Pressure-Dependent Breakdown Potentials in Penning Mixtures

1 May 1965

journal article
research article
Published by AIP Publishing in Journal of Applied Physics

Vol. 36 (5) , 1515-1522
https://doi.org/10.1063/1.1703079

Abstract

Measurements have been made of the primary and secondary electron ionization coefficients in neon‐hydrogen, helium‐hydrogen, and neon‐argon mixtures using the Townsend technique. In these experiments, measurements have been conducted over a considerable range of pressures at the E/p₀ value corresponding to the maximum of the Penning effect and for the optimum concentrations. Examination of the prebreakdown current growth indicated at fixed E/p₀ a pressure‐dependent breakdown potential. Measurements of the primary coefficient as a function of pressure showed no significant pressure variation. Measurements of the secondary ionization coefficient, however, indicated that γ decreased with increasing pressure consistent with the observed breakdown potential variation.

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