Improved design of an ITER equatorial EC launcher

Takahashi, Koji; Kajiwara, Ken; Kobayashi, Noriyuki; Kasugai, Atsushi; Sakamoto, Keishi

The development of an ITER equatorial EC launcher for the improved design has being proceeded. The sustainable design of the front shield modules against electromagnetic forces was analytically obtained. The steering mirror mock-up including the spiral cooling tubes was fabricated based on the present design with application of hot isostatic pressing technique to bond the copper alloy mirror body and the embedded stainless steel cooling tubes. The test of water flow was carried out and the expected flow rate was successfully obtained. A quasi-optical transmission layout has been proposed instead of the waveguide lines. It is verified that transmission loss at the QO region is 1.12.2%, which is comparable to the reference design. The peak heat load on the steering mirror surface could be reduced by 55%, which makes the mirror design relaxed.