Characteristics of Nanosecond Pulse Streamer Discharge in a Coaxial Electrode Using a Quadruple emICCD camera System

Recently, a nanosecond pulse power supply capable of generating a pulse voltage with a pulse width of 5 ns and a voltage rise rate of 7.5 kV/ns has been developed and demonstrated to have higher treatment efficiency than general pulsed discharge methods in applications such as ozone generation and exhaust gas treatment using it. However, there is still room to clarify the characteristics of nanosecond pulsed discharge plasma, and clarification of these characteristics will lead to higher treatment efficiency. Therefore, in this study, we focus on the propagation speed of primary streamers generated by nanosecond pulsed discharges, and by using a quadruple emICCD camera system, we observe the propagation speed of primary streamers to evaluate the propagation characteristics of nanosecond pulse streamers.