Development of the CO2 dispersion interferometer on HL-2M tokamak

doi:10.16568/j.0254-6086.2021s2015

Nuclear Fusion and Plasma Physics ›› 2021, Vol. 41 ›› Issue (s2): 510-515.DOI: 10.16568/j.0254-6086.2021s2015

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Development of the CO2 dispersion interferometer on HL-2M tokamak

WANG Hao-xi, LI Yong-gao, LI Yuan, WEN Ruo-nan, YI Jiang, WANG Zai-hong, SHI Zhong-bing, ZHOU Yan#br#

(Southwestern Institute of Physics, Chengdu 610041)

Received:2021-05-14 Revised:2021-07-30 Online:2021-11-15 Published:2022-01-10

HL-2M 装置 CO2 色散干涉仪研制

王浩西，李永高，李远，文若楠，易江，王再宏，石中兵，周艳

(核工业西南物理研究院，成都 610041)

作者简介:王浩西(1991−)，四川德阳人，博士，助理研究员，从事等离子体诊断研究。
基金资助:
国家重点研发专项(2019YFE03020004，2019YFE03090500)；四川省科技计划项目(2020YJ0463)；核工业西
南物理研究院人才项目(202001XWCXRC012，201901XWCXRC003)

Abstract

Abstract: A CO₂ dispersion interferometer on HL-2M tokamak is designed and commissioned to meet the
requirement of electron density measurement. The system adopts the dispersion measurement principle based on
second harmonic generation, and can eliminate the phase error caused by mechanical vibration. The system uses a
new phase modulation signal modulation, and a data acquisition/analyzing/uploading system is developed.
Density curve measured by CO₂ dispersion interferometer was in agreement with the curve measured by
microwave interferometer, density resolution of the system was about 2×10¹⁷m⁻³, and the measuring range was up
to 10²¹m⁻³.

Key words: HL-2M tokamak, CO2 laser, Dispersion interferometer, Second harmonic generation

摘要： 研制了一套新型 CO₂ 激光色散干涉仪用于 HL-2M 装置初始放电期间的电子密度测量。该系统采用
基于激光倍频的色散测量原理，能够消除机械振动产生的相位误差。该系统使用全新的调相式信号调制，研发了
相应的数据采集/处理/上传系统。根据实验测量结果表明，CO₂ 激光色散干涉仪和微波干涉仪测量曲线基本一致，
色散干涉仪系统的测量精度约为 2×10¹⁷m⁻³，密度测量上限能达到 10²¹m⁻³。

关键词: HL-2M 装置；CO2 激光；色散干涉仪；倍频

CLC Number:

TL65+3

WANG Hao-xi, LI Yong-gao, LI Yuan, WEN Ruo-nan, YI Jiang, WANG Zai-hong, SHI Zhong-bing, ZHOU Yan. Development of the CO2 dispersion interferometer on HL-2M tokamak[J]. Nuclear Fusion and Plasma Physics, 2021, 41(s2): 510-515.

王浩西, 李永高, 李远, 文若楠, 易江, 王再宏, 石中兵, 周艳. HL-2M 装置 CO2 色散干涉仪研制[J]. 核聚变与等离子体物理, 2021, 41(s2): 510-515.

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Development of the CO2 dispersion interferometer on HL-2M tokamak

HL-2M 装置 CO2 色散干涉仪研制

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