A stable and diffusive atmospheric pressure glow discharge in ambient air obtained by applying an axial magnetic field between pin-to-plate electrodes

Abstract

In recent years, a lot of research focuses on atmospheric pressure glow discharge, but how to obtain a stable and uniform large-volume glow discharge at atmospheric pressure is still a difficult technological problem, especially in large ambient air gap. In this paper, with an external axial magnetic field applied in the pin-to-plate electrode gap, a stable and diffusive atmospheric pressure glow discharge in ambient air is obtained. Influences of different factors such as the output-voltage amplitude of the power supply, the intensity of the magnetic field, the resonant frequency of power supply, and different inter-electrode gap sizes are studied. The results show that a more diffusive and bigger-volume glow discharge can be obtained by increasing the amplitude of the output voltage of the power supply, the intensity of the external magnetic field, or the resonant frequency in the longer-distance pin-to-plate gap.