Extended Energy Conversion and Electron Acceleration Behind Dipolarization Front

被引：1

作者：

Xing, X. N. ^{[1
,2
]}

Liu, C. M. ^{[1
,2
]}

Liu, Y. Y. ^{[1
,2
]}

Zhao, B. N. ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Space & Environm, Beijing, Peoples R China

[2] Minist Ind & Informat Technol, Key Lab Space Environm Monitoring & Informat Proc, Beijing, Peoples R China

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2024年 / 129卷 / 07期

基金：

中国国家自然科学基金;

关键词：

dipolarization front; energy conversion; electron acceleration; BURSTY BULK FLOWS; KINETIC-ANALYSIS; PLASMA; TRANSPORT; IONS;

D O I：

10.1029/2024JA032810

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Energy transfer and transport in the terrestrial magnetotails are primarily driven by dipolarization fronts (DFs) embedded inside plasma jets. The DF-driven energy transfer has hitherto been believed to occur locally at the fronts. Different from the traditional knowledge, here we present the first observation of persistent energy conversion extended far behind a DF. The persistent energy conversion, which was dominated by energy loads and mainly contributed by electron currents, developed inside a turbulent, decaying flux pileup region (FPR), nearly 10 dDF (DF's thickness) behind the DF. The energy transfer chain may be initiated by interaction between the ion flow and ambient plasmas and closed by electron dynamics, leading to electron acceleration perpendicular to magnetic field. These results highlight that electron physics in turbulent FPRs plays a crucial role in the energy transport in the planetary magnetospheres. Persistent energy conversion extended far (similar to 10 dDF) behind a dipolarization front is presented The persistent energy conversion was developed inside a decaying flux pileup region and driven by electron currents The persistent energy conversion was related to electron acceleration perpendicular to local magnetic field

引用

页数：9

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