Development of a 26 GHz RF Power Extractor

In normal-conducting high gradient accelerating structures, designs are moving toward higher frequencies. The same is true for other microwave applications like radar or communications. This project will develop a new high power radio frequency (RF) source that covers the frequency spectrum from Ku to low Ka band (20-30 GHz). In particular, a prototype power extraction structure will be experimentally evaluated using the beam facilities at Argonne National Laboratory. The prototype structure will incorporate advanced low loss dielectric materials to produce 26 GHz RF when energized by a high current electron bunch train. In Phase I, the prototype 26 GHz dielectric loaded structure will be fabricated and cold tested to verify efficient power transfer from the structure. Numerical simulations of beam interaction with the structure will be carried out. Commercial Applications and other Benefits as described by the awardee: The new RF power source should permit the construction of advanced, efficient linear accelerators for high energy physics research. The availability of a high power 26 GHz source also should be useful for radar systems, remote sensing, and communications.