Plasma and Fusion Research

Volume 18, 1401032 (2023)

Regular Articles

Reynolds Force Evaluation of Quasi-Coherent Structure by Tomographic Laser-Induced Fluorescence Spectroscopy
Hiroyuki ARAKAWA, Makoto SASAKI1), Shigeru INAGAKI2,3) and Akihide FUJISAWA3,4)
Department of Health Sciences, Faculty of Medical Sciences, Kyushu University, Fukuoka 812-8582, Japan
1)
College of Industrial Technology, Nihon University, Narashino 275-8575, Japan
2)
Institute of Advanced Energy, Kyoto University, Uji 611-0011, Japan
3)
Research Centre for Plasma Turbulence, Kyushu University, Kasuga 816-8580, Japan
4)
Research Institute for Applied Mechanics, Kyushu University, Kasuga 816-8580, Japan
(Received 20 December 2022 / Accepted 27 March 2023 / Published 12 May 2023)

Abstract

A new method of vector tomography by laser-induced fluorescence (LIF) spectroscopy is proposed for the evaluation of the velocity field of quasi-coherent structure in linear magnetized plasma. Here, the two-dimensional velocity field was reconstructed with measuring synchronization of azimuthal reference probes and line-integrated LIF. The laser installation condition is designed to move in a radial direction perpendicular to the laser path. We applied the proposed method to a quasi-coherent flow obtained from a direct numerical turbulence simulation and demonstrated that the Reynolds stress and its force can be evaluated if its flow structure is maintained.

Keywords

magnetized plasma, laser-induced fluorescence, vector tomography, two-dimensional velocity field, Reynolds force

DOI: 10.1585/pfr.18.1401032

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