Investigation of 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

Research output: Contribution to journalConference articleResearchpeer-review

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. Ifultimately 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 epoxyreplicated aluminum foil. We also discuss some preliminary work on the HEFT mirror mounting concept and the associated angular resolution error budget.
Original languageEnglish
JournalProceedings of the SPIE - The International Society for Optical Engineering
Volume3114
Pages (from-to)535-543
ISSN0277-786X
DOIs
Publication statusPublished - 1997
EventEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII - San Diego, CA., United States
Duration: 27 Jul 199727 Jul 1997

Conference

ConferenceEUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy VIII
CountryUnited States
CitySan Diego, CA.
Period27/07/199727/07/1997

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