Feasibility study of accumulator and compressor for the 6-bunches SPL based proton driver

Feasibility studies of the accumulator and the compressor rings for the SPL based proton driver have been studied for a future neutrino factory. The scenario retained for the SPL proton driver uses six bunches, with 10^14 protons in total at 50 Hz. Possible lattices for the accumulator and the compressor are presented. The beam injection/accumulation and the bunch compression are delicate issues and discussed in detail in this note. Throughout the presented study, these difficulties are disclosed not to be critical issues, and together with a discussion on the focusing towards production target, the feasibility of the 6-bunches SPL based proton driver has been confirmed