Design of a system of high voltage pulsed power converters for CERN's Linac4 H− ion source

This paper presents the complete design and experimental validations of the full scale prototype of a system of three new high voltage pulsed power converters for the CERN Linac4 H^- source. The system requires three pulsed voltages (50kV, 40kV and 25kV to ground) at 2Hz repetition rate, for a 700μs of usable flat-top. The solution presents switching frequency ripple-free voltages and a minimal stored energy to protect the ions source from arc events consequences. The main design aspects are presented. Experimental results on the final full-scale prototype are presented and show excellent behaviour in nominal and short-circuit operations.