Progress on the development of the EU-1 MW gyrotron for ITER

EU is presently developing a 1 MW, 170 GHz cylindrical cavity gyrotron for ITER. This activity was initiated in 2008 as a risk mitigation measure in parallel with the development of a 2 MW coaxial-cavity gyrotron, and in 2012 became the main line. In the previous year, the scientific designs of the 1 MW gyrotron components, such as the electron gun, beam tunnel, cavity, quasi-optical output coupler and single-stage depressed collector have been finalized. In addition, in collaboration with the European industrial partner Thales Electron Devices (TED), after completion of the industrial design of the technological parts of the gyrotron, the procurement and manufacturing of subassemblies for a 1 MW CW prototype will start in 2014. Its specifications correspond to the ITER requirements.