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Investigation of substrates and mounting techniques for the High Energy Focusing Telescope (HEFT)

Hailey, Charles J. and Abdali, Salim and Christensen, Finn E. and Craig, William W. and Decker, Todd R. and Harrison, Fiona A. and Jimenez-Garate, Mario A. (1997) Investigation of substrates and mounting techniques for the High Energy Focusing Telescope (HEFT). In: EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII. Proceedings of SPIE. No.3114. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 535-543. ISBN 9780819425362.

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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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Christensen, Finn E.0000-0001-5679-1946
Harrison, Fiona A.0000-0003-2992-8024
Additional Information:© 1997 Society of Photo-Optical Instrumentation Engineers (SPIE). This work is Columbia Astrophysics Laboratory contribution number 642.
Group:Space Radiation Laboratory
Subject Keywords:X-ray optics, multilayers, thin foil optics
Series Name:Proceedings of SPIE
Issue or Number:3114
Record Number:CaltechAUTHORS:20180731-114053130
Persistent URL:
Official Citation:Charles J. Hailey, Salim Abdali, Finn Erland Christensen, William W. Craig, Todd R. Decker, Fiona A. Harrison, Mario A. Jimenez-Garate, "Substrates and mounting techniques for the High-Energy Focusing Telescope (HEFT)", Proc. SPIE 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII, (15 October 1997); doi: 10.1117/12.278902;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88385
Deposited By: George Porter
Deposited On:31 Jul 2018 20:07
Last Modified:16 Nov 2021 00:26

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