Observation of Hysteretic Magnetic Island Response to Resonant Magnetic Perturbation in LHD

Yoshiro NARUSHIMA; Satoru SAKAKIBARA; Satoshi OHDACHI; Kiyomasa WATANABE; Seiya NISHIMURA; Yasuhiro SUZUKI; Masaru FURUKAWA; Yuki TAKEMURA; Katsumi IDA; Mikiro YOSHINUMA; Ichihiro YAMADA; LHD Experiment Group

doi:10.1585/pfr.9.1202066

Rapid Communications

Observation of Hysteretic Magnetic Island Response to Resonant Magnetic Perturbation in LHD

Yoshiro NARUSHIMA, Satoru SAKAKIBARA, Satoshi OHDACHI, Kiyomasa WATANABE, Seiya NISHIMURA, Yasuhiro SUZUKI, Masaru FURUKAWA, Yuki TAKEMURA, Katsumi IDA, Mikiro YOSHINUMA, Ichihiro YAMADA, LHD Experiment Group

Author information

Yoshiro NARUSHIMA
National Institute for Fusion Science
Satoru SAKAKIBARA
National Institute for Fusion Science
Satoshi OHDACHI
National Institute for Fusion Science
Kiyomasa WATANABE
National Institute for Fusion Science
Seiya NISHIMURA
Kobe City College of Technology
Yasuhiro SUZUKI
National Institute for Fusion Science
Masaru FURUKAWA
Tottori University
Yuki TAKEMURA
National Institute for Fusion Science
Katsumi IDA
National Institute for Fusion Science
Mikiro YOSHINUMA
National Institute for Fusion Science
Ichihiro YAMADA
National Institute for Fusion Science
LHD Experiment Group
National Institute for Fusion Science

Keywords: magnetic island, resonant magnetic perturbation, hysteresis, Large Helical Device

JOURNAL FREE ACCESS

2014 Volume 9 Pages 1202066

DOI https://doi.org/10.1585/pfr.9.1202066

Details

Abstract

The hysteretic magnetic island response to an externally applied resonant magnetic perturbation (RMP) field is observed in the LHD. Thresholds of the amplitude of the RMP for the growth/healing transition of the magnetic island differ. In the case that the RMP is ramped up, that field is initially shielded and the magnetic island is healed. After that, when the increasing RMP exceeds a threshold, that field penetrates into the plasma and the magnetic island appears. In the case that the RMP is ramped down, the threshold of the RMP for island healing is smaller than that for growth.

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