Articles | Volume 29, issue 2
https://doi.org/10.5194/angeo-29-321-2011
https://doi.org/10.5194/angeo-29-321-2011
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. Tripathi, R. P. Singhal, and K. P. Singh

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.