A method and system for beam deflection. The method and system for beam deflection comprises a compact superconducting RF cavity further comprising a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode; a plurality of cells configured to provide a high operating gradient; at least two pairs of protrusions configured for lowering surface electric and magnetic fields; and a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.
STATEMENT OF GOVERNMENT RIGHTS
 This invention was made with government support under the Fermi Research Alliance, contract no. DE-AC02-07CH11359 awarded by the Department of Energy. The government has certain rights in the invention.