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首页> 外文期刊>Journal of synchrotron radiation >Aspherical lens shapes for focusing synchrotron beams
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Aspherical lens shapes for focusing synchrotron beams

机译:非球面透镜形状,用于聚焦同步加速器光束

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摘要

Aspherical surfaces required for focusing collimated and divergent synchrotron beams using a single refractive element (lens) are reviewed. The Cartesian oval, a lens shape that produces perfect point-to-point focusing for monochromatic radiation, is studied in the context of X-ray beamlines. Optical surfaces that approximate ideal shapes are compared. Results are supported by ray-tracing simulations. Elliptical lenses, rather than parabolic, are preferred for nano-focusing X-rays because of the higher peak and lower tails in the intensity distribution. Cartesian ovals will improve the gain when using high-demagnification lenses of high numerical aperture.
机译:回顾了使用单个折射元件(透镜)聚焦准直和发散的同步加速器光束所需的非球面表面。在X射线束线的背景下研究了笛卡尔椭圆形(一种透镜形状,可为单色辐射产生完美的点对点聚焦)。比较近似理想形状的光学表面。光线跟踪模拟支持结果。椭圆透镜,而不是抛物线形透镜,是纳米聚焦X射线的首选,因为强度分布的峰值和尾部较高。当使用高数值孔径的高倍率透镜时,笛卡尔椭圆形将提高增益。

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