High Frequency Alfvén Eigen Modes Observed in LHD

Hiroyuki HIGAKI; Makoto ICHIMURA; Daisuke INOUE; Ken-ichiro NAKAGOME; Yuusuke YAMAGUCHI; Shingo KAKIMOTO; Ryuhei KUMAZAWA; Tetsuo WATARI; Takashi MUTOH; Tetsuo SEKI; Kenji SAITO

doi:10.1585/pfr.1.034

Rapid Communications

High Frequency Alfvén Eigen Modes Observed in LHD

Hiroyuki HIGAKI, Makoto ICHIMURA, Daisuke INOUE, Ken-ichiro NAKAGOME, Yuusuke YAMAGUCHI, Shingo KAKIMOTO, Ryuhei KUMAZAWA, Tetsuo WATARI, Takashi MUTOH, Tetsuo SEKI, Kenji SAITO

著者情報

キーワード: Alfvén eigen mode, Alfvén velocity, neutral beam injection, Large Helical Device

ジャーナルフリー

2006 年 1 巻 p. 034

DOI https://doi.org/10.1585/pfr.1.034

詳細

抄録

Alfvén eigen modes were observed in the Large Helical Device for various magnetic field strengths and plasma densities. It was found that Alfvén eigen modes could be excited at much higher frequencies (0.5 ˜ 2.5 MHz) and higher magnetic fields (1.5 ˜ 2.83 T) than previously reported. A part of the estimated Alfvén velocities (2 ˜ 6 × 10⁷ m/s) exceeded the thermal velocity of injected neutral beams (˜ 4.1 × 10⁶ m/s).

責任著者(Corresponding author)

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