Issue
EPL
Volume 84, Number 6, December 2008
Article Number 69001
Number of page(s) 5
Section Geophysics, Astronomy and Astrophysics
DOI http://dx.doi.org/10.1209/0295-5075/84/69001
Published online 12 January 2009
EPL, 84 (2008) 69001
DOI: 10.1209/0295-5075/84/69001

On deformation of electron holes in phase space

R. A. Treumann1, 2, C. H. Jaroschek3 and R. Pottelette4

1   Department of Geophysics, Munich University - Theresienstr. 41, D-80333 Munich, Germany, EU
2   Department of Physics and Astronomy, Dartmouth College - Hanover, NH 03755, USA
3   Department of Earth and Planetary Sciences, Tokyo University - Tokyo, Japan
4   CETP/CNRS - St. Maur des Fossés Cedex, France, EU

treumann@issibern.ch

received 23 October 2008; accepted in final form 19 November 2008; published December 2008
published online 12 January 2009

Abstract
This letter shows that for particularly shaped background particle distributions the momentum exchange between phase space holes and the distribution causes acceleration of the holes along the magnetic field. In the particular case of a non-symmetric ring distribution (ring with loss cone) this acceleration is non-uniform in phase space being weaker at larger perpendicular velocities thus causing the deformation of the hole in phase space.

PACS
94.30.Aa - Auroral phenomena in magnetosphere.
94.20.wj - Wave/particle interactions.
94.05.Dd - Radiation processes.

© EPLA 2008