Development of atmospheric pressure air dielectric barrier glow discharge in large gaps through modulation of pulsed power supply upon AC

The development of dielectric barrier discharge (DBD) in glow mode in large gaps in air at atmospheric pressure, due to providing diffuse, uniform, safe, and economic treatments for a wide range of substrates and for many applications, could be a beneficial way to enhance cold plasma applications in various industries. Here, we generated a glow DBD that has a volume-surface coupling geometrical structure in a 1mm gap distance by a pulsed power supply and expanded the gap distance up to 2 cm by modulating the pulsed power supply on an AC one. The resulting glow discharges were studied by voltage-current waveform and atomic emission spectroscopy.