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Optical Engineering • Open Access

Long-term stability of Mg/SiC multilayers

Paper Abstract

Mg/SiC multilayers have been selected to coat the primary and secondary mirrors of the SCORE (Sounding-rocket CORonagraphic Experiment) telescope, a part of the NASA HERSCHEL program. Their experimental reflectance at the He II 30.4 nm wavelength is twice as much that of standard Mo/Si multilayer coatings, with a large improvement of the instrument effective area. Nevertheless, their long-term stability still needs to be evaluated in order to consider them as a valuable candidate for instrumentation of a long term space mission. A study is carried out on different Mg/SiC samples designed and fabricated varying the structural parameters and/or the capping layer material and thickness, which have been monitored for four years after deposition.

Paper Details

Date Published: 7 March 2012
PDF: 10 pages
Opt. Eng. 51(2) 023801 doi: 10.1117/1.OE.51.2.023801
Published in: Optical Engineering Volume 51, Issue 2
Show Author Affiliations
Maria-Guglielmina Pelizzo, CNR IFN LUXOR Lab. (Italy)
Alain Jody Corso, CNR IFN LUXOR Lab. (Italy)
Paola Zuppella, CNR IFN LUXOR Lab. (Italy)
Piergiorgio Nicolosi, CNR IFN LUXOR Lab. (Italy)
Silvano Fineschi, INAF - Osservatorio Astronomico di Torino (Italy)
John F. Seely, U.S. Naval Research Lab. (United States)
Benjawan Kjornrattanawanich, Brookhaven National Lab. (United States)
David L. Windt, Reflective X-Ray Optics LLC (United States)

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