Theory for a cylindrical pillbox accelerator cavity using layered structures for reducing skin-effect losses

It is shown that for a cylindrical pillbox accelerator cavity operating in a TM_0n0 mode, the use of laminated conductors for the flat walls in conjunction with a multilayered dielectric structure for the round walls can decrease skin-effect losses by an order of magnitude over that of a copper cavity having the same accelerating field. The layered dielectric structure for the round walls works in a fashion similar to a quarter-wave interferometer. The laminated conductor on the flat walls reduces the ohmic losses by effectively increasing the skin depth