Statistical Properties of the Radiation Belt Seed Population

TitleStatistical Properties of the Radiation Belt Seed Population
Publication TypeJournal Article
Year of Publication2016
AuthorsBoyd, AJ, Spence, HE, Huang, C-L, Reeves, GD, Baker, DN, Turner, DL, Claudepierre, SG, Fennell, JF, Blake, JB, Shprits, YY
JournalJournal of Geophysical Research: Space Physics
Date Published07/2016
KeywordsPhase space density; Radiation belt; seed population; Van Allen Probes
AbstractWe present a statistical analysis of phase space density data from the first 26 months of the Van Allen Probes mission. In particular we investigate the relationship between the 10s-100s keV seed electrons and >1 MeV core radiation belt electron population. Using a cross correlation analysis, we find that the seed and core populations are well correlated with a coefficient of ≈ 0.73 with a time lag of 10-15 hours. We present evidence of a seed population threshold that is necessary for subsequent acceleration. The depth of penetration of the seed population determines the inner boundary of the acceleration process. However, we show that an enhanced seed population alone is not enough to produce acceleration in the higher energies, implying that the seed population of 100s of keV electrons is only one of several conditions required for MeV electron radiation belt acceleration.
URLhttp://doi.wiley.com/10.1002/2016JA022652
DOI10.1002/2016JA022652
Short TitleJ. Geophys. Res. Space Physics


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