Decaying of Nitrogen Second Positive System by Addition of H2 Gas in Air DB Discharge

DOI: 10.4236/jmp.2013.42022   PDF   HTML   XML   4,535 Downloads   6,547 Views   Citations


Effects of addition of H2 gas in air DB discharge on its optical and electrical characteristics have been studied. Optical emission spectroscopy is used to investigate the effect of hydrogen admixing on the emission intensity of the nitrogen second positive systems (300 - 420 nm) and the relative population density of states. An obvious decaying of the emission intensity of the nitrogen second positive bands with the introduction of H2 has been observed. It has been concluded that quenching of the nitrogen excited state is the responsible reason of this decaying. Mechanisms of excitation and ionization processes of nitrogen molecules in this mixture have been studied. Processes which are responsible for the decaying of the population density of have been reported. Addition of H2 to air improves the electrical characteristics of the DB discharge. An abrupt increasing in the electron density, reached about thirty fold at H2 flow rate of 3 L/min, as a result of increasing the ionization processes has been reported. The breakdown voltage of the discharge decreased from 1.87 kV to about 1.25 kV by the addition of H2 at flow rate of 3 L/min.

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D. El-Zeer, A. Samir, F. Elakshar and A. Garamoon, "Decaying of Nitrogen Second Positive System by Addition of H2 Gas in Air DB Discharge," Journal of Modern Physics, Vol. 4 No. 2, 2013, pp. 160-167. doi: 10.4236/jmp.2013.42022.

Conflicts of Interest

The authors declare no conflicts of interest.


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