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Experimental divertor physics

C S Pitcher, P C Stangeby1997年Plasma Physics and Controlled FusionIF 2.2出版社

The physics of divertors in tokamaks is reviewed, primarily from an experimental point of view, although where possible simple analytic modelling is included. The paper covers the four main subject areas at issue in divertor research: (1) the wide dispersal of plasma power exhausted from the main plasma, (2) the production of sufficiently high gas pressures in the vicinity of pump ducts to enable the removal of fuel and helium (`ash') gas from the system, (3) the elimination or reduction of impurity production and (4) the screening of impurities produced, or intentionally added, at the plasma boundary from the plasma core. A simple analytic model, the `two-point' model, is introduced early in the paper and provides a framework for comparison of the experimental results, drawn from many machines, with simply derived expectations. Conclusions regarding the direction of future research priorities are made.

日本語訳

トカマクにおけるダイバータの物理を、主に実験的観点から概説するが、可能な範囲で単純な解析的モデリングも含める。本論文は、ダイバータ研究における4つの主要な主題を扱う:(1) 主プラズマから排出されるパワーの広域分散、(2) 燃料およびヘリウム(「灰」)ガスの系外排出を可能にするためのポンプダクト近傍での十分なガス圧力の生成、(3) 不純物生成の低減または除去、および(4) プラズマ境界で生成または意図的に添加された不純物のプラズマコアからの遮蔽。本論文の前半で「2点モデル」と呼ばれる単純な解析モデルを導入し、これを用いて、多くの実験装置から得られた実験結果と、単純な理論的予測との比較を行うための枠組みを提供する。最後に、今後の研究の優先順位に関する結論を述べる。

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