Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics
Characterization of laser-produced carbon plasmas relevant to laboratory astrophysics
复制标题
与实验室天体物理学相关的激光产生的碳等离子体的表征
DOI：
10.1063/1.4959148
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发表时间：
2016
影响因子：
3.2
通讯作者：
C. Niemann
中科院分区：
文献类型：
--
作者：
D. Schaeffer;A. Bondarenko;E. Everson;S. E. Clark;C. Constantin;C. Niemann
实验，分析模型和数值模拟提出了表征碳等离子体产生的高强度（109−1013 W cm−2）激光相关的实验实验室天体物理学。在大尺度极限下，结果与自相似等熵绝热流体模型吻合较好。而激光靶模拟显示，不同离子种类的速度分布呈现小尺度结构，这在实验中也可以看到。这些分布表明，等离子体能量大部分处于中等电荷态（C+ 3-C +4），质量大部分处于最低电荷态，最高电荷态运动最快。
Experiments, analytic modeling, and numerical simulations are presented to characterize carbon plasmas produced by high-intensity ( 109−1013 W cm−2) lasers relevant to experimental laboratory astrophysics. In the large-scale limit, the results agree well with a self-similar isentropic, adiabatic fluid model. Laser-target simulations, however, show small-scale structure in the velocity distribution of different ion species, which is also seen in experiments. These distributions indicate that most of the plasma energy resides in moderate charge states (C+3–C+4), most of the mass resides in the lowest charge states, and the highest charge states move fastest.