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Flow generation, bifurcation, and transport barrier in CCT

R J Taylor, P Pribyl, G R Tynan, B C Wells1994年Plasma Physics and Controlled FusionIF 2.2出版社

The H-mode in CCT can be obtained in a wide range of densities due to advanced titanium hydride based recycling control. In this paper we study the radial particle barrier associated by the rotational E layer. The m=1 and the n=0 toroidal mode is used for the analysis. Mach probe (a two sided Langmuir probe) and poloidal rake probe data along with reflectometer data have been used to define the flow properties of the layer. The experimental results (including recent lower hybrid heating experiments) indicate that a nearly absolute particle barrier is achieved. The low frequency fluctuations found in ohmic discharges are eliminated in H-mode discharges due to "rotational averaging" in the interior and "scraping/shaving" of the fluid boundary at the separatrix.

日本語訳

CCTにおけるHモードは、高度な水素化チタンリサイクリング制御により、広範囲の密度で達成可能である。本論文では、回転E層に関連する動径粒子障壁について研究する。解析にはm=1、n=0トロイダルモードを用いる。マッハプローブ(両面ラングミュアプローブ)およびポロイダルレーキプローブのデータと、反射計のデータを併用して、この層の流動特性を定義した。実験結果(最近の低混成波加熱実験を含む)は、ほぼ完全な粒子障壁が達成されることを示している。オーミック放電で観測される低周波揺動は、Hモード放電では、内部での「回転平均化」とセパラトリックスにおける流体境界の「スクレイピング/シェービング」により、排除される。

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