Pulsed Streamer Discharge Generation in a Wire-Cylinder Arrangement with 30-kV, Nanosecond, Arbitrary Waveform Pulses

Recently, we developed the solid-state Impedance-matched Marx Generator (IMG) [1], with the purpose of nanosecond transient plasma generation; either for plasma activated water [2] or pulsed streamer discharges for air purification. By designing the Marx stages compactly and using fast semiconductor components, adjustable pulses with rise times of several nanoseconds and of arbitrary shape are feasible with this topology. Since we require such fast rising pulses for transient plasma generation, the solid-state IMG is ideally suited for our purpose. Recently, we showed that by shaping the waveform from a 10-kV solid-state IMG, we can control the streamer propagation in a cylinder wire reactor [3]. In this contribution we will present recent results on pulsed streamer discharge generation with a 30-kV version of a solid-state IMG. The 30-kV solid-state IMG utilizes twelve stages of gate-boosted [4] and series-connected 1200-V SiC MOSFETs and achieves an (adjustable) several-ns rise time with an adjustable pulse duration of >50 ns. We connected the solid-state IMG to a cylinder-wire reactor of 50-mm diameter and 1-m length and report on ozone generation as a function of pulse parameters and pulse shape.