Substrates and mounting techniques for the High-Energy Focusing Telescope (HEFT)

Charles J. Hailey; Salim Abdali; Finn Erland Christensen; William W. Craig; Todd R. Decker; Fiona A. Harrison; Mario A. Jimenez-Garate

doi:10.1117/12.278902

15 October 1997 Substrates and mounting techniques for the High-Energy Focusing Telescope (HEFT)

Charles J. Hailey, Salim Abdali, Finn Erland Christensen, William W. Craig, Todd R. Decker, Fiona A. Harrison, Mario A. Jimenez-Garate

Author Affiliations +

Proceedings Volume 3114, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII; (1997) https://doi.org/10.1117/12.278902
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Charles J. Hailey, Salim Abdali, Finn Erland Christensen, William W. Craig, Todd R. Decker, Fiona A. Harrison, and 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); https://doi.org/10.1117/12.278902

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