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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 33, issue 3
Ann. Geophys., 33, 279–293, 2015
https://doi.org/10.5194/angeo-33-279-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Dynamic processes in geospace

Ann. Geophys., 33, 279–293, 2015
https://doi.org/10.5194/angeo-33-279-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Regular paper 04 Mar 2015

Regular paper | 04 Mar 2015

Vlasov simulations of trapping and loss of auroral electrons

H. Gunell et al.

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Short summary
In this paper, we simulate the plasma on a magnetic field line above the aurora. Initially, about half of the acceleration voltage is concentrated in a thin double layer at a few thousand km altitude. When the voltage is lowered, electrons trapped between the double layer and the magnetic mirror are released. In the process we see formation of electron beams and phase space holes. A temporary reversal of the polarity of the double layer is also seen as well as hysteresis effects in its position.
In this paper, we simulate the plasma on a magnetic field line above the aurora. Initially,...
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