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Toroidal magnetic field ripple and ion orbit loss effects on edge toroidal rotation in J-TEXT Tokamak plasmas

Zhong Zeng, Jian Luo, G. Zhuang, K. Gentle, Q.M. Hu, Z.F. Cheng, Bo Rao, Zhengqing Zhang, Peng Shi, Jie Chen2018年被引用 2Nuclear FusionIF 3出版社

The edge toroidal rotation on J-TEXT is in the counter-current direction and sensitive to electron density and safety factor. During a density ramp-up phase, the initial toroidal rotation in the edge region (e.g. r/a  =  0.7–1), having one speed with little radial dependence, evolves to develop a radial profile when the edge density is sufficiently large. The effects of ripple-induced thermal loss on plasma rotation are predicted by neoclassical theory for those discharges, and comparisons with the measurements are performed. The predictions agree well with the measurements over a range of plasma conditions, confirming that using the ripple effect to interpret the phenomenon is appropriate in certain parameter regimes, while in others the neoclassical effects are not sufficient to predict the experimental observations.

日本語訳

J-TEXTにおけるエッジのトロイダル回転は、逆電流方向であり、電子密度と安全因子に敏感である。密度ランプアップ段階中、エッジ領域(例えばr/a = 0.7–1)における初期のトロイダル回転は、半径方向への依存性がほとんどない単一の速度を持つが、エッジ密度が十分に大きくなると、半径方向のプロファイルを発達させる。リップル誘起熱損失がプラズマ回転に及ぼす影響は、これらの放電に対して新古典理論によって予測され、測定結果との比較が行われた。予測は、さまざまなプラズマ条件にわたって測定結果とよく一致し、リップル効果を用いてこの現象を解釈することが特定のパラメータ領域では適切であることを確認したが、他の領域では新古典効果は実験観測を予測するには十分ではない。

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TEXTJ-TEXTToroidal rotationField ripple
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