Abstract Recent experiments of Experimental Advanced Superconducting Tokomak (EAST) have successfully demonstrated a long-pulse steady-state scenario with improved plasma performance through integrated operation. The helicon wave (fast wave at ω > 20 ω c i ) current drive in the EAST plasma with high β e operation is studied numerically by means of GENRAY/CQL3D treatment. A theoretical analysis of the wave damping factor shows that electron Landau damping dominates the wave absorption process and effective current drive occurs in the central plasmas for low β e operation. High beta (∼1.3) leads to even stronger Landau damping single-path wave absorption is found. The numerical calculation predicts a broad distribution of current drive with good efficiency in EAST plasma. Moreover, the current drive efficiency is proven to be sensitive to the plasma parameters, specially the initial parallel index of refraction n / / . A possible scenario of helicon wave current drive is proposed for the high β e EAST operation.

中文翻译：

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高β操作EAST中螺旋波电流驱动的理论分析

摘要 实验性先进超导托科马克 (EAST) 最近的实验已成功证明了长脉冲稳态方案，通过集成操作提高了等离子体性能。通过 GENRAY/CQL3D 处理数值研究了具有高 β e 操作的 EAST 等离子体中的螺旋波（ω > 20 ω ci 处的快波）电流驱动。波阻尼因子的理论分析表明，电子朗道阻尼在波吸收过程中占主导地位，并且有效的电流驱动发生在中心等离子体中，用于低 β e 操作。发现高β（~1.3）导致更强的朗道阻尼单路径波吸收。数值计算预测了 EAST 等离子体中具有良好效率的广泛电流驱动分布。而且，电流驱动效率被证明对等离子体参数敏感，特别是初始平行折射率 n / / 。为高 β e EAST 操作提出了一种可能的螺旋波电流驱动方案。