Faraday-effect polarimeter-interferometer system for current density measurement on EAST.
Faraday-effect polarimeter-interferometer system for current density measurement on EAST.
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DOI：
10.1063/1.4889777
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发表时间：
2014-07
期刊：
影响因子：
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通讯作者：
H. Liu;Y. Jie;W. Ding;D. Brower;Z. Zou;W. Li;Zhongli Wang;J. Qian;Yanji Yang;L. Zeng
中科院分区：
文献类型：
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作者：
H. Liu;Y. Jie;W. Ding;D. Brower;Z. Zou;W. Li;Zhongli Wang;J. Qian;Yanji Yang;L. Zeng
目前正在研制一种利用三波技术的多通道远红外激光偏振干涉仪（POINT）系统，用于EAST托卡马克装置的电流密度和电子密度分布测量。新型钼后向反射器安装在内壁上，用于双通光学装置。研制了一种用于POINT系统的250 kHz带宽的数字鉴相器，可实时提供法拉第旋转角和密度相移输出。初步标定表明，电子线积分密度分辨率小于5 × 10（16）m（-2）（± 2°），法拉第旋转角均方根相位噪声小于0.1°。
A multichannel far-infrared laser-based POlarimeter-INTerferometer (POINT) system utilizing the three-wave technique is under development for current density and electron density profile measurements in the EAST tokamak. Novel molybdenum retro-reflectors are mounted in the inside wall for the double-pass optical arrangement. A Digital Phase Detector with 250 kHz bandwidth, which will provide real-time Faraday rotation angle and density phase shift output, have been developed for use on the POINT system. Initial calibration indicates the electron line-integrated density resolution is less than 5 × 10(16) m(-2) (∼2°), and the Faraday rotation angle rms phase noise is <0.1°.