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Self-organized confinement by magnetic dipole: recent results from RT-1 and theoretical modeling

机译：磁偶极子的自组织约束：RT-1和理论模型的最新结果

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摘要

Inhomogeneous magnetic field gives rise to interesting properties of plasmas which are degenerate in homogeneous (or zero) magnetic fields. Magnetospheric plasmas, as observed commonly in the Universe, are the most simple, natural realization of strongly inhomogeneous structures created spontaneously in the vicinity of magnetic dipoles. The RT-1 device produces a 'laboratory magnetosphere' by which stable confinement (particle and energy confinement times ~0.5 s) of high-β (local electron β ~ 0.7; electron temperature ≧10 keV) plasma is achieved. By producing a pure-electron plasma, we obtain clear-cut evidence of inward (or up-hill) diffusion of particles. A statistical mechanical model reveals the 'distortion' of phase space, induced by the inhomogeneity of the ambient magnetic field, on which the plasma relaxes into an equilibrium with inhomogeneous density while it maximizes the entropy.
机译：不均匀的磁场引起等离子体的有趣特性，等离子体在均匀（或零）磁场中退化。在宇宙中普遍观察到的磁层等离子体是在磁偶极子附近自发产生的强烈非均质结构的最简单自然的实现。 RT-1装置产生一个“实验室磁层”，通过该实验室，可以实现高β（局部电子β〜0.7;电子温度≧10 keV）等离子体的稳定限制（粒子和能量限制时间〜0.5 s）。通过产生纯电子等离子体，我们获得了粒子向内（或上坡）扩散的清晰证据。一个统计力学模型揭示了由环境磁场的不均匀性引起的相空间的“扭曲”，等离子体在该磁场上以最大密度熵松弛，从而达到不均匀密度的平衡。

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