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Proceedings Paper

Substrates and mounting techniques for the High-Energy Focusing Telescope (HEFT)
Author(s): Charles J. Hailey; Salim Abdali; Finn Erland Christensen; William W. Craig; Todd R. Decker; Fiona A. Harrison; Mario A. Jimenez-Garate
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Paper Abstract

The high energy focusing telescope (HEFT) is a balloon-borne system for obtaining arcminute imagery in the 20 - 100 keV energy band. The hard x-ray optics are baselined to use thin epoxy-replicated aluminum foil substrates coated with graded-d multilayers, and we show some results on x-ray performance of prototype foil substrates. We also propose an extremely promising alternative substrate -- thermally formed glass. The advantages of thermally formed glass substrates, their fabrication and preliminary metrology on sample pieces are discussed. If ultimately feasible, the thermally formed glass is a better substrate due to its superior hard x-ray reflectivity and scattering properties in comparison to similarly coated epoxy-replicated aluminum foil. We also discuss some preliminary work on the HEFT mirror mounting concept and the associated angular resolution error budget.

Paper Details

Date Published: 15 October 1997
PDF: 9 pages
Proc. SPIE 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, (15 October 1997); doi: 10.1117/12.278902
Show Author Affiliations
Charles J. Hailey, Columbia Univ. (United States)
Salim Abdali, Danish Space Research Institute (Denmark)
Finn Erland Christensen, Danish Space Research Institute (Denmark)
William W. Craig, Columbia Univ. (United States)
Todd R. Decker, Columbia Univ. (United States)
Fiona A. Harrison, California Institute of Technology (United States)
Mario A. Jimenez-Garate, Columbia Univ. (United States)

Published in SPIE Proceedings Vol. 3114:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII
Oswald H. W. Siegmund; Mark A. Gummin, Editor(s)

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