SiC/Mg multilayer coatings for SCORE coronagraph: long term stability analysis

Maria Guglielmina Pelizzo; Silvano Fineschi; Paola Zuppella; Alain Jody Corso; David L. Windt; Piergiorgio Nicolosi

doi:10.1117/12.898223

6 October 2011 SiC/Mg multilayer coatings for SCORE coronagraph: long term stability analysis

Maria Guglielmina Pelizzo, Silvano Fineschi, Paola Zuppella, Alain Jody Corso, David L. Windt, Piergiorgio Nicolosi

Proceedings Volume 8148, Solar Physics and Space Weather Instrumentation IV; 81480M (2011) https://doi.org/10.1117/12.898223
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

SiC/Mg multilayers have been used as coatings of the Sounding-rocket CORonagraphic Experiment (SCORE) telescope mirrors launched during the NASA HERSCHEL program. This materials couple has been largely studied by researchers since it provides higher performances than a standard Mo/Si multilayer; the SCORE mirrors show in fact a peak reflectance of around 40% at HeII 30.4 nm. Nevertheless, long term stability of this coating is an open problem. A study on the aging and stability of this multilayer has been carried on. SiC/Mg multilayer samples characterized by different structural parameters have been deposited. They have been measured just after deposition and four years later to verify degradation based on natural aging. Experimental results and analysis are presented.

Citation Download Citation

Maria Guglielmina Pelizzo, Silvano Fineschi, Paola Zuppella, Alain Jody Corso, David L. Windt, and Piergiorgio Nicolosi "SiC/Mg multilayer coatings for SCORE coronagraph: long term stability analysis", Proc. SPIE 8148, Solar Physics and Space Weather Instrumentation IV, 81480M (6 October 2011); https://doi.org/10.1117/12.898223

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