Transport parameters of electron swarms in SF6 and argon gas mixtures

The electron swarm growth processes in SF6-Ar gas mixtures have been studie d by a pulsed Townsend method over the range 32.24 less than or equal to E/ N less than or equal to 564.2 Td (1Td = 10(-21)V.m(2)); where E is the elec tric field and N is the gas density of the mixture. The variation patterns as functions of the density-reduced electric field of the effective ionizat ion coefficient <(alpha)over bar>, electron drift velocity V-e and longitud inal diffusion coefficient D-L in SF6-Ar gas mixtures have been given. The dielectric strength of SF6-Ar gas mixtures has also been determined, and fo und to vary linearly with SF6 concentration in the gas mixtures.