Recent progress on a co-harmonic gyrotron

Results from numerical simulations have demonstrated the principle of a co-harmonic gyrotron, operating with a novel cavity. Such a cavity is capable of generating coherent radiation at both the 2^nd and 4^th harmonics of the electron cyclotron frequency simultaneously, at frequencies of 37.5 GHz and 75 GHz. Further results are presented here, including refinements to the output section of the cavity, as well as on the on-going testing of the cavity and its associated components, which are required to generate the operating modes of interest.