Simulation of a resonant-type ring magnet power supply with multiresonant cells and energy storage chokes

For the TRIUMF KAON factory booster ring, a resonant-type magnet power supply has been proposed for the dipole magnet excitation. The authors present the analysis of operating conditions of the resonant-type ring magnet power supply with multiple resonant cells, using the circuit simulation tool SPICE. The focus of the study is on the effect of circuit parameter variations in energy storage chokes. The resonant frequency drift is shown to be the most serious factor in designing the energy make-up DC power supply. There is a tradeoff between the allowable range of resonant frequency drift and the cost of energy make-up networks. The parameter variation among resonant cells is the source of the nonsymmetrical resonant modes in the power supply operating conditions. The resonant frequency variation is again the most sensitive factor. Due to the interdependence of multiple resonant cells, however, the effect of resonant frequency variation among resonant cells is not so dramatic as the effect of resonant frequency drift, as far as the current gain of the resonant system is concerned.<>