Recent progress on the J-TEXT three-wave polarimeter-interferometer
Recent progress on the J-TEXT three-wave polarimeter-interferometer
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J-TEXT三波旋光干涉仪最新进展
DOI：
10.1088/2058-6272/ac64ef
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发表时间：
2022
影响因子：
1.7
通讯作者：
Yuan Pan
中科院分区：
文献类型：
--
作者：
Yuhan Wang;Li Gao;Peng Shi;Xin Xu;Yinan Zhou;Qinglong Yang;Chengyu Yang;Qinlin Tao;Chengshuo Shen;Yajun Wang;Lu Wang;Zhipeng Chen;Donghui Xia;Zhongyong Chen;Nengchao Wang;Zhoujun Yang;Yonghua Ding;Yuan Pan
用光学系统和平衡重构方法对测量电子密度和电流密度时空分布的J-TEXT三波偏振干涉仪系统（POLARIS）进行了优化。在等离子体小半径为-0.18 ~0.18 m的弦上，法拉第旋转角的相位分辨率从0.1度提高到0.06度，并通过法拉第旋转角的测量，探测到了等离子体的振荡行为。结合POLARIS测量数据和平衡拟合程序（EFIT），提出了一种改进的平衡重构方法，该方法能提供更精确的电流密度和电子密度的时空分布。通过优化的POLARIS和改进的平衡重建，随着密度的变化的轮廓已经进行了欧姆和电子回旋共振加热放电下。
The J-TEXT three-wave polarimeter-interferometer system (POLARIS), which measures time- space distribution of electron density and current density, has been optimized with both the optical system and the equilibrium reconstruction method. The phase resolution of a Faraday rotation angle has been improved from 0.1 to 0.06 degree in chords from –0.18 to 0.18 m (plasma minor radius), and the sawtooth oscillation behavior has been detected by Faraday rotation angle measurement. By combining the POLARIS measured data and the equilibrium and fitting code (EFIT), an upgraded equilibrium reconstruction method has been developed, which provides a more accurate temporal and spatial distribution of current density and electron density. By means of the optimized POLARIS and improved equilibrium reconstruction, variations of profiles with increasing density have been carried out, under both Ohmic and electron cyclotron resonance heating discharges.