How can slow plasma electron holes exist?,Physical Review E

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How can slow plasma electron holes exist?
Physical Review E ( IF 2.2 ) Pub Date : 2021-07-15 , DOI: 10.1103/physreve.104.015208
I H Hutchinson ₁

Affiliation

One-dimensional analysis is presented of solitary positive potential plasma structures whose velocity lies within the range of ion distribution velocities that are strongly populated: “slow” electron holes. It is shown that to avoid the self-acceleration of the hole velocity away from ion velocities it must lie within a local minimum in the ion velocity distribution. Quantitative criteria for the existence of stable equilibria are obtained. The background ion distributions required are generally stable to ion-ion modes unless the electron temperature is much higher than the ion temperature. Since slow positive potential solitons are shown not to be possible without a significant contribution from trapped electrons, it seems highly likely that such observed slow potential structures are indeed electron holes.

中文翻译：

慢等离子体电子空穴如何存在？

对孤立的正电位等离子体结构进行一维分析，其速度位于密集分布的离子分布速度范围内：“慢”电子空穴。结果表明，为了避免空穴速度远离离子速度的自加速，它必须位于离子速度分布的局部最小值内。获得了稳定平衡存在的定量标准。除非电子温度远高于离子温度，否则所需的背景离子分布对于离子-离子模式通常是稳定的。由于缓慢的正电位孤子被证明在没有俘获电子的显着贡献的情况下是不可能的，因此这种观察到的缓慢电位结构似乎很可能确实是电子空穴。

更新日期：2021-07-15

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