Experimentally derived rate coefficients for electron ionization, attachment and detachment as well as ion conversion in pure O2 and N2–O2 mixtures

Abstract

We obtain rate coefficients for mixtures of and as well as pure , by fitting pulsed Townsend measurements over a large pressure range from 3 kPa to 100 kPa in a density-reduced electric field range from 40 to 110 Td (1 Td = 10−21 Vm2). The applied model includes ionization, dissociative attachment to and non-dissociative attachment to , and detachment, as well as charge transfer and ion conversion from to and . The results are compared to Bolsig+ and MAGBOLTZ simulations and experimental data, where available. The key novelty is the simultaneously obtained rate coefficients from a single pulsed Townsend experiment including several ion processes over the whole – mixing range.