[Table of Contents]

Plasma and Fusion Research

Volume 6, 2402134 (2011)

Regular Articles

Study of Magnetic Island Using a 3D MHD Equilibrium Calculation Code
Yasuhiro SUZUKI1,2), Satoru SAKAKIBARA1,2), Kiyomasa WATANABE1,2), Yoshiro NARUSHIMA1,2), Satoshi OHDACHI1,2), Satoshi YAMAMOTO3), Hiroyuki OKADA3) and LHD experiment group
1)
National Institute for Fusion Science, Toki 509-5292, Japan
2)
Graduate University for Advanced Studies (SOKENDAI), Toki 509-5292, Japan
3)
Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
(Received 13 February 2011 / Accepted 31 May 2011 / Published 21 October 2011)

Abstract

Coupling the magnetic diagnostics and a 3D MHD equilibrium calculation code, the magnetic island is studied in the Large Helical Device (LHD) experiment. In an experiment, the collapse in the plasma core was observed in a configuration, which has large magnetic island produced by external perturbation coils. At the collapse, the temperatur profile was flattened. This suggests the magnetic island evolved. The magnetic island was observed by the magnetic diagnostics. The magnetic diagnostics also suggests evolving the magnetic island. A 3D MHD equilibrium is caluclated by the 3D MHD equilibrium code then signals of the magnetic diagnostics are simulated. Since the comparison of observed and calculated signals is comparable, the magnetic island in calculated equilibrium is similar to one of the experiment.

Keywords

magnetic island, MHD equilibrium, magnetic diagnostics, HINT2, JDIA

DOI: 10.1585/pfr.6.2402134

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This paper may be cited as follows:

Yasuhiro SUZUKI, Satoru SAKAKIBARA, Kiyomasa WATANABE, Yoshiro NARUSHIMA, Satoshi OHDACHI, Satoshi YAMAMOTO, Hiroyuki OKADA and LHD experiment group, Plasma Fusion Res. 6, 2402134 (2011).