Integral split ring resonator loaded with drift tubes and RF quadrupoles

In order to improve the mechanical stability, the coupled split ring (also spirals) resonators, loaded either with drift tubes or RF Quadrupoles, are integrated together through conducting bars. Investigations on 1/2 and full scale models (50 cm in tank diameter) show considerable improvement on the overall rigidity of the structure while keeping the RF efficiency high. The operating frequency can be greatly reduced by the integration to 24 and 14 MHz for loading with drift tubes and RFQ respectively. The integration also flattens the accelerating voltage distribution and enhances the mode separation and thus facilitates the assembling and commissioning of the accelerating structure. An equivalent circuit of the integral split ring, which agrees well with the experiments, has been developed