1993
PDF: 9 pages
Proc. SPIE 1742, Multilayer and Grazing Incidence X-Ray/EUV Optics for Astronomy and Projection Lithography, (21 January 1993); doi: 10.1117/12.140584
Show Author Affiliations
Diane C. Roussel-Dupre, Los Alamos National Lab. (United States)
Frank P. Ameduri, Los Alamos National Lab. (United States)

Published in SPIE Proceedings Vol. 1742:
Multilayer and Grazing Incidence X-Ray/EUV Optics for Astronomy and Projection Lithography
Richard B. Hoover; Arthur B. C. Walker, Editor(s)

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