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Imaging bolometer for a burning plasma experiment

燃焼プラズマ実験のためのイメージング・ボロメータ

Peterson, B. J.*; 芦川 直子*; 木島 滋; Ingesson, L. C.*; Walker, C. I.*

Peterson, B. J.*; Ashikawa, Naoko*; Konoshima, Shigeru; Ingesson, L. C.*; Walker, C. I.*

赤外カメラを用いて温度上昇を直接測定するイメージング・ボロメータが核融合科学研究所で開発されている。一方、金薄膜を用いる従来の抵抗型ボロメータは中性子照射にぜい弱であることも明らかになってきた。JT-60Uトカマク用イメージング・ボロメータの設計や国際熱核融合実験への適合性の検討を開始した。感度,分解能,長時間特性などについてイメージング・ボロメータの燃焼トカマク実験への適用の検討結果を報告する。

Research and development of imaging bolometers has progressed from the Segmented Mask IR Imaging Bolometer to the IR Imaging Video Bolometer (IRVB). Meanwhile tests of conventional resistive bolometers have shown their weakness to the high neutron flux. In this paper we compare the IRVBs currently installed in the Large Helical Device with a conceptual design for the JT-60U tokamak and a feasibility study for the International Thermonuclear Experimental Reactor. Comparisons are made with conventional resistive bolometers in terms of sensitivity, spatial and time resolution, port access requirements, steady-state operation, long term durability and shielding of stray ECH power.

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