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时间分辨率的X射线光谱仪用于通过Z-pinch动态高空辐射进行不透明度研究

Daoyuan Zhang¹, Qiang Xu¹, HongChun Cai¹

¹Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China.

The Review of scientific instruments

|May 22, 2025

概括

在中国开发的一种新型X射线光谱仪测量了Z-pinch等离子体的不透明度. 该工具提供了对辐射加热的/铁等离子体条件的洞察,确定其温度和离子密度.

科学领域:

* 等离子体物理学
*X射线光谱学射线光谱学
* 材料科学材料科学

背景情况:

* Z-pinch动态洞穴空间实验需要先进的诊断工具.
* 密集等离子体中辐射驱动的不透明度的特征对于理解能量转移至关重要.

研究的目的:

*为Z-pinch实验引入一种新的时间分辨率X射线光谱仪.
* 用于测量辐射加热的Al/Fe混合等离子体的X射线吸收光谱.
* 确定等离子体参数,如温度和离子密度.

主要方法:

* 开发和使用一个新的时间分辨率X射线光谱仪,具有六镜像系统.
* 采用凸圆柱形KAP晶体进行X射线衍射和MCP探测器进行软X射线光谱成像.
* 门时间约为1.1 ns,以最大限度地减少来自Z-pinch辐射的背景噪音.

主要成果:

*成功获取了辐射加热的Al/Fe等离子体的时间解析和时间整合吸收X射线光谱.
* 实验性X射线传输数据与Al等离子体的理论计算相比较.
*对于Al/Fe等离子体,在~112 eV的等离子体温度和在1.1 × 10^21 cm^-3的离子密度的确定.

结论:

*开发的X射线光谱仪在Z-pinch动态洞穴中对不透明性实验有效.
* 该研究提供了关于辐射加热的Al/Fe等离子体物理条件的关键数据.
*这些发现有助于更好地了解高能量密度等离子体的不透明性.

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