TY - JOUR
T1 - Observation of nonlinear coupling between low frequency coherent modes and background turbulence in LMD-U
AU - Kobayashi, Tatsuya
AU - Shigeru, Inagaki
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
AU - Itoh, Kimitaka
N1 - Funding Information:
This work was partly supported by a Grant-in-Aid for Scientific Research (S) from the Japan Society for the Promotion of Science (21224014) and the collaboration programs of RIAM at Kyushu University and the National Institute of Fusion Science (NIFS07KOAP017).
Publisher Copyright:
© 2011 The Japan Society of Plasma Science and Nuclear Fusion Research.
PY - 2011
Y1 - 2011
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.
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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 -