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Formation and structure of internal and edge transport barriers

E J Synakowski1998年Plasma Physics and Controlled FusionIF 2.2出版社

The phenomenology of transport barrier formation is reviewed with a focus on physics that may be common to the edge and the core. To this end, the framework of velocity shear reduction of turbulence-induced fluxes, applied to the edge for some time, is studied in the light of measurements of core bifurcation dynamics and recent tests of causality. Also, the possible role of the magnetic shear structure in facilitating core barrier formation is examined. Experimental and theoretical challenges for developing a predictive capability for reactor-relevant conditions are highlighted by recent observations of spontaneous electric field shear generation far removed from edge effects, and efforts to characterize the plasma edge at and across the L-H transition.

日本語訳

輸送障壁形成の現象論は、周辺部とコア部に共通する可能性のある物理に焦点を当てて概説される。この目的のために、乱流誘起フラックスの速度シア低減という枠組みは、長らく周辺部に適用されてきたが、コア部の分岐ダイナミクスの測定と最近の因果性の検証に照らして考察される。また、磁気シア構造がコア部の輸送障壁形成を促進する可能性のある役割が検討される。炉心プラズマに関連する予測能力を構築するための実験的および理論的課題は、周辺部の効果から遠く離れた自発的な電場シアの生成に関する最近の観測と、L-H遷移における周辺部およびその近傍のプラズマ特性の評価によって浮き彫りにされる。

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