  The physics of self-sustained oscillations in the phenomenon of positive glow
corona is presented. The dynamics of charged-particle oscillation under static
electric field has been briefly outlined; and, the resulting self-sustained
current oscillations in the electrodes have been compared with the measurements
from the positive glow corona experiments. The profile of self-sustained
electrode current oscillations predicted by the presented theory qualitatively
agrees with the experimental measurements. For instance, the experimentally
observed saw-tooth shaped electrode current pulses are reproduced by the
presented theory. Further, the theory correctly predicts the pulses of
radiation accompanying the abrupt rises in the saw-tooth shaped current
oscillations, as verified from the various glow corona experiments.
