Energetic electron acceleration observed by MMS in the vicinity of an X-line crossing

Jaynes, A. N.; Turner, D. L.; Wilder, F. D.; Osmane, A.; Baker, D. N.; Blake, J. B.; Fennell, J. F.; Cohen, I. J.; Mauk, B. H.; Reeves, G. D.; Ergun, R. E.; Giles, B. L.; Gershman, D. J.; Torbert, R. B.; Burch, J. L.

doi:10.1002/2016GL069206

Title: Energetic electron acceleration observed by MMS in the vicinity of an X-line crossing

Journal Article · Mon Jul 25 00:00:00 EDT 2016 · Geophysical Research Letters

DOI:https://doi.org/10.1002/2016GL069206· OSTI ID:1402635

Jaynes, A. N. ^[1]; Turner, D. L. ^[2]; Wilder, F. D. ^[1]; Osmane, A. ^[3]; Baker, D. N. ^[1]; Blake, J. B. ^[2]; Fennell, J. F. ^[2]; Cohen, I. J. ^[4]; Mauk, B. H. ^[4];

^[5]; Ergun, R. E. ^[1]; Giles, B. L. ^[6]; Gershman, D. J. ^[6]; Torbert, R. B. ^[7]; Burch, J. L. ^[8]

Univ. of Colorado, Boulder, CO (United States)
The Aerospace Corporation, El Segundo, CA (United States)
Aalto Univ., Otaniemi (Finland)
The Johns Hopkins University Applied Physics Lab., Laurel, MD (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
Univ. of New Hampshire, Durham, NH (United States)
Southwest Research Inst. (SwRI), San Antonio, TX (United States)

During the first months of observations, the Magnetospheric Multiscale Fly's Eye Energetic Particle Spectrometer instrument has observed several instances of electron acceleration up to >100 keV while in the vicinity of the dayside reconnection region. While particle acceleration associated with magnetic reconnection has been seen to occur up to these energies in the tail region, it had not yet been reported at the magnetopause. This study reports on observations of electron acceleration up to hundreds of keV that were recorded on 19 September 2015 around 1000 UT, in the midst of an X-line crossing. In the region surrounding the X-line, whistler-mode and broadband electrostatic waves were observed simultaneously with the appearance of highly energetic electrons which exhibited significant energization in the perpendicular direction. The mechanisms by which particles may be accelerated via reconnection-related processes are intrinsic to understanding particle dynamics among a wide range of spatial scales and plasma environments.

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Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: National Aeronautics and Space Administration (NASA); USDOE

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1402635

Report Number(s):: LA-UR-17-24824; TRN: US1702885

Journal Information:: Geophysical Research Letters, Vol. 43, Issue 14; ISSN 0094-8276

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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References (32)

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Large-Amplitude High-Frequency Waves at Earth's Magnetopause Graham, D. B.; Vaivads, A.; Khotyaintsev, Yu. V. Journal of Geophysical Research: Space Physics, Vol. 123, Issue 4 https://doi.org/10.1002/2017ja025034	journal	April 2018
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Evidence of Electron Acceleration at a Reconnecting Magnetopause Fu, H. S.; Peng, F. Z.; Liu, C. M. Geophysical Research Letters, Vol. 46, Issue 11 https://doi.org/10.1029/2019gl083032	journal	June 2019

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