Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 33, issue 3
Articles | Volume 33, issue 3
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:
https://doi.org/10.5194/angeo-33-279-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 33, issue 3
Regular paper
 | 
04 Mar 2015
Regular paper |  | 04 Mar 2015

Vlasov simulations of trapping and loss of auroral electrons

H. Gunell, L. Andersson, J. De Keyser, and I. Mann

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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.
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Special issue
Dynamic processes in geospace