Nonlinear electric field structures in the inner magnetosphere D. M. Malaspina 1, L. Andersson 1, R. E. Ergun 1, J. R. Wygant 2, J. W. Bonnell 3, C. Kletzing.

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Presentation transcript:

Nonlinear electric field structures in the inner magnetosphere D. M. Malaspina 1, L. Andersson 1, R. E. Ergun 1, J. R. Wygant 2, J. W. Bonnell 3, C. Kletzing 4, G. D. Reeves 5, R. M. Skoug 5, and B. A. Larsen 5 [1] U. Colorado / LASP [2] U. Minnesota [3] U.C. Berkeley [4] U. Iowa [5] Los Alamos Van Allen Probes SWG Sept Mozer et al., 2013, PRL Mozer et al., 2014, PRL Chaston et al., 2014, GRL Malaspina et al. 2014, GRL

Nonlinear Electric Field Structures in the Inner Magnetosphere Diverse structures found < 6.6 RE: Electron double-layers (Mozer et al. 2013) Kinetic Alfven waves (Chaston et al. 2014) Strong double layers (Malaspina et al. 2014) Phase space holes (Malaspina et al. 2014) Steepened chorus waves (Mozer et al. 2014) Frequently Observed: With dispersionless injection fronts Inner edge of plasma sheet Trapped / un-trapped boundary crossings With sharp plasmapause crossings Throughout m’sphere during shock impact Enable prompt, local acceleration: Often high amplitude (> 20 mV/m) E-fields parallel to B Indicative of strong field-aligned currents Related to ‘seed population’ creation ? (Mozer et al. 2014)

Nonlinear Structures in Extended Mission Sample new regions: New range of MLaT in night sector accessible in extended mission Tune instruments: Adjust EFW and/or EMFISIS spectral data coverage to full duty cycle Coordinate MagEIS bursts w/ EFW or EMFISIS bursts Trigger wave bursts on broad-band E-fields (or AE when in dusk sector) Directly addresses: Theme 1: injection temporal structure, evolution, effects on radiation belt and ring current Theme 5: Detailed character of microphysical processes that energize radiation belt particles Theme 6: Coupling between the magnetopause and the inner magnetosphere