发表机构
Princeton University; Shanghai Jiao Tong University; Princeton Plasma Physics Laboratory（普林斯顿大学; 上海交通大学; 普林斯顿等离子体物理实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文利用振荡中心理论推导出任意涨落场驱动带状流的统一公式，简洁且普适，并连接了阿尔芬本征模与射频波驱动的极向流物理。
AI 中文摘要
对托卡马克中由漂移波湍流和由高能粒子驱动的阿尔芬本征模等涨落场激发带状流的分析研究，通常通过复杂的回旋动力学计算和模拟进行，其结果以难以解释而著称。在此，我们报告了一个清晰明了的结果，该结果也不局限于任何特定的模式或频率范围。利用同时包含有质动力和准线性扩散的振荡中心理论，我们推导出一个紧凑的公式，该公式以场的正则动量和耗散功率密度表示任何涨落场所产生的带状流驱动。对于由漂移波产生的带状流，我们的模型包含了先前临时推导的带状速度与漂移波能量密度之间的局部关系。我们结果的简洁性和普遍性也为通过外部波优化带状流激发开辟了道路，并架起了阿尔芬本征模-高能粒子相互作用物理与聚变等离子体中射频波驱动的极向流物理之间的桥梁。
英文摘要
Analytical studies of zonal-flow (ZF) excitation by fluctuating fields, such as drift-wave turbulence and Alfvén eigenmodes (AEs) driven by energetic particles (EPs) in tokamaks, are usually carried out via intricate gyrokinetic calculations and simulations whose results are notoriously difficult to interpret. Here, we report a transparent result that is also not limited to any particular modes or frequency range. Using oscillation-center theory that captures both ponderomotive forces and quasilinear diffusion, we derive a compact formula for the ZF drive produced by any fluctuating field in terms of the field's canonical momentum and the dissipation power density. For ZFs generated by drift waves, our model subsumes the local relation between the zonal velocity and the drift-wave energy density that was previously derived ad hoc. The simplicity and generality of our result also opens a path toward optimization of ZF excitation with external waves and bridges the physics of AE-EP interactions with that of poloidal flows driven by radiofrequency waves in fusion plasmas.
