[Table of Contents]

Plasma and Fusion Research

Volume 8, 1203019 (2013)

Rapid Communications

Relation among ITG Turbulence, Zonal Flows, and Transport in Helical Plasmas
Masanori NUNAMI1,2), Tomo-Hiko WATANABE1,2) and Hideo SUGAMA1,2)
1)
National Institute for Fusion Science, Toki 509-5292, Japan
2)
Graduate University for Advanced Studies, Toki 509-5292, Japan
(Received 26 January 2013 / Accepted 6 February 2013 / Published 27 March 2013)

Abstract

Relation among the ion temperature gradient (ITG) turbulence, zonal flows, and the transport in helical plasmas is investigated by nonlinear gyrokinetic simulations. Local gyrokinetic simulations for helical field configurations are carried out employing various parameters such as the density and temperature gradients and local shears. From the simulation results, we construct a simple model function to represent ion heat diffusivity in terms of the turbulent fluctuations and zonal flow amplitude in helical plasmas.

Keywords

ITG turbulence, gyrokinetic simulation, Large Helical Device

DOI: 10.1585/pfr.8.1203019

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This paper may be cited as follows:

Masanori NUNAMI, Tomo-Hiko WATANABE and Hideo SUGAMA, Plasma Fusion Res. 8, 1203019 (2013).