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PIC simulations of relativistic electron flows: The fastest-growing mixed mode and the electromagnetic finite grid instability
Linköping University, Department of Science and Technology, Visual Information Technology and Applications (VITA). Linköping University, The Institute of Technology.
Stockholm Observatory Stockholm University.
ETSI Ind Univ Castilla-La Mancha.
Institute of Theoretical Physics IV Ruhr-University Bochum.
2007 (English)In: 34th European Physical Society Conference on Plasma Physics,2007, Warsaw: European Physical Society , 2007, P2.078- p.Conference paper (Refereed)
Abstract [en]

Instabilities driven by two electron beams that stream at the relativistic relative velocity vb are important as a plasma thermalization and magnetic field generation mechanism in astrophysics and in inertial confinement fusion. The time-evolution of such instabilities, which are subdivided into the two-stream, mixed mode and filamentation (beam-Weibel) instability, is multi-dimensional and nonlinear and the instabilities are usually modelled with particle-in-cell (PIC) simulations. We examine the wave spectrum we obtain, if both beams have a density ratio 9 and (1-vb^2/c^2)^(-1/2)=4. The mixed mode dominates and grows fastest for highly relativistic vb. An electromagnetic finite grid instability is shown to generate artificial magnetic fields, imposing a simulation constraint.

Place, publisher, year, edition, pages
Warsaw: European Physical Society , 2007. P2.078- p.
Keyword [en]
plasma physics
National Category
Engineering and Technology
URN: urn:nbn:se:liu:diva-38878Local ID: 46028OAI: diva2:259727
Available from: 2009-10-10 Created: 2009-10-10 Last updated: 2011-01-04

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Dieckmann, Mark E
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Visual Information Technology and Applications (VITA)The Institute of Technology
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ReferencesLink to record
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