Development of JT-60SA thermal shield components

Kamiya, Koji; Onishi, Yoshihiro; Furukawa, Masato; Yoshida, Kiyoshi

JT-60SA thermal shields consists of 3 main components; vacum vessel thermal shield, port thermal shield, and cryostat thermal shield. Those components further consists of multiple panels with a gap of 60 mm, which are mutually connected by couplers. In order to shield the radiation from the cryostat and from the plasma vacuum vessel, JT-60SA plans to cover the 60 mm gaps with stainless steel film (radiation cover). In this study, mechanical test results of electrically insulated cover will be reported. In the JT-60SA, gravity supports of toroidal field coils (TFC) will have the thermal anchor at the middle of the support from CTS. Since TFC and TS needs to be electrically insulated, the thermal anchors are electrically insulated. In this study, heat transfer test of the thermal anchor will be reported.