RESEARCH ON PLASMA EQUILIBRIUM CONTROL SYSTEM OF HIGH PRECISION AND FAST RESPONSE FOR THE TOKAMAK
托卡马克等离子体的高精度快响应平衡控制系统的研究

In order to achieve plasma equilibrium control of horizontal position under high-power wave heating, an equilibrium control system for the HT-6M Tokamak with a thin-wall vacuum vessel has been studied and realized. The system is composed of the current carrying plasma, thin-wall vacuum vessel and feedback control field magnet. A 1MW GTO DC chopper is adopted for the power supply of feedback control magnetic field while the Bang-Bang control mode is used in this system. It makes the system have the ability of fast response and high precision. Under various conditions, the horizontal deviation of the controlled plasma is less than !3ram with a corresponding controllable precision better than 1.5%.