Plasma control by modification of helicon wave propagation in low magnetic fields
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Lafleur, T.; Charles, C.; Boswell, R. W.
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By making use of nonuniform magnetic fields, it is shown experimentally that control of helicon wave propagation can be achieved in a low pressure (0.08 Pa) expanding plasma. The m=1 helicon waves are formed during a direct capacitive to wave mode transition that occurs in a low diverging magnetic field(B₀<3 mT). In this initial configuration, waves are prevented from reaching the downstream region, but slight modifications to the magnetic field allows the axial distance over which waves can...[Show more]
dc.contributor.author | Lafleur, T. | |
---|---|---|
dc.contributor.author | Charles, C. | |
dc.contributor.author | Boswell, R. W. | |
dc.date.accessioned | 2015-12-08T23:45:56Z | |
dc.date.available | 2015-12-08T23:45:56Z | |
dc.identifier.issn | 1070-664X | |
dc.identifier.uri | http://hdl.handle.net/1885/38436 | |
dc.description.abstract | By making use of nonuniform magnetic fields, it is shown experimentally that control of helicon wave propagation can be achieved in a low pressure (0.08 Pa) expanding plasma. The m=1 helicon waves are formed during a direct capacitive to wave mode transition that occurs in a low diverging magnetic field(B₀<3 mT). In this initial configuration, waves are prevented from reaching the downstream region, but slight modifications to the magnetic field allows the axial distance over which waves can propagate to be controlled. By changing the effective propagation distance in this way, significant modification of the density and plasma potential profiles can be achieved, showing that the rf power deposition can be spatially controlled as well. Critical to the modification of the wave propagation behavior is the magnetic field strength (and geometry) near the exit of the plasma source region, which gives electron cyclotron frequencies close to the wave frequency of 13.56 MHz. | |
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 9/12/15). Copyright 2010 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/10.1063/1.3460351 | |
dc.source | Physics of Plasmas | |
dc.subject | Keywords: Axial distance; Downstream region; Electron cyclotron frequency; Expanding plasmas; Helicon waves; Initial configuration; Low magnetic fields; Low pressures; Magnetic field strengths; Nonuniform magnetic fields; Plasma control; Plasma potential; Propagati | |
dc.title | Plasma control by modification of helicon wave propagation in low magnetic fields | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 17 | |
dc.date.issued | 2010-07-23 | |
local.identifier.absfor | 020204 | |
local.identifier.ariespublication | u4735977xPUB36 | |
local.publisher.url | https://www.aip.org/ | |
local.type.status | Published Version | |
local.contributor.affiliation | Lafleur, Trevor, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University | |
local.contributor.affiliation | Charles, Christine, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University | |
local.contributor.affiliation | Boswell, Roderick, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University | |
local.bibliographicCitation.issue | 7 | |
local.bibliographicCitation.startpage | 073508 | |
local.bibliographicCitation.lastpage | 12 | |
local.identifier.doi | 10.1063/1.3460351 | |
local.identifier.absseo | 850399 | |
dc.date.updated | 2016-02-24T11:22:20Z | |
local.identifier.scopusID | 2-s2.0-77955796758 | |
local.identifier.thomsonID | 000281110600060 | |
Collections | ANU Research Publications |
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