Nanosecond-pulsed atmospheric pressure glow discharge plasma and its applications

A nanosecond pulsed high voltage power based on semiconductor opening switch was employed to generate atmospheric pressure glow air plasma between a high voltage needle-array electrode and a grounded plate electrode. The discharge volume was 1 600 mm×100 mm×25 mm. In the plasma generator, conical glow discharges were generated simultaneously at all the needle tips and large area glow discharges were formed at the grounded plate electrode at the same time. The diameter and length of each needle, the space between adjacent needles and the distance from the needle tip to the grounded plate electrode surface were 1, 20, 20 and 25 mm, respectively. The electrical property of the discharge was studied by measuring the voltage across the discharge with a high voltage probe. The result shows tha