Tearing mode stabilization by electron cyclotron waves (ECWs) has been carried out in Experimental advanced superconductiong tokamak (EAST) experiments. The effects of the amount of ECW power and the radial wave deposition location on stabilizing the m/n = 2/1 magnetic island are investigated, where m/n is the poloidal/toroidal mode number. The local heating is found to dominate the mode stabilization in these experiments. The stabilization is more effective when the wave is deposited closer to the radial island location, as expected. With increasing ECW power, however, the tearing modes are not stabilized completely, and the island width saturates at a finite width. Moreover, the island rotation frequency is found to decrease when the ECW deposition is close to the island such that the island width is reduced significantly. Using externally applied, rotating resonant magnetic perturbations to generate slowly rotating magnetic islands, the locked island stabilization by ECW has also been studied, and the island width reduction and nonuniform island rotation are observed when the island’s center passes through the ECW deposition region.

电子回旋波 (ECW) 的撕裂模式稳定已在实验性先进超导托卡马克 (EAST) 实验中进行。研究了ECW功率大小和径向波沉积位置对稳定m / n =2/1磁岛的影响，其中m / n是极向/环形模式数。在这些实验中发现局部加热支配模式稳定。正如预期的那样，当波沉积在更靠近径向岛位置时，稳定性会更有效。然而，随着 ECW 功率的增加，撕裂模式并没有完全稳定，岛宽在有限宽度处饱和。此外，当 ECW 沉积靠近岛时，发现岛旋转频率降低，从而使岛宽度显着减小。利用外部施加的旋转谐振磁扰来产生缓慢旋转的磁岛，还研究了 ECW 的锁定岛稳定性，当岛中心穿过 ECW 沉积区域时，观察到岛宽度减小和岛旋转不均匀。