High-beta plasma effects in a low-pressure helicon plasma

Simple item page
dc.contributor.authorCorr, C. S.
dc.contributor.authorBoswell, R. W.
dc.date.accessioned2015-12-02T03:46:05Z
dc.date.available2015-12-02T03:46:05Z
dc.date.issued2007
dc.date.updated2015-12-08T02:40:40Z
dc.description.abstractIn this work, high-beta plasma effects are investigated in a low-pressure helicon plasma source attached to a large volume diffusion chamber. When operating above an input power of 900 W and a magnetic field of 30 G a narrow column of bright blue light due to Ar II radiation is observed along the axis of the diffusion chamber. With this blue mode, the plasma density is axially very uniform in the diffusion chamber; however, the radial profiles are not, suggesting that a large diamagnetic current might be induced. The diamagnetic behavior of the plasma has been investigated by measuring the temporal evolution of the magnetic field Bz and the plasma kinetic pressure when operating in a pulsed discharge mode. It is found that although the electron pressure can exceed the magnetic field pressure by a factor of 2, a complete expulsion of the magnetic field from the plasma interior is not observed. In fact, under our operating conditions with magnetized ions, the maximum diamagnetism observed is 2%. It is observed that the magnetic field displays the strongest change at the plasma centre, which corresponds to the maximum in the plasma kinetic pressure. These results suggest that the magnetic field diffuses into the plasma sufficiently quickly that on a long time scale only a slight perturbation of the magnetic field is ever observed.
dc.format7 pages
dc.identifier.issn1070-664Xen_AU
dc.identifier.urihttp://hdl.handle.net/1885/16969
dc.publisherAmerican Institute of Physics (AIP)
dc.rights© 2007 American Institute of Physics. AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Physics of Plasmas and may be found at http://doi.org/10.1063/1.2802080 http://publishing.aip.org/authors/copyright-reuse http://www.sherpa.ac.uk/romeo/issn/1070-664X Author can archive publisher's version/PDF (Sherpa/Romeo as of 2/12/2015).
dc.sourcePhysics of Plasmas
dc.subjecthigh-beta plasma
dc.subjectlow-pressure helicon plasma source
dc.subjectlarge volume diffusion chamber
dc.subjectinput power of 900 W
dc.subjectmagnetic field of 30 G
dc.subjectAr II radiation
dc.subjectblue light
dc.titleHigh-beta plasma effects in a low-pressure helicon plasma
dc.typeJournal article
dcterms.dateAccepted2007-10-07
local.bibliographicCitation.issue12en_AU
local.bibliographicCitation.lastpage7
local.bibliographicCitation.startpage122503en_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.authoremailcormac.corr@anu.edu.auen_AU
local.contributor.authoruidu4321701en_AU
local.description.notesImported from ARIESen_AU
local.identifier.absfor020204en_AU
local.identifier.ariespublicationu4321701xPUB1en_AU
local.identifier.citationvolume14en_AU
local.identifier.doi10.1063/1.2802080en_AU
local.identifier.essn1089-7674en_AU
local.identifier.scopusID2-s2.0-37549001278
local.identifier.uidSubmittedByu3488905en_AU
local.publisher.urlhttps://www.aip.org/en_AU
local.type.statusPublished Versionen_AU

Downloads

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
01_Corr_High-beta_plasma_effects_in_a_2007.pdf
Size:
599.7 KB
Format:
Adobe Portable Document Format
Description:
Published Version
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
884 B
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

ANU Research Publications

DSpace software copyright © 2002-2024 LYRASIS