High frequency pulses occurring in 60 cycle discharges in dielectric voids

A sufficiently high a.c. voltage impressed upon a sample of dielectric containing a void will result in discharges (corona) in the void, and thus to degradation of the dielectric. The discharge current is in the form of very rapid pulses, <; 0.1 μsec in duration, and it is the ultimate purpose of this work to examine the factors controlling the number and size of these pulses and to correlate these quantities with the chemical degradation obtained.