Failure of Paschenrsquo;s scaling law for Nehyphen;0.1percnt; Ar mixtures at high pressures

摘要

The criterion for voltage breakdown in Nehyphen;0.1percnt; Ar mixtures is generalized to include the pressurehyphen;dependent conversion of atomic to molecular neon ions. A strong dependence of the Paschen curve on gas pressure results by incorporating a significant difference in the secondary electron coefficients for the atomic and molecular neon ions. The effective secondary emission coefficient ggr; of the gas mixture now becomes pressure dependent. The deviation from Paschenrsquo;s law observed recently in ac plasma display panels is accounted for by the present theory to the extent that it shows qualitatively all the important characteristics of the experimental results.