V. N. Polkovnikov, N. I. Chkhalo, E. Meltchakov, F. Delmotte, S. Yu. Zuev, N. N. Salashchenko, M. V. Svechnikov, N. N. Tsybin, “Stable multilayer reflective coatings for <nobr>$\lambda$</nobr>(HeI) = 58.4 nm for the kortes solar telescope”, Pisma v Zhurnal Tekhnicheskoi Fiziki, 2019, Volume 45, Issue 3,Pages <nobr>26

This article is cited in 8 papers

Stable multilayer reflective coatings for $\lambda$(HeI) = 58.4 nm for the kortes solar telescope

V. N. Polkovnikov^a, N. I. Chkhalo^a, E. Meltchakov^b, F. Delmotte^b, S. Yu. Zuev^a, N. N. Salashchenko^a, M. V. Svechnikov^a, N. N. Tsybin^a

^a Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhnii Novgorod
^b Laboratoire Charles Fabry, Institut d’Optique Graduate School, CNRS, Université Paris-Saclay, Palaiseau Cedex, France

Abstract: Multilayer aluminum-based structures reflecting at $\lambda$(HeI) = 58.4 nm were studied. Spectral and angular dependences of the reflection coefficient of these coatings were determined using a laboratory reflectometer and at the ELETTRA and BESSY II synchrotrons. The optical characteristics of multilayer Ru/Al and Mo/Al mirrors with a protective MoSi$_2$ layer were found to be stable: the absolute change in the reflection coefficient within 18 months of storage in air was no larger than 1.5%. The peak near-normal reflection coefficient for Mo/Al mirrors at 58.4 nm was $R$ = 26.1% with FWHM $\Delta\lambda_0.5$ = 10 nm of the reflection curve.

Received: 04.05.2018

DOI: 10.21883/PJTF.2019.03.47268.17369