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Divertor for W7-X: II. Comparison of island andaxisymmetric divertor

Ralf Schneider, Hermann Renner, Xavier Bonnin, David Coster, Josef Neuhauser2002年Plasma Physics and Controlled FusionIF 2.2出版社

The need for sufficient power and particle exhaust is common to allmagnetic confinement concepts. For the new stellarator W7-X,making use of the intrinsic island structureat the edge, an island divertor is planned.The concept of the W7-X island divertor (as a prototype of generalisland divertors) and its specificdesign criteria will be presented. A comparison of the basic physics guidelines for divertor design with axisymmetricdivertors (specifically with the ASDEX-Upgrade Div-II configuration)will be made. The common elements (general scrape-off layer physicsdue to the dominant parallel transport and atomic physics effectsthrough neutrals) and possible differences (three-dimensional effects,differences in field-line geometries, additional flexibility throughdivertor coils, possible ergodicity in some configurations, corebaffling of neutrals)will be discussed.

日本語訳

十分な出力と粒子排気の必要性は、すべての磁気閉じ込め方式に共通する。新型ステラレーターW7-Xでは、周辺部の固有アイランド構造を利用し、アイランドダイバータが計画されている。W7-Xアイランドダイバータの概念(一般のアイランドダイバータの原型として)と、その具体的な設計基準について述べる。軸対称ダイバータ(特にASDEX-Upgrade Div-II配置)との設計に関する基礎的な物理指針の比較を行う。共通する要素(支配的な平行輸送と原子物理効果による中性粒子を介した一般的なスクレイプオフ層物理)および相違点(三次元効果、磁力線幾何学の差異、ダイバータコイルによる追加の柔軟性、一部の配置における可能なエルゴード性、コアへの中性粒子のバッフリング)について議論する。

装置

wendelstein-7x高精度(タイトル一致)asdex-upgrade中精度(概要文一致)

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DivertorW7-X
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