[Table of Contents]

Plasma and Fusion Research

Volume 9, 1203148 (2014)

Rapid Communications


Effect of Ion Temperature Gradient Driven Turbulence on the Edge-Core Connection for Transient Edge Temperature Sink
Naoaki MIYATO
Japan Atomic Energy Agency, 2-116 Omotedate, Obuchi, Rokkasho, Aomori 039-3212, Japan
(Received 13 November 2014 / Accepted 2 December 2014 / Published 26 December 2014)

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.


Keywords

ITG turbulence, transient edge sink, nonlocal transport

DOI: 10.1585/pfr.9.1203148


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This paper may be cited as follows:

Naoaki MIYATO, Plasma Fusion Res. 9, 1203148 (2014).