Realization of cavity and drift space designs for a 30 MW, 10 GHz gyroklystron

The final preparations for bringing the University of Maryland 10-GHz, 30-MW gyroklystron experiment online are underway. Successful operation of this device will surpass the state-of-the-art in power capability by three orders of magnitude and will establish the gyroklystron as a primary candidate for driving high-energy linear colliders. The low Q of the input cavity is realized by two thin, carbon-impregnated aluminosilicate annuli located on either end of the cavity at the outer radius. Cold tests have revealed that the required frequency and Q can be achieved with such absorbers. A scattering matrix code was modified to include lossy dielectrics and was successfully compared to analytic results in simple geometries with lossy dielectrics and numerical codes in complex geometries with loss-free dielectrics. >