Relativistic particle acceleration in the process of whistler-mode chorus wave generation

Yuto Katoh, Yoshiharu Omura

Research output: Contribution to journalArticlepeer-review

54 Citations (Scopus)

Abstract

We have found that efficient acceleration of resonant electrons takes place in a self-consistent particle simulation reproducing whistler-mode chorus emissions. While the majority of electrons lose energy contributing to the generation of chorus emissions, a fraction of resonant electrons having large pitch angle are simultaneously energized through nonlinear wave trapping by the generated chorus emissions. A small fraction of energetic electrons are energized over 100 keV during 2500 Ωe0-1. We also find that such accelerated electrons 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. The present study clarifies that the role of nonlinear wave trapping is significant in the energization process of relativistic electrons by narrowband whistler-mode chorus emissions.

Original languageEnglish
Article numberL13102
JournalGeophysical Research Letters
Volume34
Issue number13
DOIs
Publication statusPublished - 2007 Jul 16

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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