论文标题
通过部分连贯的X射线梁裁剪光束聚焦的修饰
Beam focus modifications by cropping partially coherent X-ray beams
论文作者
论文摘要
我们模拟在第四代存储环中发出的部分连通X射线梁的聚焦，该储存环的执行模式分解和波光学传播。焦点位置被移动，当入口狭缝作物横梁时，其尺寸会扩大。这是使用缝隙选择相干分数的通常情况。还分析了两个聚焦元素（镜子，镜头或转击器）的配对，以确保还分析了固定焦点位置。我们的结果表明，部分相干源的图像（在低阳性存储环中这样的不合用器）是用于控制相干分数的孔径的非平凡函数。
We simulate the focusing of a partially-coherent X-ray beam emitted by an undulator in a fourth-generation storage ring performing coherent mode decomposition and wave optics propagation. The focus position is shifted, and its size is enlarged when an entrance slit crops the beam. This is the usual case when a slit is used to select the coherent fraction. The pairing of two focusing elements (mirrors, lenses or transfocators) to ensure a fixed focal position is also analyzed. Our results show that the image of a partially coherent source, such an undulator in a low-emittance storage ring, is a non-trivial function of the aperture used to control the coherence fraction.
