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Proceedings Paper

Grazing incidence Fe-line telescopes using W/B4C multilayers
Author(s): Karsten Dan Joensen; Paul Gorenstein; Finn Erland Christensen; George Gutman
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Paper Abstract

Traditional high-Z coated X-ray telescopes for the >= 1 keV range all have a loss of throughput with higher energies, owing to the inverse proportionality between the critical angle and energy. We have shown that this can, to some degree, be countered by employing multilayers on the outermost reflectors. A W/B4C multilayer has been fabricated and its 8 keV X-ray reflectivity measured and modeled, yielding an interface-roughness of 3.6 angstroms. This measurement and the resulting model-fit form the basis for computing the performance of `AXAF-S'-sized conical and Kirkpatrick-Baez telescopes. Depending on the specifics of the design, a factor 3 - 5 increased throughput was obtained in a narrow energy band, or a 30 - 100% increase in a wider-band. This throughput ia gained at the expense of the throughput at 2 - 4 keV, which is reduced by 20 - 30%.

Paper Details

Date Published: 1 February 1994
PDF: 8 pages
Proc. SPIE 2011, Multilayer and Grazing Incidence X-Ray/EUV Optics II, (1 February 1994); doi: 10.1117/12.167211
Show Author Affiliations
Karsten Dan Joensen, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Paul Gorenstein, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Finn Erland Christensen, Danish Space Research Institute (Denmark)
George Gutman, Ovonic Synthetic Materials Co. (United States)

Published in SPIE Proceedings Vol. 2011:
Multilayer and Grazing Incidence X-Ray/EUV Optics II
Richard B. Hoover, Editor(s)

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