论文标题
在湍流存在下对Alfvén不稳定性的陀螺仪研究
Gyrokinetic investigation of Alfvén instabilities in the presence of turbulence
论文作者
论文摘要
在存在离子 - 温度梯度（ITG）湍流的情况下，通过能量颗粒（EP）驱动的β诱导的AlfVén本征元素（BAE）的非线性动力学通过自我持续的全局陀螺仪模拟和分析理论进行了研究。考虑了具有较大纵横比和反向剪切的tokamak磁平衡。先前对这种构型的研究表明，电子物种在没有湍流的情况下确定BAE的非线性饱和水平起着重要作用[A. A. Biancalani等人，J。血浆物理学。 （2020）]。在这里，我们将研究扩展到湍流等离子体。发现EPS通过在大空间尺度上引入能量，主要是在主要的BAE的环形模式数及其谐波的情况下引入热通量。在此制度中，发现BAE携带强烈的电子热通量。还讨论了由BAE诱导的温度曲线以及在湍流动力学上的全局放松的馈送。
The nonlinear dynamics of beta-induced Alfvén Eigenmodes (BAE) driven by energetic particles (EP) in the presence of ion-temperature-gradient (ITG) turbulence is investigated, by means of selfconsistent global gyrokinetic simulations and analytical theory. A tokamak magnetic equilibrium with large aspect ratio and reversed shear is considered. A previous study of this configuration has shown that the electron species plays an important role in determining the nonlinear saturation level of a BAE in the absence of turbulence [A. Biancalani, et al., J. Plasma Phys. (2020)]. Here, we extend the study to a turbulent plasma. The EPs are found modify the heat fluxes by introducing energy at the large spatial scales, mainly at the toroidal mode number of the dominant BAE and its harmonics. In this regime, BAEs are found to carry a strong electron heat flux. The feed-back of the global relaxation of the temperature profiles induced by the BAE, and on the turbulence dynamics, is also discussed.
