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One-dimensional particle simulation of the filamentation instability: Electrostatic field driven by the magnetic pressure gradient force
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Dieckmann, M. E., Kourakis, I., Borghesi, M. and Rowlands, G. (George) (2009) One-dimensional particle simulation of the filamentation instability: Electrostatic field driven by the magnetic pressure gradient force. Physics of Plasmas, Vol.16 (No.7). Article no. 074502 . doi:10.1063/1.3160629 ISSN 1070-664X.
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Official URL: http://dx.doi.org/10.1063/1.3160629
Abstract
Two counterpropagating cool and equally dense electron beams are modeled with particle-in-cell simulations. The electron beam filamentation instability is examined in one spatial dimension, which is an approximation for a quasiplanar filament boundary. It is confirmed that the force on the electrons imposed by the electrostatic field, which develops during the nonlinear stage of the instability, oscillates around a mean value that equals the magnetic pressure gradient force. The forces acting on the electrons due to the electrostatic and the magnetic field have a similar strength. The electrostatic field reduces the confining force close to the stable equilibrium of each filament and increases it farther away, limiting the peak density. The confining time-averaged total potential permits an overlap of current filaments with an opposite flow direction.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physics of Plasmas | ||||
| Publisher: | American Institute of Physics | ||||
| ISSN: | 1070-664X | ||||
| Official Date: | July 2009 | ||||
| Dates: |
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| Volume: | Vol.16 | ||||
| Number: | No.7 | ||||
| Number of Pages: | 4 | ||||
| Page Range: | Article no. 074502 | ||||
| DOI: | 10.1063/1.3160629 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Queen's University Belfast, VetenskapsrAdet, DFG | ||||
| Grant number: | FOR1048 |
Data sourced from Thomson Reuters' Web of Knowledge
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