Injection optimization through generation of flat ion beams

Abstract An excellent interfacing between injector linac and synchrotron is mandatory to provide ion beams of unprecedented intensities and qualities. One consequence of the single-plane Multi-Turn Injection (MTI) is that the required injection emittance for the injection plane (usually the horizontal one) is very demanding; to the other plane not. Re-partitioning of the injected beam emittances, i.e. round-to-flat transformation would increase the injection efficiency. This benefit effect to the MTI performance of a smaller emittance has been measured as a function of the amount of flatness of the beam. An excellent agreement between simulation and measured injection performance as a function of the injected emittance was achieved thanks to fast adjustment of the beam flatness without changing other beam parameters.