[Table of Contents]

Plasma and Fusion Research

Volume 10, 3403018 (2015)

Regular Articles

Three-Dimensional Numerical Analysis of Ion Diamagnetic Effects on Interchange Mode in Heliotron Plasmas
Timothee NICOLAS1), Katsuji ICHIGUCHI1,2), Masahiko SATO1), Yasushi TODO1,2), Yasuhiro SUZUKI1,2), Akihiro ISHIZAWA1,2) and Satoru SAKAKIBARA1,2)
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
2)
The Graduate University of Advanced Study, SOKENDAI, Toki 509-5292, Japan
(Received 25 November 2014 / Accepted 28 January 2015 / Published 16 April 2015)

Abstract

The influence of the ion diamagnetic flow on the resistive interchange mode including dissipation in the Large Helical Device (LHD) plasmas is investigated with three-dimensional (3D) magnetohydrodynamic (MHD) codes. The contribution on the interchange mode stability depends on the difference between the ideal growth rate γI and the single fluid growth rate including resistivity and dissipation γD. When γD is close to γI, the ion diamagnetic effects are stabilizing. In this case the stabilization can be approximated by an analytic formula by analogy with the case without dissipation. When γD is far from γI the ion diamagnetic effects are destabilizing.

Keywords

heliotron, Large Helical Device, magnetohydrodynamics, interchange mode, flow, two-fluid effect

DOI: 10.1585/pfr.10.3403018

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This paper may be cited as follows:

Timothee NICOLAS, Katsuji ICHIGUCHI, Masahiko SATO, Yasushi TODO, Yasuhiro SUZUKI, Akihiro ISHIZAWA and Satoru SAKAKIBARA, Plasma Fusion Res. 10, 3403018 (2015).