Phase mixing of shear Alfvén waves as a new mechanism for electron acceleration in collisionless, kinetic plasmas
Tsiklauri, D, Sakai, J-I and Saito, S 2005, 'Phase mixing of shear Alfvén waves as a new mechanism for electron acceleration in collisionless, kinetic plasmas' , New Journal of Physics, 7 , p. 79.
|PDF (Publisher version) |
Download (1260kB) | Preview
Particle-in-cell (kinetic) simulations of shear Alfv´en wave (AW) interaction with one-dimensional, across the uniform-magnetic field, density inhomogeneity (phase mixing) in collisionless plasma were performed for the first time. As a result, a new electron acceleration mechanism is discovered. Progressive distortion of the AW front, due to the differences in local Alfv´en speed, generates electrostatic fields nearly parallel to the magnetic field, which accelerate electrons via Landau damping. Surprisingly, the amplitude decay law in the inhomogeneous regions, in the kinetic regime, is the same as in the MHD approximation described by Heyvaerts and Priest (1983 Astron. Astrophys. 117 220).
|Themes:||Subjects / Themes > Q Science > QC Physics|
Subjects outside of the University Themes
|Schools:||Colleges and Schools > College of Science & Technology|
Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
|Journal or Publication Title:||New Journal of Physics|
|Publisher:||Institute of Physics|
|Depositing User:||MDJ Davies|
|Date Deposited:||22 Oct 2007 14:27|
|Last Modified:||27 Sep 2011 12:23|
Document DownloadsMore statistics for this item...
Actions (login required)
|Edit record (repository staff only)|