title: Evolution of a plasma vortex in air.
abstract: We report the generation of a vortex-shaped plasma in air by using a capacitively coupled dielectric barrier discharge system. We show that a vortex-shaped plasma can be produced inside a helium gas vortex and is capable of propagating for 3 cm. The fluctuation of the plasma ring shows a scaling relation with the Reynolds number of the vortex. The transient discharge reveals the property of corona discharge, where the conducting channel within the gas vortex and the blur plasma emission are observed at each half voltage cycle.
authors: Department of Physics, National Chung Cheng University, Chiayi 62102, Taiwan.
authors: Cheng-Mu
authors: CM
authors: Tsai
authors: Department of Physics, National Chung Cheng University, Chiayi 62102, Taiwan.
authors: Hong-Yu
authors: HY
authors: Chu
mesh_terms: D000388:Air; D004867:Equipment Design; D006371:Helium; D008962:Models, Theoretical; D009038:Motion; D058626:Plasma Gases
chemical_list: D058626:Plasma Gases; D006371:Helium