[Table of Contents]

Plasma and Fusion Research

Volume 5, S2023 (2010)

Regular Articles

Study of the Effect of the Helical Ripple Transport on the Confinement via Zonal Flows in Helical Plasmas
Shinichiro TODA and Kimitaka ITOH
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
(Received 7 December 2009 / Accepted 13 March 2010 / Published 10 December 2010)

Abstract

The role of the effective helical ripple in the helical plasma confinement is analyzed using the transport code via the effect of zonal flows. One-dimensional coupled transport equations are calculated in the different cases of the effective helical ripple. The reduction of the effective helical ripple ratio lowers the criterion for the excitation of zonal flows in helical plasmas. It is demonstrated that the reduction of the turbulent transport can be obtained in the case of the smaller neoclassical transport when zonal flows are excited.

Keywords

plasma confinement, helical plasma, effective helical ripple, zonal flow, radial electric field

DOI: 10.1585/pfr.5.S2023

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This paper may be cited as follows:

Shinichiro TODA and Kimitaka ITOH, Plasma Fusion Res. 5, S2023 (2010).