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The power supply studies for the four-horn system for the CERN to Fr\'ejusneutrino Super Beam oscillation experiment are discussed here. The power supplyis being studied to meet the physics potential and the mega-watt (MW) powerrequirements of the proton driver of the Super Beam. A one-half sinusoidcurrent waveform with a 350 kA maximum current and pulse length of 100 \mu s at50 Hz frequency is generated and distributed to four-horns. In order to providethe necessary current needed to focus the charged mesons producing the neutrinobeam, a bench of capacitors is charged at 50 Hz frequency to a +12 kV referencevoltage and then discharged through a large switch to each horn via a set ofstrip-lines at the same rate. A current recovery stage allows to invert rapidlythe negative voltage of the capacitor after the discharging stage in order torecuperate large part of the injected energy and thus to limit the powerconsuption. The energy recovery efficiency of that system is very high at 97%.For feasibility reasons, a modular architecture has been adopted with 8 modulesconnected in parallel to deliver 44 kA peak currents into the four-horn system.

Study of the pulse power supply unit for the four-horn system of the CERN to Frejus neutrino super beam