We report a straightforward beam splitter in the soft x-ray spectral range using a thin oxidized aluminum foil. As it allows us to monitor reliably shot-to-shot variations in energy and in energy distribution, this beam splitter is of high interest for the simultaneous use of diagnostics for soft x-rays sources. We measure a transmission of 0.5 and a reflectivity of 0.018 at 22.5° of incidence with a soft x-ray laser working at 32.8 nm. These values are in good agreement with the theory. As the theory predicts a reflectivity and a transmission of both 12% at 52.5° of incidence for 32.8 nm, it can also be useful for experiments that require the division and recombination of a beam, for instance, interferometry or pump-probe technique with an intense soft x-ray source.

中文翻译：

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使用铝箔监测软 X 射线源的逐次变化

我们报告了使用薄氧化铝箔在软 x 射线光谱范围内的直接分束器。由于它使我们能够可靠地监测能量和能量分布的逐次变化，因此该分束器对于同时使用软 X 射线源的诊断具有重要意义。我们使用工作在 32.8 nm 的软 X 射线激光器在 22.5° 的入射角下测量了 0.5 的透射率和 0.018 的反射率。这些值与理论非常吻合。由于该理论预测在 32.8 nm 的入射角为 52.5° 时反射率和透射率均为 12%，因此它也可用于需要光束分割和重组的实验，例如，干涉测量或泵浦探测技术与强烈的软 X 射线源。