Complementary split-ring resonator-based accelerating structure

We describe a novel particle accelerating structure consisting of Complementary Split-Ring Resonators (C-SRRs) etched into the lower and upper walls of a copper rectangular waveguide. Outer cylindrical cavities enclosing the C-SRR sections allow a vacuum to be maintained. The accelerating gradient of a 1 GHz cavity is simulated to be 8.76 MVm, when referenced to the actual accelerating gap, for only 10.7kW of input power. Particle simulation results confirm the efficacy of the proposed structure. A simple analytical model of the structure is given as a design aid to compute the relationship between the key geometrical parameters and the resonance frequency.