[Table of Contents]

Plasma and Fusion Research

Volume 3, 056 (2008)

Rapid Communications

Nonlinear Energy Transfer of Drift-Wave Fluctuation in a Cylindrical Laboratory Plasma
Yoshihiko NAGASHIMA, Sanae -I. ITOH1), Shunjiro SHINOHARA2), Masayuki FUKAO3), Akihide FUJISAWA4), Kenichiro TERASAKA2), Yoshinobu KAWAI2), Naohiro KASUYA4), Masatoshi YAGI1), Shigeru INAGAKI1), Takuma YAMADA and Kimitaka ITOH4)
Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 509-5292, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
2)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Kasuga 816-8580, Japan
3)
Myojocho, Uji 611-001, Japan
4)
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 18 July 2008 / Accepted 14 August 2008 / Published 27 October 2008)

Abstract

Nonlinear energy transfer of the drift-wave spectrum is investigated experimentally in a cylindrical laboratory plasma. Using the Hasegawa-Mima equation, the nonlinear transfer function of electrostatic potential energy in frequency space is estimated by bispectral analysis. The transfer function derived from the drift-wave spectrum indicates a forward cascading of energy transfer from fundamental to higher harmonic modes.

Keywords

drift-wave, Hasegawa-Mima equation, bispectral analysis, nonlinear energy transfer

DOI: 10.1585/pfr.3.056

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References

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This paper may be cited as follows:

Yoshihiko NAGASHIMA, Sanae -I. ITOH, Shunjiro SHINOHARA, Masayuki FUKAO, Akihide FUJISAWA, Kenichiro TERASAKA, Yoshinobu KAWAI, Naohiro KASUYA, Masatoshi YAGI, Shigeru INAGAKI, Takuma YAMADA and Kimitaka ITOH, Plasma Fusion Res. 3, 056 (2008).