Asymmetric Equilibrium Structures of Superthin Current Sheets: The Asymmetry of Plasma Sources

IF 1.1 4区 物理与天体物理 Q4 PHYSICS, FLUIDS & PLASMAS
O. O. Tsareva, H. V. Malova, V. Yu. Popov, L. M. Zelenyi
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Abstract

The influence of asymmetry of plasma sources on the structure and spatial localization of a superthin current sheet (STCS) supported by demagnetized electrons is studied using a self-consistent model. The simulation takes into account the presence of a single plasma source in the northern hemisphere, which makes the plasma flow asymmetric. It is demonstrated that the asymmetry of plasma sources results in a minor reduction in the current carried by demagnetized electrons on the Speiser orbits. In the process, an enhancement of the negative diamagnetic currents is observed at the source side. The STCS center shifts to the side opposite the source position to preserve the balance of the total pressure. A comparison of STCS characteristics formed by demagnetized and magnetized electron populations reveals that the sheet structure is more sensitive to asymmetry in the case of magnetized electrons.

Abstract Image

超薄电流片的不对称平衡结构:等离子体源的不对称
采用自一致模型研究了等离子体源的不对称性对退磁电子支撑的超薄电流片结构和空间局域化的影响。该模拟考虑了北半球单一等离子体源的存在,使得等离子体流动不对称。结果表明,等离子体源的不对称性导致斯佩塞轨道上退磁电子所携带的电流略有减少。在此过程中,在源侧观察到负抗磁电流的增强。STCS中心移向源位置对面一侧,保持总压平衡。对退磁和磁化电子居群形成的STCS特性的比较表明,在磁化电子的情况下,薄片结构对不对称性更敏感。
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来源期刊
Plasma Physics Reports
Plasma Physics Reports 物理-物理:流体与等离子体
CiteScore
1.90
自引率
36.40%
发文量
104
审稿时长
4-8 weeks
期刊介绍: Plasma Physics Reports is a peer reviewed journal devoted to plasma physics. The journal covers the following topics: high-temperature plasma physics related to the problem of controlled nuclear fusion based on magnetic and inertial confinement; physics of cosmic plasma, including magnetosphere plasma, sun and stellar plasma, etc.; gas discharge plasma and plasma generated by laser and particle beams. The journal also publishes papers on such related topics as plasma electronics, generation of radiation in plasma, and plasma diagnostics. As well as other original communications, the journal publishes topical reviews and conference proceedings.
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