Self-sustained space discharge

The state-of-the-art in the physics of large-volume high-power gas discharges is reviewed. The characteristic properties and distinguishing features of high-pressure self-sustained discharges are discussed, existing experimental data are presented, and major formation and constriction models considered. It is shown that the lower bound on the discharge ignition voltage is due to the onset of cathode instability. Relations between the discharge parameters at the glowing and power delivery stages are analyzed. Record discharge characteristics are presented and difficulties involved in constructing a comprehensive theory of this type of discharge are pointed out.