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Kinetic modelling of the interaction of rotating magnetic fields with a radially inhomogeneous plasma

Martin F. Heyn, Ivan B. Ivanov, Sergei V. Kasilov, Winfried Kernbichler2006年被引用 32Nuclear FusionIF 3出版社

The interaction of rotating magnetic fields (RMFs) with a plasma is modelled in the linear approximation. A kinetic Hamiltonian model for the rf plasma conductivity is used. A radially inhomogeneous periodic cylindrical plasma with a rotational transform of the magnetic field is studied with parameters relevant to the dynamic ergodic divertor (DED) of TEXTOR. For the case of a finite electron diamagnetic velocity it is shown that the torque resulting from the RMF tends to bring the electron fluid approximately to the rest frame of this field. This result is in qualitative agreement with long mean-free path drift MHD theory. In contrast to that theory where a resonant behaviour is found at electron and ion diamagnetic frequencies, in the present kinetic analysis, the RMF frequency where the torque passes through zero is smaller than the electron diamagnetic frequency if there is an electron temperature gradient present. The relation of these results with recent experimental measurements of the DED-induced plasma rotation in TEXTOR is discussed.

日本語訳

回転磁場(RMF)とプラズマとの相互作用を線形近似でモデル化する。rfプラズマ伝導度に対する運動論的ハミルトニアンモデルを用いる。磁場の回転変換を有する半径方向に不均一な周期的円筒プラズマを、TEXTORの動的エルゴディックダイバータ(DED)に関連するパラメータで研究する。有限の電子反磁性速度の場合について、RMFに起因するトルクが電子流体をこの場の静止系に近似的に引き寄せる傾向があることを示す。この結果は、長い平均自由行程のドリフトMHD理論と定性的に一致する。電子およびイオンの反磁性周波数で共鳴挙動が見出されるその理論とは対照的に、本運動論的解析では、電子温度勾配が存在する場合、トルクがゼロを通過するRMF周波数は電子反磁性周波数よりも小さい。これらの結果と、TEXTORにおけるDED誘起プラズマ回転の最近の実験的測定との関連について考察する。

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textor中精度(概要文一致)
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