Electron Jet Detected by MMS at Dipolarization Front

被引：79

作者：

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

Fu, H. S. ^{[1
]}

Vaivads, A. ^{[2
]}

Khotyaintsev, Y. V. ^{[2
]}

Gershman, D. J. ^{[3
]}

Hwang, K-J. ^{[4
]}

Chen, Z. Z. ^{[1
]}

Cao, D. ^{[1
]}

Xu, Y. ^{[1
]}

Yang, J. ^{[1
]}

Peng, F. Z. ^{[1
]}

Huang, S. Y. ^{[5
]}

Burch, J. L. ^{[4
]}

Giles, B. L. ^{[3
]}

Ergun, R. E. ^{[6
]}

Russell, C. T. ^{[7
]}

Lindqvist, P-A ^{[8
]}

Le Contel, O. ^{[9
]}

机构：

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

[2] Swedish Inst Space Phys, Uppsala, Sweden

[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[4] Southwest Res Inst, San Antonio, TX USA

[5] Wuhan Univ, Sch Elect & Informat, Wuhan, Hubei, Peoples R China

[6] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA

[7] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90024 USA

[8] KTH Royal Inst Technol, Stockholm, Sweden

[9] CNRS, LPP, Palaiseau, France

来源：

GEOPHYSICAL RESEARCH LETTERS | 2018年 / 45卷 / 02期

关键词：

electron jet; dipolarization front; electric field; LHD waves; electron current; energy conversion; ELECTROMAGNETIC ENERGY-CONVERSION; WAVE-PARTICLE INTERACTIONS; BURSTY BULK FLOWS; MAGNETIC RECONNECTION; PLASMA SHEET; ACCELERATION; MAGNETOTAIL; CLUSTER; SIMULATIONS; DISSIPATION;

D O I：

10.1002/2017GL076509

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Using MMS high-resolution measurements, we present the first observation of fast electron jet (V-e similar to 2,000 km/s) at a dipolarization front (DF) in the magnetotail plasma sheet. This jet, with scale comparable to the DF thickness (similar to 0.9 d(i)), is primarily in the tangential plane to the DF current sheet and mainly undergoes the E x B drift motion; it contributes significantly to the current system at the DF, including a localized ring-current that can modify the DF topology. Associated with this fast jet, we observed a persistent normal electric field, strong lower hybrid drift waves, and strong energy conversion at the DF. Such strong energy conversion is primarily attributed to the electron-jet-driven current (E.j(e) approximate to 2 E.j(i)), rather than the ion current suggested in previous studies.

引用

页码：556 / 564

页数：9

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