HL-2A装置送气和加料的脱靶特性

HL-2A装置辐射偏滤器实验采用边缘补充送气和分子束加料等方法来提高主等离子体密度，降低边缘等离子体温度、增加辐射功率分额，获得脱靶等离子体。偏滤器室内进行主动补充送气或者注入惰性气体杂质，降低偏滤器等离子体温度，获得脱靶等离子体，并首次获得了超声分子束注入产生脱靶等离子体的实验结果。利用HL-2A装置偏滤器同一极向截面内外中性化板上安装的嵌入式探针阵列和偏滤器室安装的电动探针系统，测量了偏滤器靶板上和偏滤器室的等离子体参数及其分布，并进行了相关分析和改善约束以及偏滤器脱靶等离子体运行模式下等离子体行为的研究。

Detachment characteristics with gas puffing and fuelling in the HL-2A tokamak

The detachment characteristics has been achieved in the H-2A detached divertor experiments, in which the supersonic molecular beam injection (SMBI) and gas puffing have been used to increase the main plasma density，to reduce the edge electron temperature and to increase the radiated power density, meanwhile, the fixed flush 3-probe arrays have been mounted on the 4 divertor neutralization plates to measure the profiles of the electron temperature, the electron density and the float potential. The detachment plasmas is obtained with SMBI for the first time in the HL-2A tokamak. The experimental results provide important physical parameters to investigate radiation divertor, detached divertor, as well as the abilities of impurity resident, concentration and removal efficiency.