Roles of solitary eddy and splash in drift wave-zonal flow system in a linear magnetized plasma

H. Arakawa; M. Sasaki; S. Inagaki; Y. Kosuga; T. Kobayashi; N. Kasuya; T. Yamada; Y. Nagashima; F. Kin; A. Fujisawa; K. Itoh; S. I. Itoh

doi:10.1063/1.5094577

Roles of solitary eddy and splash in drift wave-zonal flow system in a linear magnetized plasma

H. Arakawa, M. Sasaki, S. Inagaki, Y. Kosuga, T. Kobayashi, N. Kasuya, T. Yamada, Y. Nagashima, F. Kin, A. Fujisawa, K. Itoh, S. I. Itoh

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Abstract

We experimentally investigate the roles of drift wave type fluctuations interacting with zonal flow. The drift wave type fluctuations examined in this paper are characterized by nonlinear solitary wave, splash, and solitary eddy [Arakawa et al., Sci. Rep. 6, 33371 (2016)]. Compared to the nonlinear solitary wave, splash has a short lifetime, while solitary eddy has a long lifetime. Excitation/damping of the splash and the solitary eddy are synchronized with zonal perturbation. The roles of the splash and the solitary eddy in transport processes are also discussed. Solitary eddy contributes to momentum transport and accelerates zonal flow. The particle flux driven by the solitary eddy and the splash is in the inward and outward directions, respectively, with similar magnitudes.

Original language	English
Article number	052305
Journal	Physics of Plasmas
Volume	26
Issue number	5
DOIs	https://doi.org/10.1063/1.5094577
Publication status	Published - May 1 2019

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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Arakawa, H., Sasaki, M., Inagaki, S., Kosuga, Y., Kobayashi, T., Kasuya, N., Yamada, T., Nagashima, Y., Kin, F., Fujisawa, A., Itoh, K., & Itoh, S. I. (2019). Roles of solitary eddy and splash in drift wave-zonal flow system in a linear magnetized plasma. Physics of Plasmas, 26(5), [052305]. https://doi.org/10.1063/1.5094577

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abstract = "We experimentally investigate the roles of drift wave type fluctuations interacting with zonal flow. The drift wave type fluctuations examined in this paper are characterized by nonlinear solitary wave, splash, and solitary eddy [Arakawa et al., Sci. Rep. 6, 33371 (2016)]. Compared to the nonlinear solitary wave, splash has a short lifetime, while solitary eddy has a long lifetime. Excitation/damping of the splash and the solitary eddy are synchronized with zonal perturbation. The roles of the splash and the solitary eddy in transport processes are also discussed. Solitary eddy contributes to momentum transport and accelerates zonal flow. The particle flux driven by the solitary eddy and the splash is in the inward and outward directions, respectively, with similar magnitudes.",

author = "H. Arakawa and M. Sasaki and S. Inagaki and Y. Kosuga and T. Kobayashi and N. Kasuya and T. Yamada and Y. Nagashima and F. Kin and A. Fujisawa and K. Itoh and Itoh, {S. I.}",

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T1 - Roles of solitary eddy and splash in drift wave-zonal flow system in a linear magnetized plasma

AU - Arakawa, H.

AU - Sasaki, M.

AU - Inagaki, S.

AU - Kosuga, Y.

AU - Kobayashi, T.

AU - Kasuya, N.

AU - Yamada, T.

AU - Nagashima, Y.

AU - Kin, F.

AU - Fujisawa, A.

AU - Itoh, K.

AU - Itoh, S. I.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - We experimentally investigate the roles of drift wave type fluctuations interacting with zonal flow. The drift wave type fluctuations examined in this paper are characterized by nonlinear solitary wave, splash, and solitary eddy [Arakawa et al., Sci. Rep. 6, 33371 (2016)]. Compared to the nonlinear solitary wave, splash has a short lifetime, while solitary eddy has a long lifetime. Excitation/damping of the splash and the solitary eddy are synchronized with zonal perturbation. The roles of the splash and the solitary eddy in transport processes are also discussed. Solitary eddy contributes to momentum transport and accelerates zonal flow. The particle flux driven by the solitary eddy and the splash is in the inward and outward directions, respectively, with similar magnitudes.

AB - We experimentally investigate the roles of drift wave type fluctuations interacting with zonal flow. The drift wave type fluctuations examined in this paper are characterized by nonlinear solitary wave, splash, and solitary eddy [Arakawa et al., Sci. Rep. 6, 33371 (2016)]. Compared to the nonlinear solitary wave, splash has a short lifetime, while solitary eddy has a long lifetime. Excitation/damping of the splash and the solitary eddy are synchronized with zonal perturbation. The roles of the splash and the solitary eddy in transport processes are also discussed. Solitary eddy contributes to momentum transport and accelerates zonal flow. The particle flux driven by the solitary eddy and the splash is in the inward and outward directions, respectively, with similar magnitudes.

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