By exploiting the nonlinear amplification of the power deposition of RF waves, current condensation promises new pathways to the stabilization of magnetic islands. We present a numerical analysis of current condensation, coupling a geometrical optics treatment of wave propagation and damping to a thermal diffusion equation solver in the island. Taking into account the island geometry and relativistic damping, previous analytical theory can be made more precise and specific scenarios can be realistically predicted. With this more precise description, bifurcations and associated hysteresis effects could be obtained in an ITER-like scenario at realistic parameter values. Moreover, it is shown that dynamically varying the RF wave launching angles can lead to hysteresis and help to avoid the nonlinear shadowing effect.

中文翻译：

---

使用一致的射线追踪和孤岛加热计算 RF 电流冷凝

通过利用射频波功率沉积的非线性放大，电流凝结有望为磁岛的稳定提供新的途径。我们提出了电流凝结的数值分析，将波传播和阻尼的几何光学处理耦合到岛上的热扩散方程求解器。考虑到岛屿几何形状和相对论阻尼，可以使先前的分析理论更加精确，并且可以真实地预测特定场景。通过这种更精确的描述，可以在类似 ITER 的场景中以实际参数值获得分岔和相关的滞后效应。此外，研究表明，动态改变射频波发射角度会导致滞后并有助于避免非线性阴影效应。