Pulse generator development for low impedance loads

Summary form only given. An eleven stage flat top type output Marx utilizing sparkgap switches is operated to produce a desired 500 kV output at 10 Hz rep-rate with > 500 J pulse energy to drive a ~ 20 Ohm load. While this Marx generator utilizes custom-designed spark gaps, the significant progress in semi-conductor pulsed switching technology is evaluated through PSICE modeling of the semiconductor switches integrated into the Marx electrical model. The switches are experimentally evaluated at conditions that a single switch (stack) would experience in a full Marx generator. Alternatively to the Marx topology, the potential benefits of choosing a linear transformer driver (LTD) as a HPM pulsed power driver are evaluated. We note that the main advantage for the LTD is the savings in insulation material and size; the same semiconductor switches are utilized. The potential benefits of such a generator include significant reduction of electromagnetic noise, increased lifetime, improved reliability, and reduced maintenance.