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Zonal flows and long-distance correlations during the formation of the edge shear layer in the TJ-II stellarator

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.affiliation.grupoinvUC3M. Grupo de Investigación: Física de Plasmases
dc.contributor.authorCalvo, Iván
dc.contributor.authorCarreras, Benjamín A.
dc.contributor.authorGarcía Gonzalo, Luis
dc.contributor.authorPedrosa, M. A.
dc.contributor.authorHidalgo, Carlos
dc.date.accessioned2010-03-17T14:19:34Z
dc.date.available2010-03-17T14:19:34Z
dc.date.issued2009-06
dc.description12 pages, 7 figures.-- PACS nrs.: 52.55.Hc, 52.30.-q, 52.40.Hf, 52.25.Fi, 52.35.Ra, 52.25.Gj.-- ArXiv pre-print available at: http://arxiv.org/abs/0904.2551
dc.description.abstractA theoretical interpretation is given for the observed long-distance correlations in potential fluctuations in TJ-II. The value of the correlation increases above the critical point of the transition for the emergence of the plasma edge shear flow layer. Mean (i.e. surface averaged, zero-frequency) sheared flows cannot account for the experimental results. A model consisting of four envelope equations for the fluctuation level, the mean flow shear, the zonal flow amplitude shear and the averaged pressure gradient is proposed. It is shown that the presence of zonal flows is essential to reproduce the main features of the experimental observations.
dc.description.sponsorshipPart of this research was sponsored by the Dirección General de Investigación of Spain under project ENE2006-15244-C03-01. BAC acknowledges the financial support of Universidad Carlos III and Banco Santander through a Cátedra de Excelencia.
dc.description.statusPublicado
dc.format.mimetypeapplication/pdf
dc.identifier.bibliographicCitationPlasma Physics and Controlled Fusion, 2009, vol. 51, n. 6, id 065007
dc.identifier.doi10.1088/0741-3335/51/6/065007
dc.identifier.issn0741-3335 (Print)
dc.identifier.issn1361-6587 (Online)
dc.identifier.urihttps://hdl.handle.net/10016/7414
dc.language.isoeng
dc.publisherIOP Publishing
dc.relation.publisherversionhttp://dx.doi.org/10.1088/0741-3335/51/6/065007
dc.rights© IOP Publishing
dc.rights.accessRightsopen access
dc.subject.ecienciaFísica
dc.subject.other[PACS] Stellarators, torsatrons, heliacs, bumpy tori, and other toroidal confinement devices
dc.subject.other[PACS] Plasma dynamics and flow
dc.subject.other[PACS] Plasma-material interactions; boundary layer effects
dc.subject.other[PACS] Transport properties
dc.subject.other[PACS] Plasma turbulence
dc.subject.other[PACS] Fluctuation and chaos phenomena
dc.titleZonal flows and long-distance correlations during the formation of the edge shear layer in the TJ-II stellarator
dc.typeresearch article*
dc.type.reviewPeerReviewed
dspace.entity.typePublication
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