Electron density calculation based on Stark broadening of D Balmer line from detached plasma in EAST tungsten divertor

The electron density within the volume of the tungsten divertor of the Experimental Advanced Superconducting Tokamak (EAST) is calculated based on D ε line (396.9 nm) Stark broadening (SB) measurements. The quasistatic approximation is employed in the SB calculation of the Dε line. The influences of other broadening mechanisms on the calculation error of electron density have been evaluated. The SB method is applied to the study of spatial distribution and time evolution of the electron density in the W divertor.

本数据集基于Dε谱线（396.9 nm）的斯塔克展宽（SB）测量结果，对实验先进超导托卡马克（EAST）钨偏滤器体积内的电子密度进行计算。Dε谱线的斯塔克展宽计算采用了准静态近似方法。研究评估了其他展宽机制对电子密度计算误差的影响，并将该斯塔克展宽方法应用于钨偏滤器内电子密度的空间分布与时间演化研究。