Kinetics of the spectrum and of the brightness temperature of an optical breakdown plasma near a glass surface

An investigation was made of the time and space characteristics of the spectrum and of the brightness temperature of a plasma formed near the surface of glass during some technological processes. It was found that when the energy of the incident radiation was 10⁶–10⁷ W/cm², an air spectrum appeared first and this changed in 6–8 μ sec to the emission spectrum of glass. In the same time the maximum brightness temperature of the plasma decreased from 7×10³ to 2×10³ K.