Effect of Ion Temperature Gradient Driven Turbulence on the Edge-Core Connection for Transient Edge Temperature Sink

Ion temperature gradient (ITG) driven turbulence simulation for a transient edge temperature sink localized in the poloidal plane is performed using a global Landau-fluid code in the electrostatic limit. Pressure perturbations with (m, n) = (±1, 0) are induced by the edge sink, where m and n are pol...

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Bibliographic Details
Published inPlasma and Fusion Research Vol. 9; p. 1203148
Main Author MIYATO, Naoaki
Format Journal Article
LanguageEnglish
Published The Japan Society of Plasma Science and Nuclear Fusion Research 2014
Subjects
ITG turbulence
nonlocal transport
transient edge sink
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Summary:Ion temperature gradient (ITG) driven turbulence simulation for a transient edge temperature sink localized in the poloidal plane is performed using a global Landau-fluid code in the electrostatic limit. Pressure perturbations with (m, n) = (±1, 0) are induced by the edge sink, where m and n are poloidal and toroidal mode numbers, respectively. It was found in the previous simulation [M. Yagi et al., Contrib. Plasma Phys. 54, 363 (2014)] that the nonlinear dynamics of these perturbations are responsible for the nonlocal plasma response/transport connecting edge and core in a toroidal plasma. Present simulation shows, however, that the ITG turbulence in the core region dissipates the large-scale (m, n) = (±1, 0) perturbations and weakens the edge-core connection observed in the previous simulation.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.9.1203148