Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.585 IF 1.585
  • IF 5-year value: 1.698 IF 5-year
    1.698
  • CiteScore value: 1.62 CiteScore
    1.62
  • SNIP value: 0.820 SNIP 0.820
  • IPP value: 1.52 IPP 1.52
  • SJR value: 0.781 SJR 0.781
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 83 Scimago H
    index 83
  • h5-index value: 24 h5-index 24
Volume 26, issue 11
Ann. Geophys., 26, 3451–3456, 2008
https://doi.org/10.5194/angeo-26-3451-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 26, 3451–3456, 2008
https://doi.org/10.5194/angeo-26-3451-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  06 Nov 2008

06 Nov 2008

Rapid energization of radiation belt electrons by nonlinear wave trapping

Y. Katoh1,2, Y. Omura1, and D. Summers1,3 Y. Katoh et al.
  • 1Research Institute for Sustainable Humanosphere, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
  • 2Planetary Plasma and Atmospheric Research Center, Graduate School of Science, Tohoku Univ., Sendai 980-8578, Japan
  • 3Dept. of Mathematics and Statistics, Memorial University of Newfoundland, St. John's, Newfoundland, A1C 5S7 Canada

Abstract. We show that nonlinear wave trapping plays a significant role in both the generation of whistler-mode chorus emissions and the acceleration of radiation belt electrons to relativistic energies. We have performed particle simulations that successfully reproduce the generation of chorus emissions with rising tones. During this generation process we find that a fraction of resonant electrons are energized very efficiently by special forms of nonlinear wave trapping called relativistic turning acceleration (RTA) and ultra-relativistic acceleration (URA). Particle energization by nonlinear wave trapping is a universal acceleration mechanism that can be effective in space and cosmic plasmas that contain a magnetic mirror geometry.

Publications Copernicus
Download
Citation