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对于高重复率FELs的波浪前线保护X射线晶体单色器

Lin Zhang¹, Matthew Seaberg¹, Hasan Yavaş¹

¹Linac Coherent Light Source, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, CA 94025, USA.

Journal of synchrotron radiation

|June 15, 2023

概括

保持X射线自由电子激光束质量需要对光学进行严格的热变形控制. 结冷单色机的新方法显著减少高度误差,使精确的波面保存成为可能.

科学领域:

一致的X射线光学.
高亮度的光源是高亮度的光源.
材料科学用于光学.

背景情况:

连贯的X射线自由电子激光 (XFEL) 束需要卓越的X射线光学性能来保护波面.
斯特雷尔比率量化了所需的光学质量,为热变形设定了严格的标准.

研究的目的:

建立X射线光学,特别是晶体单色光学的热变形标准.
介绍一下在单色仪晶体中实现小于25比克米高度误差标准偏差的技术.

主要方法:

制定X射线光学的热变形标准.
实施晶体的冷冷却.
使用聚焦元件来抵消热变形.
使用冷却和优化冷却温度.

主要成果:

高度误差的标准偏差必须为镜子的亚纳米,而晶体单色仪的标准偏差必须为<25 pm.
每种所介绍的技术都能使热变形减少一个数量级.
证明了在LCLS-II-HE仪器上实现100W SASE FEL光束的标准.

结论:

具有先进的热管理技术的冷化晶体符合严格的X射线波纹保护要求.
开发的方法使高性能X射线光学能够用于先进的FEL应用.
波面传播模拟验证了这些技术对光束质量的有效性.

关键词:

FEL FEL 是一个很好的方法.斯特雷尔比率是什么意思的X射线光学.一个单色化器的水晶.热变形热变形热变形波浪前线保护波浪前线保护

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相关概念视频

X-ray Crystallography

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...