Streamer Simulations With Highly Accurate Transport Data

Positive streamers in N2:O2-mixtures, like air, have been found to be remarkably robust against changes in the source of free electrons in front of the streamer head and the N2-O2 ratio, both experimentally and in simulations. However, the influence of more accurate transport data (diffusion and mobility coefficients) has not yet been investigated. In this work, we recall recent results in simulations of positive streamers in N2:O2 mixtures and their comparison with experiments, we describe a strategy to obtain accurate field-dependent transport data and finally provide some initial results obtained with these data. Simulations were done for streamers in air at standard temperature and pressure, but transport data can be generated for other pressures and gas compositions. 1