Abstract:
Marx generators can produce high voltage pulses using multiple, identical stages that operate at a fraction of the total output voltage without the need for a step-up transformer that limits the pulse risetimes and lowers the efficiency of the system. Each Marx stage includes a capacitor or pulse forming network and a high voltage switch. Typically, these switches are spark gaps resulting in Marx generators with low repetition rates and limited lifetimes. The development of economical, compact, high voltage, high di/dt, and fast turn-on solid state switches makes it easy to build economical, long lifetime, high voltage Marx generators capable of high pulse repetition rates. We have constructed a Marx generator using our 24 kV thyristor-based switches, which are capable of conducting 14 kA peak currents with ringing discharges at > 25 kA/μs rate of current risetimes. The switches have short turn-on delays, less than 200 ns, low timing jitters and are triggered by a single 10 V isolated trigger pulse. This project will include a description of a 4-stage solid state Marx and triggering system.
