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Electron trapping and acceleration by kinetic Alfven waves in the inner magnetosphere

  • Author(s) / Creator(s)
  • In this paper we study the interaction of kinetic Alfven waves generated near the equatorial plane of the magnetosphere with electrons having initial energies up to similar to 100 eV. Wave-particle interactions are investigated using a theoretical model of trapping into an effective potential generated by the wave parallel electric field and the mirror force acting along geomagnetic field lines. It is demonstrated that waves with an effective potential amplitude on the order of similar to 100-400 V and with perpendicular wavelengths on the order of the ion gyroradius can trap and efficiently accelerate electrons up to energies of several keV. Trapping acceleration corresponds to conservation of the electron magnetic moment and, thus, results in a significant decrease of the electron equatorial pitch angle with time. Analytical and numerical estimates of the maximum energy and probability of trapping are presented, and the application of the proposed model is discussed.

  • Date created
    2015
  • Subjects / Keywords
  • Type of Item
    Article (Published)
  • DOI
    https://doi.org/10.7939/R3X34N63S
  • License
    © 2015 American Geophysical Union. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
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  • Citation for previous publication
    • Artemyev, Anton V., Rankin, Robert, & Blanco, Mauricio. (2015). Electron trapping and acceleration by kinetic Alfven waves in the inner magnetosphere. Journal of Geophysical Research: Space Physics, 120(12), 10,305–10,316. http://doi.org/10.1002/2015JA021781
  • Link to related item
    http://doi.org/10.1002/2015JA021781