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Performance, heating and current drive scenarios of ASDEX Upgrade advanced tokamak discharges

R.C. Wolf, J. Hobirk, G.D. Conway, O. Gruber, A. Gude, S. Günter, K. Kirov, B. Kurzan, F. Leuterer, M. Maraschek2001年被引用 42Nuclear FusionIF 3出版社

Various approaches to high performance and steady state operation are presented. Strong neutral beam heating in the current ramp leads to internal transport barriers (ITBs) in conjunction with negative central magnetic shear. To avoid the destabilizationof external kink modes this regime is limited to L mode edge operation with βN < 1.7. In high poloidal β, βp, discharges, full non-inductive current drive has been achieved transiently. At Greenwald density, values of βp = 3.1, βN = 2.8 and HITER89-P = 1.8 have been reached simultaneously. In plasmas with ITBs and L mode edge, additional ECRH and ECCD facilitates high core confinement with Te ≈ Ti. CentralECCD has been applied in low density low current discharges. For ECCD in the co-current direction a current drive fraction of 82% is calculated. In the case of counter-ECCD, negative central shear withqmin > 1 leads to the formation of an electron ITB.

日本語訳

高性能かつ定常状態の運転に向けた様々なアプローチが提示される。電流ランプ中の強力な中性粒子ビーム加熱は、負の中心磁気シアと組み合わさって内部輸送障壁(ITB)を形成する。外部キンクモードの不安定化を避けるため、この領域はβN < 1.7のLモード端部運転に限定される。高ポロイダルβ(βp)放電において、完全非誘導電流駆動が過渡的に達成されている。グリーンワルド密度において、βp = 3.1、βN = 2.8、HITER89-P = 1.8の値が同時に到達された。ITBとLモード端部を有するプラズマでは、追加のECRHおよびECCDにより、Te ≈ Tiを伴う高い中心閉じ込めが促進される。中心ECCDは低密度・低電流放電において適用されている。同方向電流ECCDの場合、電流駆動割合82%が計算される。逆方向ECCDの場合、qmin > 1を伴う負の中心シアが電子ITBの形成をもたらす。

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asdex-upgrade高精度(タイトル一致)

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ASDEXASDEX UpgradeCurrent driveAdvanced tokamak
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