Mode locking phenomena observed near the stability boundary of the ideal interchange mode of LHD

201234 citationsJournal Article

Authors

Y. Takemura · The Graduate University for Advanced Studies, SOKENDAI

S. Sakakibara · National Institute for Fusion Science

Y. Narushima · National Institute for Fusion Science

M. Okamoto · National Institute Of Technology, Ishikawa College

K. Y. Watanabe · National Institute for Fusion Science

Y. Suzuki · National Institute for Fusion Science

S. Ohdachi

Abstract

Abstract This paper describes the first observation of mode locking phenomena in the Large Helical Device. In the experiments, a rotation of the m / n = 1/1 mode slowed down and stopped when the plasma approached the stability boundary of the ideal interchange mode. The minor collapse was caused by the growth of the mode just after mode locking. The mode before the locking has a radial structure with no inversion around the resonance, which implies that the mode has an interchange-type structure at least before the rotation stops. The location of the mode after the locking depends on that of the error or residual field in reduced error field operations.

Topics & Keywords

Magnetic confinement fusion research Particle accelerators and beam dynamics Superconducting Materials and Applications

UN Sustainable Development Goals

Sustainable cities and communities

Publication Details

Published in: Nuclear Fusion

Volume 52, Issue 10, pp. 102001-102001

DOI: 10.1088/0029-5515/52/10/102001

Field-Weighted Citation Impact: 6.11