Plasma and Fusion Research

Volume 19, 1201005 (2024)

Rapid Communications

Velocity Field Estimation using Tomography in a Cylindrical Plasma
Daiki NISHIMURA, Akihide FUJISAWA1,2), Yoshihiko NAGASHIMA1,2), Chanho MOON1,2), Kotaro YAMASAKI3), Takashi NISHIZAWA1,2), Taiki KOBAYASHI, Tatsuya KOBAYASHI1,4), Akihiro SHIMIZU1,4) and Tokihiko TOKUZAWA1,4)
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
Research Institute for Applied Mechanics, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
Research Center for Plasma Turbulence Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
Graduate School of Advanced Science and Engineering, Hiroshima University, 1-4-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8527, Japan
National Institute for Fusion Science, National Institute of Natural Sciences, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
(Received 29 November 2023 / Accepted 9 December 2023 / Published 26 January 2024)


This article presents a new method, called extended Rotational Movement Analysis (e-RoMA), to estimate the velocity field of a cylindrical plasma from its two-dimensional images based on Fourier-Bessel function expansion. The proposed method is applied to tomography images of a plasma produced in a linear cylindrical device PANTA and succeeded in obtaining the two- dimensional velocity field. The first results suggest an issue to be investigated, that is, the presence of azimuthal asymmetry in the velocity field.


velocimetry, tomography, cylindrical plasma, plasma emission

DOI: 10.1585/pfr.19.1201005


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  • [2] D. Nishimura et al., J. Appl. Phys. 134, 113302 (2023).
  • [3] K. Yamasaki et al., Rev. Sci. Instrum. 88, 093507 (2017).