Polarimeter–interferometer diagnostic using terahertz solid-state sources for fluctuation measurements on Keda Torus eXperiment (KTX)

Xingkang WANG; Wenzhe MAO; Jinlin XIE; Tao LAN; Hong LI; Adi LIU; Chu ZHOU; Xiaohui WEN; Zian WEI; Jie WU; Chen CHEN; Dongkuan LIU; Xianhao RAO; Hu CAI; Jiaren WU; Peng DENG; Haiqing LIU; Weixing DING; Ge ZHUANG; Wandong LIU

doi:10.1088/2058-6272/ad0d55

Plasma Science and Technology > 2024 > 26(3): 034009. > DOI: 10.1088/2058-6272/ad0d55

Xingkang WANG, Wenzhe MAO, Jinlin XIE, Tao LAN, Hong LI, Adi LIU, Chu ZHOU, Xiaohui WEN, Zian WEI, Jie WU, Chen CHEN, Dongkuan LIU, Xianhao RAO, Hu CAI, Jiaren WU, Peng DENG, Haiqing LIU, Weixing DING, Ge ZHUANG, Wandong LIU. Polarimeter–interferometer diagnostic using terahertz solid-state sources for fluctuation measurements on Keda Torus eXperiment (KTX)[J]. Plasma Science and Technology, 2024, 26(3): 034009. DOI: 10.1088/2058-6272/ad0d55

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Polarimeter–interferometer diagnostic using terahertz solid-state sources for fluctuation measurements on Keda Torus eXperiment (KTX)

1.
School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People’s Republic of China
2.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China

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Author Bio:
Wenzhe MAO: maozhe@ustc.edu.cn
Corresponding author:
Wenzhe MAO, maozhe@ustc.edu.cn
Received Date: July 06, 2023
Revised Date: October 18, 2023
Accepted Date: October 28, 2023
Available Online: February 07, 2024
Published Date: February 11, 2024

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Abstract

Abstract

A multi-channel polarimeter–interferometer has been developed on the Keda Torus eXperiment (KTX) for the study of equilibrium dynamics and internal magnetic fluctuations. A three-wave technique based on terahertz solid-state sources (~650 GHz) is applied for simultaneous measurements of electron density and Faraday rotation angle. The output power of the microwave source is 2 mW. Faraday rotation effect using a rotating wave plate is tested with phase noise less than 0.8°, and the density phase noise is less than 0.9°. Measurement of Faraday rotation angle and density for discharges on KTX have demonstrated high sensitivity to internal MHD activities.
- plasma diagnostics,
- interferometry,
- terahertz,
- polarimeter

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References (17)

References

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