Nonlinear Coupling of Drift Waves and High Frequency Fluctuation on PANTA

Kazunobu HASAMADA; Yusuke KOSUGA; Fumiyoshi KIN; Sigeru INAGAKI; Yoshihiko NAGASHIMA; Tatsuya KOBAYASHI; Makoto SASAKI; Naohiro KASUYA; Kotaro YAMASAKI; Sanae-I. ITOH; Kimitaka ITOH; Akihide FUJISAWA

doi:10.1585/pfr.12.1201034

Rapid Communications

Nonlinear Coupling of Drift Waves and High Frequency Fluctuation on PANTA

Kazunobu HASAMADA, Yusuke KOSUGA, Fumiyoshi KIN, Sigeru INAGAKI, Yoshihiko NAGASHIMA, Tatsuya KOBAYASHI, Makoto SASAKI, Naohiro KASUYA, Kotaro YAMASAKI, Sanae-I. ITOH, Kimitaka ITOH, Akihide FUJISAWA

Author information

Kazunobu HASAMADA
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Yusuke KOSUGA
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University
Fumiyoshi KIN
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Sigeru INAGAKI
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University
Yoshihiko NAGASHIMA
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University
Tatsuya KOBAYASHI
National Institute for Fusion Science
Makoto SASAKI
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University
Naohiro KASUYA
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University
Kotaro YAMASAKI
Research Institute for Applied Mechanics, Kyushu University
Sanae-I. ITOH
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University
Kimitaka ITOH
Research Center for Plasma Turbulence, Kyushu University
National Institute for Fusion Science
Institute of Science and Technology Research, Chubu University
Akihide FUJISAWA
Research Institute for Applied Mechanics, Kyushu University
Research Center for Plasma Turbulence, Kyushu University

Keywords: nonlinear coupling, multi-time scale, drift wave

JOURNAL FREE ACCESS

2017 Volume 12 Pages 1201034

DOI https://doi.org/10.1585/pfr.12.1201034

Details

Abstract

A new type of nonlinear coupling among multi-time scale of fluctuations is observed on the linear plasma device, PANTA. The low frequency drift waves (DWs), a few kHz and a high frequency fluctuation (the HF fluctuation) (∼ 30 kHz) are simultaneously observed. These fluctuations nonlinearly couple with each other confirmed by bi-coherence analysis. The characteristics of HF fluctuation are also discussed.

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