Improved Hybrid MOSFET/driver Switching Module for pulsed power applications

Currently, there is no commercially available high voltage power MOSFET suitable for ultra-fast (~1ns switching) short pulse (~5ns) generation. A Hybrid MOSFET/driver Switching Module (HSM) has been demonstrated at the SLAC National Accelerator Laboratory, which is capable of generating a 1 kV, 1 ns rise time pulse across a 30 ohm load. This HSM is under development for use in the ILC damping ring kickers, which require modulators that can deliver ±5 kV pulses with a 2 ns flattop and 1 ns rise and fall time at a 6 MHz burst pulse repetition frequency. The HSM is also very attractive for the proposed Project X broadband chopper which requires similar switching speed (~1 ns) and pulse width (~4 ns). A second generation HSM is under development with improved modularity, increased power handling capability, and reduced minimum pulse width. Details of this HSM design and initial test results are presented in this paper.