On the Nonlinear Coupling of the High Wavenumber Fluctuations Exhibiting the Discrete Spectra Observed in PANTA

DOI Web Site 7 References
  • KAWACHI Yuichi
    Graduate School of Engineering, Nagoya University
  • SASAKI Makoto
    College of Industrial Technology, Nihon University Research Center for Plasma Turbulence, Kyushu University
  • NISHIZAWA Takashi
    Research Center for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • KOSUGA Yusuke
    Research Center for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • TERASAKA Kenichiro
    Department of Computer and Information Sciences, Sojo University
  • INAGAKI Shigeru
    Institute of Advanced Energy, Kyoto University
  • YAMADA Takuma
    Faculty of Arts and Science, Kyushu University
  • KASUYA Naohiro
    Research Center for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • MOON Chanho
    Research Center for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • NAGASHIMA Yoshihiko
    Research Center for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University
  • FUJISAWA Akihide
    Research Center for Plasma Turbulence, Kyushu University Research Institute for Applied Mechanics, Kyushu University

Description

<p>We report on the nonlinear coupling properties of high-wavenumber fluctuation, which exhibits discrete frequency spectra with a frequency span comparable to the ion cyclotron frequency observed in PANTA. Bicoherence analysis is used to investigate this nonlinear coupling. The results indicate a finite coupling between individual discrete peaks but no coupling between the ion cyclotron frequency components of these discrete peaks. This suggests that the observed turbulence with a discrete spectrum is destabilized linearly rather than through nonlinear coupling.</p>

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 19 (0), n/a-, 2024-11-10

    The Japan Society of Plasma Science and Nuclear Fusion Research

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