Detection of HO2 in an atmospheric pressure plasma jet using optical feedback cavity-enhanced absorption spectroscopy
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...
| Autors principals: | , , , , |
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| Format: | Journal article |
| Publicat: |
IOP Publishing
2016
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| Sumari: | 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 of cm-1 with a 100 second acquisition, equivalent to of HO2 (under ideal conditions). Concentrations in the range of (3.1-7.8) x1013 cm-3 were inferred in the 4 mm wide effluent of the plasma jet. |
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