Laser & Optoelectronics Progress, Volume. 60, Issue 17, 1712006(2023)
Double-Temperature Measurements of Arc Plasmas by Integrating Two-Wavelength Moiré and Emission Tomography
In this paper, a double-temperature refractive index model, which can be used to simultaneously obtain the temperatures of the electron and gas for plasma, is introduced. In addition, the rationality and superiority of the proposed model are theoretically discussed. Furthermore, argon arc plasmas with different injected pressures are selected as practical examples for experiments. During the experiments, refractive index measurements are performed using two-wavelength moiré tomography with probe wavelengths of 532 nm and 808 nm. The region division of the measured argon plasmas is achieved using emission tomography. Finally, the temperatures of the electron and gas are reconstructed to verify the feasibility of the double-temperature refractive index model, and the factors that might cause imprecision are analyzed. The findings of this study will be valuable for expanding the applicable region of optical computerized tomography methods and facilitating optical diagnosis in plasma flow fields .
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Junyan Zhuang, Yunyun Chen, Yayi Chen. Double-Temperature Measurements of Arc Plasmas by Integrating Two-Wavelength Moiré and Emission Tomography[J]. Laser & Optoelectronics Progress, 2023, 60(17): 1712006
Category: Instrumentation, Measurement and Metrology
Received: Jul. 4, 2022
Accepted: Sep. 26, 2022
Published Online: Aug. 29, 2023
The Author Email: Chen Yunyun (yunqq321@sina.cn)