Bibliography



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2016

The complex nature of storm-time ion dynamics: Transport and local acceleration

Data from the Van Allen Probes Helium, Oxygen, Proton, Electron (HOPE) spectrometers reveal hitherto unresolved spatial structure and dynamics in ion populations. Complex regions of O+ dominance, at energies from a few eV to >10 keV, are observed throughout the magnetosphere. Isolated regions on the dayside that are rich in energetic O+ might easily be interpreted as strong energization of ionospheric plasma. We demonstrate, however, that both the energy spectrum and the limited MLT extent of these features can be explained by energy-dependent drift of particles injected on the night side 24 hours earlier. Particle tracing simulations show that the energetic O+ can originate in the magnetotail, not in the ionosphere. Enhanced wave activity is co-located with the heavy-ion rich plasma and we further conclude that the waves were not a source of free energy for accelerating ionospheric plasma but rather the consequence of the arrival of substorm-injected plasma.

Denton, M.; Reeves, G.; Thomsen, M.; Henderson, M.; Friedel, R.; Larsen, B.; Skoug, R.; Funsten, H.; Spence, H.; Kletzing, C.;

Published by: Geophysical Research Letters      Published on: 09/2016

YEAR: 2016     DOI: 10.1002/2016GL070878

plasmasheet; Van Allen Probes



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