[Table of Contents]

Plasma and Fusion Research

Volume 8, 2401113 (2013)

Regular Articles


Statistical Analyses of Turbulent Particle and Momentum Fluxes in a Cylindrical Magnetized Plasma
Makoto SASAKI1,2), Naohiro KASUYA1,2), Masatoshi YAGI2,3), Kimitaka ITOH2,4), Yoshihiko NAGASHIMA1,2), Shigeru INAGAKI1,2) and Sanae-I. ITOH1,2)
1)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
2)
Itoh Research Center for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
3)
Japan Atomic Energy Agency, Rokkasyo-Mura, Aomori 039-3212, Japan
4)
National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
(Received 7 December 2012 / Accepted 21 June 2013 / Published 30 September 2013)

Abstract

A nonlinear simulation of resistive drift wave turbulence in a cylindrical plasma is carried out. Long time evolution of turbulence with formation of a zonal flow is obtained for more than 1000 times of the typical drift wave period, which is sufficient for statistical analyses. Dynamical particle and momentum balance for the formation of the mean reveals that the radial turbulent fluxes are dominant contributors for the evolution of fluctuations. The particle flux is found to precede the momentum flux for 0.4 times of the typical drift wave period with large temporal variance. The analyses of the time series data of 3-D fields give the understanding of the dynamical structural formation mechanism.


Keywords

drift wave turbulence, cylindrical magnetized plasma, zonal flow, particle flux, momentum flux, probability density function

DOI: 10.1585/pfr.8.2401113


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This paper may be cited as follows:

Makoto SASAKI, Naohiro KASUYA, Masatoshi YAGI, Kimitaka ITOH, Yoshihiko NAGASHIMA, Shigeru INAGAKI and Sanae-I. ITOH, Plasma Fusion Res. 8, 2401113 (2013).