Abstract
An incoherent broadband cavity-enhanced absorption spectroscopy setup employing a long optical cavity is described for sensitive in situ measurements of light extinction between 630 and . The setup was installed at the SAPHIR atmospheric simulation chamber during an intercomparison of instruments for nitrate () radical detection. The long cavity was stable for the entire duration of the two week campaign. A detection limit of for in an acquisition time of was established during that time. In addition to monitoring , nitrogen dioxide () concentrations were simultaneously retrieved and compared against concurrent measurements by a chemiluminescence detector. Some results from the campaign are presented to demonstrate the performance of the instrument in an atmosphere containing water vapor and inorganic aerosol. The spectral analysis of and , the concentration dependence of the water absorption cross sections, and the retrieval of aerosol extinction are discussed. The first deployment of the setup in the field is also briefly described.
© 2009 Optical Society of America
Full Article | PDF ArticleMore Like This
Weixiong Zhao, Xuezhe Xu, Bo Fang, Qilei Zhang, Xiaodong Qian, Shuo Wang, Pan Liu, Weijun Zhang, Zhenzhu Wang, Dong Liu, Yinbo Huang, Dean S. Venables, and Weidong Chen
Appl. Opt. 56(11) E16-E22 (2017)
Hongming Yi, Tao Wu, Guishi Wang, Weixiong Zhao, Eric Fertein, Cécile Coeur, Xiaoming Gao, Weijun Zhang, and Weidong Chen
Opt. Express 24(10) A781-A790 (2016)
Yabai He, Chunjiang Jin, Ruifeng Kan, Jianguo Liu, Wenqing Liu, Julian Hill, Ian M. Jamie, and Brian J. Orr
Opt. Express 22(11) 13170-13189 (2014)