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在Z机器上使用球形曲的布拉格晶体进行X射线自我发射成像

E C Harding¹, G K Robertson¹, G S Dunham¹

¹Sandia National Laboratories, Albuquerque, New Mexico 87185, USA.

The Review of scientific instruments

|December 8, 2023

概括

一个使用曲晶体的新型X射线成像系统被开发用于磁化线性惯性聚变 (MagLIF) 实验. 这种诊断器达到18微米的分辨率,使得等离子体结构的详细成像.

科学领域:

等离子体物理学的物理学
射线光学X射线光学
核聚变能源研究研究

背景情况:

磁化线材惯性聚变 (MagLIF) 产生热,密集的等离子体,发射X射线.
精确的等离子体动态成像对于理解MagLIF性能至关重要.
现有的X射线诊断可能缺乏所需的分辨率或视野.

研究的目的:

为MagLIF目标实施和评估使用球形曲晶体的X射线成像方案.
为了实现高空间分辨率,对等离子体结构进行详细分析.
评估诊断器在等离子体柱内分辨辐射特征的能力.

主要方法:

使用球形曲的晶体光学来捕获MagLIF等离子体的X射线辐射.
在罗兰圆上使用限制光圈来定义狭窄的光谱范围 (<15 eV).
在最高分辨率配置中测量平均空间分辨率.

主要成果:

实现了平均18微米的空间分辨率.
成功成像了整个1厘米长的等离子体柱,具有高吞吐量和大视野.
在等离子体停滞柱内清晰分辨的辐射结构,包括分叉.

结论:

球形曲的晶体X射线成像仪有效用于诊断MagLIF等离子体.
获得的分辨率允许精确确定辐射等离子体大小和结构.
这一成功导致开发了一种用于光谱线辐射分析的双晶体配置.

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