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Ciel: Tore Supra's new power and particle extraction environment

Pascal Garin2000年Fusion Engineering and DesignIF 1.7出版社

AbstractThanks to its superconducting magnet which enables potential steady plasma discharges, Tore Supra is the biggest tokamak in the world today capable of facing physics, experimental and technological issues necessary to prepare very long discharge operation of next step devices. The limited capacity of present plasma facing components (including antennas) to extract high thermal fluxes in permanent regime, the poor pumping set-up installed in the machine are today limitations which must be overcome. A new heat and particle extraction environment has thus been launched in February 1996, and is called CIEL (Inner Components and Limiter, ‘Composants Internes et Limiteur’). The paper describes this new plasma facing environment, which is designed to extract 25 MW of power, 15 MW convected on a toroidal pump limiter (TPL), the remaining radiated 10 MW being absorbed by a set of stainless steel panels and bumpers covering the inner vessel. Pumping is provided by a set of 12 quadruplets of neutralisers located below the limiter throat and connected via ducts to cryomechanical pumps. Measurement of the limiter surface temperature is devoted to a set of infrared cameras, also used for its safety.

日本語訳

超伝導磁石により定常プラズマを可能にするTore Supraは、次世代装置の超長時間放電運転に必要な物理的、実験的、技術的課題に取り組むことができる世界最大のトカマクである。定常状態における高熱流束を抽出する現行のプラズマ対向機器(アンテナを含む)の限界、および装置に設置された排気能力の不足は、今日克服すべき制約である。このため、新たな熱・粒子排気環境が1996年2月に立ち上げられ、CIEL(内部コンポーネントおよびリミター、『Composants Internes et Limiteur』)と名付けられた。本論文は、この新たなプラズマ対向環境について述べるものであり、これは25 MWの電力を抽出するよう設計されており、うち15 MWはトロイダルポンプリミター(TPL)にて対流により除去され、残りの10 MWの放射電力は、真空容器内壁を覆うステンレス鋼製パネルおよびバンパーにて吸収される。排気は、リミタースロート下方に設置され、クライオメカニカルポンプにダクトで接続された12基の四重極排気ユニットによって行われる。リミター表面温度の計測は、安全性確保も兼ねて、一連の赤外線カメラによって実施される。

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