Modular Trigger Generator for an Overvoltage-Triggered Marx Generator

Overvoltage triggering of a spark gap enables a synchronized operation of several Marx generators in repetitive operation without an increased wear of the electrodes. In order to generate the trigger pulses and apply them to one spark gap of a Marx generator, a modular semiconductor-based pulse generator in combination with a transformer has been developed. As the power required for triggering depends on stage voltage and stray capacitance values of the Marx generator, a modular setup enables an easy adaptation of the trigger generator design to different types of Marx generators. The trigger generator consists of several stacked stages, each equipped with its own power supply and pulse generator on stage potential. Each stage is supplied by the charging current of the Marx generator. This paper describes the new design of the trigger generator and compares it to the already existing design of a compact trigger generator.