Ion and electron heating during magnetic reconnection in weakly collisional plasmas

被引：50

作者：

Numata, Ryusuke ^{[1
]}

Loureiro, N. F. ^{[2
]}

机构：

[1] Univ Hyogo, Grad Sch Simulat Studies, Chuo Ku, Kobe, Hyogo 6500047, Japan

[2] Univ Lisbon, Inst Super Tecn, Inst Plasmas & Fusao Nucl, P-1049001 Lisbon, Portugal

来源：

JOURNAL OF PLASMA PHYSICS | 2015年 / 81卷

关键词：

ASTROPHYSICAL GYROKINETICS; ACCELERATION;

D O I：

10.1017/S002237781400107X

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Magnetic reconnection and associated heating of ions and electrons in strongly magnetized, weakly collisional plasmas are studied by means of gyrokinetic simulations. It is shown that an appreciable amount of the released magnetic energy is dissipated to yield (irreversible) electron and ion heating via phase mixing. Electron heating is mostly localized to the magnetic island, not the current sheet, and occurs after the dynamical reconnection stage. Ion heating is comparable to electron heating only in high-beta plasmas, and results from both parallel and perpendicular phase mixing due to finite Larmor radius (FLR) effects; in space, ion heating is mostly localized to the interior of a secondary island (plasmoid) that arises from the instability of the current sheet.

引用

页数：17

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