The paper describes a design for a linear accelerator that would reach 250GeV in center of mass frame and that may be extended to 550GeV (see section 2) and even multi-TeV (see section 5).
I was curious how this compares against LHC which Wikipedia [1] says reached record 13TeV total collision energy. However, it isn't clear whether Wikipedia cites energy in center of mass frame that could be directly compared.
Does anyone know how the two accelerators would compare in this respect? In particular, would the proposed C³ accelerator actually achieve higher total collision energy than LHC or is it instead hoped that future extensions of a C³ accelerator would exceed LHC's capabilities?