UPDATE OF BEAM OPTICS AND SRF CAVITIES FOR PROJECT X

The Project X staging [1] requires reconsideration of the beam optics and thus, the SRF system for the 3 GeV Project X CW linac. The revised beam optics, a new concept of the linac segmentation and an update on the cavities are presented in the paper. The new versions for the Project X cryo-modules for the SSR2 section, lowbeta 650 MHz section and high-beta 650 MHz section are discussed. The beam separation scheme at 1 GeV is also discussed.