[Table of Contents]

Plasma and Fusion Research

Volume 9, 1202066 (2014)

Rapid Communications

Observation of Hysteretic Magnetic Island Response to Resonant Magnetic Perturbation in LHD
Yoshiro NARUSHIMA, Satoru SAKAKIBARA, Satoshi OHDACHI, Kiyomasa WATANABE, Seiya NISHIMURA1), Yasuhiro SUZUKI, Masaru FURUKAWA2), Yuki TAKEMURA, Katsumi IDA, Mikiro YOSHINUMA, Ichihiro YAMADA and LHD Experiment Group
National Institute for Fusion Science, Toki 509-5292, Japan
1)
Kobe City College of Technology, Hyogo 651-2194, Japan
2)
Tottori University, Tottori 680-8552, Japan
(Received 24 February 2014 / Accepted 15 April 2014 / Published 10 June 2014)

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.

Keywords

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

DOI: 10.1585/pfr.9.1202066

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References

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This paper may be cited as follows:

Yoshiro NARUSHIMA, Satoru SAKAKIBARA, Satoshi OHDACHI, Kiyomasa WATANABE, Seiya NISHIMURA, Yasuhiro SUZUKI, Masaru FURUKAWA, Yuki TAKEMURA, Katsumi IDA, Mikiro YOSHINUMA, Ichihiro YAMADA and LHD Experiment Group, Plasma Fusion Res. 9, 1202066 (2014).