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由于在放牧出口处的不对称晶体反射增加了空间连贯度长度

Albert Macrander¹, Xianbo Shi¹, Walan Grizzoli¹

¹Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA.

Journal of synchrotron radiation

|March 26, 2024

概括

研究人员使用不对称的晶体反射将X射线束的空间连贯长度 (SCL) 增加了76%. 这种增强对于改善同步源的连贯X射线成像至关重要.

科学领域:

* 同步子辐射科学
* 一致的X射线成像
* 光学和光束操纵

背景情况:

* 连贯的X射线成像依赖于足够的空间连贯长度 (SCL) 和视野.
* 在同步光子中的标准双晶单色仪 (DCM) 常常限制可实现的SCL.
*增加SCL对于推进连贯衍射成像技术至关重要.

研究的目的:

* 调查增强来自DCM的X射线束空间连贯长度 (SCL) 的方法.
*为了评估一个使用非对称晶体衍射来改善SCL的实验安排.
*将这种方法的有效性与其他SCL增强策略进行比较.

主要方法:

*使用塔尔博特干扰度测量SCL.
* 采用光线追踪模拟用于四反射光学设置.
* 调查了DCM之后在放牧出口的不对称晶体反射.

主要成果:

* 在SCL中获得了76%的收益,与离开DCM的光束相比.
*观察到流量密度减少了20倍,这对于同步子来说是可以接受的.
*模拟显示,当在放牧发生率上使用不对称晶体时,SCL显著减少.

结论:

*在放牧出口处的一种不对称的晶体反射有效地增强了SCL,用于连贯的X射线成像.
* 降低流量密度的权衡在同步机设备上是可以管理的.
* 这种方法为SCL改善提供了对光束聚焦或延长真空传播的可行替代方案.

关键词:

一个X射线晶体不对称的 difraktion.放牧场的出口是放牧场的出口.空间连贯度长度空间连贯度长度

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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...