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Optical Engineering

Calculated Performance Of A Wolter Type I X-Ray Telescope Coated By Multilayers
Author(s): R. C. Catura; W. A. Brown; E. G. Joki; R. A. Nobles
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Paper Abstract

Deposition of multilayered diffraction coatings on the reflecting surfaces of a Wolter Type I x-ray telescope offers the potential of using Bragg reflection to achieve enhanced effective area in selected high energy bandpasses. The structure of a gold-carbon multilayer has been optimized for study of 1.8 A iron-line emission with an x-ray telescope designed for observations from Spacelab. The response of this mirror assembly has been calculated as a function of x-ray energy, and the resulting effective area is enhanced by a factor of ten and peaks at 160 cm2 with a bandpass of 0.4 keV FWHM. This enhanced response is sufficient to allow study of the angular distribution of iron-line emission from the 20 brightest cluster x-ray sources during a seven day Spacelab mission. The possibility of achieving x-ray imaging in narrow bandpasses at even higher energies has been investigated. We conclude that it should be possible to achieve effective areas of approximately 5 cm2 in bandpasses -1 keV wide for energies in the 15 to 25 keV range, a spectral region of much importance during the impulsive phase of solar flares.

Paper Details

Date Published: 1 February 1983
PDF: 5 pages
Opt. Eng. 22(1) 221140 doi: 10.1117/12.7973062
Published in: Optical Engineering Volume 22, Issue 1
Show Author Affiliations
R. C. Catura, Lockheed Palo Alto Research Laboratory (United States)
W. A. Brown, Lockheed Palo Alto Research Laboratory (United States)
E. G. Joki, Lockheed Palo Alto Research Laboratory (United States)
R. A. Nobles, Lockheed Palo Alto Research Laboratory (United States)

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