Non-thermal plasma excited by compact nanosecond solid-state pulse forming line in atmospheric air

摘要

Non-thermal plasma is a promising technology for the generation of ozone and removal of exhausted fuel gases. Energy efficiencies become more and more important in many industry applications. Discharge excited by nanosecond pulsed power is said to be one of the most efficient method. In this study, a compact 4 stages stacked blumlein pulse forming line based power source will be introduced to generate pulsed plasma. Photoconductive semiconductors witches has been used as the main switch of the compact pulsed source. These switches were driven by laser diodes for its compact size and low jitter. This compact source could achieve over 50kV with 10ns pulse width and 3ns pulse rising time. A concentric coaxial cylindrical reactor was employed to generate a pulsed streamer discharge driven by the nanosecond pulsed source in atmospheric air. Some parameters of the streamer such as discharge voltage and current have been taken measured in this study. And some of the plasma parameters will be given by diagnosing the emission spectrum of the plasma. Experiments of high speed photography with the exposure time of 2ns has been used to observe the evolution process, the results will also be mentioned in the report.