Detection of Cascading in Drift Wave Turbulence Using Probe Array in Linear Plasmas

Takuma YAMADA; Sanae -I. ITOH; Takashi MARUTA; Shunjiro SHINOHARA; Naohiro KASUYA; Yoshihiko NAGASHIMA; Masatoshi YAGI; Kenichiro TERASAKA; Masato KAWAGUCHI; Shigeru INAGAKI; Yoshinobu KAWAI; Masayuki FUKAO; Akihide FUJISAWA; Kimitaka ITOH

doi:10.1585/pfr.2.051

Rapid Communications

Detection of Cascading in Drift Wave Turbulence Using Probe Array in Linear Plasmas

Takuma YAMADA, Sanae -I. ITOH, Takashi MARUTA, Shunjiro SHINOHARA, Naohiro KASUYA, Yoshihiko NAGASHIMA, Masatoshi YAGI, Kenichiro TERASAKA, Masato KAWAGUCHI, Shigeru INAGAKI, Yoshinobu KAWAI, Masayuki FUKAO, Akihide FUJISAWA, Kimitaka ITOH

Author information

Takuma YAMADA
Research Institute for Applied Mechanics, Kyushu University
Sanae -I. ITOH
Research Institute for Applied Mechanics, Kyushu University
Takashi MARUTA
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Shunjiro SHINOHARA
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Naohiro KASUYA
National Institute for Fusion Science
Yoshihiko NAGASHIMA
Research Institute for Applied Mechanics, Kyushu University
Masatoshi YAGI
Research Institute for Applied Mechanics, Kyushu University
Kenichiro TERASAKA
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Masato KAWAGUCHI
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
Shigeru INAGAKI
Research Institute for Applied Mechanics, Kyushu University
Yoshinobu KAWAI
Research Institute for Applied Mechanics, Kyushu University
Masayuki FUKAO
Myojocho, Uji
Akihide FUJISAWA
National Institute for Fusion Science
Kimitaka ITOH
National Institute for Fusion Science

Keywords: linear plasma, drift wave, turbulence, cascading process, non-mode excitation, broadband fluctuation

JOURNAL FREE ACCESS

2007 Volume 2 Pages 051

DOI https://doi.org/10.1585/pfr.2.051

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Abstract

Measurement of drift wave turbulence using multi-probe systems was performed in the Large Mirror Device-Upgrade linear plasma. We compared a drift wave's two-dimensional (poloidal wave number and frequency) power spectrum with its calculated linear dispersion relation. As a result, a few wave modes that satisfy the linear dispersion relation were observed. Moreover, cascades to non-mode peaks and broadband components that do not satisfy the dispersion relation were identified.

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