Conversion of Magnetic Energy to Plasma Kinetic Energy During Guide Field Magnetic Reconnection in the Laboratory

被引：4

作者：

Bose, Sayak ^{[1
]}

Fox, William ^{[1
,2
]}

Ji, Hantao ^{[1
,2
]}

Yoo, Jongsoo ^{[1
]}

Goodman, Aaron ^{[3
]}

Alt, Andrew ^{[2
]}

Yamada, Masaaki ^{[1
]}

机构：

[1] Princeton Plasma Phys Lab, Princeton, NJ 08540 USA

[2] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08540 USA

[3] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08540 USA

来源：

PHYSICAL REVIEW LETTERS | 2024年 / 132卷 / 20期

关键词：

SOLAR-FLARES; RESISTIVITY;

D O I：

10.1103/PhysRevLett.132.205102

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present laboratory measurements showing the two-dimensional (2D) structure of energy conversion during magnetic reconnection with a guide field over the electron and ion diffusion regions, resolving the separate energy deposition on electrons and ions. We find that the electrons are energized by the parallel electric field at two locations, at the X line and around the separatrices. On the other hand, the ions are energized ballistically by the perpendicular electric field in the vicinity of the high-density separatrices. An energy balance calculation by evaluating the terms of the Poynting theorem shows that 40% of the magnetic energy is converted to particle energy, 2/3 of which is transferred to ions and 1/3 to electrons. Further analysis suggests that the energy deposited on particles manifests mostly in the form of thermal kinetic energy in the diffusion regions.

引用

页数：6

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