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Braking due to non-resonant magnetic perturbations and comparison with neoclassical toroidal viscosity torque in EXTRAP T2R

L. Frassinetti, Y. Sun, R. Fridström, S. Menmuir, K.E.J. Olofsson, P.R. Brunsell, M.W.M. Khan, Y. Liang, J.R. Drake2015年被引用 18Nuclear FusionIF 3出版社

The non-resonant magnetic perturbation (MP) braking is studied in the EXTRAP T2R reversed-field pinch (RFP) and the experimental braking torque is compared with the torque expected by the neoclassical toroidal viscosity (NTV) theory. The EXTRAP T2R active coils can apply magnetic perturbations with a single harmonic, either resonant or non-resonant. The non-resonant MP produces velocity braking with an experimental torque that affects a large part of the core region. The experimental torque is clearly related to the plasma displacement, consistent with a quadratic dependence as expected by the NTV theory. The work show a good qualitative agreement between the experimental torque in a RFP machine and NTV torque concerning both the torque density radial profile and the dependence on the non-resonant MP harmonic.

日本語訳

非共鳴磁気摂動(MP)による制動をEXTRAP T2R逆転磁場ピンチ(RFP)において研究し、実験による制動トルクを新古典トロイダル粘性(NTV)理論から予測されるトルクと比較した。EXTRAP T2Rのアクティブコイルは、共鳴または非共鳴の単一高調波の磁気摂動を印加することができる。非共鳴MPは、コア領域の大部分に影響を及ぼす実験的な制動トルクを伴う速度制動を生じさせる。実験によるトルクはプラズマ変位と明確に関連しており、NTV理論が予測する二次依存性と一致している。本研究は、RFP装置における実験トルクとNTVトルクの間に、トルク密度の径方向分布および非共鳴MP高調波への依存性の両方に関して、良好な定性的一致を示すものである。

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Magnetic perturbationResonant magnetic perturbation
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