Bibliography

Van Allen Probes Bibliography is from August 2012 through September 2021

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Observations of density cavities and associated warm ion flux enhancements in the inner magnetosphere

Author	Ferradas, C.; Boardsen, S.; Fok, M.-C.; Buzulukova, N.; Reeves, G.; Larsen, B.;
Keywords	Magnetosphere: inner; plasmasphere; magnetospheric configuration and dynamics; plasma waves and instabilities; plasma sheet; density cavity; cold ion heating; cold ions; warm Plasma cloak; Van Allen Probes
Abstract	Abstract We present a statistical study of density cavities observed in the inner magnetosphere by the Van Allen Probes during four one-month periods: February 2013, July 2013, January 2014 and June 2014. These periods were chosen to allow the survey of all magnetic local times. We find that density cavities are a recurrent feature of the density profiles of in situ measurements in the inner magnetosphere. We further investigate the correlation between the density cavities and the enhancement of fluxes of warm ions with energies of 10-100 eV. The results show that warm ion flux enhancements associated with the density cavities were observed more frequently for H+, then for He+ and the least frequently for O+. The occurrences of the associated flux enhancements were increased when considering only the cavities inside the plasmasphere. Possible mechanisms responsible for the observed warm ion flux enhancements and the role of density cavities on these ion flux enhancements are discussed.
Year of Publication	2021
Journal	Journal of Geophysical Research: Space Physics
Volume	n/a
Number of Pages	e2020JA028326
Section
Date Published	02/2021
ISBN
URL	https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2020JA028326
DOI	https://doi.org/10.1029/2020JA028326