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Formation and structure of transport barriers during confinement transitions in toroidal plasma

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Punzmann, Horst; Shats, Michael

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Density pedestal formation is studied experimentally during spontaneous low-to-high confinement transitions in the H-1 heliac. Poloidally extended potential structures, or zonal flows, seem to play the major role both in the spatial structure and in the temporal evolution of the pedestal formation. Zonal flows transiently generate radially localized maxima in the radial electric-field shear in L mode which coincides with the radial location of the pedestal in H mode.

dc.contributor.authorPunzmann, Horst
dc.contributor.authorShats, Michael
dc.date.accessioned2009-09-17T00:27:54Z
dc.date.accessioned2010-12-20T06:05:10Z
dc.date.available2009-09-17T00:27:54Z
dc.date.available2010-12-20T06:05:10Z
dc.identifier.citationPhysical Review Letters 93.12 (2004): 125003/1-4
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.urihttp://hdl.handle.net/10440/866
dc.identifier.urihttp://digitalcollections.anu.edu.au/handle/10440/866
dc.description.abstractDensity pedestal formation is studied experimentally during spontaneous low-to-high confinement transitions in the H-1 heliac. Poloidally extended potential structures, or zonal flows, seem to play the major role both in the spatial structure and in the temporal evolution of the pedestal formation. Zonal flows transiently generate radially localized maxima in the radial electric-field shear in L mode which coincides with the radial location of the pedestal in H mode.
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). ©2004 The American Physical Society
dc.sourcePhysical Review Letters
dc.source.urihttp://prola.aps.org/abstract/PRL/v93/i12/e125003
dc.subjectKeywords: Carrier concentration; Electric field effects; Electron transitions; Error correction; Magnetic field effects; Magnetic flux; Natural frequencies; Spectroscopic analysis; Transport properties; Potential spectrum; Spatiotemporal structures; Toroidal plasma
dc.titleFormation and structure of transport barriers during confinement transitions in toroidal plasma
dc.typeJournal article
local.description.refereedYes
local.identifier.citationvolume93
dc.date.issued2004-09-15
local.identifier.absfor020204
local.identifier.ariespublicationMigratedxPub15263
local.type.statusPublished Version
local.contributor.affiliationPunzmann, Horst, Research School of Physical Sciences and Engineering, Plasma Research Laboratory
local.contributor.affiliationShats, Michael, Research School of Physical Sciences and Engineering, Plasma Research Laboratory
local.bibliographicCitation.issue12
local.bibliographicCitation.startpage125003-1-4
local.identifier.doi10.1103/PhysRevLett.93.125003
dc.date.updated2015-12-12T08:11:08Z
local.identifier.scopusID2-s2.0-19644380352
CollectionsANU Research Publications

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