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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 30, issue 2
Ann. Geophys., 30, 317–324, 2012
https://doi.org/10.5194/angeo-30-317-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 30, 317–324, 2012
https://doi.org/10.5194/angeo-30-317-2012
© Author(s) 2012. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 07 Feb 2012

Regular paper | 07 Feb 2012

Ion resonance acceleration by dipolarization fronts: analytic theory and spacecraft observation

A. V. Artemyev1,2, V. N. Lutsenko1, and A. A. Petrukovich1 A. V. Artemyev et al.
  • 1Space Research Institute, RAS, Moscow, Russia
  • 2UMR6115, LPC2E/CNRS – University of Orleans, Orleans, France

Abstract. In this paper, we consider the mechanism of ion acceleration by dipolarization fronts in the Earth's magnetotail. The statistics of dipolarization front observations by Interball-tail have been collected from 1995 to 1998 (51 events). We demonstrate that near dipolarization fronts bursts of energetic ions are often observed with an average energy of about 100–200 keV. We develop the analytical model of the ion resonance interaction with dipolarization fronts to describe the observed acceleration. We compare the model and the observations to estimate the width of fronts along the dawn-dusk direction, Ry. The mean value is ⟨ Ry ⟩ ~6 RE.

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