Identification of Quasi-Periodic Nonlinear Waveforms in Turbulent Plasmas

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  • INAGAKI Shigeru
    Research Institute for Applied Mechanics, Kyushu University Itoh Research Center for Plasma Turbulence, Kyushu University
  • MIWA Yudai
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • KOBAYASHI Tatsuya
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • YAMADA Takuma
    Faculty of Arts and Science, Kyushu University
  • NAGASHIMA Yoshihiko
    Research Institute for Applied Mechanics, Kyushu University Itoh Research Center for Plasma Turbulence, Kyushu University
  • MITSUZONO Tomohiro
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • FUJINO Hiromitsu
    Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • SASAKI Makoto
    Research Institute for Applied Mechanics, Kyushu University Itoh Research Center for Plasma Turbulence, Kyushu University
  • KASUYA Naohiro
    Research Institute for Applied Mechanics, Kyushu University Itoh Research Center for Plasma Turbulence, Kyushu University
  • LESUR Maxime
    Itoh Research Center for Plasma Turbulence, Kyushu University
  • KOSUGA Yusuke
    Institute for Advanced Study, Kyushu University
  • FUJISAWA Akihide
    Research Institute for Applied Mechanics, Kyushu University Itoh Research Center for Plasma Turbulence, Kyushu University
  • ITOH Sanae-I.
    Research Institute for Applied Mechanics, Kyushu University Itoh Research Center for Plasma Turbulence, Kyushu University
  • ITOH Kimitaka
    Itoh Research Center for Plasma Turbulence, Kyushu University National Institute for Fusion Science

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Abstract

A new method is presented for identifying waveforms of fluctuations in turbulent plasmas. The method is based on heartbeat analysis in which the convolution of a waveform is obtained by employing the phase tracking method. Phase tracking is performed by correlating raw time-series data with a template waveform; the template is evaluated through iteration procedure. The method is applied to fluctuations in a PANTA plasma, and the nonlinear waveform and its distribution of periods are obtained.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 9 (0), 1201016-1201016, 2014

    The Japan Society of Plasma Science and Nuclear Fusion Research

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