engleski

Laser-produced plasmas on Mg, Al and Si surfaces

Experimental investigations of laser-produced plasmas of Mg, Al and Si are described in this work. Plasmas were produced by nanosecond (6 ns) nitrogen laser pulses (337.1 nm) with maximal energy density of about 1.1 J/cm2 and studied by UV-VIS spectroscopy. The experiment gives us order of magnitude of electron density of 10E18 cm-3 and electron temperatures of about 1.5 eV in produced plasmas. Numerical modelling of target heating gives 4-5 times higher electron temperatures than experimentally determined ones. Significant change of features of laser-produced plasmas with successive atom number is not found. We showed that optical depth of particular material is main parameter for plasma production.

laser-produced plasma

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