Emission spectroscopy of an atmospheric pressure plasma jet operated with air at low frequency

15th Latin American Workshop on Plasma Physics; 21st IAEA TM on Research Using Small Fusion Devices

Giuliani, L.^2 ; Gallego, J.L.^1 ; Minotti, F.^2 ; Kelly, H.^2 ; Grondona, D.^2

Instituto de Física Del Plasma (INFIP), Consejo Nacional de Investigaciones Cientificas y Técnicas (CONICET), Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (UBA), Argentina^1

Ciudad Universitaria, Pabellón i, Buenos Aires

C1428EHA, Argentina^2

关键词: Atmospheric pressure plasma jets;    Electrical characteristic;    Experimental spectra;    Low temperatures;    Plasma medicines;    Positive systems;    Spectral simulations;    Spectroscopic characterization;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/591/1/012048/pdf
DOI  :  10.1088/1742-6596/591/1/012048

来源: IOP

【 摘 要 】

Low-temperature, high-pressure plasma jets have an extensive use in plasma biology and plasma medicine, such as pathogen deactivation, wound disinfection, stopping of bleeding without damage of healthy tissue, acceleration of wound healing, control of bio-film proliferation, etc. In this work, a spectroscopic characterization of a typical plasma jet, operated in air at atmospheric pressure, is reported. Within the spectrum of wavelengths from 200 to 450 nm all remarkable emissions of N2were monitored. Spectra of the N22nd positive system (C3Πu-B3Πg) emitted in air are the most convenient for plasma diagnostics, since they enable to determine electronic Te, rotational Trand vibrational Tvtemperatures by fitting the experimental spectra with the simulated ones. We used SPECAIR software for spectral simulation and obtained the best fit with all these temperatures about 3500K. The conclusion that all temperatures are equal, and its relatively high value, is consistent with the results of a previous work, where it was found that the experimentally determined electrical characteristic was consistent with the model of a thermal arc discharge, together with a highly collisional cathode sheet.