Electrical, optical and x-ray diagnostics of subnanosecond breakdown in gases

Abstract

Subnanosecond gas breakdown research is important for application in ultra-wideband radar (UWB), plasma limiters, and high speed switches for use in pulsed power applications. This paper contains breakdown data taken for voltage pulses having amplitude 150 kV and risetimes on the order of 250 ps. Voltage, current, and breakdown time constants are described in this paper for volume breakdowns and surface flashovers. In addition, the x-ray emission and the luminosity were measured. All results point to the importance of runaway electrons for this discharge regime.