Effect of lithium vapour shielding on hydrogen plasma parameters
Effect of lithium vapour shielding on hydrogen plasma parameters
复制标题
锂蒸气屏蔽对氢等离子体参数的影响
DOI：
10.1088/1402-4896/ac2bde
复制
发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
Morgan T W
中科院分区：
文献类型：
--
作者：
Romano F;Rindt P;Scholten J;Hayashi Y;Morgan T W
液态锂蒸汽箱偏滤器对于未来聚变反应堆来说是一种有吸引力的排热解决方案。之前的工作已经建立了蒸气屏蔽保护壁的能力，但还无法直接确定锂蒸气对等离子体参数的影响。研究这一问题的实验是在 Magnum-PSI 中进行的，它能够在 DEMO 偏滤器相关条件下产生等离子体。 3D 打印填充锂的钨毛细管多孔结构已被用作靶材。使用往复式 Langmuir 探针来确定接近目标的电子温度和密度，同时由于蒸汽屏蔽而导致的冷却剂功率降低从 0% 增加到 50%。朗缪尔探针测量结果直接确定密度增加了高达 50%，而与固体目标参考情况相比，可以推断电子温度下降了高达 33%。
A liquid Li vapour-box divertor is an attractive heat exhaust solution for future fusion reactors. Previous works have established the ability of vapour shielding to protect the wall, but it has not been possible to directly determine the effects of Li vapour on the plasma parameters. Experiments to investigate this were carried out in Magnum-PSI, which is able to generate a plasma with DEMO-divertor relevant conditions. 3D printed tungsten capillary porous structures filled with Li have been used as targets. A reciprocating Langmuir probe was used to determine electron temperature and density close to the target, while the power reduction to the coolant due to vapour shielding was increased from 0% to 50%. The Langmuir probe measurements directly determined an increase of density by up to 50% while electron temperature could be inferred to have dropped by up to 33% compared to the solid target reference case.