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The stochastic field transport associated with the slab ITG modes

J W Connor, R J Hastie, A Zocco2013年Plasma Physics and Controlled FusionIF 2.2出版社

Many models for anomalous transport consider the turbulent E × B transport arising from electrostatic micro-instabilities. In this paper we investigate whether the perturbed magnetic field that is associated with such instabilities at small but finite values of β can lead to significant stochastic magnetic field transport. Using the tearing parity, long wavelength ion temperature gradient (ITG) modes in a plasma slab with magnetic shear as an example, we calculate the amplitude of the perturbed magnetic field at the resonant surface that results. The plasma model consists of a Braginskii description for the electrons with the dissipation at the resonant surface evaluated for the semi-collisional regime, while a finite ion Larmor radius kinetic model is invoked for the ions. The resulting stochastic field transport is estimated and also compared with an estimate for the E × B transport due to the ITG mode.

日本語訳

多くの異常輸送モデルは、静電的な微不安定性に起因する乱流E×B輸送を考慮する。本論文では、そのような不安定性に伴う摂動磁場が、小さくとも有限なβ値において、有意な磁場輸送をもたらすかどうかを調べる。例として、磁気シアを有するプラズマ中の長波長イオン温度勾配(ITG)モードのティアリングパリティを考え、共鳴面における摂動磁場の振幅を計算する。プラズマモデルとしては、電子に対してはBraginskii記述を用い、共鳴面での散逸を半衝突領域で評価する一方、イオンに対しては有限ラーモア半径効果を取り入れた運動論的モデルを用いる。得られた結果としての確率的磁場輸送を評価し、ITGモードによるE×B輸送の推定値と比較する。

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Ion temperature gradient
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