论文标题
准轻巧，差异旋转，自由实验实验室等离子体的表征
Characterization of Quasi-Keplerian, Differentially Rotating, Free-Boundary Laboratory Plasmas
论文作者
论文摘要
我们提出了脉冲驱动的差异旋转等离子体实验的结果，该实验旨在模拟与天体物理磁盘和喷气机相关的物理学。在这些实验中，角动量是通过电流阵列z捏合的消融的RAM压力注入的。与先前的液态金属和血浆实验相反，旋转不是由边界力驱动的。轴向压力梯度向上发射旋转的等离子喷气机，该旋转等离子体由周围等离子体晕圈的RAM，热和磁压组合限制。喷气机具有亚音速旋转，最大旋转速度$ 23 \ pm 3 $ km/s。旋转速度配置文件是Quasi-Keplerian，带有正雷利判别$κ^2 \ propto r^{ - 2.8 \ pm0.8} $ rad $^2 $/s $^2 $。等离子体在实验时间范围内完成了$ 0.5-2 $的全旋转（$ \ sim 150 $ ns）。
We present results from pulsed-power driven differentially rotating plasma experiments designed to simulate physics relevant to astrophysical disks and jets. In these experiments, angular momentum is injected by the ram pressure of the ablation flows from a wire array Z pinch. In contrast to previous liquid metal and plasma experiments, rotation is not driven by boundary forces. Axial pressure gradients launch a rotating plasma jet upwards, which is confined by a combination of ram, thermal, and magnetic pressure of a surrounding plasma halo. The jet has subsonic rotation, with a maximum rotation velocity $23 \pm 3$ km/s. The rotational velocity profile is quasi-Keplerian with a positive Rayleigh discriminant $κ^2 \propto r^{-2.8\pm0.8}$ rad$^2$/s$^2$. The plasma completes $0.5 - 2$ full rotations in the experimental time frame ($\sim 150$ ns).
