Development of 300 kV pulse source with 3 ns risetime

A high voltage pulse source with 300 kV peak voltage and less than 3 ns risetime was developed. The peaking circuit which consists of a peaking capacitor and an output switch is the key part of this source. The primary requirement of the peaking circuit is decreasing its stray inductance as low as possible for getting a fast risetime. Compact structures were designed especially for the peaking capacitor, the output switch and their connection. The peaking capacitor is made of three coaxial foil capacitors connected in series and the special gap structure at the end of each electrode is designed for improving its insulating ability. This capacitor can endure more than 300 kV pulse voltage with 17 ns risetime. The output switch is a SF6 gas switch with high pressure (up to 1.0 MPa) and small