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Nonlinear instability dynamics in a high-density, high-beta plasma

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dc.contributor.authorCorr, C. S.
dc.contributor.authorBoswell, R. W.
dc.date.accessioned2015-12-08T23:36:22Z
dc.date.available2015-12-08T23:36:22Z
dc.date.issued2009-02-18
dc.description.abstractEntrainment and periodic pulling of an ion acoustic instability have been observed in the power spectra of a low-pressure high-beta plasma. The observed nonlinear phenomena can be modeled by using the van der Pol equation with a forcing term. Experimental results of the nonlinear processes are presented. Ion density fluctuations are detected on a negatively biased Langmuir probe for magnetic fields and input powers above 30 G and 900 W at 7.2 MHz respectively, and gas pressure below 1.5 mTorr. This low-frequency instability is observed in the central plasma blue core (argon II emission) and can be controlled by amplitude modulation of the radio frequency input power at frequencies close to the instability frequency.en_AU
dc.identifier.issn1070-664Xen_AU
dc.identifier.urihttp://hdl.handle.net/1885/38433
dc.publisherAmerican Institute of Physics (AIP)en_AU
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/1070-664X..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 9/12/15). Copyright (year) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (citation of published article) and may be found at https://doi.org/en_AU
dc.sourcePhysics of Plasmasen_AU
dc.titleNonlinear instability dynamics in a high-density, high-beta plasmaen_AU
dc.typeJournal articleen_AU
local.bibliographicCitation.issue2en_AU
local.bibliographicCitation.startpage022308en_AU
local.contributor.affiliationCorr, Cormac, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National Universityen_AU
local.contributor.affiliationBoswell, Roderick, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National Universityen_AU
local.contributor.authoruidu4321701en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020204en_AU
local.identifier.ariespublicationU4735977xPUB2en_AU
local.identifier.citationvolume16en_AU
local.identifier.doi10.1063/1.3074790en_AU
local.publisher.urlhttps://www.aip.org/en_AU
local.type.statusPublished Versionen_AU

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