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dc.contributor.authorChatthong , Boonyarit
dc.contributor.authorOnjun , Thawatchai
dc.date.accessioned2017-02-09T09:58:19Z
dc.date.available2017-02-09T09:58:19Z
dc.date.issued2015
dc.identifier.citationActa Polytechnica. 2015, vol. 55, no. 4, p. 215-222.
dc.identifier.issn1210-2709 (print)
dc.identifier.issn1805-2363 (online)
dc.identifier.urihttp://hdl.handle.net/10467/67204
dc.description.abstractThe L–H transition in magnetic confinement plasmas is investigated on the basis of concepts of two-field bifurcation and fixed-point stability. A set of heat and particle transport equations with both neoclassical and anomalous effects included is used to study ETB formation and also pedestal width and dynamics. It is found that plasmas can exhibit bifurcation where a sudden jump in the gradients can be achieved at the transition point corresponding to the critical flux. Furthermore, it is found that the transport barrier expands inward, whereby the radial growth of the pedestal initially appears to be superdiffusive but later slows down and stops. In addition, the time of barrier expansion is found to be much longer than the time that plasma takes to evolve from L-mode to H-mode. A sensitivity study is also performed, in which the barrier width is found to be sensitive to various parameters, e.g. heating, transport coefficients and suppression strength.en
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherČeské vysoké učení technické v Prazecs
dc.publisherCzech Technical University in Pragueen
dc.relation.ispartofseriesActa Polytechnica
dc.relation.urihttps://ojs.cvut.cz/ojs/index.php/ap/article/view/2263
dc.rightsCreative Commons Attribution 4.0 International Licenseen
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectplasmaen
dc.subjecttokamaken
dc.subjectfusionen
dc.subjectL–H transitionen
dc.subjectbifurcationen
dc.titleSTUDY OF L–H TRANSITION AND PEDESTAL WIDTH BASED ON TWOFIELD BIFURCATION AND FIXED POINT CONCEPTS
dc.typearticleen
dc.date.updated2017-02-09T09:58:19Z
dc.identifier.doihttps://doi.org/10.14311/AP.2015.55.0215
dc.rights.accessopenAccess
dc.type.statusPeer-reviewed
dc.type.versionpublishedVersion


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Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International License