Development of a coaxial 95 GHz, multi-megawatt gyrotron oscillator

As part of an ongoing program to develop a high power mm-wave source for use on a mobile platform, CPI is developing two prototype gyrotrons designed to produce more than 2 MW of output power at a frequency of 95 GHz. The first prototype employs a cylindrical noncoaxial interaction circuit designed to operate in the TE_22,6 mode, and is currently undergoing preliminary factory testing (discussed at the conference). The second prototype will be essentially identical to the first, but with the addition of a coaxial rod inserted through the center of the cavity. The motivation for this experiment, the implementation approach, and the simulations upon which the coaxial design is based will be discussed.