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Coating of the HEFT telescope mirrors: method and results

Jensen, Carsten P. and Madsen, Kristin K. and Chen, Hubert C. and Christensen, Finn E. and Ziegler, Eric (2003) Coating of the HEFT telescope mirrors: method and results. In: X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy. Proceedings of SPIE. No.4851. Society of Photo-Optical Instrumentation Engineers , Bellingham, WA, pp. 724-733. ISBN 9780819446305. http://resolver.caltech.edu/CaltechAUTHORS:20180109-151756474

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Abstract

We report on the coating of depth graded W/Si multilayers on the thermally slumped glass substrates for the HEFT flight telescopes. The coatings consists of several hundred bilayers in an optimized graded power law design with stringent requirements on uniformity and interfacial roughness. We present the details of the planar magnetron sputtering facility including the optimization of power, Ar pressure and collimating geometry which allows us to coat the several thousand mirror segments required for each telescope module on a time schedule consistent with the current HEFT balloon project as well as future hard X-ray satellite projects. Results are presented on the uniformity, interfacial roughness, and reflectivity and scatter at hard X-ray energies.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1117/12.461315DOIArticle
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/4851/1/Coating-of-the-HEFT-telescope-mirrors-method-and-results/10.1117/12.461315.fullPublisherArticle
ORCID:
AuthorORCID
Madsen, Kristin K.0000-0003-1252-4891
Christensen, Finn E.0000-0001-5679-1946
Additional Information:© 2003 Society of Photo-Optical Instrumentation Engineers (SPIE).
Group:Space Radiation Laboratory
Subject Keywords:X-ray multilayers, hard X-ray telescopes, planar magnetron sputtering
Record Number:CaltechAUTHORS:20180109-151756474
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20180109-151756474
Official Citation:Carsten P. Jensen, Kristin K. Madsen, Hubert C.M. Chen, Finn Erland Christensen, Eric Ziegler, "Coating of the HEFT telescope mirrors: method and results", Proc. SPIE 4851, X-Ray and Gamma-Ray Telescopes and Instruments for Astronomy, (11 March 2003); doi: 10.1117/12.461315; http://dx.doi.org/10.1117/12.461315
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84202
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:09 Jan 2018 23:25
Last Modified:09 Jan 2018 23:25

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