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首页> 外文期刊>Japanese journal of applied physics.Part 1.Regular papers & short notes >Tandem-Phase Zone-Plate Optics for High-Energy X-ray Focusing
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Tandem-Phase Zone-Plate Optics for High-Energy X-ray Focusing

机译：用于高能X射线聚焦的串联相带板光学

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摘要

An optical system consisting of two phase zone plates closely arranged in tandem was constructed for focusing high-energy X-rays. The phase zone plates were made from tantalum and their combined thickness was 4.8μm. An ideal diffraction efficiency of 30% is expected at 30 keV, which is about 3 times higher than that of a single zone plate. The focusing properties at 30 keV were studied both numerically and experimentally. The coaxial tandem arrangement was precisely achieved by observing Young's interference patterns in the far-field produced by the two point foci. A focus size of ～4μm was obtained. The photon flux density was 2.2 × 10~13 photons/s/mm~2, which is 2.4 and 85 times higher than that obtained with a single zone plate and without focusing, respectively. The focused beam was used for scanning X-ray fluorescence microscopy and the residual tin distribution on a float glass surface was imaged.
机译：构造了一个光学系统，该系统由紧密排列的两个相位波带片构成，用于聚焦高能X射线。相区板由钽制成，其总厚度为4.8μm。在30 keV时，理想的衍射效率有望达到30％，这是单区板的约3倍。数值和实验研究了在30 keV时的聚焦特性。通过观察由两点焦点产生的远场中的杨氏干涉图，可以精确地实现同轴串联布置。焦点尺寸为〜4μm。光子通量密度为2.2×10〜13光子/ s / mm〜2，分别是单区板和不聚焦时的2.4和85倍。聚焦的光束用于扫描X射线荧光显微镜，并对浮法玻璃表面上的残留锡分布成像。

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