Derivation of Plasma Propagation Velocity by Visual and Electrical Composite Analysis

For the plasma generated as a stationary wave in a vacuum vessel, the propagation velocity of the plasma was derived by a simple composite analysis consisting of a plasma emission image and a time fluctuation of the plasma current. The propagation wavelength of the plasma was derived from the shading interval length of the plasma emission intensity obtained by the digital camera in the visual analysis, and the propagation frequency of the plasma was derived from the time variation of the plasma current measured by a current probe in the electrical analysis. (c) 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.