Microinjections observed by MMS FEEPS in the dusk to midnight region

Fennell, Joseph F.; Turner, D. L.; Lemon, C. L.; Blake, J. B.; Clemmons, J. H.; Mauk, B. H.; Jaynes, A. N.; Cohen, I. J.; Westlake, J. H.; Baker, D. N.; Craft, J. V.; Spence, H. E.; Reeves, Geoffrey D.; Torbert, R. B.; Burch, J. L.; Giles, B. L.; Paterson, W. R.; Strangeway, R. J.

doi:10.1002/2016GL069207

Title: Microinjections observed by MMS FEEPS in the dusk to midnight region

Journal Article · Mon Jun 13 00:00:00 EDT 2016 · Geophysical Research Letters

DOI:https://doi.org/10.1002/2016GL069207· OSTI ID:1402658

Fennell, Joseph F. ^[1]; Turner, D. L. ^[1]; Lemon, C. L. ^[1]; Blake, J. B. ^[1]; Clemmons, J. H. ^[1]; Mauk, B. H. ^[2]; Jaynes, A. N. ^[3]; Cohen, I. J. ^[2]; Westlake, J. H. ^[2]; Baker, D. N. ^[3]; Craft, J. V. ^[3]; Spence, H. E. ^[4];

^[5]; Torbert, R. B. ^[4]; Burch, J. L. ^[6]; Giles, B. L. ^[7]; Paterson, W. R. ^[8]; Strangeway, R. J. ^[9]

The Aerospace Corporation, El Segundo, CA (United States)
The Johns Hopkins Univ. Applied Physics Lab., Laurel, MD (United States)
Univ. of Colorado, Boulder, CO (United States)
Univ. of New Hampshire, Durham, NH (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Southwest Research Institute, San Antonio, TX (United States)
Goddard Spaceflight Center, College Park, MD (United States)
Goddard Spaceflight Center, College Park, MD (United States); NASA Headquarters, Washington, D.C. (United States)
Univ. of California, Los Angeles, CA (United States)

Energetic electron injections are commonly observed in the premidnight to dawn regions in association with substorms. However, successive electron injections are generally separated in time by hours and are rarer in the dusk region of the inner magnetosphere. Early MMS energetic electron data taken in the dusk to premidnight regions above ~9 R_E show many clusters of electron injections. These injections of 50–400 keV electrons have energy dispersion signatures indicating that they gradient and curvature drifted from earlier local times. We focus on burst rate data starting near 21:00 UT on 6 August 2015. A cluster of ~40 electron injections occurred in the following 4 h interval. The highest-resolution data showed that the electrons in the injections were trapped and had bidirectional field-aligned angular distributions. Here, these injection clusters are a new phenomenon in this region of the magnetosphere.

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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:: 1402658

Report Number(s):: LA-UR-17-28043; TRN: US1702892

Journal Information:: Geophysical Research Letters, Vol. 43, Issue 12; ISSN 0094-8276

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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MMS/FEEPS Observations of Electron Microinjections Due to Kelvin-Helmholtz Waves and Flux Transfer Events: A Case Study Kavosi, S.; Spence, H. E.; Fennell, J. F. Journal of Geophysical Research: Space Physics, Vol. 123, Issue 7 https://doi.org/10.1029/2018ja025244	journal	July 2018

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Title: Microinjections observed by MMS FEEPS in the dusk to midnight region

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