Spectroscopic diagnostics of a laser erosion plasma formed from CuSbS2 polycrystals

摘要

The spectra and dynamics of emission from regions of a laser plasma torch located at different distances from a polycrystalline CuSbS2 target irradiated by a neodymium laser (W = (3-5) x 10(8) W/cm(2), tau = 20 ns, f = 12 Hz, lambda = 1.06 gm) were investigated. The emission data were used to estimate the average temperature (less than or equal to0.82 eV) and the electron density ((1.82-1.92) X 10(16) cm(-3)) in the laser torch and the recombination times of ions (t(r)(S2+) = 15 ns, t(r)(Cu+) = 65-85 ns), as well as to analyze the efficiency of filling of excited atomic levels. A model describing the target destruction and the evolution of the processes accompanying spread of the laser plasma is proposed. (C) 2004 MAIK "Nauka/Interperiodica".