[Table of Contents]

Plasma and Fusion Research

Volume 5, S2044 (2010)

Regular Articles

Probability Density Function of Density Fluctuations in Cylindrical Helicon Plasmas
Hiroyuki ARAKAWA, Shigeru INAGAKI1), Yoshihiko NAGASHIMA2), Takuma YAMADA2), Kunihiro KAMATAKI1), Tatsuya KOBAYASHI, Satoru SUGITA, Masatoshi YAGI1), Naohiro KASUYA3), Akihide FUJISAWA1), Sanae -I. ITOH1) and Kimitaka ITOH3)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, Fukuoka 816-8580, Japan
2)
Graduate School of Frontier Sciences, The University of Tokyo, Tokyo 277-8561, Japan
3)
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 6 December 2009 / Accepted 26 April 2010 / Published 10 December 2010)

Abstract

The turbulence fluctuation spectra of linear magnetized plasmas are measured under various neutral pressure conditions. Strong turbulent waves and symmetric waves are observed in low and high neutral pressure conditions. In this study, we compare the radial structure of the probability density function (PDF) of these fluctuations. The characteristics of the PDFs are related to those of the radial and poloidal turbulent structures.

Keywords

turbulence, probability density function, linear magnetized plasma

DOI: 10.1585/pfr.5.S2044

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This paper may be cited as follows:

Hiroyuki ARAKAWA, Shigeru INAGAKI, Yoshihiko NAGASHIMA, Takuma YAMADA, Kunihiro KAMATAKI, Tatsuya KOBAYASHI, Satoru SUGITA, Masatoshi YAGI, Naohiro KASUYA, Akihide FUJISAWA, Sanae -I. ITOH and Kimitaka ITOH, Plasma Fusion Res. 5, S2044 (2010).