Prediction of atmospheric pressure glow discharge in dielectric-barrier system

Abstract

A one-dimensional fluid model was used to investigate the breakdown mechanism and discharge mode in dielectric-barrier system. The results show that the dielectric barrier discharge mode depends strongly on the gas property (i.e., the electron multiplication). The atmospheric pressure dielectric barrier glow discharge could only be achieved in a gas (e.g., noble gas) in which the first Townsend ionization coefficient is sufficiently small and the electron multiplication does not rise up rapidly with the electric field, while could not be sustained in the gas (e.g., N2 and O2) in which the electron multiplication is sensitive to the field.

Comparison of the characteristics of atmospheric pressure plasma jets using different working gases and applications to plasma-cancer cell interactions

“…The range of the applied voltage for a stable N 2 glow regime is very small. 16 In this paper, a pencil-type plasma jet driven by a low-frequency (several tens of kilohertz) ac and pulsed dc voltages is reported. The gas temperature, the plume length and the optical spectra are measured and compared as functions of the applied voltage, the working gases, and the excitation methods (ac-driven and pulsed dc-driven).…”

“…Physically, the breakdown mechanism of APPJs depends strongly on the electron multiplication, which controls the transition from Townsend breakdown to streamer breakdown. 16,17 Since the Townsend ionization coefficient and the mobility of charged species in the electric field depend on the gas properties, the gas type determines the electron multiplication and the breakdown mechanism as well as the discharge mode. In addition, different working gases produce different plasma species resulting in different interactions with the targets.…”