[Table of Contents]

Plasma and Fusion Research

Volume 2, 051 (2007)

Rapid Communications


Detection of Cascading in Drift Wave Turbulence Using Probe Array in Linear Plasmas
Takuma YAMADA, -Sanae -I. ITOH, Takashi MARUTA1), Shunjiro SHINOHARA1), Naohiro KASUYA2), Yoshihiko NAGASHIMA, Masatoshi YAGI, Kenichiro TERASAKA1), Masato KAWAGUCHI1), Shigeru INAGAKI, Yoshinobu KAWAI, Masayuki FUKAO3), Akihide FUJISAWA2) and Kimitaka ITOH2)
Research Institute for Applied Mechanics, Kyushu University
1)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
2)
National Institute for Fusion Science
3)
Myojocho, Uji
(Received 18 September 2007 / Accepted 12 November 2007 / Published 14 December 2007)

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.


Keywords

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

DOI: 10.1585/pfr.2.051


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This paper may be cited as follows:

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 and Kimitaka ITOH, Plasma Fusion Res. 2, 051 (2007).