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PIC simulations of relativistic electron flows: The fastest-growing mixed mode and the electromagnetic finite grid instability
Linköpings universitet, Institutionen för teknik och naturvetenskap, Visuell informationsteknologi och applikationer. Linköpings universitet, Tekniska högskolan.ORCID-id: 0000-0003-4055-0552
Stockholm Observatory Stockholm University.
ETSI Ind Univ Castilla-La Mancha.
Institute of Theoretical Physics IV Ruhr-University Bochum.
2007 (engelsk)Inngår i: 34th European Physical Society Conference on Plasma Physics,2007, Warsaw: European Physical Society , 2007, s. P2.078-Konferansepaper, Publicerat paper (Fagfellevurdert)
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.

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Warsaw: European Physical Society , 2007. s. P2.078-
Emneord [en]
plasma physics
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-38878Lokal ID: 46028OAI: oai:DiVA.org:liu-38878DiVA, id: diva2:259727
Tilgjengelig fra: 2009-10-10 Laget: 2009-10-10 Sist oppdatert: 2017-11-03

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Dieckmann, Mark E

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