One-dimensional particle simulation of the filamentation instability: Electrostatic field driven by the magnetic pressure gradient force
Data(s) |
01/07/2009
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Resumo |
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. |
Identificador |
http://www.scopus.com/inward/record.url?scp=68249140007&partnerID=8YFLogxK |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Dieckmann , M E , Kourakis , I , Borghesi , M & Rowlands , G 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 , 074502 , pp. 074502-074502-4 . |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/3100/3104 #Condensed Matter Physics |
Tipo |
article |