报告摘要：

There are two ways to affect the stability of tearing modes. One is to change the stability criterion of tearing modes from the outer region of island. The other is to affect the perturbation of parallel current in the island. Based on this idea, influence of energetic ions on the evolution of magnetic island has been studied systematically for the island width is much smaller than the orbit width of energetic ions. In addition, an uncompensated cross field current is yielded inside the island based on quasi-neutrality, which produces a return parallel current, and may compensate the loss bootstrap current in the island. This effect may become significant, and cancels partially or overcomes the destabilizing effect of the bootstrap current. Based on the analysis, a possibility to suppress neoclassical tearing modes by co-CEI for the operation scenario with weak magnetic shear for ITER is provided.

报告人简介：

蔡辉山，中国科学技术大学教授。中科院青年促进会优秀会员，2017年起任IAEA-EP国际顾问委员会IPAC成员，2014年起任ITPA-EP成员，并任一个研究方向协调人。研究方向为磁约束聚变和等离子体物理。近年来在Phys. Rev. Lett.等SCI刊物上发表论文二十多篇，主持过科技部国家磁约束专项项目、国家自然科学基金优秀青年基金项目等十多项科研项目。

“论坛”主请人联系方式：

高喆   gaozhe@tsinghua.edu.cn