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arXiv 1609.09508physics.plasm-ph
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反平行对称重联扩散区的两阶段体电子加热

Two-Stage Bulk Electron Heating in the Diffusion Region of Anti-Parallel Symmetric Reconnection

Ari Le, Jan Egedal, William Daughton

摘要:

反平行对称重联过程中扩散区的电子体重联需要两个阶段。首先,流入的电子被双极平行电场捕获并激发。接下来,电子在经历曲折运动时从重联电场获得能量。这些无碰撞机制已经在前面描述过了,它们导致了高度结构化的电子速度分布。尽管如此,一个简化的控制体积分析提供了估计如何与上游等离子体条件的净有效加热尺度与完全动力学模拟和航天器观测。

英文摘要:

Electron bulk energization in the diffusion region during anti-parallel symmetric reconnection entails two stages. First, the inflowing electrons are adiabatically trapped and energized by an ambipolar parallel electric field. Next, the electrons gain energy from the reconnection electric field as they undergo meandering motion. These collisionless mechanisms have been decribed previously, and they lead to highly-structured electron velocity distributions. Nevertheless, a simplified control-volume analysis gives estimates for how the net effective heating scales with the upstream plasma conditions in agreement with fully kinetic simulations and spacecraft observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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