Abstract: The relationship between the residual loop voltage and the power of lower hybrid wave is investigated to obtain the lower hybrid wave current drive efficiency on EAST tokamak. The power of lower hybrid wave is normalized by plasma current，electron density，the major radius of the plasma and the effective ion charge number，so lower hybrid current drive efficiency can be calculated in one curve with different plasma parameters. The obtained lower hybrid current drive efficiency varies between 0.5 and 1.3×10¹⁹ A•m^-2•W^-1，a fully lower hybrid current drive is obtained as long as 3s at a plasma current of 277kA and lower hybrid wave power of 681kW.

Key words: EAST tokamak, Lower hybrid wave, Current drive efficiency

摘要： 在EAST上通过分析剩余环电压与低杂波功率之间的关系，计算得到了低杂波电流驱动效率。采用归一化功率，即功率对等离子体电流、电子密度、等离子体大半径以及有效电荷数归一化，将所有数据绘制在同一曲线中，这样可以得到不同等离子体参数下的低杂波电流驱动效率。实验得到低杂波电流驱动效率η₀=(0.5~1.3)×10¹⁹ A.m^-2.W^-1，在等离子体电流I_p=277kA、低杂波功率P_LH=681kW条件下，实验得到长达3s的低杂波全波驱动。

关键词: EAST装置, 低杂波, 电流驱动效率