The steady fusion plasma operation is constrained by tungsten (W) material sputtering issue in the EAST tokamak. In this work, the suppression of W sputtering source has been studied by advanced wall conditionings. It is also concluded that the W sputtering yield becomes more with increasing carbon (C) content in the main deuterium (D) plasma. In EAST, the integrated use of discharge cleanings and lithium (Li) coating has positive effects on the suppression of W sputtering source. In the plasma recovery experiments, it is suggested that the W intensity is reduced by approximately 60% with the help of ∼35 h Ion Cyclotron Radio Frequency Discharge Cleaning (ICRF-DC) and ∼40 g Li coating after vacuum failure. The first wall covered by Li film could be relieved from the bombardment of energetic particles, and the impurity in the vessel would be removed through the particle induced desorption and isotope exchange during the discharge cleanings. In general, the sputtering yield of W would decrease from the source, on the bias of the improvement of wall condition and the mitigation of plasma-wall interaction process. It lays important base of the achievement of high-parameter and long-pulse plasma operation in EAST. The experiences also would be constructive for us to promote the understanding of relevant physics and basis towards the ITER-like condition.

稳定的聚变等离子体操作受到钨 (W ) 的限制EAST 托卡马克中的材料溅射问题。在这项工作中，通过先进的壁面调节研究了 W 溅射源的抑制。还得出结论，随着主氘 (D) 等离子体中碳 (C) 含量的增加，W 溅射产率变得更高。在 EAST 中，放电清洗和锂 (Li) 涂层的综合使用对抑制 W 溅射源具有积极作用。在等离子体恢复实验中，表明在真空失效后约 35 小时的离子回旋加速器射频放电清洁 (ICRF-DC) 和约 40 g 的锂涂层的帮助下，W 强度降低了约 60%。被锂膜覆盖的第一面墙可以从高能粒子的轰击中解脱出来，在放电清洗过程中，通过粒子诱导解吸和同位素交换去除容器中的杂质。一般来说，由于壁面条件的改善和等离子体-壁面相互作用过程的减轻，W的溅射产额会从源头上下降。为EAST实现高参数、长脉冲等离子体运行奠定了重要基础。这些经验也对我们促进对相关物理的理解和类似 ITER 条件的基础的理解具有建设性。为EAST实现高参数、长脉冲等离子体运行奠定了重要基础。这些经验也对我们促进对相关物理的理解和对类似 ITER 条件的基础的理解具有建设性。为EAST实现高参数、长脉冲等离子体运行奠定了重要基础。这些经验也对我们促进对相关物理的理解和对类似 ITER 条件的基础的理解具有建设性。