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Behaviour of carbon and boron impurities in the Madison Symmetric Torus

S T A Kumar, D J Den Hartog, R M Magee, G Fiksel, D Craig2011年Plasma Physics and Controlled FusionIF 2.2出版社

Temporally and spatially resolved measurements of carbon and boron impurity density are obtained in the reversed field pinch (RFP) for the first time. It is observed that, unlike in tokamaks and stellarators, the RFP does not exhibit a centrally peaked impurity profile in either standard plasmas where field lines have some degree of stochasticity, or improved confinement discharges where there exist well-nested flux surfaces for a substantial fraction of the plasma volume. Results from improved confinement discharges also indicate an outward convection of impurities from the core of the plasma.

日本語訳

時間分解および空間分解された炭素および不純物密度の測定が、逆転磁場ピンチ(RFP)において初めて取得された。トカマクやヘリカル装置とは異なり、RFPでは、磁力線がある程度の確率性を有する標準プラズマ、あるいはプラズマ体積の大部分において良好な磁気面が存在する改善閉じ込め放電のいずれにおいても、中心ピーク型の不純物密度分布を示さないことが観測された。改善閉じ込め放電の結果はまた、プラズマ中心部からの不純物の外向き輸送を示している。

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