Plasma and Fusion Research
Volume 1, 034 (2006)
Rapid Communications
- Plasma Research Center, University of Tsukuba
- 1)
- National Institute for Fusion Science
Abstract
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).
Keywords
Alfvén eigen mode, Alfvén velocity, neutral beam injection, Large Helical Device
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References
- [1] G.A. Cottrell and R.O. Dendy, Phys. Rev. Lett. 60, 33 (1988).
- [2] S. Yamamoto, K. Toi, N. Nakajima et. al., Phys. Rev. Lett. 91, 245001 (2003).
- [3] S. Yamamoto, K. Toi, S. Ohdachi et. al., Nucl. Fusion 45, 326 (2005).
This paper may be cited as follows:
Hiroyuki HIGAKI, Makoto ICHIMURA, Daisuke INOUE, Ken-ichiro NAKAGOME, Yuusuke YAMAGUCHI, Shingo KAKIMOTO, Ryuhei KUMAZAWA, Tetsuo WATARI, Takashi MUTOH, Tetsuo SEKI and Kenji SAITO, Plasma Fusion Res. 1, 034 (2006).