H2/He等离子体与液态锂相互作用的物理过程研究

Due to high heat removal capability, resilience against radiation damage and the ability to pump hydrogenic species, the use of liquid lithium as a plasma-facing component (PFC) in a fusion reactor offers many potential benefits over conventional solid PFC's. However, many questions concerning plasma interacting with liquid lithium should be solved before its application to fusion reactors. In this study, plasma-lithium interaction will be investigated in our group. Plasmas are generated by one high density plasma linear device. Free liquid surfaces are produced by one liquid lithium loop which couples into the linear device. The formation of the cloud of lithium vapor and plasma interacting with lithium-vapor will be studied. Dynamics of the cloud of lithium vapor will be described. The behaviors of vapor shielding, sputtering and retention will be examined. The effect of the cloud of lithium vapor on sputtering will be considered. The mechanism of plasma-lithium interaction will be presented.

液态锂被认为是很有希望作为未来高功率聚变堆的面向等离子体材料。等离子体与液态锂表面相互作用过程中，锂蒸发、锂蒸气云的形成、锂蒸气云层与等离子体相互作用过程的研究一直未引起注意。本项目将针对这些问题，利用课题组拥有的高密度等离子体直线装置和液态锂回路，开展等离子体与液态锂相互作用的物理过程研究。揭示锂蒸气云层对热负荷和粒子的屏蔽效应及其机制；揭示锂蒸气云层和流动液态锂对等离子体辐照下锂溅射的影响；发展温度增强的溅射物理模型；发展流动液态锂作为粒子泵收集氢、氦粒子的物理模型。本项目的开展，为全面揭示等离子体与液态锂相互作用的物理机制；为面向等离子体聚变材料的选择提供新的研究途径；为设计液态偏滤器提供重要的实验数据，具有很强的先导性和前瞻性。

液态锂被认为是很有希望作为未来高功率聚变堆的面向等离子体材料。针对等离子体与液态锂表面相互作用引发的锂蒸发、锂蒸气云形成、锂蒸气云层与等离子体相互作用现象，我们利用自主研制的基于液态锂回路的高密度等离子体直线装置，系统开展了等离子体与液态锂相互作用的物理过程研究。通过实验揭示了锂蒸气云层对热负荷和粒子的屏蔽效应及其机制；解释了锂蒸气云层和流动液态锂对等离子体辐照下锂溅射的影响；探索了流动液态锂作为粒子泵收集氢、氦粒子的物理模型。这些结果为全面揭示等离子体与液态锂相互作用的物理机制；为面向等离子体聚变材料的选择提供新的研究途径；为设计液态偏滤器提供重要的实验数据，具有很强的先导性和前瞻性。