The emission spectra diagnosis in microwave argon and argon-air plasmas

This paper diagnoses the emission spectra of the Ar plasmas, which are excited at different pressure from 0.1 to 0.8 atm, and Ar-air plasma in open air with a unique microwave plasma generator-APMPS+JET system. The results demonstrate that the previous excited atom stations die out obviously as air is added; various factors play a part in the transform of atomic spectra lines, such as energy input, and voltage as well as the proportion of air input. With the decrease of pressure, the electron temperature and the intensity of spectrum increases in Ar plasma; the electron temperature is about 1.5~2eV at 0.8atm and rises to 4~5eV at 0.1 atm; the low wavelength components strengthen simultaneously.