Abstract
A new method is proposed for initiating long ( 0.5 m) spark discharges over the surface of an insulator: it does not require the use of hard electrical circuits (i.e., having a high U0/L0 value) or high operating and ignition voltages (U 25 kV), but provides temporally and spatially stable plasmas of a specified geometrical shape and, in particular, in the form of strictly linear plasma channels. An experimental investigation was made of the dynamics of formation and of the energy and spectral-brightness characteristics of high-current radiating discharges of a new type in the form of surface discharges having a linearly stabilized streamer (spark) channel. Discharges of this type can be used as high-power open sources of continuous pulse-periodic radiation of large size and having a high ( 40 kK) brightness temperature in the ultraviolet spectral region.
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