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Characteristics of energy transport of Li-conditioned and non-Li-conditioned plasmas in the National Spherical Torus Experiment (NSTX)

S Ding, S M Kaye, R E Bell, R Kaita, H Kugel, B P LeBlanc, S Paul, B Wan2010年Plasma Physics and Controlled FusionIF 2.2出版社

The transport properties of National Spherical Torus Experiment (NSTX) plasmas obtained during the 2008 experimental campaign have been studied and are reported here. Transport trends and dependences have been isolated, and it is found that both electron and ion energy transport coefficients have strong dependences on local values of n ∇T, which in turn is strongly dependent on local current density profile. Without identifying this dependence, it is difficult to identify others, such as the dependence of transport coefficients on Bp (or q), Ip and Pheat. In addition, a comparison between discharges with and without lithium wall conditioning has been made. While the trends in the two sets of data are similar, the thermal transport loss, especially in the electron channel, is found to strongly depend on the amount of lithium deposited, decreasing by up to 50% of its no-lithium value.

日本語訳

2008年の実験キャンペーン中に得られたNational Spherical Torus Experiment(NSTX)プラズマの輸送特性を研究し、ここに報告する。輸送の依存性が特定され、電子とイオンの両方のエネルギー輸送係数が、局所的なn∇Tの値に強い依存性を示すことが見出された。これはさらに、局所的な電流密度分布に強く依存する。この依存性を特定しなければ、Bp(またはq)、Ip、Pheatなどの他のパラメータに対する輸送係数の依存性を特定することは困難である。さらに、リチウム壁調整の有無による放電の比較が行われた。2つのデータセットの傾向は類似しているが、熱輸送損失、特に電子チャネルにおける熱輸送損失は、堆積したリチウム量に強く依存し、リチウムなしの値の最大50%まで減少することが見出された。

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