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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 3
Ann. Geophys., 16, 322–330, 1998
https://doi.org/10.1007/s00585-998-0322-4
© European Geosciences Union 1998
Ann. Geophys., 16, 322–330, 1998
https://doi.org/10.1007/s00585-998-0322-4
© European Geosciences Union 1998

  31 Mar 1998

31 Mar 1998

A quantitative model for cyclotron wave-particle interactions at the plasmapause

D. L. Pasmanik1, V. Y. Trakhtengerts1, A. G. Demekhov1, A. A. Lyubchich2, E. E. Titova2, T. Yahnina2, M. J. Rycroft3, J. Manninen4, and T. Turunen4 D. L. Pasmanik et al.
  • 1Institute of Applied Physics, Nizhny Novgorod, Russia
  • 2Polar Geophysical Institute, Apatity, Russia
  • 3International Space University, Illkirch, France
  • 4Geophysical Observatory, Sodankylä, Finland

Abstract. The formation of a zone of energetic electron precipitation by the plasmapause, a region of enhanced plasma density, following energetic particle injection during a magnetic storm, is analyzed. Such a region can also be formed by detached cold plasma clouds appearing in the outer magnetosphere by restructuring of the plasmasphere during a magnetic storm. As a mechanism of precipitation, wave-particle interactions by the cyclotron instability between whistler-mode waves and electrons are considered. In the framework of the self-consistent equations of quasi-linear plasma theory, the distribution function of trapped electrons and the electron precipitation pattern are found. The theoretical results are compared with experimental data obtained from NOAA satellites.

Key words. Magnetospheric physics · Energetic particles · Precipitating and trapped · Plasma waves and instabilities

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