Spark gap synchronization using subnanosecond pulsur based on avalanche transistor

Design and implementation of a 20kV subnanosecond pulse generator using Avalanche transistor as a switch. The circuit with avalanche transistor as a switch and connected in a form of string could generate a very short pulse with high peak voltage. The avalanche effect of the transistor is responsible for the ultra-fast falling edge of the output pulse. The pulse hence generated can be used for synchronization of two or more spark gap. Because of the fast rise time and the high output voltage the reliability of the synchronization is increased. The Experimental output waveforms are shown.