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Photothermal probe beam deflection measurement of thermal diffusivity of atmospheric air |
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| Authors: | S. I. Yun Ki-Dong Oh Kwon-Sang Ryu Chang-Geon Kim H. L. Park H. J. Seo Chae Kum |
| Affiliation: | (1) Physics Department, University of Wisconsin, 53706 Madison, WI, USA;(2) Present address: Physics Department, Pusan National University, 607 Pusan, Korea;(3) Institute of Solid State Physics, Pusan National University, 607 Pusan, Korea;(4) Physics Department, Choong Nam National University, 300-31 Tae Jeon, Korea |
| Abstract: | We have used a modified photothermal probe beam deflection system with a back pumping configuration for the measurements of the temperature-dependent thermal diffusivity of atmospheric air. The results are consistent and reasonably well agree with the literature values. The measured thermal diffusivity values are the same for the same measuring temperature regardless of the beam offsets and the deflecting surface temperatures. For the gas with known temperature-dependent thermal diffusivity, this method can be used to deduce the temperature of a gas from the measured thermal diffusivity value. |
| Keywords: | 07.60 42.60 07.20 |
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