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One-dimensional particle simulation of the filamentation instability: Electrostatic field driven by the magnetic pressure gradient force
Queen’s University Belfast. (Scientific Visualization)ORCID iD: 0000-0003-4055-0552
CPP, Queen's University Belfast, UK.
CPP, Queen's University Belfast, UK.
Physics Department, Warwick University, UK.
2009 (English)In: Physics of Plasmas, ISSN 1070-664X, E-ISSN 1089-7674, Vol. 16, no 7, 074502-1-074502-4 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
College Park, Maryland: American Institute of Physics , 2009. Vol. 16, no 7, 074502-1-074502-4 p.
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:liu:diva-50698DOI: 10.1063/1.3160629OAI: oai:DiVA.org:liu-50698DiVA: diva2:271934
Available from: 2009-10-13 Created: 2009-10-13 Last updated: 2017-12-12

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Publisher's full texthttp://link.aip.org/link/?PHPAEN/16/074502/1

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Dieckmann, Mark Eric

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