Plasma and Fusion Research

Volume 16, 1201075 (2021)

Rapid Communications

Fourier-Rectangular Function Analysis of Spatiotemporal Structure of Bursting Phenomenon in a Cylindrical Plasma
Daiki NISHIMURA, Akihide FUJISAWA1), Yoshihiko NAGASHIMA1), Chanho MOON1), Kotaro YAMASAKI2), Taiki KOBAYASHI and Shigeru INAGAKI1)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
1)
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
2)
Department of Mechanical Engineering, Graduate School of Engineering, Hiroshima University, Higashihiroshima, Hiroshima 739-8527, Japan
(Received 7 April 2021 / Accepted 16 April 2021 / Published 7 June 2021)

Abstract

The tomography measurement, with a help of a newly developed analysis called Fourier-rectangular function (FRF) transform, reveals the properties of the bursting phenomenon occurring at the lower operational boundary of the filling pressure in a cylindrical plasma produced with a helicon source. The analysis provided a clear difference in the spatiotemporal structure between the bursting and quiescent states in the phenomenon.

Keywords

tomography, fluctuation, linear magnetized plasma, plasma emission, asymmetry

DOI: 10.1585/pfr.16.1201075

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