Skip navigation
Skip navigation

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

Download (466.59 kB)

link to publisher version

  • Altmetric Citations

Corr, C. S.; Boswell, R. W.

Description

Entrainment 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....[Show more]

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.identifier.issn1070-664X
dc.identifier.urihttp://hdl.handle.net/1885/38433
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.
dc.publisherAmerican Institute of Physics (AIP)
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/
dc.sourcePhysics of Plasmas
dc.subjectKeywords: Argon; Emission spectroscopy; Magnetic fields; Nonlinear equations; Plasma diagnostics; Plasmas; Acoustic instabilities; Forcing terms; Gas pressures; High densities; High-beta plasmas; Input power; Ion densities; Low-frequency instabilities; Non-linear i
dc.titleNonlinear instability dynamics in a high-density, high-beta plasma
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume16
dc.date.issued2009-02-18
local.identifier.absfor020204
local.identifier.ariespublicationU4735977xPUB2
local.publisher.urlhttps://www.aip.org/
local.type.statusPublished Version
local.contributor.affiliationCorr, Cormac, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University
local.contributor.affiliationBoswell, Roderick, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University
local.bibliographicCitation.issue2
local.bibliographicCitation.startpage022308
local.bibliographicCitation.lastpage1/4
local.identifier.doi10.1063/1.3074790
dc.date.updated2016-02-24T11:22:13Z
local.identifier.scopusID2-s2.0-61449218890
local.identifier.thomsonID000263800400025
CollectionsANU Research Publications

Download

File Description SizeFormat Image
01_Corr_Nonlinear_instability_dynamics_2009.pdf466.59 kBAdobe PDFThumbnail
Show simple item record


Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.

Updated:  17 November 2022/ Responsible Officer:  University Librarian/ Page Contact:  Library Systems & Web Coordinator