Pitch angle scattering of relativistic electrons near EMIC resonances in diverging magnetic fields

B Eliasson, K Papadopoulos

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Abstract

A theoretical study of the propagation of left hand polarized shear Alfvén waves in spatially decreasing magnetic field geometries near the EMIC resonance, including the spectrum and amplitude of the mode converted EMIC waves and the pitch angle scattering of relativistic electrons transiting the resonant region, is presented. The objective of the paper is to motivate an experimental study of the subject using the UCLA LAPD chamber. The results are relevant in exploring the possibility that shear Alfvén waves strategically injected into the radiation belts using either ionospheric heating from ground based RF transmitters or injected by transmitters based on space platforms can enhance the precipitation rate of trapped relativistic electrons. Effects of multi-ionic composition are also investigated.
Original languageEnglish
Article number104003
Number of pages10
JournalPlasma Physics and Controlled Fusion
Volume59
Issue number10
Early online date4 Sep 2017
DOIs
Publication statusPublished - 31 Oct 2017

Keywords

  • pitch angle scattering
  • relativistic electrons
  • electromagnetic ion cyclotron waves

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