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Particle control and SOL plasma flow in the W-shaped divertor of JT-60U tokamak

N Asakura, H Takenaga, S Sakurai, H Tamai, A Sakasai, K Shimizu, G D Porter2002年Plasma Physics and Controlled FusionIF 2.2出版社

Effect of divertor pumping on the scrape-off layer (SOL) plasma and impurities has been studied in many divertor tokamaks. Recent experimental studies of particle exhaust and SOL flow in JT-60U are reviewed. Pumping flux at the inner and outer pumping slots of the W-shaped divertor was investigated under the attached and detached divertor conditions. The SOL flow pattern was determined, for the first time, at three locations, i.e. at the low-field-side SOL (the outer midplane and divertor X-point) and at the high-field-side SOL (above the inner baffle), using three reciprocating Mach probes. The measured profiles were compared with modelling results from two-dimensional plasma simulations, UEDGE-code, with the ion drift effects included.

日本語訳

ダイバータ排気がスクレイプオフ層(SOL)プラズマおよび不純物に及ぼす影響は、多くのトカマク装置で研究されてきた。JT-60Uにおける粒子排気とSOL流の最近の実験研究を概説する。W字型ダイバータの内側および外側排気スロットにおける排気フラックスを、アタッチドおよびデタッチドダイバータ条件下で調査した。SOL流の分布は、3つの往復プローブを用いて、低磁場側SOL(外側ミッドプレーンおよびダイバータX点)と高磁場側SOL(内側バッフル上方)の3箇所で初めて測定された。測定された分布は、イオン反跳効果を含む2次元プラズマシミュレーションであるUEDGEコードによるモデリング結果と比較された。

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DivertorScrape-off layerJT-60UPlasma flow
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