Minsk : National Academy of Sciences of Belarus; B.I. Stepanov Institute of Physics
Abstract
In this work, we present a study of the plasma generated by transversely excited atmospheric (TEA) CO 2 laser irradiation of a basalt sample. The plasma was induced in air at atmospheric pressure. For acquisition of emission spectra a time-integrated spatially resolved detection system was used. The excitation temperature was evaluated by the Boltzmann's plot method for selected Fe II spectral lines in the wavelength range 256-263 nm. The electron number density was determined from the Stark broadening of two iron lines, and results from both lines were identical within the experimental error. Signal to noise (SNR), ratio and limits of detection (LOD) for several elements were evaluated and compared to the results obtained using Nd:YAG laser and time-resolved LIBS measurements.Proceedings of the XI Belarusian-Serbian Symposium "Physics and Diagnostics of Laboratory and Astrophysical Plasmas" (РDР-11), December 15-19, Minsk, Belaru
