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On the threshold energization of radiation belt electrons by double layers


AuthorOsmane, A.; Pulkkinen, T.;
KeywordsRadiation belts; wave-particle interactions
AbstractUsing a Hamiltonian approach, we quantify the energization threshold of electrons interacting with radiation belts\textquoteright double layers discovered by Mozer et al. (2013). We find that double layers with electric field amplitude E0 ranging between 10 and 100 mV/m and spatial scales of the order of few Debye lengths are very efficient in energizing electrons with initial velocities v|| <= vth to 1 keV levels but are unable to energize electrons with E >= 100 keV. Our results indicate that the localized electric field associated with the double layers are unlikely to generate a seed population of 100 keV necessary for a plethora of relativistic acceleration mechanisms and additional transport to higher energetic levels.
Year of Publication2014
JournalJournal of Geophysical Research: Space Physics
Volume
Number of Pages
Section
Date Published10/2014
ISBN
URLhttp://doi.wiley.com/10.1002/2014JA020236
DOI10.1002/2014JA020236