A flowing plasma model to describe drift waves in a cylindrical helicon discharge
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Chang, L.; Hole, M. J.; Cormac, C. S.
Description
A two-fluid model developed originally to describe waveoscillations in the vacuum arc centrifuge, a cylindrical, rapidly rotating, low temperature, and confined plasma column, is applied to interpret plasma oscillations in a RF generated linear magnetized plasma [WOMBAT (waves on magnetized beams and turbulence)], with similar density and field strength. Compared to typical centrifuge plasmas, WOMBAT plasmas have slower normalized rotation frequency, lower temperature, and lower axial velocity....[Show more]
dc.contributor.author | Chang, L. | |
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dc.contributor.author | Hole, M. J. | |
dc.contributor.author | Cormac, C. S. | |
dc.date.accessioned | 2015-12-08T01:26:10Z | |
dc.date.available | 2015-12-08T01:26:10Z | |
dc.identifier.issn | 1070-664X | |
dc.identifier.uri | http://hdl.handle.net/1885/28550 | |
dc.description.abstract | A two-fluid model developed originally to describe waveoscillations in the vacuum arc centrifuge, a cylindrical, rapidly rotating, low temperature, and confined plasma column, is applied to interpret plasma oscillations in a RF generated linear magnetized plasma [WOMBAT (waves on magnetized beams and turbulence)], with similar density and field strength. Compared to typical centrifuge plasmas, WOMBAT plasmas have slower normalized rotation frequency, lower temperature, and lower axial velocity. Despite these differences, the two-fluid model provides a consistent description of the WOMBAT plasma configuration and yields qualitative agreement between measured and predicted waveoscillation frequencies with axial field strength. In addition, the radial profile of the density perturbation predicted by this model is consistent with the data. Parameter scans show that the dispersion curve is sensitive to the axial field strength and the electron temperature, and the dependence of oscillation frequency with electron temperature matches the experiment. These results consolidate earlier claims that the density and floating potential oscillations are a resistive drift mode, driven by the density gradient. To our knowledge, this is the first detailed physics model of flowing plasmas in the diffusion region away from the RF source. Possible extensions to the model, including temperature nonuniformity and magnetic fieldoscillations, are also discussed. | |
dc.publisher | American Institute of Physics (AIP) | |
dc.rights | http://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 8/12/15). Copyright 2011 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 Physics of Plasmas and may be found at https://doi.org/10.1063/1.3581045 | |
dc.source | Physics of Plasmas | |
dc.subject | Keywords: Axial field; Axial velocity; Confined plasmas; Cylindrical helicon discharge; Density gradients; Density perturbation; Diffusion region; Dispersion curves; Drift mode; Drift waves; Field oscillations; Field strengths; Floating potentials; Flowing plasmas; | |
dc.title | A flowing plasma model to describe drift waves in a cylindrical helicon discharge | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 18 | |
dc.date.issued | 2011-04-29 | |
local.identifier.absfor | 020204 | |
local.identifier.ariespublication | u4695161xPUB2 | |
local.publisher.url | https://www.aip.org/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Chang, Lei, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University | |
local.contributor.affiliation | Hole, Matthew, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University | |
local.contributor.affiliation | Corr, Cormac, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University | |
local.bibliographicCitation.issue | 4 | |
local.bibliographicCitation.startpage | 042106 | |
local.identifier.doi | 10.1063/1.3581045 | |
dc.date.updated | 2016-02-24T11:18:34Z | |
local.identifier.scopusID | 2-s2.0-79955701772 | |
local.identifier.thomsonID | 000290110200008 | |
Collections | ANU Research Publications |
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01_Chang_A_flowing_plasma_model_to_2011.pdf | Published Version | 585.49 kB | Adobe PDF |
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