Low Temprature Properties of T Shape Photoacoustic Cell and Applications
NIU Ming-sheng1, 2, LIU Qiang1, 2, WANG Gui-shi1,2, YUAN Yi-qian2, HUANG Wei1, ZHANG Wei-jun1, GAO Xiao-ming1, 2*
1. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China 2. Atmospheric Optics Key Laboratory, Anhui Institute of Optics & Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
Abstract：A homemade low-temperature T shape photoacoustic system (PAS) in the range from 0 to -100 ℃ is well established. The mode distribution, the temperature dependence of the resonant frequency, Q-factor and the sensitivity of the PAS were investigated. The measurement of the carbon dioxide in the range from 0 to -100 ℃ showed that the system can be used in trace gas detection under low-temperature. The results show that the PAS can be used to study the atmospheric molecules continuous absorption at low-temperature.
Key words：T shape cell;Low-temperature;Photoacoustic cell properties;Trace gas detection
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