Relativistic electron acceleration in the generation process of whistler-mode chorus by a self- consistent particle simulation

Details Relativistic electron acceleration in the generation process of whistler-mode chorus by a self- consistent particle simulation Relativistic electron acceleration in the generation process of whistler-mode chorus by a self- consistent particle simulation

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm21a0328k&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM21A-0328

Physics

2720 Energetic Particles: Trapped, 2772 Plasma Waves And Instabilities (2471), 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

We study acceleration of relativistic electrons in a self-consistent particle simulation with a dipole magnetic field model reproducing chorus emissions with rising tones. The simulation result shows that the majority of electrons lose energy contributing to the generation of chorus emissions and that a fraction of resonant electrons having large pitch angles are accelerated through nonlinear wave trapping by the generated chorus emissions. A small fraction of resonant electrons are effectively accelerated while they show a characteristic behavior, turning their motion from equatorward to poleward during the acceleration process, which is explained by the relativistic turning acceleration (RTA) process. Simulation result reveals that trapped electrons are effectively accelerated by the RTA process over 100 keV during 2500 gyro-periods. The present study demonstrates that the role of nonlinear wave trapping is significant in the energization process of relativistic electrons by narrowband whistler- mode chorus emissions.

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