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A theoretical approach for Townsend's first ionization coefficient in mixtures of gases

Estimation of breakdown voltages of mixtures of gases is usually done empirically due to the incomplete knowledge of the fundamental phenomena which give rise to breakdown in gaseous mixtures. In this paper it is shown that the first ionization coefficient in gaseous mixtures can be obtained theoretically with special reference to electronegative gases and their mixtures with ordinary gases. The calculated values of ∝/p (first ionization coefficient/pressure) according to the developed equation and the values existing in literature are in good agreement. This equation can be used in determining the current growth and in understanding the behaviour of Swarm coefficients in mixtures of gases.