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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 31, issue 9
Ann. Geophys., 31, 1485–1490, 2013
https://doi.org/10.5194/angeo-31-1485-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 31, 1485–1490, 2013
https://doi.org/10.5194/angeo-31-1485-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.

ANGEO Communicates 05 Sep 2013

ANGEO Communicates | 05 Sep 2013

Electron pitch-angle diffusion: resonant scattering by waves vs. nonadiabatic effects

A. V. Artemyev1,2, K. G. Orlova3,4, D. Mourenas5, O. V. Agapitov1,6, and V. V. Krasnoselskikh1 A. V. Artemyev et al.
  • 1LPC2E/CNRS – University of Orleans, UMR7328, Orleans, France
  • 2Space Research Institute, RAS, Moscow, Russian Federation
  • 3Department of Earth and Space Sciences, University of California, Los Angeles, CA, USA
  • 4Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russian Federation
  • 5CEA, DAM, DIF, 91297, Arpajon, France
  • 6National Taras Shevchenko University of Kiev, Kiev, Ukraine

Abstract. In this paper we investigate the electron pitch-angle diffusion coefficients in the night-side inner magnetosphere around the geostationary orbit (L ~ 7) due to magnetic field deformation. We compare the effects of resonant wave–particle scattering by lower band chorus waves and the adiabaticity violation of electron motion due to the strong curvature of field lines in the vicinity of the equator. For a realistic magnetic field configuration, the nonadiabatic effects are more important than the wave–particle interactions for high energy (> 1 MeV) electrons. For smaller energy, the scattering by waves is more effective than nonadiabatic one. Moreover, the role of nonadiabatic effects increases with particle energy. Therefore, to model electron scattering and transport in the night-side inner magnetosphere, it is important to take into account the peculiarities of high-energy electron dynamics.

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