论文标题
通过MEV离子抑制湍流，以增强融合等离子体的性能
Towards enhanced performance in fusion plasmas via turbulence suppression by MeV ions
论文作者
论文摘要
Megaelectron伏特（MEV）α颗粒将是磁性约束融合反应器中血浆加热的主要来源。然而，大多数α颗粒的能量不是加热燃料离子，而是转移到电子的。此外，α颗粒还可以激发阿尔芬尼克不稳定性，以前被认为是有害的。与期望相反，我们在最近的欧洲圆环（JET）实验中证明了在MEV离子存在和强大的快速离子驱动的Alfgenic不稳定性的情况下，有效的离子加热。使用最先进的建模工具对这些实验进行的详细运输分析解释了观察结果。在这里，我们通过MEV离子在等离子体中显示了一种新型的湍流抑制和改善的能量绝缘，并通过复杂的多尺度机制产生大规模的区域流量，并完全开发了Alfgenic活性。这种机制有望在融合反应器和主要的α颗粒加热中进行更经济的操作，并最终更便宜的融合电力
Megaelectron volt (MeV) alpha particles will be the main source of plasma heating in magnetic confinement fusion reactors. Yet, instead of heating fuel ions, most of the energy of alpha particles is transferred to electrons. Furthermore, alpha particles can also excite Alfvenic instabilities, previously considered as detrimental. Contrary to expectations, we demonstrate efficient ion heating in the presence of MeV ions and strong fast-ion driven Alfvenic instabilities in recent experiments on the Joint European Torus (JET). Detailed transport analysis of these experiments with state-of-the-art modeling tools explains the observations. Here we show a novel type of turbulence suppression and improved energy insulation in plasmas with MeV ions and fully developed Alfvenic activities through a complex multi-scale mechanism that generates large-scale zonal flows. This mechanism holds promise for a more economical operation of fusion reactors with dominant alpha particle heating and, ultimately, cheaper fusion electricity
