In situ temperature measurement of vapor based on atomic speed selection
Lu Yu(于露)1, Li Cao(曹俐)1,†, Ziqian Yue(岳子骞)1, Lin Li(李林)1, and Yueyang Zhai(翟跃阳)2,‡
1 School of Instrument Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China; 2 Research Institute of Frontier Science, Beihang University, Beijing 100191, China
Abstract We demonstrate an experimental method for the in situ temperature measurement of atomic vapor using the saturated absorption spectrum. By separately manipulating the frequency of the pump and probe beams, the position of the crossover peaks can move along the spectrum. Different velocity classes of atoms contribute to the crossover during the movement. We study the relationship between the intensity change of peaks and vapor temperature. Our experimental result around room temperature shows a deviation of less than 0.3 K. Compared with traditional thermometry using absorption spectroscopy, higher accuracy can theoretically be achieved with real-time thermometry.
(Measurement methods and instrumentation to determine or evaluate Atmospheric parameters, winds, turbulence, temperatures, and pollutants in air)
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61703025).
Corresponding Authors:
Li Cao, Yueyang Zhai
E-mail: caoli722@buaa.edu.cn;yueyangzhai@buaa.edu.cn
Cite this article:
Lu Yu(于露), Li Cao(曹俐), Ziqian Yue(岳子骞), Lin Li(李林), and Yueyang Zhai(翟跃阳) In situ temperature measurement of vapor based on atomic speed selection 2023 Chin. Phys. B 32 020602
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