两个磁化等离子体压力丝状结构之间的相互作用：漂移-阿尔文模与输运
Interactions Between Two Magnetized Plasma Pressure Filaments: Drift-Alfvén Modes and Transport
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中文总结 AI 辅助
实验研究磁化等离子体压力丝状结构间距对漂移-阿尔文模耦合与输运的影响，发现间距小于无碰撞趋肤深度时发生强耦合与电荷能量转移。
中文摘要 AI 辅助
在一个大型线性磁化等离子体装置中，开展了一组关于邻近局域化磁化等离子体压力丝状结构合并动力学的实验。采用双丝状结构配置以确定横向相互作用的分离尺度。对离子饱和电流的涨落分析证实了每个丝状结构上存在不稳定的漂移-阿尔文模，这些模式主要由陡峭的电子温度梯度驱动。当丝状结构间距约为单个丝状结构尺寸的五倍或更大时，未观察到相互作用，漂移-阿尔文模保持非耦合状态。当它们靠得更近时，会发生显著更强的相互作用，伴随电荷和能量的转移，从而产生丝间电场。这导致丝状结构旋转并影响合并动力学。当丝状结构被不对称加热时，较冷的丝状结构会缠绕在另一个周围，漂移-阿尔文模在全球模式结构中完全耦合。丝状结构之间的输运可通过E×B漂移和丝状结构的局域势阱来解释，当丝状结构间距达到无碰撞趋肤深度范围内时，发生漂移-阿尔文模耦合。
英文摘要
A set of experiments on merging dynamics of localized magnetized plasma pressure filaments in close proximity has been carried out in a large linear magnetized plasma device. A two filament configuration is used to determine the separation scale of cross-field interaction. Fluctuation analysis of the ion saturation current confirms the presence of unstable drift-Alfvén modes on each filament which are predominantly driven by the steep electron temperature gradient. When the filaments are separated a distance of approximately five times the size of a single filament or greater, no interaction is observed and the drift-Alfvén modes remain uncoupled. When brought closer together, significantly stronger interaction occurs with transfer of charge and energy, leading to the generation of inter-filament electric fields. This has the effect of rotating the filaments and influencing the merging dynamics. When the filaments are asymmetrically heated, the cooler filament becomes wrapped around the other, and the drift-Alfvén modes become fully coupled in a global mode structure. Transport between the filaments is explained in terms of E x B drift and the local potential wells of the filaments, and drift-Alfvén mode coupling occurs when the filaments are brought within the distance of a collisionless skin depth.
发表机构
- University of Alberta（阿尔伯塔大学）
- General Atomics（通用原子能公司）
机构由 AI 辅助整理，请以论文原文为准。
