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Fielding of a large gas cell for fine pressure control in collisionless shock laser plasma experiments

机译：碰撞冲击激光等离子体实验中对微压控制的大型气体电池的锻炼

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Introduction The collision of two plasmas with different properties is a scenario which has relevance to a wide range of contexts from astrophysical to laboratory plasmas. The expansion of a hot, dense plasma into a lower density background is of particular common interest as the growth of a range of nonlinear structures can be triggered including solitons and shocks as well as the formation of thin plasma shells of increased density at the interface of the two plasmas. These thin shell are prone to dynamic instabilities, such as Rayleigh-Taylor (RT), Richtmyer-Meshkov, Kelvin-Helmholtz and the thin shell instability (TSI). Previous experimental campaigns [1] [2] [3] have see indications of a number of these features forming and are of great interest for further experimental investigation. The indication from these experiments is that the formation of instabilities is highly susceptible to the experimental parameters such as laser energy and in particular, the pressure of the surrounding gas that is ionized to provide the low density background.
机译：引言具有不同性质的两个等离子体的碰撞是一种方案，其与来自天体物理到实验室等离子体的广泛背景有关的情景。热，致密等离子体的膨胀到较低密度背景是特别普遍的兴趣，因为可以触发一系列非线性结构的生长包括孤子和冲击以及在界面处形成薄等离子体壳的增加的密度增加两个等离子体。这些薄壳容易发生动态不稳定，如瑞利 - 泰勒（RT），Richtmyer-Meshkov，Kelvin-Helmholtz和薄壳不稳定（TSI）。以前的实验活动[1] [2] [3]有一些这些特征形成的迹象，对进一步的实验调查感兴趣。来自这些实验的指示是，不稳定性的形成高度易受激光能量的实验参数，尤其是电离的周围气体的压力，以提供低密度背景。

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