Observation of nonlinear coupling between low frequency coherent modes and background turbulence in LMD-U

Tatsuya Kobayashi, Shigeru Inagaki, Hiroyuki Arakawa, Stella Oldenbürger, Makoto Sasaki, Yoshihiko Nagashima, Takuma Yamada, Satoru Sugita, Masatoshi Yagi, Naohiro Kasuya, Akihide Fujisawa, Sanae I. Itoh, Kimitaka Itoh

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A solitary wave like fluctuating structure is observed in the Large Mirror Device-Upgrade (LMD-U) under relatively high neutral pressure conditions. Ion saturation current fluctuations are measured and Fourier and wavelet power spectra are calculated. Temporal behavior of fluctuation power and strength of nonlinear coupling of low frequency coherent mode and background turbulence in a specific frequency region is analyzed. This is achieved using wavelet spectral and bispectral analyses with conditional averaging.

Original languageEnglish
Article number2401082
JournalPlasma and Fusion Research
Volume6
DOIs
Publication statusPublished - Jan 1 2011

Fingerprint

turbulence
mirrors
low frequencies
power spectra
solitary waves
saturation
ions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Observation of nonlinear coupling between low frequency coherent modes and background turbulence in LMD-U. / Kobayashi, Tatsuya; Inagaki, Shigeru; Arakawa, Hiroyuki; Oldenbürger, Stella; Sasaki, Makoto; Nagashima, Yoshihiko; Yamada, Takuma; Sugita, Satoru; Yagi, Masatoshi; Kasuya, Naohiro; Fujisawa, Akihide; Itoh, Sanae I.; Itoh, Kimitaka.

In: Plasma and Fusion Research, Vol. 6, 2401082, 01.01.2011.

Research output: Contribution to journalArticle

@article{d80b55216a2a4bd4abfc4538c1ac86b0,
title = "Observation of nonlinear coupling between low frequency coherent modes and background turbulence in LMD-U",
abstract = "A solitary wave like fluctuating structure is observed in the Large Mirror Device-Upgrade (LMD-U) under relatively high neutral pressure conditions. Ion saturation current fluctuations are measured and Fourier and wavelet power spectra are calculated. Temporal behavior of fluctuation power and strength of nonlinear coupling of low frequency coherent mode and background turbulence in a specific frequency region is analyzed. This is achieved using wavelet spectral and bispectral analyses with conditional averaging.",
author = "Tatsuya Kobayashi and Shigeru Inagaki and Hiroyuki Arakawa and Stella Oldenb{\"u}rger and Makoto Sasaki and Yoshihiko Nagashima and Takuma Yamada and Satoru Sugita and Masatoshi Yagi and Naohiro Kasuya and Akihide Fujisawa and Itoh, {Sanae I.} and Kimitaka Itoh",
year = "2011",
month = "1",
day = "1",
doi = "10.1585/pfr.6.2401082",
language = "English",
volume = "6",
journal = "Plasma and Fusion Research",
issn = "1880-6821",
publisher = "The Japan Society of Plasma Science and Nuclear Fusion Research (JSPF)",

}

TY - JOUR

T1 - Observation of nonlinear coupling between low frequency coherent modes and background turbulence in LMD-U

AU - Kobayashi, Tatsuya

AU - Inagaki, Shigeru

AU - Arakawa, Hiroyuki

AU - Oldenbürger, Stella

AU - Sasaki, Makoto

AU - Nagashima, Yoshihiko

AU - Yamada, Takuma

AU - Sugita, Satoru

AU - Yagi, Masatoshi

AU - Kasuya, Naohiro

AU - Fujisawa, Akihide

AU - Itoh, Sanae I.

AU - Itoh, Kimitaka

PY - 2011/1/1

Y1 - 2011/1/1

N2 - A solitary wave like fluctuating structure is observed in the Large Mirror Device-Upgrade (LMD-U) under relatively high neutral pressure conditions. Ion saturation current fluctuations are measured and Fourier and wavelet power spectra are calculated. Temporal behavior of fluctuation power and strength of nonlinear coupling of low frequency coherent mode and background turbulence in a specific frequency region is analyzed. This is achieved using wavelet spectral and bispectral analyses with conditional averaging.

AB - A solitary wave like fluctuating structure is observed in the Large Mirror Device-Upgrade (LMD-U) under relatively high neutral pressure conditions. Ion saturation current fluctuations are measured and Fourier and wavelet power spectra are calculated. Temporal behavior of fluctuation power and strength of nonlinear coupling of low frequency coherent mode and background turbulence in a specific frequency region is analyzed. This is achieved using wavelet spectral and bispectral analyses with conditional averaging.

UR - http://www.scopus.com/inward/record.url?scp=84867302548&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867302548&partnerID=8YFLogxK

U2 - 10.1585/pfr.6.2401082

DO - 10.1585/pfr.6.2401082

M3 - Article

AN - SCOPUS:84867302548

VL - 6

JO - Plasma and Fusion Research

JF - Plasma and Fusion Research

SN - 1880-6821

M1 - 2401082

ER -