Study of turbulence intermittency in linear magnetized plasma

Boyu Zhang, Shigeru Inagaki, Kazunobu Hasamada, Kotaro Yamasaki, Fumiyoshi Kin, Yoshihiko Nagashima, Takuma Yamada, Akihide Fujisawa

Research output: Contribution to journalArticle

Abstract

The intermittent behavior of a quasi-coherent density fluctuation is observed in a laboratory plasma. The quasi-coherent fluctuation is localized but intermittent events are observed in the whole region of plasma. Conditional averaging shows the intermittent events propagate from the central region of the magnetized plasma column to the peripheral region. Auto-correlation function of fluctuations and Hurst analysis reveal the intermittency is highly auto-correlated and the Hurst parameter reaches to 0.8, indicating the existence of self-similar behavior and long-range time correlation, and self-organized criticality dynamics might be the mechanism. Cross-bicoherence between different radii shows the nonlinear coupling between the quasi-coherent fluctuation and ambient turbulence, which will contribute to the generation of intermittency of turbulence.

Original languageEnglish
Article number115010
JournalPlasma Physics and Controlled Fusion
Volume61
Issue number11
DOIs
Publication statusPublished - Oct 7 2019

Fingerprint

intermittency
Turbulence
turbulence
Plasmas
Autocorrelation
autocorrelation
radii

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Study of turbulence intermittency in linear magnetized plasma. / Zhang, Boyu; Inagaki, Shigeru; Hasamada, Kazunobu; Yamasaki, Kotaro; Kin, Fumiyoshi; Nagashima, Yoshihiko; Yamada, Takuma; Fujisawa, Akihide.

In: Plasma Physics and Controlled Fusion, Vol. 61, No. 11, 115010, 07.10.2019.

Research output: Contribution to journalArticle

@article{43fd608234114fddb6951230cc8ce5de,
title = "Study of turbulence intermittency in linear magnetized plasma",
abstract = "The intermittent behavior of a quasi-coherent density fluctuation is observed in a laboratory plasma. The quasi-coherent fluctuation is localized but intermittent events are observed in the whole region of plasma. Conditional averaging shows the intermittent events propagate from the central region of the magnetized plasma column to the peripheral region. Auto-correlation function of fluctuations and Hurst analysis reveal the intermittency is highly auto-correlated and the Hurst parameter reaches to 0.8, indicating the existence of self-similar behavior and long-range time correlation, and self-organized criticality dynamics might be the mechanism. Cross-bicoherence between different radii shows the nonlinear coupling between the quasi-coherent fluctuation and ambient turbulence, which will contribute to the generation of intermittency of turbulence.",
author = "Boyu Zhang and Shigeru Inagaki and Kazunobu Hasamada and Kotaro Yamasaki and Fumiyoshi Kin and Yoshihiko Nagashima and Takuma Yamada and Akihide Fujisawa",
year = "2019",
month = "10",
day = "7",
doi = "10.1088/1361-6587/ab434f",
language = "English",
volume = "61",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing Ltd.",
number = "11",

}

TY - JOUR

T1 - Study of turbulence intermittency in linear magnetized plasma

AU - Zhang, Boyu

AU - Inagaki, Shigeru

AU - Hasamada, Kazunobu

AU - Yamasaki, Kotaro

AU - Kin, Fumiyoshi

AU - Nagashima, Yoshihiko

AU - Yamada, Takuma

AU - Fujisawa, Akihide

PY - 2019/10/7

Y1 - 2019/10/7

N2 - The intermittent behavior of a quasi-coherent density fluctuation is observed in a laboratory plasma. The quasi-coherent fluctuation is localized but intermittent events are observed in the whole region of plasma. Conditional averaging shows the intermittent events propagate from the central region of the magnetized plasma column to the peripheral region. Auto-correlation function of fluctuations and Hurst analysis reveal the intermittency is highly auto-correlated and the Hurst parameter reaches to 0.8, indicating the existence of self-similar behavior and long-range time correlation, and self-organized criticality dynamics might be the mechanism. Cross-bicoherence between different radii shows the nonlinear coupling between the quasi-coherent fluctuation and ambient turbulence, which will contribute to the generation of intermittency of turbulence.

AB - The intermittent behavior of a quasi-coherent density fluctuation is observed in a laboratory plasma. The quasi-coherent fluctuation is localized but intermittent events are observed in the whole region of plasma. Conditional averaging shows the intermittent events propagate from the central region of the magnetized plasma column to the peripheral region. Auto-correlation function of fluctuations and Hurst analysis reveal the intermittency is highly auto-correlated and the Hurst parameter reaches to 0.8, indicating the existence of self-similar behavior and long-range time correlation, and self-organized criticality dynamics might be the mechanism. Cross-bicoherence between different radii shows the nonlinear coupling between the quasi-coherent fluctuation and ambient turbulence, which will contribute to the generation of intermittency of turbulence.

UR - http://www.scopus.com/inward/record.url?scp=85074920757&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85074920757&partnerID=8YFLogxK

U2 - 10.1088/1361-6587/ab434f

DO - 10.1088/1361-6587/ab434f

M3 - Article

AN - SCOPUS:85074920757

VL - 61

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 11

M1 - 115010

ER -