Experimental study demonstrates 56% reflection in beryllium-magnesium multilayer mirrors, indicating enhanced imaging capabilities for solar corona observations.
The He-II (λ=30.4 nm) emission line is one of the spectral channels chosen to study solar corona. This Letter reports on investigations of novel beryllium (Be)/magnesium multilayer coatings which, when incorporated beneath a protective bilayer of aluminium and Be, ensure particularly high-reflection coefficients of up to 56%, a spectral width of Δλ=1.6 nm (λ/Δλ≈20), and high temporal stability.
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Полковников et al. (2019) studied this question.
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