Study of RF coupling to dielectric loaded accelerating structures

A new method of coupling rf to an X-band dielectric loaded accelerating structure is described here. In common with a technique developed earlier [1] we taper the dielectric to obtain efficient coupling, but we also incorporate a mode conversion section that results in compactness, flexibility and improved resistance to breakdown at high power. Numerical results demonstrate that enhanced microwave transmission can be achieved with a shorter dielectric taper section. The dielectric taper can also be modified without redesign of the metal structure hosting the tapered section, resulting in time and cost savings during the development cycle.