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Identification of Zonal Flows and Their Spatial Distribution in the TJ-II Stellarator Plasmas

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dc.contributor.authorSarancha, G. A.
dc.contributor.authorEliseev, L. G.
dc.contributor.authorKhabanov, P. O.
dc.contributor.authorKharchev, N. K.
dc.contributor.authorMelnikov, A. V.
dc.contributor.authorМельников, Александр Владимирович
dc.date.accessioned2024-12-25T08:21:37Z
dc.date.available2024-12-25T08:21:37Z
dc.date.issued2022
dc.description.abstractFor low-frequency (0 andlt; f andlt; 20 kHz) plasma electric potential oscillations, measured in two toroidally spaced vertical cross-sections of the TJ-II stellarator (R = 1.5 m, a = 0.22 m, B = 1 T) using double heavy ion beam probe diagnostics, long-range correlations are observed, as well as their toroidal and poloidal symmetry n = m = 0. It is shown that long-range correlations do not have a magnetic or density component. Thus, the low-frequency symmetric structures of the electric potential found in the hot plasma area are zonal flows. Their quantitative characteristic is the square coherence coefficient γ2. For the first time a two-dimensional map of zonal flows (long-range correlations) in the low-density ne = 0.5 × 1019 m–3 regime with ECR heating was plotted and their ballooning structure (dominance γ2 on the low field side of the vessel) was found. The decrease in the level of electrostatic turbulence (0 andlt; f andlt; 300 kHz) observed in this region is consistent with the theoretically predicted suppression of broadband turbulence due to zonal flows. © 2022, Pleiades Publishing, Inc.
dc.identifier.citationIdentification of Zonal Flows and Their Spatial Distribution in the TJ-II Stellarator Plasmas / Sarancha, G.A. [et al.] // JETP Letters. - 2022. - 10.1134/S0021364022601178
dc.identifier.doi10.1134/S0021364022601178
dc.identifier.urihttps://www.doi.org/10.1134/S0021364022601178
dc.identifier.urihttps://www.scopus.com/record/display.uri?eid=2-s2.0-85134296622&origin=resultslist
dc.identifier.urihttp://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000823410400002
dc.identifier.urihttps://openrepository.mephi.ru/handle/123456789/27416
dc.relation.ispartofJETP Letters
dc.titleIdentification of Zonal Flows and Their Spatial Distribution in the TJ-II Stellarator Plasmas
dc.typeArticle
dspace.entity.typePublication
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