Van Allen Probes observations of structured whistler mode activity and coincident electron Landau acceleration inside a remnant plasmaspheric plume

Woodroffe, J. R.; Jordanova, V. K.; Funsten, H. O.; Streltsov, A. V.; Bengtson, M. T.; Kletzing, C. A.; Wygant, J. R.; Thaller, S. A.; Breneman, A. W.

doi:10.1002/2015JA022219

Title: Van Allen Probes observations of structured whistler mode activity and coincident electron Landau acceleration inside a remnant plasmaspheric plume

Journal Article · Sat Feb 25 00:00:00 EST 2017 · Journal of Geophysical Research. Space Physics

DOI:https://doi.org/10.1002/2015JA022219· OSTI ID:1558218

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Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Embry-Riddle Aeronautical Univ., Daytona Beach, FL (United States)
Univ. of Iowa, Iowa City, IA (United States)
Univ. of Minnesota, Minneapolis, MN (United States)

Abstract We present observations from the Van Allen Probes spacecraft that identify a region of intense whistler mode activity within a large density enhancement outside of the plasmasphere. We speculate that this density enhancement is part of a remnant plasmaspheric plume, with the observed wave being driven by a weakly anisotropic electron injection that drifted into the plume and became nonlinearly unstable to whistler emission. Particle measurements indicate that a significant fraction of thermal (<100 eV) electrons within the plume were subject to Landau acceleration by these waves, an effect that is naturally explained by whistler emission within a gradient and high‐density ducting inside a density enhancement.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: 89233218CNA000001

OSTI ID:: 1558218

Alternate ID(s):: OSTI ID: 1402330

Report Number(s):: LA-UR-19-20000

Journal Information:: Journal of Geophysical Research. Space Physics, Vol. 122, Issue 3; ISSN 2169-9380

Publisher:: American Geophysical UnionCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 16 works

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References (32)

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