Coexistence of Plasmoid and Kelvin–Helmholtz Instabilities in Collisionless Plasma Turbulence

Coexistence of Plasmoid and Kelvin–Helmholtz Instabilities in Collisionless Plasma Turbulence
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无碰撞等离子体湍流中等离子体团和开尔文-亥姆霍兹不稳定性的共存

DOI:
10.3847/1538-4357/ac582f
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发表时间:
2022
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
L. Comisso
L. Comisso
中科院分区:
--
文献类型:
--
作者:
D. Borgogno;D. Grasso;Beatrice Achilli;M. Romé;L. Comisso

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本文分析了在无碰撞等离子体中,由于电子惯性的驱动,湍流中的磁重联可能发生。我们发现一个复杂的情况下,由于存在强大的速度剪切,典型的等离子体形成,观察到的影响的能量级联的磁流体动力学背景下,必须共存的开尔文-亥姆霍兹(KH)不稳定性。我们发现,电流密度层可能经历等离子体团或KH不稳定性依赖于当地的磁场和速度场的值。这些不稳定性之间的竞争不仅会影响电流片的演化,这可能会产生等离子体链或KH驱动的涡旋,而且还会影响能量级联,这对于磁谱和动力学谱是不同的。
The plasmoid formation in collisionless plasmas, where magnetic reconnection within turbulence may take place driven by the electron inertia, is analyzed. We find a complex situation in which, due to the presence of strong velocity shears, the typical plasmoid formation, observed to influence the energy cascade in the magnetohydrodynamic context, has to coexist with the Kelvin–Helmholtz (KH) instability. We find that the current density layers may undergo the plasmoid or the KH instability depending on the local values of the magnetic and velocity fields. The competition among these instabilities affects not only the evolution of the current sheets, that may generate plasmoid chains or KH-driven vortices, but also the energy cascade, that is different for the magnetic and kinetic spectra.
DOI: 10.3847/1538-4357/ab4c33
发表时间: 2019-09
期刊: The Astrophysical Journal
影响因子: --
作者:
L. Comisso;L. Sironi
通讯作者: L. Comisso;L. Sironi
DOI: 10.3847/2041-8213/ab93dc
发表时间: 2020-04
期刊: The Astrophysical Journal Letters
影响因子: --
作者:
L. Comisso;E. Sobacchi;L. Sironi
通讯作者: L. Comisso;E. Sobacchi;L. Sironi
与等离子体不稳定性介导的当前片层破坏相关的缩放
DOI: 10.1063/1.5110332
发表时间: 2019
期刊: Physics of Plasmas
影响因子: 2.2
作者:
Huang, Yi-Min;Comisso, Luca;Bhattacharjee, Amitava
通讯作者: Bhattacharjee, Amitava