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Characterization of the W7-X scrape-off layer using reciprocating probes

Carsten Killer, Olaf Grulke, Philipp Drews, Yu Gao, Marcin Jakubowski, Alexander Knieps, Dirk Nicolai, Holger Niemann, Aleix Puig Sitjes, Guruparan Satheeswaran2019年被引用 33Nuclear FusionIF 3出版社

The W7-X scrape-off layer (SOL) with its characteristic magnetic island chain has been investigated using electric probes mounted on a reciprocating manipulator close to the outboard mid-plane. A survey of the W7-X configuration space shows that the presence and particular topology of magnetic islands significantly affects the SOL profiles of electron temperature, density, electric field and plasma flows. Particularly relevant for divertor operation, very wide SOL heat flux profiles have been observed in some magnetic configurations, which we link to the presence of magnetic islands. In these situations, the islands can feature a local minimum of the plasma potential accompanied by a direction reversal of driven dynamics measured by probe arrays.

日本語訳

W7-Xのスクレイプオフ層(SOL)は、その特徴的な磁気島構造を有しており、外側赤道面近傍の往復マニピュレータに取り付けられた電気プローブを用いて調査された。W7-Xの配位空間の調査により、磁気島の存在とその特異なトポロジーが、SOLにおける電子温度、電子密度、電場、およびプラズマ流の分布に顕著な影響を及ぼすことが示された。特にダイバータ運転に関連して、いくつかの磁気配位において非常に広いSOL熱流束分布が観測されており、これは磁気島の存在と関連付けられる。これらの状況では、磁気島はプラズマ電位の極小値を特徴とし、プローブアレイによって測定された駆動ダイナミクスの方向反転を伴うことがある。

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Scrape-off layerW7-X
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