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Three-Dimensional Numerical Analysis of Shear Flow Effects on MHD Stability in LHD Plasmas

Katsuji ICHIGUCHI^1,2), Yashiro SUZUKI^1,2), Yasushi TODO^1,2), Masahiko SATO¹⁾, Timothée NICOLAS¹⁾, Benjamin A. CARRERAS³⁾, Satoru SAKAKIBARA^1,2), Yuki TAKEMURA¹⁾, Satoshi OHDACHI^1,2) and Yoshiro NARUSHIMA¹⁾

1)

National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan

2)

SOKENDAI, The Graduate University for Advanced Studies, Toki 509-5292, Japan

3)

Universidad Carlos III, 28911 Leganes, Madrid, Spain

(Received 27 November 2015 / Accepted 25 February 2016 / Published 15 April 2016)

Abstract

Effects of poloidal shear flow on the stability of interchange modes in a Large Helical Device (LHD) configuration are numerically studied. Three-dimensional (3D) numerical codes are utilized for the equilibrium and stability calculations. A static equilibrium is employed and a model poloidal flow as a flux function is incorporated in the initial perturbation. The results show that the initially applied flow can suppress the growth of the interchange mode if the flow is sufficiently large.

Copyright (c) 2016 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

MHD stability, shear flow, 3D numerical simulation, heliotron, interchange mode

DOI: 10.1585/pfr.11.2403035

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References

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