Pulsed Electric Strength and Full-Voltage Effect

Experimental data for breakdown delay time in vacuum, which are received in electric fields of various degree of heterogeneity for pulses of different shape and duration, are analyzed and generalized. The results, which are obtained at differ experimental conditions under optimum performances of pulsed conditioning, are given rise to the conditions of uniform field and rectangular pulse with duration, t_p1=0.5 mus. The united dependences of breakdown voltage U _br(d) and electric strength E₀(d) on interelectrode distance are obtained. Taking into account full-voltage effect, the curves of U_bT(d) and E₀(d) were plotted in the range of gap spacing of 3middot10^-3lesdles 2middot10² mm, which overlaps five orders of magnitude. It is shown that the electric strength rises and the breakdown voltage decreases in the ranges of 2.5middot10⁷lesE₀les7.5middot10⁸ V/m and 5middot10³ lesU_br les 2.5 kV with distance decrease from 20 cm down to 3 mum