Hydrodynamic simulation of XUV laser-produced plasmas
Hydrodynamic simulation of XUV laser-produced plasmas
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XUV 激光产生等离子体的流体动力学模拟
DOI：
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发表时间：
2004
期刊：
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通讯作者：
J. Gauthier
中科院分区：
文献类型：
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作者：
Marta Fajardo;Ph. Zeitoun;J. Gauthier
摘要：随着新型 XUV 源（例如 VUV FEL）的构建，XUV 激光与物质的相互作用将在超高强度下实现。但即使是 XUV 激光器或高谐波发生器等桌面设施，也开始达到足以产生密集等离子体的强度。通过一维流体动力学拉格朗日代码研究 XUV 激光与物质的相互作用，并针对一系列有趣的 XUV 源进行辐射传输。发现对于在 XUV 激光波长附近具有 L 边缘的 Z = 12-14 元件，加热非常不同。为了解释这种行为，研究了可能的吸收机制，并证明与冷致密物质的相互作用占主导地位。还研究了等离子体对 XUV 激光参数（如能量、脉冲持续时间和波长）的敏感性，涵盖了现有 XUV 激光的范围。我们发现可以使用台式激光器来研究 XUV 激光产生的等离子体，为未来的 VUV-FEL 高强度实验铺平了道路。
Abstract.With the construction of novel XUV sources, such as VUV FEL’s, XUV laser-matter interaction will become available at ultra-high intensities. But even tabletop facilities such as XUV lasers or High Harmonic Generation, are starting to reach intensities high enough to produce dense plasmas. XUV laser-matter interaction is studied by a 1D hydrodynamic Lagrangian code with radiative transfer for a range of interesting XUV sources. Heating is found to be very different for Z = 12-14 elements having L-edges around the XUV laser wavelength. Possible absorption mechanisms were investigated in order to explain this behaviour, and interaction with cold dense matter proved to be dominant. Plasma sensitivity to XUV laser parameters such as energy, pulse duration, and wavelength was also studied, covering ranges of existing XUV lasers. We found that XUV laser-produced plasmas could be studied using tabletop lasers, paving the way for future VUV-FEL high intensity experiments.