New injection kicker modulators for HLS ring

This paper describes the new injection kicker modulators for HLS ring. In the new injection system, each kicker drives two kicker magnets in a parallel mode. The modulators can deliver a half-sine wave current with a bottom width of 3.5 /spl mu/s, a peak current of 10 kA at the max repetition rate of 2 Hz. The 27 kV capacitor-charging circuit is based on constant-current, series-resonant, switching techniques. Simulated and measured waveforms of charging circuit are given. Basic formulae of designing a switching-mode series-resonant charging circuit are provided. Local control of the modulators is based on PLCs. Ladder Relay Logic program and performance of PLC controlling is described too.