Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm32a..07b&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM32A-07
Physics
2704 Auroral Phenomena (2407), 2712 Electric Fields (2411), 2772 Plasma Waves And Instabilities, 3220 Nonlinear Dynamics, 2451 Particle Acceleration
Scientific paper
The stability of electron holes observed by FAST in the return current region of the auroral oval is investigated. Starting from the first self-consistent 3D kinetic model of these Debye scale length electric field structures, we study the energy exchange between trapped electrons and the electrostatic whistler waves which are frequently observed in association with electron holes: by the use of the Hamiltonian formalism, action-angle variables, and canonical perturbation theory, we show that trapped electrons, due to their complex 3D periodic motion in the potential structure of the electron hole, enter into a resonance with the wave and may destabilize it. We derive the growth rate of the whistler waves and we obtain stability criteria for 3D electron holes. We compare these results with FAST observations.
Berthomier Mathieu
Bonnell J. W.
Carlson Carl W.
Muschietti L.
Roth Ilan
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