Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma

Yoshihiko Nagashima, Sanae I. Itoh, Shunjiro Shinohara, Masayuki Fukao, Akihide Fujisawa, Kenichiro Terasaka, Yoshinobu Kawai, George R. Tynan, Patrick H. Diamond, Masatoshi Yagi, Shigeru Inagaki, Takuma Yamada, Kimitaka Itoh

研究成果: ジャーナルへの寄稿記事

43 引用 (Scopus)

抄録

Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via "channel of the azimuthally symmetric sheared radial electric field" in spectral space as well as real space are discovered.

元の言語英語
記事番号020706
ジャーナルPhysics of Plasmas
16
発行部数2
DOI
出版物ステータス出版済み - 2009

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oscillations
electric fields
energy transfer
Reynolds stress
modulation
interactions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

これを引用

Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma. / Nagashima, Yoshihiko; Itoh, Sanae I.; Shinohara, Shunjiro; Fukao, Masayuki; Fujisawa, Akihide; Terasaka, Kenichiro; Kawai, Yoshinobu; Tynan, George R.; Diamond, Patrick H.; Yagi, Masatoshi; Inagaki, Shigeru; Yamada, Takuma; Itoh, Kimitaka.

:: Physics of Plasmas, 巻 16, 番号 2, 020706, 2009.

研究成果: ジャーナルへの寄稿記事

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abstract = "Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via {"}channel of the azimuthally symmetric sheared radial electric field{"} in spectral space as well as real space are discovered.",
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T1 - Observation of the parametric-modulational instability between the drift-wave fluctuation and azimuthally symmetric sheared radial electric field oscillation in a cylindrical laboratory plasma

AU - Nagashima, Yoshihiko

AU - Itoh, Sanae I.

AU - Shinohara, Shunjiro

AU - Fukao, Masayuki

AU - Fujisawa, Akihide

AU - Terasaka, Kenichiro

AU - Kawai, Yoshinobu

AU - Tynan, George R.

AU - Diamond, Patrick H.

AU - Yagi, Masatoshi

AU - Inagaki, Shigeru

AU - Yamada, Takuma

AU - Itoh, Kimitaka

PY - 2009

Y1 - 2009

N2 - Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via "channel of the azimuthally symmetric sheared radial electric field" in spectral space as well as real space are discovered.

AB - Observation of the parametric-modulational interaction between the drift-wave fluctuation (7-8 kHz) and azimuthally symmetric sheared radial electric field structure (∼0.4 kHz) in a cylindrical laboratory plasma is presented. Oscillation of the sheared radial electric field is synchronized at modulations of the radial wave number and Reynolds stress per mass density of the drift-wave spectrum. Bispectral analysis at the location where the sheared radial electric field has finite radial wave numbers shows that nonlinear energy transfers from the drift wave to the sheared radial electric field occur. Nonlocal energy transfers of fluctuations via "channel of the azimuthally symmetric sheared radial electric field" in spectral space as well as real space are discovered.

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