KHz Atmospheric Pressure Plasma Jets
Capillary jets operated in the kHz range produce relatively long plasma jets, which appear continuous to the naked eye, but on micro-second timescales are actually pulsed. The figure shows a photograph of a cylindrical dielectric barrier discharge jet. The discharge configuration consists of a glass tube with internal diameter 4 mm and thickness 1 mm. Tubular copper electrodes surround the glass tube and are driven at 20 kHz.