Self-synchronization and auto-oscillations in discharge phenomena

The discharges in conductive and distilled water occurring near two electrode tips and in the vicinity of two holes of thin dielectric film are investigated. The simultaneous plasma generation is observed in the sites with maximum strength without gap breakdown. Moreover, the periodical auto-oscillations of a vapor-gas bubble and relaxation electrical current oscillations during discharge in a hole are revealed. The auto-oscillations are existed in a range of voltage between 100 V and 10 kV. The experiments have been performed in a range of liquid conductivity between 0.0014 and 22 /spl Omega//sup -1/m/sup -1/.