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Experimental evidence of a double layer in a large volume helicon reactor

Sutherland, Orson; Charles, Christine; Plihon, N; Boswell, Rod

Description

The self-consistently generated current-free electric double layer (DL) is shown to scale up with the source tube diameter and appears not to be affected by rf driving frequency and changes in reactor geometry. This Letter presents the first simultaneous measurements of local plasma potential and beam energy as a function of axial position. The DL is shown to be no more than 5 mm thick (20 D lengths) and positioned just downstream of the maximum in the magnetic field gradient. Furthermore, its...[Show more]

dc.contributor.authorSutherland, Orson
dc.contributor.authorCharles, Christine
dc.contributor.authorPlihon, N
dc.contributor.authorBoswell, Rod
dc.date.accessioned2009-09-16T04:40:13Z
dc.date.accessioned2010-12-20T06:02:53Z
dc.date.available2009-09-16T04:40:13Z
dc.date.available2010-12-20T06:02:53Z
dc.identifier.citationPhysical Review Letters 95.20 (2005): 205002/1-4
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.urihttp://hdl.handle.net/10440/858
dc.identifier.urihttp://digitalcollections.anu.edu.au/handle/10440/858
dc.description.abstractThe self-consistently generated current-free electric double layer (DL) is shown to scale up with the source tube diameter and appears not to be affected by rf driving frequency and changes in reactor geometry. This Letter presents the first simultaneous measurements of local plasma potential and beam energy as a function of axial position. The DL is shown to be no more than 5 mm thick (20 D lengths) and positioned just downstream of the maximum in the magnetic field gradient. Furthermore, its position relative to the magnetic field is observed to be invariant as the magnetic field is translated axially. Measurements of the potential drop across the DL are presented for pressures down to 0.09 mTorr and the DL strength (ϕDL/Te) is determined to be between 5 and 7.
dc.format4 pages
dc.publisherAmerican Physical Society
dc.rightshttp://www.sherpa.ac.uk/romeo/index.php "Author can archive pre-print (ie pre-refereeing) … post-print (ie final draft post-refereeing) … [and] publisher's version/PDF. Link to publisher version … [and] Copyright notice required. Publisher's version/PDF can be used on … employers web site." - from SHERPA/RoMEO site (as at 25/02/10). ©2005 The American Physical Society
dc.sourcePhysical Review Letters
dc.source.urihttp://prola.aps.org/abstract/PRL/v95/i20/e205002
dc.subjectKeywords: Beam energy; Magnetic field gradient; Plasma potential; Reactor geometry; Computational geometry; Electric currents; Helicons; Magnetic fields; Natural frequencies; Plasmas; Electric reactors
dc.titleExperimental evidence of a double layer in a large volume helicon reactor
dc.typeJournal article
local.description.refereedYes
local.identifier.citationvolume95
dc.date.issued2005-11-07
local.identifier.absfor020204
local.identifier.ariespublicationMigratedxPub11451
local.type.statusPublished Version
local.contributor.affiliationSutherland, Orson, Research School of Physical Sciences and Engineering, Plasma Research Laboratory
local.contributor.affiliationCharles, Christine, Research School of Physical Sciences and Engineering, Plasma Research Laboratory
local.contributor.affiliationPlihon, N, Research School of Physical Sciences and Engineering, Plasma Research Laboratory
local.contributor.affiliationBoswell, Rod, Research School of Physical Sciences and Engineering, Plasma Research
local.bibliographicCitation.issue205002
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage4
local.identifier.doi10.1103/PhysRevLett.95.205002
dc.date.updated2015-12-12T07:20:16Z
local.identifier.scopusID2-s2.0-28844448558
CollectionsANU Research Publications

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