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Time resolved optical emission spectroscopy in power modulated atmospheric pressure plasma jet

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Hnilica J., Potočňáková L., Kudrle V.
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EN
In this paper, the effects of the power modulation on atmospheric pressure plasma jet, operated in Ar+2%N2 mixture, are studied. Time resolved optical emission spectroscopy is used for the investigation. From line and band intensities, the excitation, vibration and rotation temperatures are calculated. Their evolution during the modulation period exhibits a strong dependence on modulation frequency. For higher modulation frequencies, there is significant discrepancy in rotational temperatures calculated from OH spectra and from N2+ spectra, which indicates that thermalisation time can reach milliseconds.
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Physical features of atmospheric pressure microdischarge system with vortex gas flows

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Prysiazhnevych I., Lendel V., Chernyak V., Solomenko O., Martysh E., Iukhymenko V.
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issue 1
EN
The parameters for microdischarges of plasma medicine in air and argon vortex flows at atmospheric pressure for different shapes of electrodes (outlet nozzle and axis electrode diameters ratio set) have been investigated. The current-voltage characteristics of the designed systems have been analyzed, the parameters of the generated jets plasma have been investigated by means of the optical emission spectroscopy, and the form of plasma jets has been studied by using video camera.
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