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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 29, issue 2
Ann. Geophys., 29, 321–330, 2011
https://doi.org/10.5194/angeo-29-321-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 29, 321–330, 2011
https://doi.org/10.5194/angeo-29-321-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 11 Feb 2011

ANGEO Communicates | 11 Feb 2011

Pitch-angle diffusion coefficients from resonant interactions with electrostatic electron cyclotron harmonic waves in planetary magnetospheres

A. K. Tripathi1, R. P. Singhal1, and K. P. Singh2 A. K. Tripathi et al.
  • 1Department of Applied Physics, Institute of Technology, Banaras Hindu University, Varanasi-221005, India
  • 2Department of Electronics Engg, Institute of Technology, Banaras Hindu University, Varanasi-221005, India

Abstract. Pitch-angle diffusion coefficients have been calculated for resonant interaction with electrostatic electron cyclotron harmonic (ECH) waves in the magnetospheres of Earth, Jupiter, Saturn, Uranus and Neptune. Calculations have been performed at two radial distances of each planet. It is found that observed wave electric field amplitudes in the magnetospheres of Earth and Jupiter are sufficient to put electrons on strong diffusion in the energy range of less than 100 eV. However, for Saturn, Uranus and Neptune, the observed ECH wave amplitude are insufficient to put electrons on strong diffusion at any radial distance.

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