期刊
NEW JOURNAL OF PHYSICS
卷 18, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/18/11/113027
关键词
atmospheric pressure plasma jet; optical feedback cavity-enhanced absorption spectroscopy; hydroperoxyl radical
资金
- Leibniz Competition [SAW-2015-INP-5]
- Ministry of Education, Science and Culture of the State of Mecklenburg-Vorpommern [AU15001]
- European Union Seventh Framework Programme [316216]
- Natural Environment Research Council (NERC) [NE/M016439/1]
- NERC [NE/M016439/1] Funding Source: UKRI
- Natural Environment Research Council [NE/M016439/1] Funding Source: researchfish
Cold non-equilibrium atmospheric pressure plasma jets are increasingly applied in material processing and plasma medicine. However, their small dimensions make diagnosing the fluxes of generated species a challenge. Here we report on the detection of the hydroperoxyl radical, HO2, in the effluent of a plasma jet by the use of optical feedback cavity-enhanced absorption spectroscopy. The spectrometer has a minimum detectable absorption coefficient alpha(min) of 2.25 x 10(-10) cm(-1) with a 100 second acquisition, equivalent to 5.5 x 10(12) cm(-3) of HO2 (under ideal conditions). Concentrations in the range of (3.1-7.8) x 10(13) cm(-3) were inferred in the 4 mm wide effluent of the plasma jet.
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