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开发和表征一个激光门,高分辨率的X射线放射学平台,用于高能量密度的实验,使用 toroidally曲晶体

T Ebert¹, G N Hall¹, A Do¹

¹Lawrence Livermore National Laboratory, Livermore, California 94550, USA.

The Review of scientific instruments

|April 7, 2025

概括

圆形晶体通过减少纹性来提高高能量密度 (HED) 物体的X射线成像分辨率. 一个新的激光射线图像平台实现了10微米以下的分辨率,时间分辨率为110 psi.

科学领域:

高能量密度 (HED) 物理学
在X射线成像和诊断方面.
血物理学的等离子体物理学

背景情况:

曲晶体X射线成像仪对于通过二维X射线放射来研究HED物体至关重要.
球形晶体限制了空间分辨率,因为有着纹.
状晶体提供了一种解决方案,可以减少白并增强分辨率.

研究的目的:

在国家点火设施 (NIF) 开发和描述一个激光门的X射线放射学平台.
使用 toroidal 晶体来提高 HED 对象成像中的空间分辨率.
为了验证减少的纹,并评估平台的性能.

主要方法:

开发一个使用 toroidal 晶体的激光门的 X 射线放射系统.
由X射线源确定的空间和时间概况的表征.
实现一种新的多平面网格,用于测量场深,对齐验证和源大小估计.

主要成果:

证明了10微米以下的空间分辨率.
实现了0.9毫米的深度.
获得时间分辨率为110 ps.
成功验证了降低白和平台功能.

结论:

状晶体X射线放射学平台显著提高了HED研究的空间分辨率.
新的多平面网格方法在一次拍摄中提供了全面的诊断信息.
该平台能够对HED现象进行高分辨率,时间分辨率的成像.

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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...