Abstract
The properties of the cathode-directed positive streamer discharge, propagating in a uniform electric field, have been investigated. Precautions have been taken to keep the effects of space charge, due to branching, to a minimum, and conditions under which streamers possess minimum initial energy have been obtained. In this way, a threshold field of 440 kV m-1 for the propagation of a single streamer has been determined. The velocity of streamers in the uniform field has been studied. This rises linearly with the electric field and the results confirm that space-charge effects are negligible. Comparison is made with previously published work.
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