The importance of pre-ionization on surface and volume for Atmospheric Pressure Townsend Discharges (APTD)

International audienceThis work is focused on the study of the pre-ionization mechanisms in Dielectric Barrier Discharges (DBD) at atmospheric pressure in N2-O2 mixtures leading to a homogeneous Townsend discharge. The seed electrons can originate from the surfaces or from the gas bulk. This work aims to summarize and to quantify the importance of the predominant sources of seed electrons, considering the different memory effect mechanisms