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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 24, issue 12
Ann. Geophys., 24, 3547–3556, 2006
https://doi.org/10.5194/angeo-24-3547-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 24, 3547–3556, 2006
https://doi.org/10.5194/angeo-24-3547-2006
© Author(s) 2006. This work is distributed under
the Creative Commons Attribution 3.0 License.

  21 Dec 2006

21 Dec 2006

Energetic ion injection and formation of the storm-time symmetric ring current

L. Xie1, Z. Y. Pu1, X. Z. Zhou1, S. Y. Fu1, Q.-G. Zong2, and M. H. Hong3 L. Xie et al.
  • 1School of Earth and Space Sciences, Peking University, Beijing, 100871, China
  • 2Center for Space Physics, Boston University, Boston, 02215, USA
  • 3Institute of Geology and Geophysics, Chinese Academy of Science, 100029, China

Abstract. An extensive study of ring current injection and intensification of the storm-time ring current is conducted with three-dimensional (3-D) test particle trajectory calculations (TPTCs). The TPTCs reveal more accurately the process of ring current injection, with the main results being the following: (1) an intense convection electric field can effectively energize and inject plasma sheet particles into the ring current region within 1–3 h. (2) Injected ions often follow chaotic trajectories in non-adiabatic regions, which may have implications in storm and ring current physics. (3) The shielding electric field, which arises as a consequence of enhanced convection and co-exists with the injection and convection electric field, may cause the original open trajectories of injected ions with higher energy to change into closed ones, thus playing a role in the formation of the symmetric ring current.

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