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Progress in the design of the ITER poloidal polarimeter

ITERポロイダル偏光計測装置の設計の進展

河野 康則; 石川 正男; 佐藤 和義; 今澤 良太; 草間 義紀; 林 利光; 小野 武博; 海老澤 克之*; 若林 邦朗*; 平松 美帆*; 清原 通雄*; 清原 元輔*

Kawano, Yasunori; Ishikawa, Masao; Sato, Kazuyoshi; Imazawa, Ryota; Kusama, Yoshinori; Hayashi, Toshimitsu; Ono, Takehiro; Ebisawa, Katsuyuki*; Wakabayashi, Kuniaki*; Hiramatsu, Miho*; Kiyohara, Michio*; Kiyohara, Motosuke*

On the ITER project, Japan will procure the poloidal polarimeter for the measurement of plasma current profile at the core region of ITER plasmas. For the measurement, change in polarimetric properties of probing laser beams that pass through the plasma is detected. At this meeting, progress in the design of the poloidal polarimeter is presented including following key topics. (1) Arrangements of plasma-facing first-mirrors and second mirrors in the upper and the equatorial port plugs are investigated. An initial result from thermal analysis for the first mirror is also shown. (2) The design of the retro-reflector is updated with investigation of its practical procedures of fabrication and installation. The retro-reflectors are installed at the blanket modules and the divertor cassette to reflect back the probing laser beams to the diagnostic hall.

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