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Characterization of a helicon plasma source in low diverging magnetic fields

Lafleur, Trevor; Charles, Christine; Boswell, Roderick

Description

A detailed experimental characterization has been performed of a helicon mode in low nonuniform magnetic fields (B0 < 5 mT) for pressures between 0.04 Pa < p0 < 0.4 Pa and rf powers between 50W < P0 < 400W, using a number of electrostatic probes as well as circuit measurements of the antenna and matching network system. The helicon mode is produced over a narrow range of magnetic field values, where a distinct density peak is formed that becomes broader (and higher) as the power or pressure is...[Show more]

dc.contributor.authorLafleur, Trevor
dc.contributor.authorCharles, Christine
dc.contributor.authorBoswell, Roderick
dc.date.accessioned2015-12-08T22:09:12Z
dc.identifier.issn0022-3727
dc.identifier.urihttp://hdl.handle.net/1885/28923
dc.description.abstractA detailed experimental characterization has been performed of a helicon mode in low nonuniform magnetic fields (B0 < 5 mT) for pressures between 0.04 Pa < p0 < 0.4 Pa and rf powers between 50W < P0 < 400W, using a number of electrostatic probes as well as circuit measurements of the antenna and matching network system. The helicon mode is produced over a narrow range of magnetic field values, where a distinct density peak is formed that becomes broader (and higher) as the power or pressure is increased. The density peak is found to shift to larger magnetic fields for increasing powers or pressures, giving an almost linear relationship between the maximum density and the magnetic field at this maximum density, in agreement with helicon dispersion theory. The density within the peak (>1017 m-3) is more than an order of magnitude larger than that before or after, and is associated with a corresponding peak in the measured antenna resistance, thus showing a larger percentage of the input power is deposited within the plasma.
dc.publisherInstitute of Physics Publishing
dc.sourceJournal of Physics D: Applied Physics
dc.subjectKeywords: Antenna resistance; Dispersion theory; Electrostatic probe; Experimental characterization; Helicon plasma source; Input power; Linear relationships; Matching networks; Maximum density; Nonuniform magnetic fields; Order of magnitude; RF power; Antennas; He
dc.titleCharacterization of a helicon plasma source in low diverging magnetic fields
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume44
dc.date.issued2011
local.identifier.absfor020204 - Plasma Physics; Fusion Plasmas; Electrical Discharges
local.identifier.ariespublicationu4735977xPUB61
local.type.statusPublished Version
local.contributor.affiliationLafleur, Trevor, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationCharles, Christine, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationBoswell, Roderick, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage055202 (11)
local.identifier.doi10.1088/0022-3727/44/5/055202
local.identifier.absseo859999 - Energy not elsewhere classified
dc.date.updated2016-02-24T11:22:33Z
local.identifier.scopusID2-s2.0-79251553757
local.identifier.thomsonID000286222300008
CollectionsANU Research Publications

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