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Proceedings Paper

Superfinish technology for enhanced grazing incidence reflectivity in x-ray telescopes
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Paper Abstract

High performance x-ray Wolter I telescopes require especially at high energies excellent specular mirror shell reflectivity features to collect grazing incidence radiation. Applying galvanoplastic techniques the surface quality of complementary mandrels can be replicated on the mirror shells with negligible degradation only. Therefore, adequate surface finish by advanced superpolishing of the mandrels is a strong prerequisite in order to improve the specularly reflected portion of the incoming x-ray light. For that reason, a new surface technology was developed within the frame of the JET-X mirror assembly project providing reduced high frequency components of the surface roughness correlated with the reduction of mandrel surface scattering (diffuse reflection). At high x-ray energies (8.1 keV) the measured encircled energy image of mirror shells replicated from these mandrels was up to 3 times better than from untreated mandrels.

Paper Details

Date Published: 19 July 1996
PDF: 8 pages
Proc. SPIE 2805, Multilayer and Grazing Incidence X-Ray/EUV Optics III, (19 July 1996); doi: 10.1117/12.245106
Show Author Affiliations
Roland Graue, Kayser-Threde GmbH (Germany)
Giuseppe Valsecchi, Media Lario s.r.l. (Italy)

Published in SPIE Proceedings Vol. 2805:
Multilayer and Grazing Incidence X-Ray/EUV Optics III
Richard B. Hoover; Arthur B. C. Walker II, Editor(s)

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