Formation Process of a Solitary Vortex in a Zonal Flow - Drift-Wave Dynamics

  • ARAKAWA Hiroyuki
    Department of Health Sciences, Faculty of Medical Sciences, Kyushu University
  • SASAKI Makoto
    College of Industrial Technology, Nihon University
  • INAGAKI Shigeru
    Institute of Advanced Energy, Kyoto University Research Centre for Plasma Turbulence, Kyushu University
  • LESUR Maxime
    Université de Lorraine, CNRS, IJL
  • KOSUGA Yusuke
    Research Centre for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • KOBAYASHI Tatsuya
    National Institute for Fusion Science, National Institutes of Natural Sciences
  • KIN Fumiyoshi
    National Institutes for Quantum and Radiological Science and Technology
  • YAMADA Takuma
    Research Centre for Plasma Turbulence, Kyushu University Faculty of Arts and Science, Kyushu University
  • NAGASHIMA Yoshihiko
    Research Centre for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • FUJISAWA Akihide
    Research Centre for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • ITOH Kimitaka
    Research Centre for Plasma Turbulence, Kyushu University National Institute for Fusion Science, National Institutes of Natural Sciences Frontier Research Institute, Chubu University

Description

<p>A solitary vortex organization process in drift-wave type fluctuations interacting with the zonal flow was identified experimentally in a linear magnetized plasma. An azimuthal probe array was used to evaluate temporal changes in the amplitude and phase in the density fluctuations. Excitation/damping of the solitary vortex is synchronized with zonal perturbation, and the waveform of drift-wave type fluctuation and its harmonics also changes synchronously. The solitary vortex is formed primarily through the phase modulation of the fundamental drift-wave type fluctuation and its harmonics.</p>

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 17 (0), 1301106-1301106, 2022-11-24

    The Japan Society of Plasma Science and Nuclear Fusion Research

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