Turbulent transport reduction induced by transition on radial electric field shear and curvature through amplitude and cross-phase in torus plasma

T. Kobayashi, K. Itoh, T. Ido, K. Kamiya, Sanae Itoh, Y. Miura, Yoshihiko Nagashima, akihide fujisawa, Inagaki Shigeru, K. Ida

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

Spatiotemporal evolutions of radial electric field and turbulence are measured simultaneously in the H-mode transition, which is a prototypical example of turbulence structure formation in higherature plasmas. In the dynamical phase where transport barrier is established abruptly, the time-space-frequency-resolved turbulent particle flux is obtained. Here we report the validation of the mechanism of transport barrier formation quantitatively. It is found that the particle flux is suppressed predominantly by reducing density fluctuation amplitude and cross phase between density fluctuation and potential fluctuation. Both radial electric field shear and curvature are responsible for the amplitude suppression as was predicted by theory. Turbulence amplitude reduction immediately responds to the growth of the radial electric field non-uniformity and saturates, while cross phase continuously approaches zero.

元の言語英語
記事番号14971
ジャーナルScientific reports
7
発行部数1
DOI
出版物ステータス出版済み - 12 1 2017

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turbulence
curvature
shear
flux (rate)
electric fields
nonuniformity
retarding

All Science Journal Classification (ASJC) codes

  • General

これを引用

Turbulent transport reduction induced by transition on radial electric field shear and curvature through amplitude and cross-phase in torus plasma. / Kobayashi, T.; Itoh, K.; Ido, T.; Kamiya, K.; Itoh, Sanae; Miura, Y.; Nagashima, Yoshihiko; fujisawa, akihide; Shigeru, Inagaki; Ida, K.

:: Scientific reports, 巻 7, 番号 1, 14971, 01.12.2017.

研究成果: ジャーナルへの寄稿記事

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AU - Kobayashi, T.

AU - Itoh, K.

AU - Ido, T.

AU - Kamiya, K.

AU - Itoh, Sanae

AU - Miura, Y.

AU - Nagashima, Yoshihiko

AU - fujisawa, akihide

AU - Shigeru, Inagaki

AU - Ida, K.

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