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Filamentation Instability of Counterpropagating Charged Particle Beams: Statistical Properties
Linköpings universitet, Institutionen för teknik och naturvetenskap, Visuell informationsteknologi och applikationer. Linköpings universitet, Tekniska högskolan. Centre for Plasma Physics, Queen’s University Belfast, Belfast , U.K..ORCID-id: 0000-0003-4055-0552
2008 (engelsk)Inngår i: FRONTIERS IN MODERN PLASMA PHYSICS: 2008 ICTP International Workshop on the Frontiers of Modern Plasma Physics / [ed] Padma K. Shukla , Bengt Eliasson, Lennart Stenflo, College Park, MD United States: American Institute of Physics (AIP), 2008, s. 237-245Konferansepaper, Publicerat paper (Fagfellevurdert)
Abstract [en]

The filamentation instability (FI) driven by beams of counter-propagating electrons is examined with one dimensional (1D) and two-dimensional (2D) particle-in-cell (PIC) simulations. The 1D simulation reveals the saturation mechanism of the FI. The magnetic pressure gradient displaces the electrons. The resulting electrostatic field inhibits together with the magnetic field a further growth of the filaments by suppressing the electron motion. The FI evolves into a stationary equilibrium in 1D, which shows a statistical distribution of the filament sizes that resembles a Gumbel distribution. The 2D PIC simulation allows the filaments to move around each other and filaments carrying currents of equal polarity can merge. The time-evolution of the characteristic size of the filaments in the 2D simulation is measured. It increases linearly with the time.

sted, utgiver, år, opplag, sider
College Park, MD United States: American Institute of Physics (AIP), 2008. s. 237-245
Serie
AIP Conference Proceedings, ISSN 0094-243X ; 1061
Emneord [en]
plasma physics
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-43188DOI: 10.1063/1.3013773ISI: 000260486000024Lokal ID: 72720ISBN: 978-0-7354-0591-2 (tryckt)OAI: oai:DiVA.org:liu-43188DiVA, id: diva2:264047
Konferanse
2008 ICTP International Workshop on the Frontiers of Modern Plasma Physics, Trieste Italy, 14–25 July 2008
Tilgjengelig fra: 2009-10-10 Laget: 2009-10-10 Sist oppdatert: 2017-11-03bibliografisk kontrollert

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