Lower-hybrid waves generated by anomalous Doppler resonance in auroral plasmas

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Abstract

This paper describes sonic aspects of lower-hybrid wave activity in space plasmas. Lower-hybrid waves are particularly important since they can transfer energy efficiently between electrons and ions in a collisionless magnetized plasma. We consider the 'fan' or anomalous Doppler resonance instability driven by energetic electron tails and show that it is responsible for the generation of lower-hybrid waves. We also demonstrate that observations of their intensity are sufficient to drive the modulational instability.

Original languageEnglish
Pages (from-to)539-546
Number of pages8
JournalJournal of Plasma Physics
Volume76
Issue numberSpecial Issue 3-4
Early online date21 Jan 2010
DOIs
Publication statusPublished - 1 Aug 2010

Keywords

  • X-ray-emission
  • Transverse ion-acceleration
  • Solitary structures
  • Horseshoe distributions
  • Particle-acceleration
  • Electron acceleration
  • Suprauroral region
  • Sounding rocket
  • Field lines
  • Solar-wind

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