SYNCHRONIZED LASER ABSORPTION AND OPTICAL EMISSION SPECTROSCOPY OF PLASMA WITH COPPER VAPOUR ADMIXTURES

In this paper, a DC arc discharge plasma with copper vapour admixtures is studied by synchronized laser absorption (LAS) and optical emission spectroscopy (OES). The spatial and spectral characteristics of the arc discharge plasma between copper electrodes in an argon flow at atmospheric pressure were analysed. The emission spectra were recorded by the OES methods and the excitation temperatures and population of the energy levels of the copper atom corresponding to the upper levels of optical transitions with the wavelengths studied in this work were determined. In turn, the LAS method was used to determine the population of the lower energy level of one of the optical transitions under study. The synchronous application of both methods makes it possible to determine the radial distributions of the excitation temperatures and the number density of copper atoms. The consistency of the obtained results confirms the possibility of using synchronized laser absorption and optical emission spectroscopy in diagnostics of plasma with copper vapour admixtures.