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Perturbation field penetration into the TEXTOR tokamak and the resulting torque

K.H. Finken1999年被引用 24Nuclear FusionIF 3出版社

Three model calculations for the reconnection of AC (frequency range: 1-10 kHz) magnetic field lines of the perturbation field of the TEXTOR dynamic ergodic divertor (DED) have been performed. The first model assumes that the shielding current fills the whole ergodic area (typically 2.5 cm wide), and the second one assumes that each resonant Fourier component of the magnetic field is shielded by currents flowing in its island (typically 0.5 cm wide). The last model also takes plasma flows into account, leading to a resonant interaction; the shielding width amounts to only 0.2 mm. Depending on the specific model assumptions, strong or mild shielding of the magnetic field lines is obtained. The dissipation process is also connected with a transfer of torque from the DED field to the plasma. The values depend on the frequency applied and on the model assumed; for all models, the obtainable forces are of the same order as those from NBI, allowing interesting sheared flow patterns to be imposed.

日本語訳

TEXTOR動的エルゴディックダイバータ(DED)の摂動場における交流(周波数範囲:1〜10 kHz)磁力線の再結合について、3つのモデル計算が行われた。第1のモデルは、遮蔽電流がエルゴディック領域全体(典型的には幅2.5 cm)を満たすと仮定する。第2のモデルは、磁場の各共鳴フーリエ成分が、その島(典型的には幅0.5 cm)内を流れる電流によって遮蔽されると仮定する。第3のモデルは、プラズマ流も考慮に入れ、共鳴相互作用をもたらす。この場合、遮蔽幅はわずか0.2 mmとなる。モデルの仮定に応じて、磁力線の強い遮蔽または弱い遮蔽が得られる。また、散逸過程は、DED場からプラズマへのトルク伝達と関連している。その値は、適用される周波数と仮定されるモデルに依存する。すべてのモデルにおいて、得られる力はNBIによるものと同程度であり、興味深いせん断流パターンを形成することを可能にする。

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