Effects of Nitrogen–Oxygen Ratio on Corona Discharge Luminescence

Corona discharge theory has been widely applied in various industrial fields, including power transmission and transformation project, gas purification, and particle charging. However, its microphysical mechanism remains a hot research topic. Currently, the theoretical analysis of corona discharge lacks consensus on the influence mechanism of oxygen--nitrogen components in air on its luminescent characteristics. This study aims to elucidate the underlying microphysical mechanisms through extensive experimental investigations. Based on our established high-time-resolution experiment platform for plasma imaging with quantum detection technology, we have conducted experiments on corona discharge under different nitrogen--oxygen ratios at a high time resolution. Our results show that in nitrogen, air, and oxygen environments, the luminescent features and development trends of corona discharge are generally consistent but exhibit differences in intensity and development speed depending on the gas environment. Upon analyzing both amplitude characteristics and temporal characteristics of the discharge luminescence, this study proposes an influence mechanism of oxygen components in air on corona discharge luminescence.