论文标题
融合等离子体核心的新型高分子机制具有快速离子
New high-confinement regime with fast ions in the core of fusion plasmas
论文作者
论文摘要
本工作的关键结果是对融合等离子体中一种新型传输屏障的形成的理论预测和观察，称为F-ATB（快速离子引起的异常传输屏障）。正如通过最先进的全局静电和电磁模拟所证明的那样，F-ATB的特征是完全抑制了湍流传输的特征，这是由强剪切的，轴对称$ e \ times b $流动引起的 - 以及新古典的b $流 - 以及新易变的同步物，尽管将整体变化保持在显着降低的水平。触发机制被证明是通过离子 - 循环加热和等离子体微扰动产生的上热颗粒之间主要是静电谐振的相互作用。这些发现是通过对ASDEX升级放电$ \＃36637 $的现实模拟获得的 - 适当设计，以最大程度地发挥波粒子共振相互作用的有益作用 - 这表现出了通过能量颗粒产生的改进限制的预期性能。
The key result of the present work is the theoretical prediction and observation of the formation of a new type of transport barrier in fusion plasmas, called F-ATB (fast ion-induced anomalous transport barrier). As demonstrated through state-of-the-art global electrostatic and electromagnetic simulations, the F-ATB is characterized by a full suppression of the turbulent transport - caused by strongly sheared, axisymmetric $E \times B$ flows - and an increase of the neoclassical counterpart, albeit keeping the overall fluxes at significantly reduced levels. The trigger mechanism is shown to be a mainly electrostatic resonant interaction between supra-thermal particles, generated via ion-cyclotron-resonance heating, and plasma micro-turbulence. These findings are obtained by realistic simulations of the ASDEX Upgrade discharge $\#36637$ - properly designed to maximized the beneficial role of the wave-particle resonance interaction - which exhibits the expected properties of improved confinement produced by energetic particles.
