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Complete suppression of the m = 2/n = 1 neoclassical tearing mode using electron cyclotron current drive in DIII-D

C.C. Petty, R.J. La Haye, T.C. Luce, D.A. Humphreys, A.W. Hyatt, J. Lohr, R. Prater, E.J. Strait, M.R. Wade2004年被引用 143Nuclear FusionIF 3出版社

The first suppression of the important and deleterious m = 2/n = 1 neoclassical tearing mode (NTM) is reported using electron cyclotron current drive (ECCD) to replace the 'missing' bootstrap current in the island O-point. Experiments on the DIII-D tokamak verify that the maximum shrinkage of the m = 2/n = 1 island occurs when the ECCD location coincides with the q = 2 surface. The DIII-D plasma control system is put into a 'search and suppress' mode to make small changes in the toroidal field to find and lock onto the optimum position, based on real time measurements of dBθ/dt, for complete m = 2/n = 1 NTM suppression by ECCD. The requirements of the ECCD for complete island suppression are well modelled by the modified Rutherford equation for the DIII-D plasma conditions.

日本語訳

m = 2/n = 1の重要かつ有害な新古典ティアリングモード(NTM)の初めての抑制が、電子サイクロトロン電流駆動(ECCD)を用いて、島のO点における「欠落した」ブートストラップ電流を置き換えることにより報告される。DIII-Dトカマクでの実験により、ECCDの位置がq = 2面と一致するときに、m = 2/n = 1の島の最大の縮小が生じることが検証される。DIII-Dプラズマ制御システムは「探索および抑制」モードに設定され、dBθ/dtのリアルタイム測定に基づいてトロイダル磁場を微小に変化させ、ECCDによるm = 2/n = 1のNTMの完全抑制のための最適位置を特定し、そこに固定する。完全な島の抑制のためのECCDの要件は、DIII-Dプラズマ条件に対する修正ラザフォード方程式によって良好にモデル化される。

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diii-d高精度(タイトル一致)

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DIII-DCurrent driveTearing modeNeoclassical tearing modeElectron cyclotron current drive
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