Abstract:

Control problem of vertical instability of HL-2M tokamak was studied with DⅢ-D TokSys. The vertical displacement event (VDE) was controlled by the vessel and active conductors, the study of the eigenmodes and current distribution of the vessel greatly reduced the difficulty of modeling, and a mathematical model was set up and parameters of active conductors and the power supply were verified. The growth rates and maximum controllable vertical displacement for different plasma shape configurations with different elongation were calculated. Simulations for snow flake, single null and double null divertors were made in simulink environment by TokSys with a PD controller. Results show that VDE can be controlled very well for different plasma shape configurations.

Key words: TokSys, HL-2M tokamak, Vertical instability, Growth rate, Simulink

摘要：

用DⅢ-D的TokSys研究了HL-2M等离子体垂直不稳定性控制问题。使用真空室和主动线圈控制等离子体垂直不稳定性，分析了真空室的本征模和电流分布，极大简化真空室建模难度，建立了垂直不稳定性数学模型，验证了主动线圈和电源模型参数，计算了不同拉长比位形的等离子体增长率和最大可控垂直位移。利用TokSys建立了雪花、单零、双零偏滤器位形垂直不稳定仿真模型，然后通过simulink对采用PD算法的垂直不稳定系统进行仿真。结果表明，构建的模型能够较好控制不同位形的垂直不稳定性。

关键词: TokSys, HL-2M装置, 垂直不稳定性, 增长率, Simulink