|
|
|
|
|
|
A Photoelastic Modulator Based MSE Spectroscopic Diagnostic on EAST |
LI Yi-chao1, 2, FU Jia1*, LÜ Bo1*, HUANG Yao1, QIAN Jin-ping1, LU Zheng-ping1, FU Sheng-yu1, LI Jian-kang1, WEI Yong-qing3, LIU Dong-mei4, XIAO Bing-jia1 |
1. Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
2. University of Science and Technology of China, Hefei 230026, China
3. School of Instrument Science and Optoelectronic Engineering, Hefei University of Technology, Hefei 230009, China
4. School of Electrical and Automation Engineering, Hefei University of Technology, Hefei 230009, China
|
|
|
Abstract Current density distribution is a crucial parameter in plasma physics, which plays an important role in plasma simulation, advanced operation mode development, current drive, confinement, and transport. The stark spectrum caused by injecting a neutral beam into plasma contains σ component, and π component. When viewed transversely to the electric field, the polarization direction of the σ component is perpendicular to the direction of the equivalent electric field, and the polarization direction of π component is parallel to the equivalent electric field, the distribution of current plasma density can be deduced by measuring polarization direction of the splitting spectrum.The polarization detection system based on a dual photoelastic modulator system has the unique advantages of high detection accuracy and quick time response, which is very suitable for measuring current density distribution under the rapid variation of plasma current. An external driving source causes the elastic deformation of birefringent crystals, and the refractive index changes periodically, then the modulated light intensity changes are formed through the polarizer. The polarization detection system of MSE diagnostic consists of two Photoelastic Modulators (PEM) and a polarizer. By detecting the ratio of modulation intensities at different modulation frequencies, the polarization direction of the splitting spectrum can be obtained quickly and accurately, and then the plasma current density distribution can be obtained. This paper introduces the polarization detection system of MSE diagnosis on Experimental Advanced Superconducting Tokamak (EAST), The off-line test and calibration of the system were completed, and the preliminary result of plasma current density distribution was obtained in experiments.
|
Received: 2021-04-12
Accepted: 2022-04-26
|
|
Corresponding Authors:
FU Jia, LÜ Bo
E-mail: fujia@ipp.ac.cn; blu@ipp.ac.cn
|
|
[1] Levinton F M, Fonck R J, Gammel G M, et al. Physical Review Letters, 1989, 63: 2060.
[2] Yu D L, Wei Y L, Xia F, et al. Review of Scientific Instruments, 2014, 85(5): 053508.
[3] Wroblewski D, Burrell K H, Lao L L, et al. Review of Scientific Instruments, 1990, 61(11): 3552.
[4] Stratton B C, Long D, Palladino R, et al. Review of Scientific Instruments, 1999, 70: 898.
[5] Fujita T, Kuko H, Sugie T, et al. Fusion Engineering and Design, 1997, 34-35: 289.
[6] Ko J, Chung J, Messmer M. Fusion Engineering and Design. 2016, 109: 742.
[7] Hu C D, Xie Y L, Xie Y H, et al. Plasma Science and Technology,2015,17:817.
[8] Yu Q J, Fu J, Liao K, et al. Fusion Engineering and Design,2020,153:111516.
[9] Fu J, Li Y Y, Lü B, et al. Review of Scientific Instruments, 2014, 85: 11D410.
[10] ZHOU Jun(周 军). Journal of Changshu College(常熟高专学报), 2001, 15(4): 19.
