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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 9 | Copyright
Ann. Geophys., 26, 2749-2758, 2008
https://doi.org/10.5194/angeo-26-2749-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  15 Sep 2008

15 Sep 2008

Comparison of multi-point measurements of current sheet structure and analytical models

A. V. Artemyev1, A. A. Petrukovich1, L. M. Zelenyi1, H. V. Malova1,2, V. Y. Popov1,3, R. Nakamura4, A. Runov5, and S. Apatenkov6 A. V. Artemyev et al.
  • 1Space Research Institute, Russian Academy of Sciences, Moscow, Russia
  • 2Nuclear Physics Institute, Moscow State University, Russia
  • 3Faculty of Physics, Moscow State University, Russia
  • 4Space Research Institute, Austrian Academy of sciences, Graz, Austria
  • 5Institute of Geophysics and Planetary Physics, UCLA, Los Angeles, USA
  • 6St. Petersburg University, St. Petersburg, Russia

Abstract. Current density profiles of 22 thin current sheets, crossed by four Cluster spacecraft in the magnetotail are compared with the self-consistent model of anisotropic 1-D equilibrium, including several species of quasi-adiabatic (transient) ions and drifting electrons. In order to examine ion-scale features of the current density profile Cluster data from the 2001 and 2004 tail seasons were used when the spacecraft separation was about 2000 and 1000 km, respectively, while electron-scale features are studied using Cluster data from the 2003 season , when the spacecraft separation was about 200 km. The model ion and electron current density peaks embedded in a background plasma sheet successfully reproduce observed profiles. Stability criteria of the model current sheet are also consistent with the experiment.

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