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Proceedings Paper

Low atomic number coating for XEUS silicon pore optics
Author(s): D. H. Lumb; C. P. Jensen; M. Krumrey; L. Cibik; F. Christensen; M. Collon; M. Bavdaz
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Paper Abstract

We describe a set of measurements on coated silicon substrates that are representative of the material to be used for the XEUS High Performance Pore Optics (HPO) technology. X-ray angular reflectance measurements at 2.8 and 8 keV, and energy scans of reflectance at a fixed angle representative of XEUS graze angles are presented. Reflectance is significantly enhanced for low energies when a low atomic number over-coating is applied. Modeling of the layer thicknesses and roughness is used to investigate the dependence on the layer thicknesses, metal and over coat material choices. We compare the low energy effective area increase that could be achieved with an optimized coating design.

Paper Details

Date Published: 15 July 2008
PDF: 10 pages
Proc. SPIE 7011, Space Telescopes and Instrumentation 2008: Ultraviolet to Gamma Ray, 70111D (15 July 2008); doi: 10.1117/12.789664
Show Author Affiliations
D. H. Lumb, European Space Agency, ESTEC (Netherlands)
C. P. Jensen, National Space Institute, DTU (Denmark)
M. Krumrey, Physikalisch-Technische Bundesandstalt (Germany)
L. Cibik, Physikalisch-Technische Bundesandstalt (Germany)
F. Christensen, National Space Institute, DTU (Denmark)
M. Collon, Cosine Research (Netherlands)
M. Bavdaz, European Space Agency, ESTEC (Netherlands)

Published in SPIE Proceedings Vol. 7011:
Space Telescopes and Instrumentation 2008: Ultraviolet to Gamma Ray
Martin J. L. Turner; Kathryn A. Flanagan, Editor(s)

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