High Voltage Solid State Trigger Generators

We have previously developed a low-inductance, dual- thyristor, switch module capable of operation at up to 8 kV and 14 kA with current risetimes of >25 kA/mus [1]. By integrating this module with a high voltage DC-DC converter and a control circuit, we have created a compact high voltage solid state trigger generator. Optically isolated control functions allow the trigger generator to float to the anode or cathode potential as needed. These systems can have a maximum operating voltage of 1 kV to 8 kV using a supply voltage of 5 VDC to 48 VDC. This paper will describe a 5 kV trigger generator with a voltage rise time of 40 ns that is used to trigger spark gaps. This generator would be suitable for replacing Krytrons. The switch module, DC-DC converter, and control circuits, are packaged in a 4" times 7" times 2.5" enclosure.