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Comparison of Mg-based multilayers for solar He II radiation at 30.4 nm wavelength

机译：镁基多层膜在30.4 nm波长下对太阳He II辐射的比较

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摘要

Mg-based multilayers, including SiC/Mg, Co/Mg, B_(4)C/Mg, and Si/Mg, are investigated for solar imaging and a He II calibration lamp at a 30.4 nm wavelength. These multilayers were fabricated by a magnetron sputtering method and characterized by x-ray reflection. The reflectivities of these multilayers were measured by synchrotron radiation. Near-normal-incidence reflectivities of Co/Mg and SiC/Mg multilayer mirrors are as high as 40.3percent and 44.6percent, respectively, while those of B4C/Mg and Si/Mg mirrors are too low for application. The measured results suggest that SiC/Mg, Co/Mg multilayers are promising for a 30.4nm wavelength.
机译：研究了基于镁的多层材料，包括SiC / Mg，Co / Mg，B_（4）C / Mg和Si / Mg，用于太阳能成像和波长为30.4 nm的He II校准灯。这些多层通过磁控溅射法制造，并通过X射线反射表征。这些多层的反射率通过同步加速器辐射测量。 Co / Mg和SiC / Mg多层反射镜的近法向入射反射率分别高达40.3％和44.6％，而B4C / Mg和Si / Mg反射镜的反射率太低而无法应用。测量结果表明，SiC / Mg，Co / Mg多层有望在30.4nm波长下发光。

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