The nonlinear dynamics of beta-induced Alfvn eigenmodes (BAEs) driven by energetic particles (EPs) in the presence of ion-temperature-gradient 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 (Biancalani et al 2020 J. Plasma Phys.). 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.

通过自洽全局陀螺动力学模拟和分析理论，研究了在存在离子-温度-梯度湍流的情况下由高能粒子 (EP) 驱动的 β 诱导的 Alfvn 特征模式 (BAE) 的非线性动力学。考虑了具有大纵横比和反向剪切的托卡马克磁平衡。先前对这种配置的研究表明，在没有湍流的情况下，电子物种在确定 BAE 的非线性饱和水平方面起着重要作用（Biancalani等人2020 J. Plasma Phys.）。在这里，我们将研究扩展到湍流等离子体。发现 EP 通过在大空间尺度上引入能量来修改热通量，主要是在主要 BAE 及其谐波的环形模数上。在这种情况下，发现 BAE 具有很强的电子热通量。还讨论了 BAE 引起的温度分布的全局弛豫以及湍流动力学的反馈。