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A hybrid method for X-ray optics simulation: combining geometric ray-tracing and wavefront propagation

机译:X射线光学模拟的混合方法:结合几何射线跟踪和波前传播

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摘要

A new method for beamline simulation combining ray-tracing and wavefront propagation is described. The ‘Hybrid Method’ computes diffraction effects when the beam is clipped by an aperture or mirror length and can also simulate the effect of figure errors in the optical elements when diffraction is present. The effect of different spatial frequencies of figure errors on the image is compared with SHADOW results pointing to the limitations of the latter. The code has been benchmarked against the multi-electron version of SRW in one dimension to show its validity in the case of fully, partially and non-coherent beams. The results demonstrate that the code is considerably faster than the multi-electron version of SRW and is therefore a useful tool for beamline design and optimization.
机译:描述了一种结合射线追踪和波前传播的光束线模拟新方法。 “混合法”计算光束被孔径或反射镜长度限制时的衍射效应,当出现衍射时,还可以模拟光学元件中图形误差的影响。将图形错误的不同空间频率对图像的影响与SHADOW结果进行比较,指出后者的局限性。该规范已在一维中针对多电子版本的SRW进行了基准测试,以证明其在全,部分和非相干光束的情况下的有效性。结果表明,该代码比SRW的多电子版本要快得多,因此是光束线设计和优化的有用工具。

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