Plasma and Fusion Research

Volume 13, 3402037 (2018)

Regular Articles


Comparison of Rotation of Interchange Mode in Large Helical Device Plasmas with Various Ion Species
Yuki TAKEMURA1,2), Kiyomasa WATANABE1), Satoru SAKAKIBARA1,2), Satoshi OHDACHI1,2), Yasuhiro SUZUKI1,2), Katsumi IDA1,2), Mikiro YOSHINUMA1,2), Ichihiro YAMADA1) and LHD Experiment Group1)
1)
National Institute for Fusion Science, National Institutes of Natural Sciences, Toki 509-5292, Japan
2)
SOKENDAI (the Graduate University for Advanced Studies), Toki 509-5292, Japan
(Received 28 December 2017 / Accepted 15 March 2018 / Published 10 May 2018)

Abstract

In order to clarify the mass effect and the atomic number effect on the rotation of the interchange MHD mode, the relationship between the mode rotation and the plasma rotation in hydrogen-rich plasmas is compared with that in helium-rich plasmas and deuterium-rich plasmas. In all cases, the frequency of the m/n = 1/1 resistive interchange mode is almost the same as the sum of the E × B rotational frequency and the electron diamagnetic rotational frequency at the ι/2π = 1 resonant surface. This result indicates that the rotation of the resistive interchange mode does not depend on the ion species of which the plasma consists.


Keywords

MHD instability, interchange mode, mode frequency, plasma rotation, LHD

DOI: 10.1585/pfr.13.3402037


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