Effects of rotating magnetic islands driven by external perturbation fields in the TU-Heliac

Sumio Kitajima, Hajime Umetsu, Mamiko Sasao, Atsushi Okamoto, Takashi Kobuchi, Yutaka Tanaka, Hiroyasu Utoh, Hiroshi Aoyama, Keisuke Iwazaki, Shigeru Inagaki, Masakazu Takayama, Akio Komori, Kiyohiko Nishimura, Yasuhiro Suzuki, Masayuki Yokoyama, Hiromi Takahashi

Research output: Contribution to journalArticle

Abstract

A new method for rotating magnetic islands by external perturbation fields is proposed. In the experiments, perturbation fields were produced using four pairs of cusp field coil, in which alternating currents having a p/2 phase shift flowed. A phase shifter for the coil currents was designed and constructed. The phase difference in the floating potential signals measured using two Langmuir probes confirmed that the magnetic islands rotated in the counterclockwise direction (c/cw). The clockwise (cw) rotation was also observed in the plasma biased by the hot cathode electrode. These experimental results suggest the ability of producing plasma poloidal rotation driven by rotating islands.

Original languageEnglish
Article numberS102
JournalPlasma and Fusion Research
Volume3
DOIs
Publication statusPublished - 2008 Jan 1

Keywords

  • Electrode bias
  • Heliac
  • Magnetic island
  • Perturbation field
  • Poloidal rotation
  • Stellarator

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Kitajima, S., Umetsu, H., Sasao, M., Okamoto, A., Kobuchi, T., Tanaka, Y., Utoh, H., Aoyama, H., Iwazaki, K., Inagaki, S., Takayama, M., Komori, A., Nishimura, K., Suzuki, Y., Yokoyama, M., & Takahashi, H. (2008). Effects of rotating magnetic islands driven by external perturbation fields in the TU-Heliac. Plasma and Fusion Research, 3, [S102]. https://doi.org/10.1585/pfr.3.S102