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Proceedings Paper

Optical design of the x-ray telescope for XEUS
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Paper Abstract

XEUS is a single focus X-ray telescope which will provide a collecting area of 10-20 m2 at 1 keV with angular resolution 2-5 arc seconds. Such a large area can be achieved with low mass using pore optics manufactured from silicon. The aperture utilisation of the pore optics is ~ 0:5 and with an aperture diameter of 7 m and gold reflecting surfaces the effective area can be 14 m2 at 1 keV and 1.5 m2 at 8 keV, providing it is possible to launch the required mass. Diffraction imposes a limit on the angular resolution that can be obtained with pore optics. If the focal length is 30 m then the angular resolution limit would be ~ 1 arc second but the pore size must be 0.2 mm. If the pore size is limited by manufacturing to 0.6 mm then the goal of 2 arc seconds half energy width will require a focal length ≥ 40 m. The hard X-ray response can be extended using multilayer coatings on the innermost shells giving ~ 1270 cm2 effective area at 40 keV for an increase in Si mass of ~ 96 kg.

Paper Details

Date Published: 8 September 2005
PDF: 8 pages
Proc. SPIE 5900, Optics for EUV, X-Ray, and Gamma-Ray Astronomy II, 59000H (8 September 2005); doi: 10.1117/12.615823
Show Author Affiliations
R. Willingale, Univ. of Leicester (United Kingdom)
H. Kunieda, Japan Aerospace Exploration Agency (Japan)
T. Okajima, Johns Hopkins Univ. (United States)
M. Naitoh, Nagoya Univ. (Japan)

Published in SPIE Proceedings Vol. 5900:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy II
Oberto Citterio; Stephen L. O'Dell, Editor(s)

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