1 February 1983 Calculated Performance Of A Wolter Type I X-Ray Telescope Coated By Multilayers
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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.
R. C. Catura, W. A. Brown, E. G. Joki, R. A. Nobles, "Calculated Performance Of A Wolter Type I X-Ray Telescope Coated By Multilayers," Optical Engineering 22(1), 221140 (1 February 1983). https://doi.org/10.1117/12.7973062 . Submission:
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