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在最佳的目标厚度和焦点条件下,来自激光制造的Au等离子体的水窗X射线辐射

Jiahao Wang¹, Maki Kishimoto¹, Tomoyuki Jozaki^1,2

¹Department of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashihiroshima 739-8527, Hiroshima, Japan.

Physical review. E

|July 19, 2023

概括

研究人员优化了来自黄金等离子体的水窗 (WW) X射线辐射的激光条件. 他们发现了最佳的目标厚度和激光点的位置,以有效地开发实验室规模的WWX射线源.

科学领域:

等离子体物理学的物理学
射线科学X射线科学X射线科学
激光与等离子体相互作用

背景情况:

开发实验室规模的水窗 (WW) X射线源对于显微镜和材料科学中的应用至关重要.
黄金 (Au) 血是产生2.3-4.4纳米范围的X射线的有希望的候选者.

研究的目的:

为了确定最佳的激光照射条件,有效的水窗 (WW) X射线发射从黄金等离子体.
为了建立一个紧的,实验室规模的WWX射线源的参数.

主要方法:

研究激光强度对黄金目标厚度的影响,以获得最佳的X射线产量.
将热蒸发和商业黄金目标之间的X射线转换效率进行比较.
分析相对于焦点的激光点位置对等离子体特征的影响.
使用辐射水力动力学模拟来了解底层物理.

主要成果:

对于10^13W/cm^2.2左右的激光强度,确定了1μm的最低黄金目标厚度.
与商业片相比,热蒸发的黄金目标显示出更高的WWX射线转换效率.
在特定激光能量 (240和650mJ) 的焦点前大约1mm发现了最佳的激光点位置.
辐射水力学模拟成功解释了观察到的最佳目标厚度和斑点大小效应.

结论:

已经建立了最佳的激光照射条件,包括目标厚度和激光点定位,以有效地从黄金等离子体产生WWX射线.
热蒸发的黄金目标为实验室规模的世界大战X射线源开发提供了卓越的性能.
这些发现为设计和建造用于科学研究的实用WWX射线源提供了基础.

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