Bubble generation model for initiating breakdown from anode in n-hexane with quasi-uniform electrical fields

A physical model of bubble stage generation with initiating an electrical discharge from anode in quasi-uniform fields, is suggested. The model implies field enhancement near the top of a sharp microtip on the electrode surface, field ionization, fast local liquid heating and microbubble spontaneous generation. The model permits us to determine a relationship between the statistical delay times of the discharge and the liquid properties, local field intensity and external pressure. The calculated statistical delay times of a discharge in n-hexane versus the external pressure are in good correlation with their experimental values.