ИСТИНА

The radiation decay of the sliding surface discharge and of the combined volume discharge with plasma electrodes lasting hundreds of nanoseconds in air have been studied experimentally by means of time resolved nanosecond ICCD imaging and streak diagnostics of the discharges development. Investigations were carried out at a voltage of 20-30 kV at air pressure of 2-160 torr. Analysis reveals the differences in the character of the radiation decay of two types of discharges. The radiation decay time of volume discharge decreases with increasing pressure at pressure of 10-100 torr. The decay time of the diffuse channels of sliding surface discharge is almost constant at pressure below 60 torr and increases at higher pressures.