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...
Saved in:
Published in | Plasma science & technology Vol. 17; no. 12; pp. 1092 - 1096 |
---|---|
Main Author | |
Format | Journal Article |
Language | English |
Published |
01.12.2015
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
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 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1009-0630 |
DOI: | 10.1088/1009-0630/17/12/20 |