Final Design And Cold Tests Of A Harmonic Ubitron Amplifier

A harmonic ubitron amplifier has been designed and is nearing final assembly. The experiment is intended to be a proof-of-principle study of the feasibility of harmonic operation of the ubitron. Harmonics are a key in reducing the high-voltage requirements of ubitrons. The configuration of the experiment consists of a 250 kV/100 A electron gun, an input transition from single-mode to overmoded waveguide, a linear wiggler, mode-selective output couplers and a calorimeter/water load. The design and goals of the overall experiment will be discussed along with the design and test results of individual components.