Atmospheric pulsed DBD plasma jet for study on bacterial inactivation

A novel plasma jet with a plane-to-plane DBD structure working at atmospheric pressure has been developed. This jet is operated by a sub-microsecond pulsed voltage with a repetition rate of 1-10 kHz range. The working gas, helium, is fed into the plasma jet. The electrical property of the discharge...

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Bibliographische Detailangaben
Hauptverfasser: Jia Li, Sakai, N., Watanabe, M., Hotta, E.
Format: Tagungsbericht
Sprache:eng
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Zusammenfassung:A novel plasma jet with a plane-to-plane DBD structure working at atmospheric pressure has been developed. This jet is operated by a sub-microsecond pulsed voltage with a repetition rate of 1-10 kHz range. The working gas, helium, is fed into the plasma jet. The electrical property of the discharge has been studied by means of a classical DBD model. By fitting the fine structure of the emission bands of N 3 to a model, plasma gas is found to be cooled to near room temperature (~300 K) at 15 mm away from the jet nozzle exit, which is also verified by a thermocouple. Based on the analysis of the H β Stark broadening, the electron density inside the plasma jet nozzle is evaluated to be in the order of 10 14 cm -3 . Finally, the preliminary experiment confirmed the feasibility of disinfecting E.coli cells. It shows that adding oxygen could enhance the inactivating effect greatly and with 4% oxygen, the highest effect was obtained.
ISSN:2158-4915
2158-4923
DOI:10.1109/PPC.2011.6191593