论文标题
Tokamaks中的剪切 - alfvén和声学连续图的高级测量耦合
High-order geodesic coupling of shear-Alfvén and acoustic continua in tokamaks
论文作者
论文摘要
在某些条件下，在某些条件下显示了高阶血浆形状（主要是伸长和偏移，而不是低阶环形性），以在耦合的剪切 - alfvén和声学连续图中张开间隙，在频率上显着高于先前理论所预测的值。在这些间隙中的全球征原模，这些差距位于地球声学模式（GAM）和环形性诱导的Alfvéneigenmodes（TAES）之间，在Tokamak操作中典型的热 - 离子种群不稳定，而它们与循环颗粒的基本共鸣相近，这是在veLoci的基本范围内，并且在velocient上表现出了a gelocies的良好范围。因此，有望在操作Tokamaks的预测频率附近观察到此类本征模，在磁流失动力学光谱以及下一步融合实验的稳定性中扮演着尚未探索的角色。
High-order plasma shaping (mainly elongation and shift, as opposed to low-order toroidicity) is shown, under certain conditions, to open gaps in the coupled shear-Alfvén and acoustic continua at frequencies significantly above the values predicted by previous theories. Global eigenmodes in these gaps, which lie between those of geodesic acoustic modes (GAMs) and toroidicity-induced Alfvén eigenmodes (TAEs), are found unstable to hot-ion populations typical of tokamak operation, whilst their fundamental resonances with circulating particles are shown to take place at velocities near the geometric mean of the Alfvén and sound speeds. Therefore, such eigenmodes are expected to be observed near the predicted frequencies at operating tokamaks, playing a still unexplored role in magnetohydrodynamic spectroscopy as well as in the stability of next-step fusion experiments.
