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RMP enhanced transport and rotational screening in simulations of DIII-D plasmas

V.A. Izzo, I. Joseph2008年被引用 51Nuclear FusionIF 3出版社

Nonlinear magnetohydrodynamic simulations of an equilibrium in the DIII-D geometry with applied resonant magnetic perturbations (RMPs) are performed. The reduction in pedestal density observed in RMP experiments is explained in terms of E × B convection cells crossing the separatrix. Results are obtained both in the absence of plasma rotation and for two rotation profiles having different values at the separatrix. The effects of rotation on RMP screening as well as on the density transport mechanism are obtained from the simulations. Poloidal mode spectra from the simulations show amplification of the resonant components of the error field for the non-rotating plasma. With rotation, this amplification is reduced and a toroidal phase shift appears. At the highest value of rotation, an oscillation in the toroidal mode number n = 3 is observed. These results are considered in light of analytic error field theory.

日本語訳

DIII-D形状における共鳴磁気摂動(RMP)を印加した非線形磁気流体力学シミュレーションを実施した。RMP実験で観測されたペデスタル密度の低下は、セパラトリックスを横切るE×B対流セルによって説明される。結果は、プラズマ回転がない場合と、セパラトリックスにおいて異なる値を有する2つの回転プロファイルの場合の両方について得られた。RMP遮蔽に対する回転の影響および密度輸送機構に対する回転の影響は、シミュレーションから得られた。シミュレーションからのポロイダルモードスペクトルは、非回転プラズマにおける誤差磁場の共鳴成分の増幅を示す。回転がある場合、この増幅は低減され、トロイダル位相シフトが現れる。最高の回転値では、トロイダルモード数n=3の振動が観測される。これらの結果は、解析的誤差磁場理論に照らして考察される。

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diii-d高精度(タイトル一致)

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DIII-DResonant magnetic perturbation
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