We present the results of an experimental study of soft X-ray (SXR) and extreme ultraviolet emission spectra of the plasma produced by exposing a plane solid beryllium target to laser radiation with broad frequency and angular spectra. SXR lines up to 1s – 9p of Be IV as well as the plasma continuum are recorded for a laser focal-spot intensity of 5.3 × 10 13 W cm -2 . To model the SXR beryllium plasma spectra, simulations are carried out using the INDHAUS programme and the FLYCHK code in the framework of local thermodynamic equilibrium model, which agree nicely with experimentally obtained results.

中文翻译：

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钕玻璃激光辐射产生的铍等离子体的软X射线和EUV发射光谱，具有宽频率和角光谱

我们介绍了通过将平面固体铍靶材暴露于具有宽频率和角度光谱的激光辐射而产生的等离子体的软X射线（SXR）和极紫外发射光谱的实验研究结果。对于5.3×10 13 W cm -2的激光焦点强度，记录了高达1s – 9p的Be IV的SXR谱线以及等离子体连续谱。为了模拟SXR铍等离子体光谱，在局部热力学平衡模型的框架内使用INDHAUS程序和FLYCHK代码进行了模拟，与实验获得的结果非常吻合。