Recent development and testing of megawatt-class gyrotrons

Communications & Power Industries (CPI) has recently fabricated two gyrotrons designed to produce a megawatt of output power. The first system is a 110 GHz, 1.2 MW, 10-second-pulse gyrotron to be used for electron cyclotron heating and current drive on the DIII-D tokamak at General Atomics (GA). This gyrotron has completed factory testing, where it demonstrated 1.2 MW output power for short pulses, and 480 kW output power for 10-second pulses at the 25-A CW current limit of CPI´s test facility. It has been shipped to GA, where it will be tested to full parameters (1.2 MW, 10 seconds). The second system is a 170 GHz, 500kW-1MW, CW gyrotron to be used by the U.S. ITER team for ECH transmission line component testing and qualification. This gyrotron is currently (as of June 2012) being factory tested.