Real-Time Dynamic Spectrum Analysis for Plasma Electron Density and Faraday Rotation Angle Measurement on HL-2A

Electron density and Faraday rotation angle are important physical parameters in nuclear fusion research.To measure them simultaneously,the three-wave polarimeter/interferometer diagnostic system is applied.Both the final probe output signal and the reference signal contain three frequency component...

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Bibliographic Details
Published inPlasma science & technology Vol. 17; no. 12; pp. 1092 - 1096
Main Author 丁宝钢 吴军 范伟伟 吴彤宇 周艳 阴泽杰
Format Journal Article
LanguageEnglish
Published 01.12.2015
Subjects
Dynamic tests
Dynamics
Electron density
Field programmable gate arrays
HL-2A装置
Phase shift
Real time
Reference signals
Spectrum analysis
实时动态
法拉第旋转角
测量装置
现场可编程门阵列
电子密度
等离子体
频谱分析
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Summary:Electron density and Faraday rotation angle are important physical parameters in nuclear fusion research.To measure them simultaneously,the three-wave polarimeter/interferometer diagnostic system is applied.Both the final probe output signal and the reference signal contain three frequency components.The time-varying phase difference curve of each frequency component can be measured by the Real-time Dynamic Spectrum Analysis（RDSA）method based on Field-Programmable Gate Array（FPGA）.The phase difference precision is better than 0.1° and the real-time feedback delay is less than 1 ms,which satisfy the requirements of HL-2A.
Bibliography:Electron Spectrum Faraday rotation interferometer satisfy performing Angle instead rotating
DING Baogang , WU Jun , FAN Weiwei , WU Tongyu , ZHOU Yan, YIN Zejie（ 1State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei 230026, China ;2Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China ;3Southwestern Institute of Physics, Chengdu 610041, China ;4Shanghai Radio Equipment Institute, Shanghai 200090, China）
Electron density and Faraday rotation angle are important physical parameters in nuclear fusion research.To measure them simultaneously,the three-wave polarimeter/interferometer diagnostic system is applied.Both the final probe output signal and the reference signal contain three frequency components.The time-varying phase difference curve of each frequency component can be measured by the Real-time Dynamic Spectrum Analysis（RDSA）method based on Field-Programmable Gate Array（FPGA）.The phase difference precision is better than 0.1° and the real-time feedback delay is less than 1 ms,which satisfy the requirements of HL-2A.
34-1187/TL
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ISSN:1009-0630
DOI:10.1088/1009-0630/17/12/20