托卡马克低杂波电流驱动的反馈控制研究

低杂波电流驱动的反馈控制系统已经建成，并在ＨＴ－６Ｂ托卡马克的纯低杂波电流驱动实验中得到应用。通过实时调节微波注入功率，由微波驱动并维持的等离子体电流变比率被成功地控制住。实验中，在等离子体密度、纵场及水平位移均存在波动的情况下，得到了２０ｈＡ的电流平台，其维持时间为加波的２０ｍｓ脉宽。

RESEARCH ON THE FEEDBACK CONTROL OF LOWER HYBRID CURRENT DRIVE PLASMA IN TOKAMAKS

A current derivative feedback control system has been established and used in pure lower hybrid current drive (LHCD) experiments on the HT-6B tokamak. By real-time regulating the injected microwave power, the derivative of plasma current driven and sustained by the microwave was controlled successfully. As a result, a flat-top of 20hA for 20ms was obtained in spile of variations of plasma density, toroidal field and horizontal displacement. A controlled ramp-down process with fixed derivatives has also been realized.