边缘电场在环形等离子体中的共振模式-粒子相互作用和传输障碍形成中的作用

IF 2.1 3区物理与天体物理 Q2 PHYSICS, FLUIDS & PLASMAS

Journal of Plasma Physics Pub Date : 2024-02-06 DOI:10.1017/s0022377824000047

Giorgos Anastassiou, Panagiotis Zestanakis, Yiannis Antonenas, Eleonora Viezzer, Yannis Kominis

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引用次数: 0

摘要

利用导向中心典范形式主义研究了边缘径向电场对轴对称环状磁平衡中粒子轨道和轨道谱的影响。计算了极化和反弹/转移平均环面前驱频率，突出了径向电场的作用。结果表明，径向电场能极大地改变具有特定动力学特征的粒子与特定扰动非轴对称模式之间的共振条件，并能形成输运障碍。共振和传输障碍的位置决定了粒子、能量和动量的传输，通过使用计算出的轨道频率，可以在相空间中精确定位。

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Role of the edge electric field in the resonant mode-particle interactions and the formation of transport barriers in toroidal plasmas

The impact of an edge radial electric field on the particle orbits and the orbital spectrum in an axisymmetric toroidal magnetic equilibrium is investigated using a guiding centre canonical formalism. Poloidal and bounce/transit-averaged toroidal precession frequencies are calculated, highlighting the role of the radial electric field. The radial electric field is shown to drastically modify the resonance conditions between particles with certain kinetic characteristics and specific perturbative non-axisymmetric modes, and to enable the formation of transport barriers. The locations of the resonances and the transport barriers that determine the particle, energy and momentum transport are shown to be accurately pinpointed in the phase space by employing the calculated orbital frequencies.

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来源期刊

Journal of Plasma Physics 物理-物理：流体与等离子体

CiteScore

3.50

自引率

16.00%

发文量

106

审稿时长

6-12 weeks

期刊介绍： JPP aspires to be the intellectual home of those who think of plasma physics as a fundamental discipline. The journal focuses on publishing research on laboratory plasmas (including magnetically confined and inertial fusion plasmas), space physics and plasma astrophysics that takes advantage of the rapid ongoing progress in instrumentation and computing to advance fundamental understanding of multiscale plasma physics. The Journal welcomes submissions of analytical, numerical, observational and experimental work: both original research and tutorial- or review-style papers, as well as proposals for its Lecture Notes series.