Self-sustained space discharge

The state-of-the-art in the physics of large-volume high-power gas discharg es is reviewed. The characteristic properties and distinguishing features o f high-pressure self-sustained discharges are discussed, existing experimen tal data are presented, and major formation and constriction models conside red. It is shown that the lower bound on the discharge ignition voltage is due to the onset of cathode instability. Relations between the discharge pa rameters at the glowing and power delivery stages are analyzed. Record disc harge characteristics are presented and difficulties involved in constructi ng a comprehensive theory of this type of discharge are pointed out.