正弦(余弦)线圈探测等离子体位移方法的改进

IMPROVING THE MEASUREMENT OF PLASMA DISPLACEMENT WITH sinθ(cosθ) COILS

用正弦(余弦)线圈与相应鞍形线圈感应信号的相加积分,来得到等离子体电流重心位移,是中小型托卡马克装置常用的方法,对了解与控制等离子体的平衡稳定,具有重要意义。但是在实际上由于中小装置放电时间较短,对等离子体电流及电流重心位移一般不加完善的控制,它们以及外加平衡控制场在放电期间都可以发生明显改变。

This paper deals with improving the measurement of plasma displacement.The signal resulted from eddy currents in the vaccum ve-ssel is eliminated by adding the direct signal From the saddle coil to the integrated displacement signal from the cosθ and saddle coils.A 'T' feedback network instead of a simple feedback resister or a gate circuit is used in the active integrator, which can provide both low error and good stability of the integration.