EAST高功率低杂波与边界等离子体非线性相互作用的机理研究

Our research will explore the best coupling lower hybrid wave (LHW) with plasma and optimize the current drive efficiency by the numerical simulation of non-linear interactions between the LHW and edge plasma. By Conbining with complicated edge density model, improving LHW coupling code used in EAST and considering the effects of LHW power and neutral gas ionization, etc., the edge electrons density and its perturbations including others will be calculated and analyzed. Subsequently, for the EAST parameters, the coupling characters of LHW will be further analyzed to explore its optimization. It is very important and necessary to achieve the operation of steady-state plasma in EAST under high LHW power conditions.

本课题通过数值模拟研究高功率低杂波与边界等离子体非线性相互作用，探索高功率低杂波与等离子体最佳耦合条件及电流驱动模式。通过结合复杂密度理论模型，改进EAST低杂波耦合程序，并考虑低杂波功率和中性气体电离等影响，对边界电子密度修正及扰动等问题进行数值模拟研究。针对EAST实验参数，计算分析不同条件下波与等离子体耦合特性，探索最佳耦合方式。开展这项研究对EAST高功率长脉冲稳态等离子体的运行具有重要意义。