Applicability of simple expressions for electrical breakdown probability in vacuum

Simple analytical expressions for the law of breakdown probability are suggested. They are tested by comparison with experimental data obtained by impulse breakdown in 10-Pa vacuum for very small gaps (d >

[1]  B. Mazurek,et al.  An Energy Explanation of the Area Effect in Electrical Breakdown in Vacuum , 1987, IEEE Transactions on Electrical Insulation.

[2]  Y. Murai,et al.  Statistical Property of Breakdown Between Metal Electrodes in Vacuum , 1981, IEEE Transactions on Power Apparatus and Systems.