Onset of Resistive Interchange Mode in the Large Helical Device

Satoru SAKAKIBARA; Kiyomasa WATANABE; Hiroshi YAMADA; Yoshiro NARUSHIMA; Taiki YAMAGUCHI; Kazuo TOI; Satoshi OHDACHI; Kenji TANAKA; Tokihiko TOKUZAWA; Kazumichi NARIHARA; Kazuo KAWAHATA; Akio KOMORI; LHD Experimental Group

doi:10.1585/pfr.1.049

Letters

Onset of Resistive Interchange Mode in the Large Helical Device

Satoru SAKAKIBARA, Kiyomasa WATANABE, Hiroshi YAMADA, Yoshiro NARUSHIMA, Taiki YAMAGUCHI, Kazuo TOI, Satoshi OHDACHI, Kenji TANAKA, Tokihiko TOKUZAWA, Kazumichi NARIHARA, Kazuo KAWAHATA, Akio KOMORI, LHD Experimental Group

Author information

Satoru SAKAKIBARA
National Institute for Fusion Science
Kiyomasa WATANABE
National Institute for Fusion Science
Hiroshi YAMADA
National Institute for Fusion Science
Yoshiro NARUSHIMA
National Institute for Fusion Science
Taiki YAMAGUCHI
The Graduate University for Advanced Studies
Kazuo TOI
National Institute for Fusion Science
Satoshi OHDACHI
National Institute for Fusion Science
Kenji TANAKA
National Institute for Fusion Science
Tokihiko TOKUZAWA
National Institute for Fusion Science
Kazumichi NARIHARA
National Institute for Fusion Science
Kazuo KAWAHATA
National Institute for Fusion Science
Akio KOMORI
National Institute for Fusion Science
LHD Experimental Group
National Institute for Fusion Science

Keywords: MHD stability, LHD, movable limiter, resistive interchange mode, magnetic Reynolds number

JOURNAL FREE ACCESS

2006 Volume 1 Pages 049

DOI https://doi.org/10.1585/pfr.1.049

Details

Abstract

The relationship between magnetohydrodynamic (MHD) modes and the linear stability boundary has been investigated by controlling the pressure gradient in the Large Helical Device. Edge plasma pressure was varied by inserting a pump limiter into the plasma, and the onsets of MHD modes were determined. A quantitative comparison between mode onsets and a linear stability index of the resistive interchange mode was performed under the condition of a specific magnetic Reynolds number. The experimental results are consistent within a factor of 2 with a rough estimation of the stability boundary of a resistive low-n mode.

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