Structure dynamics and optical properties of multicomponent plasma produced near a surface by pulsed CO2 and excimer lasers

摘要

Abstract: Results of the experimental studies of dynamics andoptical properties of laser-induced plasmas arepresented. Lasers with microsecond pulse width at$lambda $EQ 0.308 and 10.6 $mu@m were used. Spatiallyand temporally resolved plasma emission spectroscopyand laser beam absorption measurements were used toreveal plasma plume structure. It has been shown thatin the case of low absorption at the plasma front, atwo component plasma is formed with gas plasmatemperature above 3 eV and electron number density inboth gas and target vapor plasma in the range 10$+18$/- 3 $DOT 10$+19$/ cm$+$MIN@3$/. Comparison of theexperimental data with computer model predictions ispresented. !18