This Letter reports on investigations of novel, to the best of our knowledge, NiV(Ni₉₃V₇)/Ti multilayer mirrors for the operation in the wavelength region of 350–450 eV. Such mirrors are promising optical components for the Z-pinch plasma diagnostic. The NiV/Ti multilayers show superior structural and optical performance compared to conventional Ni/Ti multilayers. Replacing Ni with NiV in multilayers decreases interface widths and enhances the contrast of the refractive index between the absorber and spacer layers. The improvement of interface quality contributes to the enhancement in reflectance. Under the grazing incidence of 13°, a peak reflectivity of 25.1% at 429 eV is achieved for NiV/Ti multilayers, while 17.7% at 427 eV for Ni/Ti.

中文翻译：

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用于 350-450 eV 波长范围内 Z 箍缩等离子体诊断的 NiV/Ti 多层反射镜的结构和光学性能

据我们所知，这封信报道了在 350-450 eV 波长范围内工作的新型 NiV(Ni ₉₃ V ₇ )/Ti 多层反射镜的研究。这种镜子是用于 Z 箍缩等离子体诊断的有前景的光学元件。与传统的 Ni/Ti 多层膜相比，NiV/Ti 多层膜表现出优异的结构和光学性能。在多层中用 NiV 代替 Ni 可减小界面宽度并增强吸收层和间隔层之间的折射率对比度。界面质量的提高有助于反射率的提高。在 13° 掠入射角下，NiV/Ti 多层膜在 429 eV 处的峰值反射率为 25.1%，而 Ni/Ti 多层膜在 427 eV 处的峰值反射率为 17.7%。