We report on an experimental study of the behavior of a nanosecond-pulsed plasma discharge in air near the critical point. The plasma discharge was generated by a voltage pulse of 10ns duration with amplitude up to 8kV, applied between two pin electrodes separated by a gap distance of 25 μm. The breakdown voltage and associated current were measured. The total electrical energy deposited per pulse was about 200 μJ. The results show a non-linearity of the plasma behavior at the critical point of air. An explanation is proposed based on strong density fluctuation characteristics of fluid behavior near the critical point.
ASJC Scopus subject areas
- Condensed Matter Physics