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American Institute of Physics, Journal of Applied Physics, 11(134), 2023

DOI: 10.1063/5.0165318

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

Journal article published in 2023 by D. Nishimura ORCID, A. Fujisawa ORCID, K. Yamasaki ORCID, Y. Nagashima ORCID, C. Moon, T. Nishizawa ORCID, T.-K. Kobayashi ORCID, T. Kobayashi ORCID, A. Shimizu ORCID, T. Tokuzawa ORCID, T. Ido ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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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.