Progress in ECH/CD launcher development for JT-60SA

Kobayashi, Takayuki; Hiranai, Shinichi; Sawahata, Masayuki; Terakado, Masayuki; Wada, Kenji; Hinata, Jun; Sato, Fumiaki; Yokokura, Kenji; Hoshino, Katsumichi; Takahashi, Koji; Oda, Yasuhisa; Ikeda, Ryosuke; Isayama, Akihiko; Moriyama, Shinichi

A mechanical structure of the launcher for electron cyclotron heating and current drive in JT-60SA has been designed to realize wide range of poloidal and toroidal injection angles with high reliability. One of the key components is a bellows structure (vacuum boundary) enabling linear and rotation motions of the rigid shaft. A full scale mock-up of the bellows structure has been fabricated and tested. The linear motion was repeated 100,000 cycles and the rotation motion was repeated 10,000 cycles. In this test, no evidence of vacuum leakage was observed. Then, the mock-up has been extended up to the first mirror including full length of the steering shaft (~4 m) and bearings. The cyclic test of the full system of the driving structure will be carried out in 2015. A mock-up of M2, which is a large curved mirror including four cooling channels, has been designed and fabricated. It was experimentally confirmed that the flow rate of each cooling channels was consistent with the design.