A study on low-frequency fluctuations using new azimuthal probe array in high-density helicon linear plasma

Kenichiro Terasaka, Shunjiro Shinohara, Yoshihiko Nagashima, Takuma Yamada, Masato Kawaguchi, Takashi Maruta, Inagaki Shigeru, Yoshinobu Kawai, Naohiro Kasuya, Masatoshi Yagi, akihide fujisawa, Kimitaka Itoh, Sanae Itoh

研究成果: ジャーナルへの寄稿記事

20 引用 (Scopus)

抄録

In a high-density plasma produced by helicon waves in a linear device, a change from the coherent to broadband density fluctuations was observed on increasing the magnetic field. The coherent mode exhibited the drift wave features, and a steady oscillation state was observed. When the magnetic field was increased, the fluctuation level increased, and the higher azimuthal Fourier components were excited. When the spectrum became broad at the higher magnetic field, the behavior of the azimuthal structure became complex and changed rapidly with time. The analysis performed using the movable probe array (48ch.-probe) decomposed the short-lived structure into poloidal mode-frequency space and indicated mode-mode coupling in the broad-band spectrum.

元の言語英語
記事番号031
ジャーナルPlasma and Fusion Research
2
DOI
出版物ステータス出版済み - 1 1 2007

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low frequencies
probes
magnetic fields
broadband
coupled modes
plasma density
oscillations

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

これを引用

A study on low-frequency fluctuations using new azimuthal probe array in high-density helicon linear plasma. / Terasaka, Kenichiro; Shinohara, Shunjiro; Nagashima, Yoshihiko; Yamada, Takuma; Kawaguchi, Masato; Maruta, Takashi; Shigeru, Inagaki; Kawai, Yoshinobu; Kasuya, Naohiro; Yagi, Masatoshi; fujisawa, akihide; Itoh, Kimitaka; Itoh, Sanae.

:: Plasma and Fusion Research, 巻 2, 031, 01.01.2007.

研究成果: ジャーナルへの寄稿記事

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abstract = "In a high-density plasma produced by helicon waves in a linear device, a change from the coherent to broadband density fluctuations was observed on increasing the magnetic field. The coherent mode exhibited the drift wave features, and a steady oscillation state was observed. When the magnetic field was increased, the fluctuation level increased, and the higher azimuthal Fourier components were excited. When the spectrum became broad at the higher magnetic field, the behavior of the azimuthal structure became complex and changed rapidly with time. The analysis performed using the movable probe array (48ch.-probe) decomposed the short-lived structure into poloidal mode-frequency space and indicated mode-mode coupling in the broad-band spectrum.",
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T1 - A study on low-frequency fluctuations using new azimuthal probe array in high-density helicon linear plasma

AU - Terasaka, Kenichiro

AU - Shinohara, Shunjiro

AU - Nagashima, Yoshihiko

AU - Yamada, Takuma

AU - Kawaguchi, Masato

AU - Maruta, Takashi

AU - Shigeru, Inagaki

AU - Kawai, Yoshinobu

AU - Kasuya, Naohiro

AU - Yagi, Masatoshi

AU - fujisawa, akihide

AU - Itoh, Kimitaka

AU - Itoh, Sanae

PY - 2007/1/1

Y1 - 2007/1/1

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AB - In a high-density plasma produced by helicon waves in a linear device, a change from the coherent to broadband density fluctuations was observed on increasing the magnetic field. The coherent mode exhibited the drift wave features, and a steady oscillation state was observed. When the magnetic field was increased, the fluctuation level increased, and the higher azimuthal Fourier components were excited. When the spectrum became broad at the higher magnetic field, the behavior of the azimuthal structure became complex and changed rapidly with time. The analysis performed using the movable probe array (48ch.-probe) decomposed the short-lived structure into poloidal mode-frequency space and indicated mode-mode coupling in the broad-band spectrum.

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