Van Allen Probe observations of drift-bounce resonances with Pc 4 pulsations and wave–particle interactions in the pre-midnight inner magnetosphere

G. I. Korotova; D. G. Sibeck; K. Tahakashi; L. Dai; H. E. Spence; C. A. Kletzing; J. R. Wygant; J. W. Manweiler; P. S. Moya; K.-J. Hwang; R. J. Redmon

doi:10.5194/angeo-33-955-2015

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Van Allen Probe observations of drift-bounce resonances with Pc 4 pulsations and wave–particle interactions in the pre-midnight inner magnetosphere

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Van Allen Probe observations of drift-bounce resonances with Pc 4 pulsations and wave–particle interactions in the pre-midnight inner magnetosphere

G. I. Korotova, D. G. Sibeck, K. Tahakashi, L. Dai, H. E. Spence, C. A. Kletzing, J. R. Wygant, J. W. Manweiler, P. S. Moya, K.-J. Hwang, …

Annales geophysicae (1988), Vol.33(8), pp.955-964

08/01/2015

DOI: 10.5194/angeo-33-955-2015

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Abstract

We present Van Allen Probe B observations of azimuthally limited, antisymmetric, poloidal Pc 4 electric and magnetic field pulsations in the pre-midnight sector of the magnetosphere from 05:40 to 06:00 UT on 1 May 2013. Oscillation periods were similar for the magnetic and electric fields and proton fluxes. The flux of energetic protons exhibited an energy-dependent response to the pulsations. Energetic proton variations were anticorrelated at medium and low energies. Although we attribute the pulsations to a drift-bounce resonance, we demonstrate that the energy-dependent response of the ion fluxes results from pulsation-associated velocities sweeping energy-dependent radial ion flux gradients back and forth past the spacecraft.

Details

Title: Subtitle: Van Allen Probe observations of drift-bounce resonances with Pc 4 pulsations and wave–particle interactions in the pre-midnight inner magnetosphere
Creators: G. I. Korotova - University of Maryland, College Park
D. G. Sibeck - Goddard Space Flight Center
K. Tahakashi - JHU/APL, Laurel, MD, USA
L. Dai - University of Minnesota
H. E. Spence - University of New Hampshire
C. A. Kletzing - University of Iowa
J. R. Wygant - University of Minnesota
J. W. Manweiler - Fundamental Technologies, LLC, Lawrence, KS, USA
P. S. Moya - Goddard Space Flight Center
K.-J. Hwang - Goddard Space Flight Center
R. J. Redmon - National Oceanic and Atmospheric Administration
Resource Type: Journal article
Publication Details: Annales geophysicae (1988), Vol.33(8), pp.955-964
DOI: 10.5194/angeo-33-955-2015
ISSN: 0992-7689
eISSN: 1432-0576
Publisher: Copernicus Publications
Language: English
Date published: 08/01/2015
Academic Unit: Physics and Astronomy
Record Identifier: 9984199762302771

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