On the origin of partial discharges in condensed matter

Recent studies have shown that streamer growth in condensed matter is related to the occurrence of electrical and light pulses. These pulses are actually the same as those referred to as partial discharges. Based on these and other observations, it is shown that partial discharges are manifestations of electrical breakdown occurring within streamers (trees or bushes) that represent low-density regions within the dielectric and which start at the metal/dielectric interface. In the absence of streamers, trees or bushes, no partial discharges have been detected, thus providing experimental support for the authors´ conclusions. The significance of these findings is discussed in terms of their theoretical and practical significance