|
[1] |
FENG Ying-chao1, HUANG Yi-ming2*, LIU Jin-ping1, JIA Chen-peng2, CHEN Peng1, WU Shao-jie2*, REN Xu-kai3, YU Huan-wei3. On-Line Monitoring of Laser Wire Filling Welding Process Based on Emission Spectrum[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(06): 1927-1935. |
[2] |
WU Run-min1, XIE Fei1, SONG Xu-dong1*, BAI Yong-hui1, WANG Jiao-fei1, SU Wei-guang1, YU Guang-suo1, 2. The Mechanism of Hydrocarbon Flame Soot Formation in Spectral
Diagnosis: A Review[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2023, 43(01): 1-8. |
[3] |
HUANG Shi-cheng1, HUANG Yi-ming1, 2*, YANG Li-jun1*, YUAN Jiong1, LIN Zhi-xiong1, ZHAO Xiao-yan1. Analysis of Inverted Y-Shaped Arc Photoelectricity Characteristic of
Flux-Cored Wire Pulsed TIG Additive Manufacturing[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(08): 2579-2586. |
[4] |
YANG Jin-chuan1, 2, AN Jing-long1, 2, LI Cong3, ZHU Wen-chao3*, HUANG Bang-dou4*, ZHANG Cheng4, 5, SHAO Tao4, 5. Study on Detecting Method of Toxic Agent Containing Phosphorus
(Simulation Agent) by Optical Emission Spectroscopy of
Atmospheric Pressure Low-Temperature Plasma[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2022, 42(06): 1728-1734. |
[5] |
ZHAO Xiao-yan1, YANG Li-jun2*, HUANG Yi-ming1,2*, HUANG Shi-cheng1, LI Wang1. Study on Arc Characteristic of Flux-Cored Wire Pulse TIG Arc Additive Manufacturing[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2021, 41(08): 2397-2403. |
[6] |
LI Zhi-gang, XU Xiang, LI Yang, HUANG Wei. Study on Plasma Temperature and Electron Density During Arc Initiation by Underwater Wet Welding[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(11): 3404-3408. |
[7] |
ZHOU Ying1, BAI Yong-hui1, SONG Xu-dong1*, YAO Min3, WANG Jiao-fei1, SU Wei-guang1, YU Guang-suo1,2*. Application of Chemiluminescence in Spectral Diagnosis: A Review[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2020, 40(11): 3358-3364. |
[8] |
SONG Peng1, 3, ZHANG Wei2, CHEN Lei2*, WANG Xiao-fang1, LONG Wu-qiang1. Experimental Study on Ionization Characteristics of Dielectric Barrier Discharge with Different Electrode Structures[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2019, 39(02): 410-414. |
[9] |
LIU Ying1, YANG Li-jun1,2*, HE Tian-xi1, ZHAI Yong-lei1, LIU Tong1. The Spectral Analysis of TIG Welding Filled with Flux-Cored Wire[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(07): 2171-2176. |
[10] |
LI Xin-hui1, ZHANG Xiu-ying1*, MA Yuan-dan2, JIN Jia-xin1*, CHENG Min1, 3, ZHANG Xiao-min1, JIANG Hong1, 2. The Hyperspectral Diagnosis Model for Acid Stress of Cinnamomum camphora[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2017, 37(06): 1872-1878. |
[11] |
ZHANG Hua1, WU Jian-jun1*, HE Zhen1, LI Shi-liang2, ZHANG Yu1. Study on Plasma Characteristics in a Pulsed Plasma Thruster by Optical Emission Spectroscopy[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(06): 1867-1871. |
[12] |
DU Xiao1, YANG Li-jun1, 2*, LIU Tong1, JIAO Jiao1, WANG Hui-chao1 . The Spectral Analysis of Laser-Induced Plasma in Laser Welding with Various Protecting Conditions[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2016, 36(01): 15-19. |
[13] |
LI Ren-bing, SU Tie, ZHANG Long, CHEN Li, CHEN Shuang, LIU Ting-xu . New Implementation Technique of USED Phase Matching for CARS [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2015, 35(05): 1424-1427. |
[14] |
LIU Tong1, YANG Li-jun1, 2*, WANG Li-jun1, 2, WANG Lang-ping3 . A Comparative Analysis of the Passive Electric Probe Detection and Spectrum Diagnosis of Laser-Induced Plasma[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2014, 34(02): 289-292. |
[15] |
DONG Li-fang1, PAN Yu-yang2, SONG Qian1, JI Ya-fei1 . Spectra Line Profile and Vibrational Temperature of Dot and Line Discharge in a Dielectric Barrier Discharge[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2013, 33(01): 48-50. |
|
|
|
|