Progress in Development and Fabrication of the JT-60SA ECH/CD System

Development of the ECH/CD system for JT-60SA has been progressed. (i) A full length (~7 m) mock-up of the mirror steering structure of the launcher has been successfully tested in vacuum. The required life without maintenance, which is 105 cycles for the poloidal steering range of 60° and 104 cycles for toroidal beam steering range of 30°, has been achieved. A newly introduced solid lubricant enabled the smooth movement of the steering shaft. (ii) The temperature rise distribution of aluminum waveguides has been measured at high-power of 0.5 MW. It is in the range from 0.2 to 1.2 °C per 1 MJ transmission and acceptable for 1 MW/100 s transmission required in JT-60SA. (iii) The preparation of the JT-60SA ECH/CD system toward first plasma experiment is smoothly progressing by the above results and the successful gyrotron development.
27th IAEA Fusion Energy Conference (FEC 2018)