Microinjections observed by MMS FEEPS in the dusk to midnight region

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

doi:10.1002/2016GL069207

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Microinjections observed by MMS FEEPS in the dusk to midnight region

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Microinjections observed by MMS FEEPS in the dusk to midnight region

J. F. Fennell, D. L. Turner, C. L. Lemon, J. B. Blake, J. H. Clemmons, B. H. Mauk, A. N. Jaynes, I. J. Cohen, J. H. Westlake, D. N. Baker, …

Geophysical research letters, Vol.43(12), pp.6078-6086

06/28/2016

DOI: 10.1002/2016GL069207

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Abstract

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 similar to 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 similar to 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. These injection clusters are a new phenomenon in this region of the magnetosphere.

Geology

Physical Sciences

Geosciences, Multidisciplinary

Science & Technology

Details

Title: Subtitle: Microinjections observed by MMS FEEPS in the dusk to midnight region
Creators: J. F. Fennell - The Aerospace Corporation
D. L. Turner - The Aerospace Corporation
C. L. Lemon - The Aerospace Corporation
J. B. Blake - The Aerospace Corporation
J. H. Clemmons - The Aerospace Corporation
B. H. Mauk - Johns Hopkins University Applied Physics Laboratory
A. N. Jaynes - Laboratory for Atmospheric and Space Physics
I. J. Cohen - Johns Hopkins University Applied Physics Laboratory
J. H. Westlake - Johns Hopkins University Applied Physics Laboratory
D. N. Baker - University of Colorado Boulder
J. V. Craft - Laboratory for Atmospheric and Space Physics
H. E. Spence - University of New Hampshire
G. D. Reeves - Los Alamos National Laboratory
R. B. Torbert - University of New Hampshire
J. L. Burch - Southwest Research Institute
B. L. Giles - Goddard Spaceflight Ctr, College Pk, MD USA
W. R. Paterson - Goddard Space Flight Center
R. J. Strangeway - University of California, Los Angeles
Resource Type: Journal article
Publication Details: Geophysical research letters, Vol.43(12), pp.6078-6086
DOI: 10.1002/2016GL069207
ISSN: 0094-8276
eISSN: 1944-8007
Publisher: Amer Geophysical Union
Number of pages: 9
Grant note: 792084 N/E99017JD / Southwest Research Institute NNX14AF35G; 967399; NAS5-01072 / NASA; National Aeronautics & Space Administration (NASA)
Language: English
Date published: 06/28/2016
Academic Unit: Physics and Astronomy; University College Courses
Record Identifier: 9984428805102771

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