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3D field induced collisionless zonal flow decay in tokamak plasmas

G.J. Choi, T.S. Hahm2018年被引用 14Nuclear FusionIF 3出版社

We perform a gyrokinetic study of 3D resonant magnetic perturbation (RMP) field effect on zonal flows in tokamak plasmas. The result indicates that energy-dependent secular radial drift of particles due to the tangential component () of the RMP field induces a further long term algebraic decay of the Rosenbluth–Hinton (1998 Phys. Rev. Lett. 80 724) residual flow expected in an axisymmetric tokamak. This mechanism could be related to an increase of H-mode transition power threshold in the presence of RMP observed in many tokamak experiments.

日本語訳

3次元共鳴磁気摂動(RMP)磁場がトカマクプラズマにおける帯状流に及ぼす影響に関するジャイロ運動論的研究を行う。その結果、RMP磁場の接線成分()による粒子のエネルギー依存性のある永年半径方向ドリフトが、軸対称トカマクで期待されるRosenbluth–Hinton(1998 Phys. Rev. Lett. 80 724)残留流のさらなる長期的代数減衰を誘起することが示される。この機構は、多くのトカマク実験で観測されているRMP存在下でのHモード遷移パワー閾値の増加に関連している可能性がある。

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Zonal flow
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