Compressed ion temperature gradient turbulence in diverted tokamak edge

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dc.contributor.authorChang, Choong-Seockko
dc.contributor.authorKu, Sko
dc.contributor.authorDiamond, PHko
dc.contributor.authorLin, Zko
dc.contributor.authorParker, Sko
dc.contributor.authorHahm, TSko
dc.contributor.authorSamatova, Nko
dc.date.accessioned2013-03-09T11:17:13Z-
dc.date.available2013-03-09T11:17:13Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2009-05-
dc.identifier.citationPHYSICS OF PLASMAS, v.16, no.5-
dc.identifier.issn1070-664X-
dc.identifier.urihttp://hdl.handle.net/10203/96193-
dc.description.abstractIt is found from a heat-flux-driven full-f gyrokinetic particle simulation that there is ion temperature gradient (ITG) turbulence across an entire L-mode-like edge density pedestal in a diverted tokamak plasma in which the ion temperature gradient is mild without a pedestal structure, hence the normalized ion temperature gradient parameter eta(i)=(d log T(i)/dr)/(d log n/dr) varies strongly from high (>4 at density pedestal top/shoulder) to low (< 2 in the density slope) values. Variation of density and eta(i) is in the same scale as the turbulence correlation length, compressing the turbulence in the density slope region. The resulting ion thermal flux is on the order of experimentally inferred values. The present study strongly suggests that a localized estimate of the ITG-driven chi(i) will not be valid due to the nonlocal dynamics of the compressed turbulence in an L-mode-type density slope. While the thermal transport and the temperature profile saturate quickly, the ExB rotation shows a longer time damping during the turbulence. In addition, a radially in-out mean potential variation is observed.-
dc.languageEnglish-
dc.publisherAMER INST PHYSICS-
dc.subjectGYROKINETIC PARTICLE SIMULATION-
dc.subjectPOLOIDAL ELECTRIC-FIELD-
dc.subjectNEOCLASSICAL TRANSPORT-
dc.subjectZONAL FLOWS-
dc.subjectPLASMA-
dc.subjectGEOMETRY-
dc.subjectROTATION-
dc.titleCompressed ion temperature gradient turbulence in diverted tokamak edge-
dc.typeArticle-
dc.identifier.wosid000266500600101-
dc.identifier.scopusid2-s2.0-66449123034-
dc.type.rimsART-
dc.citation.volume16-
dc.citation.issue5-
dc.citation.publicationnamePHYSICS OF PLASMAS-
dc.identifier.doi10.1063/1.3099329-
dc.contributor.localauthorChang, Choong-Seock-
dc.contributor.nonIdAuthorDiamond, PH-
dc.contributor.nonIdAuthorLin, Z-
dc.contributor.nonIdAuthorParker, S-
dc.contributor.nonIdAuthorHahm, TS-
dc.contributor.nonIdAuthorSamatova, N-
dc.type.journalArticleArticle; Proceedings Paper-
dc.subject.keywordAuthorplasma boundary layers-
dc.subject.keywordAuthorplasma density-
dc.subject.keywordAuthorplasma instability-
dc.subject.keywordAuthorplasma simulation-
dc.subject.keywordAuthorplasma toroidal confinement-
dc.subject.keywordAuthorplasma transport processes-
dc.subject.keywordAuthorplasma turbulence-
dc.subject.keywordAuthorTokamak devices-
dc.subject.keywordPlusGYROKINETIC PARTICLE SIMULATION-
dc.subject.keywordPlusPOLOIDAL ELECTRIC-FIELD-
dc.subject.keywordPlusNEOCLASSICAL TRANSPORT-
dc.subject.keywordPlusZONAL FLOWS-
dc.subject.keywordPlusPLASMA-
dc.subject.keywordPlusGEOMETRY-
dc.subject.keywordPlusROTATION-
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