Abstract
The low energy electron attachment rate constant, ka, for SF6 has been measured in dilute mixtures of SF6 with N2 buffer gas in the temperature, T, range of 300 to 550 K and over a range of E/N values corresponding to mean electron energies, , ranging from 0.19 to 1.0 eV. As the gas temperature increases, the magnitude and energy dependence of ka( , T) remain unaffected. In the same T-range the collisionally stabilized SF6 - is very stable with respect to autodetachment; its lifetime is > 1 ms. The limiting electric field strength (E/N)lim for SF6 was found to increase by ∼14% as T is raised from 300 to 600 K. The significance of these findings in gaseous dielectrics is indicated.
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