Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Rapid Communications
Effect of Ion Temperature Gradient Driven Turbulence on the Edge-Core Connection for Transient Edge Temperature Sink
Naoaki MIYATO
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2014 Volume 9 Pages 1203148

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Abstract

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.

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© 2014 by The Japan Society of Plasma Science and Nuclear Fusion Research
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