Design and Simulation of a High Frequency High Power Rf Extraction   Device Using a Dielectric-Loaded Waveguide
  We consider the use of a dielectric-loaded structure to extract rf energy from a high current electron drive beam as a power source for a high energy two-beam accelerator. This represents an alternative technique which we show to have some significant advantages over the use of the currently proposed corrugated metal structures as power extraction devices. We discuss a particular design that will extract high power rf (0.1 -- 1 GW) from a high current drive beam. Rf generation and transport in this class of devices have already been demonstrated at lower frequencies. We discuss the design parameters for 15 and 30 GHz dielectric transfer structures and some possible experiments. 
Wei Gai, Paul Schoessow