Rotational movement analysis based on Fourier-rectangular function transform for cylindrical plasma-Reference-Cited by-同舟云学术

Rotational movement analysis based on Fourier-rectangular function transform for cylindrical plasma

Published:2023-09-19 Issue:11 Volume:134 Page:
ISSN:0021-8979
Container-title:Journal of Applied Physics
language:en
Short-container-title:

Author:

Nishimura D.¹^ORCID,Fujisawa A.²³⁴^ORCID,Yamasaki K.⁵^ORCID,Nagashima Y.²³^ORCID,Moon C.²³,Nishizawa T.²³^ORCID,Kobayashi T.-K.¹^ORCID,Kobayashi T.²⁴^ORCID,Shimizu A.²⁴^ORCID,Tokuzawa T.²⁴^ORCID,Ido T.²³^ORCID

Affiliation:

1. Interdisciplinary Graduate School of Engineering Sciences, Kyushu University 1 , Kasuga 816-8580, Japan

2. Research Institute for Applied Mechanics, Kyushu University 2 , Kasuga 816-8580, Japan

3. Research Center for Plasma Turbulence, Kyushu University 3 , Kasuga 816-8580, Japan

4. National Institute for Fusion Science, National Institute of Natural Sciences 4 , Toki 509-5202, Japan

5. Graduate School of Advanced Science and Engineering, Hiroshima University 5 , Higashihiroshima 739-8527, Japan

Abstract

This article presents a method to estimate the rotational velocity of a cylindrical plasma from its two-dimensional images by an extended use of the Fourier-rectangular function transform, which was proposed to analyze the structure and dynamics of a cylindrical plasma [K. Yamasaki etal., J. Appl. Phys. 126, 043304 (2019)]. The proposed method is applied to tomography images of plasmas produced in a linear cylindrical device and succeeds in obtaining the radial distribution of rotational velocity and its fluctuations, providing an interesting finding, that is, the existence of flow modulation associated with m=1 mode fluctuations.

Funder

Japan Society for the Promotion of Science

Publisher

AIP Publishing

Subject

General Physics and Astronomy

Link

https://pubs.aip.org/aip/jap/article-pdf/doi/10.1063/5.0165318/18130184/113302_1_5.0165318.pdf

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