Identification of Quasi-Periodic Nonlinear Waveforms in Turbulent Plasmas

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Author(s)

    • INAGAKI Shigeru
    • 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
    • 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
    • MIWA Yudai
    • Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
    • KOBAYASHI Tatsuya
    • Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
    • NAGASHIMA Yoshihiko
    • Research Institute for Applied Mechanics, Kyushu University|Itoh Research Center for Plasma Turbulence, 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

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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