EAST全金属壁长脉冲运行下的破裂预测及主动避免实验研究

等离子体大破裂限制托卡马克装置获取高参数高性能等离子体，并严重威胁装置安全。近年来，随着高Z材料特别是钨材料在托卡马克装置第一材料中的广泛应用，高Z杂质聚芯破裂已经成为金属壁托卡马克运行中最突出的破裂类型。本项目针对EAST上的高Z杂质聚芯破裂，拟在理解破裂物理机制的基础上发展能够同时提供破裂概率与先兆特征预警的集成预测模型，并开展针对不同破裂先兆特征采取不同控制方法的分段主动避免措施的实验研究，从而有效减小EAST全金属壁长脉冲运行下高Z杂质聚芯破裂发生几率，并在ITER运行时间尺度下探索破裂预测及主动避免集成的方法与关键技术。

Major disruption limits the tokamak to obtain high performance plasma with high parameters, and its consequences poses a threaten to the device safety. In recent years, as the high Z material such as tungsten especially has been extensively used as the first wall of the tokamak, the disruption induced by the high Z impurity accumulation is observed to be the most dominant type in the operation of fully metal wall tokamak. As to this type of disruption observed on EAST, the project will develop an integrated prediction model based on the physical understanding of disruption mechanism. It can provide both the disruptive probability and the precursor alarm during a discharge, and therefore the relevant control method can be taken with respect to the different phase of disruption precursor. As a result, it is expected that the ratio of disruption induced by the high Z impurity accumulation on the long-pulse operation of fully metal wall tokamak is reduced effectively. Furthermore, a integrated method between the disruption avoidance and prediction and the relevant technique are attempted to be explored in the time scale of ITER-like operation.