托卡马克脱靶高约束模式运行机制研究

脱靶问题是国际热核聚变实验堆（ITER）计划的核心问题之一。本项目基于HL-2A托卡马克装置，尝试采用多种方式实现高约束模式偏滤器脱靶，随后进行参数扫描并尝试利用多种诊断数据进行反馈控制，最终实现脱靶H模的稳定运行与控制。同时本项目将开展HL-2A脱靶期间宏观参数演化规律和对脱靶影响的研究以及脱靶对湍流输运影响的研究：一方面考察不同脱靶获得方式和不同脱靶状态对高约束模式运行的影响，研究不同参数下H模约束情况、边缘输运垒梯度变化，理解H模脱靶的物理机制；一方面研究脱靶对湍流输运、流剪切、雷诺胁强等微观参量的影响，以及获得脱靶过程中，尤其是H模脱靶过程中湍流输运的微观物理图像。该项目的开展将推动我国在脱靶高约束模式领域的研究，为ITER的建设提供有力的数据支持。

Divertor plasma detachment is one of core issues of International Thermonuclear Experimental Reactor (ITER). Base on HL-2A tokamak, this project will try to use several methods to obtain detachment in H-mode discharge, scan the parameters and achieve feedback control, and finally get stable operation. Meanwhile, this project will also do research about the effect of plasma parameter on detachment and the turbulence transport evolution during this process. On the one hand, we will study the effect of detachment, which is achieved by different methods or has different status (partially, pronounced, or fully detachment), on H-mode, and try to understanding the detachment physics. On the other hand, we will study the turbulence physics during detachment, such as the change of turbulence transport, shear flow, Reynold stress, and et al. This project will be benefited for the reaserch on the operational mechanism research of divertor detachment in high confinement discharge, and give the important data support for ITER.