Microinjections observed by MMS FEEPS in the dusk to midnight region
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 ~9 RE 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.
- Authors:
-
- 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)
- Publication Date:
- Research Org.:
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- National Aeronautics and Space Administration (NASA); USDOE
- OSTI Identifier:
- 1402658
- Report Number(s):
- LA-UR-17-28043
Journal ID: ISSN 0094-8276; TRN: US1702892
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Geophysical Research Letters
- Additional Journal Information:
- Journal Volume: 43; Journal Issue: 12; Journal ID: ISSN 0094-8276
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Heliospheric and Magnetospheric Physics; electron microinjections; electron energization; duskside plasma sheet; MMS
Citation Formats
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., and Strangeway, R. J. Microinjections observed by MMS FEEPS in the dusk to midnight region. United States: N. p., 2016.
Web. doi:10.1002/2016GL069207.
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. Microinjections observed by MMS FEEPS in the dusk to midnight region. United States. https://doi.org/10.1002/2016GL069207
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., and Strangeway, R. J. Mon .
"Microinjections observed by MMS FEEPS in the dusk to midnight region". United States. https://doi.org/10.1002/2016GL069207. https://www.osti.gov/servlets/purl/1402658.
@article{osti_1402658,
title = {Microinjections observed by MMS FEEPS in the dusk to midnight region},
author = {Fennell, Joseph F. and Turner, D. L. and Lemon, C. L. and Blake, J. B. and Clemmons, J. H. and Mauk, B. H. and Jaynes, A. N. and Cohen, I. J. and Westlake, J. H. and Baker, D. N. and Craft, J. V. and Spence, H. E. and Reeves, Geoffrey D. and Torbert, R. B. and Burch, J. L. and Giles, B. L. and Paterson, W. R. and Strangeway, R. J.},
abstractNote = {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 RE 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.},
doi = {10.1002/2016GL069207},
journal = {Geophysical Research Letters},
number = 12,
volume = 43,
place = {United States},
year = {Mon Jun 13 00:00:00 EDT 2016},
month = {Mon Jun 13 00:00:00 EDT 2016}
}
Web of Science
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Works referencing / citing this record:
MMS/FEEPS Observations of Electron Microinjections Due to Kelvin-Helmholtz Waves and Flux Transfer Events: A Case Study
journal, July 2018
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