X-band RF photoinjector design for the CompactLight project

RF photoinjectors have been under development for several decades to provide the high-brightness electron beams required X-ray Free Electron Lasers. This paper proposes a photoinjector design that meets Horizon 2020 CompactLight study requirements. It consists of 5.6-cell, X-band (12 GHz) gun, an emittance-compensating solenoid and two traveling-wave structures accelerate beam out space-charge-dominated regime. The gun is intended operate with cathode gradient 200 MV/m, TW at 65 MV/m. shape cavity cells was optimized reduce peak electric surface field. An assessment breakdown likelihood presented as multipacting analysis coaxial coupler. pulse heating on inner surfaces also evaluated dynamics simulations 100 MeV are summarized.