A pulsed plasma jet with the various Ar/N(2) mixtures

In this paper, using the Optical Emission Spectroscopy technique, the physical properties of a fabricated pulsed DBDplasma jet are studied. Ar/N(2) gaseous mixture is taken as operational gas, and Ar contribution in Ar/N(2) mixture is variedfrom 75 to 95%. Through the optical emission spectra analysis of the pulsed DBD plasma jet, the rotational, vibrational andexcitation temperatures and density of electrons in plasma medium of the pulsed plasma jet are obtained. It is seen that, atthe wavelength of 750.38 nm, the radiation intensity from the Ar 4p → 4 s transition increases at the higher Ar contributionsin Ar/N(2) mixture. It is found that, for 95% of Ar presence in the mixture, the emission intensities from argon andmolecular nitrogen are higher, and the emission line intensities will increase nonlinearly. In addition, it is observed that thequenching of Ar* by N(2) results in the higher intensities of N(2) excited molecules. Moreover, at the higher percentages of Arin Ar/N(2) mixture, while all the plasma temperatures are increased, the plasma electron density is reduced.