Coexistence of zonal flows and drift-waves in a cylindrical magnetized plasma

Yoshihiko Nagashima, Sanae Itoh, Shunjiro Shinohara, Masayuki Fukao, akihide fujisawa, Kenichiro Terasaka, Yoshinobu Kawai, Naohiro Kasuya, George R. Tynan, Patrick H. Diamond, Masatoshi Yagi, Inagaki Shigeru, Takuma Yamada, Kimitaka Itoh

研究成果: ジャーナルへの寄稿記事

15 引用 (Scopus)

抄録

Spatiotemporal structures of fluctuations with frequencies lower than the ion cyclotron frequency in a cylindrical magnetized plasma are investigated. Drift-wave and low-frequency zonal flow coexist. Electrostatic potentials of the zonal flow and the drift-wave are distributed widely in radius. The radial wave number profile of the zonal flow has a shear structure at the radial location where the drift-wave has a maximal normalized fluctuation amplitude. On the other hand, the radial wave number profile of the drift-wave shows vortex tilting, resulting in the generation of stationary turbulence Reynolds stress gradient per mass density. The envelope and bispectral analyses indicate significant nonlinear interactions between the zonal flow and the drift-wave.

元の言語英語
記事番号114501
ジャーナルjournal of the physical society of japan
77
発行部数11
DOI
出版物ステータス出版済み - 1 1 2008

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cylindrical plasmas
low frequencies
cyclotron frequency
Reynolds stress
profiles
envelopes
turbulence
vortices
electrostatics
shear
gradients
radii

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

これを引用

Coexistence of zonal flows and drift-waves in a cylindrical magnetized plasma. / Nagashima, Yoshihiko; Itoh, Sanae; Shinohara, Shunjiro; Fukao, Masayuki; fujisawa, akihide; Terasaka, Kenichiro; Kawai, Yoshinobu; Kasuya, Naohiro; Tynan, George R.; Diamond, Patrick H.; Yagi, Masatoshi; Shigeru, Inagaki; Yamada, Takuma; Itoh, Kimitaka.

:: journal of the physical society of japan, 巻 77, 番号 11, 114501, 01.01.2008.

研究成果: ジャーナルへの寄稿記事

Nagashima, Yoshihiko ; Itoh, Sanae ; Shinohara, Shunjiro ; Fukao, Masayuki ; fujisawa, akihide ; Terasaka, Kenichiro ; Kawai, Yoshinobu ; Kasuya, Naohiro ; Tynan, George R. ; Diamond, Patrick H. ; Yagi, Masatoshi ; Shigeru, Inagaki ; Yamada, Takuma ; Itoh, Kimitaka. / Coexistence of zonal flows and drift-waves in a cylindrical magnetized plasma. :: journal of the physical society of japan. 2008 ; 巻 77, 番号 11.
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abstract = "Spatiotemporal structures of fluctuations with frequencies lower than the ion cyclotron frequency in a cylindrical magnetized plasma are investigated. Drift-wave and low-frequency zonal flow coexist. Electrostatic potentials of the zonal flow and the drift-wave are distributed widely in radius. The radial wave number profile of the zonal flow has a shear structure at the radial location where the drift-wave has a maximal normalized fluctuation amplitude. On the other hand, the radial wave number profile of the drift-wave shows vortex tilting, resulting in the generation of stationary turbulence Reynolds stress gradient per mass density. The envelope and bispectral analyses indicate significant nonlinear interactions between the zonal flow and the drift-wave.",
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AU - Nagashima, Yoshihiko

AU - Itoh, Sanae

AU - Shinohara, Shunjiro

AU - Fukao, Masayuki

AU - fujisawa, akihide

AU - Terasaka, Kenichiro

AU - Kawai, Yoshinobu

AU - Kasuya, Naohiro

AU - Tynan, George R.

AU - Diamond, Patrick H.

AU - Yagi, Masatoshi

AU - Shigeru, Inagaki

AU - Yamada, Takuma

AU - Itoh, Kimitaka

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