Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device

T. Ido; A. Shimizu; M. Nishiura; S. Nakamura; S. Kato; H. Nakano; Y. Yoshimura; K. Toi; K. Ida; M. Yoshinuma; S. Satake; F. Watanabe; S. Morita; M. Goto; K. Itoh; S. Kubo; T. Shimozuma; H. Igami; H. Takahashi; I. Yamada; K. Narihara

doi:10.1088/0029-5515/51/7/073046

Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device

T. Ido, A. Shimizu, M. Nishiura, S. Nakamura, S. Kato, H. Nakano, Y. Yoshimura, K. Toi, K. Ida, M. Yoshinuma, S. Satake, F. Watanabe, S. Morita, M. Goto, K. Itoh, S. Kubo, T. Shimozuma, H. Igami, H. Takahashi, I. YamadaK. Narihara

研究成果: ジャーナルへの寄稿 › 学術誌 › 査読

34 被引用数 (Scopus)

抄録

Geodesic acoustic modes (GAM) driven by energetic particles are observed in the Large Helical Device (LHD) by a heavy ion beam probe. The GAM localizes near the magnetic axis. It is confirmed that the energetic-particle-induced GAM is accompanied by an electrostatic potential fluctuation and radial electric field fluctuation. The amplitude of the potential fluctuation is several hundred volts, and it is much larger than the potential fluctuation associated with turbulence-induced GAMs observed in the edge region in tokamak plasmas. The energetic-particle-induced GAM modulates the amplitude of the density fluctuation in a high-frequency range. The observed GAM frequency is constant at the predicted GAM frequency in plasmas with reversed magnetic shear. On the other hand, it shifts upwards from the predicted GAM frequency in plasmas with monotonic magnetic shear.

本文言語	英語
論文番号	073046
ジャーナル	Nuclear Fusion
巻	51
号	7
DOI	https://doi.org/10.1088/0029-5515/51/7/073046
出版ステータス	出版済み - 7月 1 2011
外部発表	はい

!!!All Science Journal Classification (ASJC) codes

核物理学および高エネルギー物理学
凝縮系物理学

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10.1088/0029-5515/51/7/073046

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引用スタイル

Ido, T., Shimizu, A., Nishiura, M., Nakamura, S., Kato, S., Nakano, H., Yoshimura, Y., Toi, K., Ida, K., Yoshinuma, M., Satake, S., Watanabe, F., Morita, S., Goto, M., Itoh, K., Kubo, S., Shimozuma, T., Igami, H., Takahashi, H., ... Narihara, K. (2011). Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device. Nuclear Fusion, 51(7), [073046]. https://doi.org/10.1088/0029-5515/51/7/073046

Ido, T , Shimizu, A, Nishiura, M, Nakamura, S, Kato, S, Nakano, H, Yoshimura, Y, Toi, K, Ida, K, Yoshinuma, M, Satake, S, Watanabe, F, Morita, S, Goto, M, Itoh, K, Kubo, S, Shimozuma, T, Igami, H, Takahashi, H, Yamada, I & Narihara, K 2011, 'Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device', Nuclear Fusion, vol. 51, no. 7, 073046. https://doi.org/10.1088/0029-5515/51/7/073046

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title = "Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device",

abstract = "Geodesic acoustic modes (GAM) driven by energetic particles are observed in the Large Helical Device (LHD) by a heavy ion beam probe. The GAM localizes near the magnetic axis. It is confirmed that the energetic-particle-induced GAM is accompanied by an electrostatic potential fluctuation and radial electric field fluctuation. The amplitude of the potential fluctuation is several hundred volts, and it is much larger than the potential fluctuation associated with turbulence-induced GAMs observed in the edge region in tokamak plasmas. The energetic-particle-induced GAM modulates the amplitude of the density fluctuation in a high-frequency range. The observed GAM frequency is constant at the predicted GAM frequency in plasmas with reversed magnetic shear. On the other hand, it shifts upwards from the predicted GAM frequency in plasmas with monotonic magnetic shear.",

author = "T. Ido and A. Shimizu and M. Nishiura and S. Nakamura and S. Kato and H. Nakano and Y. Yoshimura and K. Toi and K. Ida and M. Yoshinuma and S. Satake and F. Watanabe and S. Morita and M. Goto and K. Itoh and S. Kubo and T. Shimozuma and H. Igami and H. Takahashi and I. Yamada and K. Narihara",

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doi = "10.1088/0029-5515/51/7/073046",

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T1 - Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device

AU - Ido, T.

AU - Shimizu, A.

AU - Nishiura, M.

AU - Nakamura, S.

AU - Kato, S.

AU - Nakano, H.

AU - Yoshimura, Y.

AU - Toi, K.

AU - Ida, K.

AU - Yoshinuma, M.

AU - Satake, S.

AU - Watanabe, F.

AU - Morita, S.

AU - Goto, M.

AU - Itoh, K.

AU - Kubo, S.

AU - Shimozuma, T.

AU - Igami, H.

AU - Takahashi, H.

AU - Yamada, I.

AU - Narihara, K.

PY - 2011/7/1

Y1 - 2011/7/1

N2 - Geodesic acoustic modes (GAM) driven by energetic particles are observed in the Large Helical Device (LHD) by a heavy ion beam probe. The GAM localizes near the magnetic axis. It is confirmed that the energetic-particle-induced GAM is accompanied by an electrostatic potential fluctuation and radial electric field fluctuation. The amplitude of the potential fluctuation is several hundred volts, and it is much larger than the potential fluctuation associated with turbulence-induced GAMs observed in the edge region in tokamak plasmas. The energetic-particle-induced GAM modulates the amplitude of the density fluctuation in a high-frequency range. The observed GAM frequency is constant at the predicted GAM frequency in plasmas with reversed magnetic shear. On the other hand, it shifts upwards from the predicted GAM frequency in plasmas with monotonic magnetic shear.

AB - Geodesic acoustic modes (GAM) driven by energetic particles are observed in the Large Helical Device (LHD) by a heavy ion beam probe. The GAM localizes near the magnetic axis. It is confirmed that the energetic-particle-induced GAM is accompanied by an electrostatic potential fluctuation and radial electric field fluctuation. The amplitude of the potential fluctuation is several hundred volts, and it is much larger than the potential fluctuation associated with turbulence-induced GAMs observed in the edge region in tokamak plasmas. The energetic-particle-induced GAM modulates the amplitude of the density fluctuation in a high-frequency range. The observed GAM frequency is constant at the predicted GAM frequency in plasmas with reversed magnetic shear. On the other hand, it shifts upwards from the predicted GAM frequency in plasmas with monotonic magnetic shear.

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Potential fluctuation associated with the energetic-particle-induced geodesic acoustic mode in the Large Helical Device

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!!!All Science Journal Classification (ASJC) codes

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