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

doi:10.1585/pfr.3.S102

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

Division of Nuclear Fusion Dynamics

Research output: Contribution to journal › Article › peer-review

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 language	English
Article number	S102
Journal	Plasma and Fusion Research
Volume	3
DOIs	https://doi.org/10.1585/pfr.3.S102
Publication status	Published - Jan 1 2008

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1585/pfr.3.S102

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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

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title = "Effects of rotating magnetic islands driven by external perturbation fields in the TU-Heliac",

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.",

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

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doi = "10.1585/pfr.3.S102",

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T1 - Effects of rotating magnetic islands driven by external perturbation fields in the TU-Heliac

AU - Kitajima, Sumio

AU - Umetsu, Hajime

AU - Sasao, Mamiko

AU - Okamoto, Atsushi

AU - Kobuchi, Takashi

AU - Tanaka, Yutaka

AU - Utoh, Hiroyasu

AU - Aoyama, Hiroshi

AU - Iwazaki, Keisuke

AU - Inagaki, Shigeru

AU - Takayama, Masakazu

AU - Komori, Akio

AU - Nishimura, Kiyohiko

AU - Suzuki, Yasuhiro

AU - Yokoyama, Masayuki

AU - Takahashi, Hiromi

PY - 2008/1/1

Y1 - 2008/1/1

N2 - 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.

AB - 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.

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

Abstract

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