Determination of temperature in a plasma jet emanating from a plasma torch with sectioned inter-electrode insert from the molecular emission spectrum of nitrogen
A.A. Mikhalchenko1, E.V. Kartaev1, V.I. Kuzmin1, V.I. Nalivaiko2, P.A. Chubakov2
1 Khristianovich Institute of Theoretical and Applied Mechanics SB RAS
2 Institute of Automation and Telemetry SB RAS
Keywords: low-temperature plasma, atomic spectroscopy, molecular spectroscopy, electron temperature, vibrational temperature, rotational temperature, modelling of the molecular emission spectrum of nitrogen
Pages: 629-641
Abstract
Results of application of a method for measuring the distribution of temperature in a nitrogen plasma jet emanating from a dc plasma torch with sectioned inter-electrode insert from the relative intensities of the molecular emission bands of nitrogen in the N2+(B2Σu+ − X2Σg+) first negative and N2(C3Пu+ − B3Пg+) second positive systems are reported. The emission spectra were registered using a small-size spectrometer with medium-range spectral resolution enabling a contour analysis of ro-vibrational bands in molecular emission spectra. The obtained distribution of temperature was compared with the distribution that was determined from the emission lines due to copper atoms and with the mean-mass plasma temperature of the air plasma jet.
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