电子鱼骨：理论与实验证据
Electron fishbones: Theory and experimental evidence
摘要：
我们讨论的过程中激发的鱼骨状内部扭结不稳定性驱动的超热电子实验产生的不同手段：电子回旋共振加热（ECRH）和低杂波（LH）功率注入。分析了用ECRH或LH激发这些电子鱼骨的特点和意义。不仅模式的稳定性进行了解释，但稳态非线性振荡到突发（几乎定期）脉动之间的过渡，在FTU中观察到的，解释在LH功率输入。这些结果与燃烧等离子体中捕获的α粒子与低频MHD模式的相互作用的研究直接相关：事实上，反应堆相关条件下的α粒子的特征在于小的无量纲轨道，类似于电子;捕获粒子的反弹平均动力学，同时，取决于能量而不是质量。
英文摘要：
We discuss the processes underlying the excitation of fishbone-like internal kink instabilities driven by supra-thermal electrons generated experimentally by different means: Electron Cyclotron Resonance Heating (ECRH) and by Lower Hybrid (LH) power injection. The peculiarity and interest of exciting these electron fishbones by ECRH only or by LH only is also analyzed. Not only the mode stability is explained, but also the transition between steady state nonlinear oscillations to bursting (almost regular) pulsations, as observed in FTU, is interpreted in terms of the LH power input. These results are directly relevant to the investigation of trapped alpha particle interactions with low-frequency MHD modes in burning plasmas: in fact, alpha particles in reactor relevant conditions are characterized by small dimensionless orbits, similarly to electrons; the trapped particle bounce averaged dynamics, meanwhile, depends on energy and not mass.
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