A Thin Foil High Throughput X-Ray Telescope

Niels J. Westergaard; Peter Lokke Jensen

doi:10.1117/12.966562

14 July 1986 A Thin Foil High Throughput X-Ray Telescope

Niels J. Westergaard, Peter Lokke Jensen

Proceedings Volume 0597, X-Ray Instrumentation in Astronomy; (1986) https://doi.org/10.1117/12.966562
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France

Abstract

A thin foil reflector X-ray telescope is proposed for ESA's high throughput spectroscopic X-ray mission, one of the cornerstone projects. Based on astrophysical requirements the performance specifications include large effective area at an X-ray energy of 8 keV and angular resolution better than 30 arcsec. To achieve this goal with 7 telescope units the radius of the outer mirror should be at least 30 cm, the focal length 8 m, and the mirror length 20 cm. The mirror thickness should be limited to 0.2 mm. Various mirror technologies such as dip-lacquered aluminium and electro formed nickel foils are examined. The surface roughness must also be controlled because scattering can ruin the focussing ability. A test assembly consisting of three representative mirrors has been used to investigate different supporting principles for the mirrors. The positions and surface shapes are measured mechanically and a ray-tracing program is used to translate the measurements into focussing properties.

Citation Download Citation

Niels J. Westergaard and Peter Lokke Jensen "A Thin Foil High Throughput X-Ray Telescope", Proc. SPIE 0597, X-Ray Instrumentation in Astronomy, (14 July 1986); https://doi.org/10.1117/12.966562

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