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A Method to Analyze Plasma Images Using Modified Fourier-Bessel Functions

Yuki NISHIMURA, Akihide FUJISAWA¹⁾, Yoshihiko NAGASHIMA¹⁾, Chanho MOON¹⁾, Takashi NISHIZAWA¹⁾, Tatsuya KOBAYASHI^1,2), Akihiro SHIMIZU^1,2), Tokihiko TOKUZAWA^1,2), Takeshi IDO^1,2), Daiki NISHIMURA and Taiki KOBAYASHI

Interdisciplinary Graduate School of Engineering Science, 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)

National Institute for Fusion Science, Toki 509-5202, Japan

(Received 11 January 2024 / Accepted 24 January 2024 / Published 20 March 2024)

Abstract

A new method is proposed to analyze plasma image of tomography using modified Fourier-Bessel Functions (FBF) instead of the original FBF analysis. The application of the method to an assumed plasma image shows that the difference between the original and the fitting image is improved considerably to that of FBF, owing to giving a better fitting inside the plasma and eliminating the ghost values outside the plasma, without any disadvantages in analysis of plasma structures and patterns.

Copyright (c) 2024 The Japan Society of Plasma Science and Nuclear Fusion Research

Keywords

plasma, turbulence, tomography, Fourier-Bessel function, Modified Fourier-Bessel Function

DOI: 10.1585/pfr.19.1201014

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References

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