液态锂限制器的铺展性测试平台设计及初步实验

为研究液态锂在电磁驱动限制器表面的铺展特性，设计了与EAST限制器接口相同的限制器测试平台。该平台运行时真空环境可达10^-4Pa，对被测限制器可加热至350℃。在限制器锂回路管道上，利用外部2T水平磁场以及竖直方向施加的最大为200A的直流电流，形成电磁驱动力驱动下的锂液循环回路。测试平台设有顶部和正面两个观察窗，能够在可视化条件下，完成液态锂限制器的铺展性测试实验。基于该测试平台，对首次设计的双通路液态锂限制器，研究了不同实验温度和驱动电流下液态锂在限制器表面的流动铺展情况。结果发现，锂的流量和限制器表面结构是影响锂液铺展的主要因素。

Spreading test platform and preliminary experiment of liquid lithium limiter

A liquid lithium limiter test platform with the same mechanical interface of EAST is designed to study the spreading characteristics of liquid lithium on the limiter. The vacuum pressure of the platform is less than 10^-4Pa and the temperature is up to 350℃ for working conditions. An external horizontal magnetic field with a maximum strength of 2T coupled with a vertical direct current up to 400A is used to generate the electromagnetic force to drive the flow of liquid lithium in the loop. The spreading characteristics of liquid lithium on the limiter surface are captured from two visual windows in the top and front of the platform. Basing on this platform, a new designed liquid lithium limiter with dual-channel is tested to study its surface spreading characteristics under different temperature and driving current. The present results show that the lithium flow rate and the limiter surface structure are two main factors that influence the spreading characteristics of lithium on the limiter surface.