Nonlinear Electric Field Structures in the Inner Magnetosphere
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Abstract |
Van Allen Probes observations are presented which demonstrate the presence of nonlinear electric field structures in the inner terrestrial magnetosphere (< 6 RE). A range of structures are observed, including phase space holes and double layers.These structures are observed over several Earth radii in radial distance and over a wide range of magnetic local times. They are observed in the dusk, midnight, and dawn sectors, with the highest concentration pre-midnight. Some nonlinear electric field structures are observed to coincide with dipolarizations of the magnetic field and increases in electron energy flux for energies between 1 keV and 30 keV. Nonlinear electric field structures possess isolated impulsive electric fields, often with a significant component parallel to the ambient magnetic field, providing a mechanism for non-adiabatic wave-particle interactions in the inner magnetosphere.
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Year of Publication |
2014
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Journal |
Geophysical Research Letters
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Volume |
41
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Start Page |
5693
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Date Published |
08/2014
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URL |
http://doi.wiley.com/10.1002/2014GL061109
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DOI |
10.1002/2014GL061109
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