A new structure with continuous RF acceleration and focusing

A new design for an accelerating structure in which charged particles experience continuous acceleration and focusing is proposed. The structure is excited in the TM mode (not RFQ TE mode). Our calculations show high intercell coupling for the RF flow at no loss of efficiency in comparison to other RF structures. This makes the structure insensitive to manufacturing and misalignment errors. Manufacturing, assembly, and tuning should not be difficult. Our design can be scaled to operate over a broad range of wavelengths and can be made from superconductive material. Our calculations show that the structure can efficiently accelerate a wide range of particles, from low velocity ions to high energy electrons. Thus, it can bring particles from energies of several MeV (right after RFQ pre-acceleration) to hundreds of MeV. Our conclusions are based on the results of three-dimensional numerical simulations