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 operatin g in a TM0n0 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 th al 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 wa lls reduces the ohmic losses by effectively increasing the skin depth.