Measured and calculated swarm transport parameters for SF 6 − in the mixtures of SF 6 with rare gases

In this paper, the SF 6 - mobility is calculated in the gas mixtures SF 6 - Ar, SF 6 - Ne and SF 6 - Xe for different SF 6 concentrations. These mobilities were calculated from a set of collision cross sections (elastic and inelastic) using an optimised Monte Carlo code. The elastic cross sections were determined from a semi classical JWKB approximation, while the inelastic cross sections (detachment, SF 6 - conversion to SF 5 - and F - ) were taken from the literature. These calculated SF 6 - mobilities are compared with those measured with a time-resolved pulsed Townsend technique.