论文标题
通过正常事件产生的磁岛中的RF电流凝结避免破坏
Disruption Avoidance via RF Current Condensation in Magnetic Islands Produced by Off-Normal Events
论文作者
论文摘要
随着Tokamaks的设计和建造，血浆中的存储能量水平越来越高，因此中断变得越来越危险。据报道，在欧洲联合圆环（Jet）Tokamak中，有95％的破坏与iTer一样的壁之前是大型锁定岛的生长，这些大岛大多数是由新古典主义撕裂模式以外的其他正常事件产生的。本文讨论了RF电流驱动器稳定大岛的使用，重点是当使用相对较高的力量稳定大岛时出现的非线性效应。 RF电流的冷凝效应可以集中在岛中心附近的RF驱动电流，从而提高了稳定的效率。如果射线轨迹的瞄准无法正确考虑非线性效应，则非线性阴影效果可能会阻碍岛屿的稳定。
As tokamaks are designed and built with increasing levels of stored energy in the plasma, disruptions become increasingly dangerous. It has been reported that 95% of the disruptions in the Joint European Torus (JET) tokamak with the ITER-like wall are preceded by the growth of large locked islands, and these large islands are mostly produced by off-normal events other than neoclassical tearing modes. This paper discusses the use of RF current drive to stabilize large islands, focusing on nonlinear effects that appear when relatively high powers are used to stabilize large islands. An RF current condensation effect can concentrate the RF driven current near the center of the island, increasing the efficiency of the stabilization. A nonlinear shadowing effect can hinder the stabilization of islands if the aiming of the ray trajectories does not properly consider the nonlinear effects.
