Abstract
Atmospheric-pressure argon plasma jet is generated with syringe needle-ring electrodes in an 8 kHz sinusoidal excitation voltage. It is found that the rotational temperature of nitrogen is in the range of 333 – 373 K obtained by comparing the simulated spectrum with the measured spectrum at the C3Πu → B3Πg (Δv = −2) band transition, the electronic excitation temperature is in the range of 3187 – 3243 K determined by the Boltzmann's plot method, and the oxygen atomic density is in the order of magnitude of 1016 cm−3 estimated by the actinometry method, respectively.
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