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Proceedings Paper

Medium-sized grazing incidence high-energy x-ray telescopes employing continuously graded multilayers
Author(s): Karsten Dan Joensen; Finn Erland Christensen; Herbert W. Schnopper; Paul Gorenstein; Jean Susini; Peter Hoghoj; Robert Hustache; James L. Wood; K. Parker
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Paper Abstract

We present a concept of continuously graded multilayer structures for medium-sized x-ray telescopes which is based on several material combinations. We show that the theoretical reflectivity characteristics of these structures make them very advantageous when applied to high energy x-ray grazing incidence telescopes. We consider the performance of continuously graded Ni/C multilayers in a multi-focus, Kirkpatrick-Baez geometry and show a significant improvement when compared to standard coatings of gold. For a total length of 3.3 m, a total aperture of 48 cm by 48 cm, and 64 foci, we obtain an effective area of 250 cm2 at 60 keV and a FWHM field of view of 6 feet. We also show that a modular array of conical telescopes (conical approximation to a Wolter-I geometry), with the same length and aperture provides similar effective areas. Energy-dispersive x-ray reflectivity data (15 - 70 keV) is presented for the first continuously graded multilayer of this kind.

Paper Details

Date Published: 3 February 1993
PDF: 10 pages
Proc. SPIE 1736, X-Ray Detector Physics and Applications, (3 February 1993); doi: 10.1117/12.140479
Show Author Affiliations
Karsten Dan Joensen, Danish Space Research Institute (Denmark)
Finn Erland Christensen, Danish Space Research Institute (Denmark)
Herbert W. Schnopper, Danish Space Research Institute (Denmark)
Paul Gorenstein, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Jean Susini, European Synchrotron Radiation Facility (France)
Peter Hoghoj, European Synchrotron Radiation Facility (France)
Robert Hustache, European Synchrotron Radiation Facility (France)
James L. Wood, Ovonic Synthetic Materials Co. (United States)
K. Parker, Ovonic Synthetic Materials Co. (United States)

Published in SPIE Proceedings Vol. 1736:
X-Ray Detector Physics and Applications
Richard B. Hoover, Editor(s)

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