Positive point-to-plane corona discharge in air: electrical and optical analysis
Résumé
This paper is devoted to electrical and optical experimental analysis of positive point-to-plane corona discharges in the dry air and different N2/O2/CO2 mixtures. The aim is a better understanding of these corona discharge features and to use them in a future work for the validation of the discharge modeling tools in the case of non thermal pollution control device. The paper details more particularly the microdischarge evolution and morphology under several operating conditions such as the applied DC voltage magnitude and the gas composition. For this purpose, two optical techniques (CCD and streak camera)and electrical diagnostics are used. The primary and secondary streamer developments are more particularly emphasized. The velocity of the primary streamer is deduced from the analysis of both instantaneous discharge currents and streak pictures.