EAST边界旋转诊断的光路分析

Sightline analysis of edge rotation diagnostic on EAST

具有空间和时间分辨的边界旋转诊断(ERD)已在EAST装置上研制完成,经调试已投入EAST实验研究中。多道光纤的观测视线已进行位置标定,经过分析,每道光纤所能耦合的离子辐射通量可表述为解析形式的弦积分量。使用卤素气体标准灯对光谱仪进行了波长标定,并确定了仪器响应函数。ERD可提供边界离子温度和旋转速度,是研究C、O、Li、N、He、Ar等离子在可见光波段辐射的有效工具。通过对CIII谱线的分析,得到了边界离子温度和边界旋转速度的初步实验结果,环向ERD初步实验结果表明ERD测量边界杂质离子温度及旋转速度的可行性。

Background： Edge rotation diagnostic system （ERD） with spatial and temporal resolution has been developed on EAST Tokamak. Purpose： The ERD system is an effective method to research the radiation phenomenon of C, O, Li, N, He and Ar in visible range. The ERD has been used for the measurement of ion temperature and rotation velocity at the edge plasma. Methods： The measurement was done by using an optical fiber spectrometer and two systems of lenses. Results： The ion radiant flux coupled by each fiber can be expressed as an analytical form, and the sightline of each fiber was determinated, and the spectrometer was calibrated by using a halogen lamp. Conclusions： The initial experimental results were obtained by analysing spectral lines of CIII, which results suggest that ERD has the ability to provide edge ion temperature and rotation velocity.