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Observation of ELM suppression in hybrid discharges using n = 3 magnetic perturbations on DIII-D

C.C. Petty, T.E. Evans, J.C. DeBoo, B. Hudson, R.J. La Haye, T.C. Luce, P.A. Politzer, S.L. Allen, E.J. Doyle, M.E. Fenstermacher2010年被引用 11Nuclear FusionIF 3出版社

Large type-I edge localized modes (ELMs) are completely suppressed in hybrid discharges for the first time by applying an edge resonant perturbation (RMP) using an internal coil set with toroidal mode number n = 3. This is an important advance in developing hybrid discharges as a baseline operating scenario for ITER. In these experiments on the DIII-D tokamak, the ELM suppression lasts for ∼1 s in plasmas with normalized beta up to βN = 2.5 (volume average beta up to β = 3.4%) and a fusion performance factor as high as , which equals the value for the Q = 10 scenario in ITER. A strong interaction between the 3/2 neoclassical tearing mode and the RMP, which slows the pedestal toroidal rotation, limits the achievable βN and the duration of ELM suppression.

日本語訳

大型第一类边缘局域模(ELM)は、トロイダルモード数n = 3の内部コイルセットを用いた共鳴磁場摂動(RMP)の適用により、ハイブリッド放電において初めて完全に抑制された。これは、ITERのベースライン運転シナリオとしてのハイブリッド放電を開発する上での重要な進展である。DIII-Dトカマクにおけるこれらの実験では、ELM抑制は、規格化ベータ値がβN = 2.5(体積平均ベータ値がβ = 3.4%)までのプラズマにおいて約1秒間持続し、核融合性能係数はITERのQ = 10シナリオに相当する値に達した。ペデスタルのトロイダル回転を減速させる3/2新古典テアリングモードとRMPとの強い相互作用が、達成可能なβN値とELM抑制の持続時間を制限している。

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diii-d高精度(タイトル一致)iter中精度(概要文一致)

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DIII-DEdge localized modeMagnetic perturbation
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