Mesarosh L. Physics processes in low-temperature laser plasma and gas discharge of aluminum, tin and air

This tesis is dedicated to the investigation of the emission charecteristic and parameters of low temperature laser and glow-discharge plasma on the basis of aluminium, tin and air. In this work the emission, electrical and spatial characteristics and parameters of a glow discharge plasma with liquid cathode on the basis of distilled water and an aqueous solution of Al2(SO4)3 as well as low-energy laser erosion plasma of aluminum and tin were studied by using the electrical, optical and spectroscopic methods. Firstly the aluminum and tin laser plasma radiation were analysed by photographs, spectra and temporal dynamics which allowed to characterize its specific behavior in the near-threshold laser power and pressures from 6 to 133 Pa. On the basic of these experiments were determined the plasma's degree of ionization, the velocity of it, the ion recombination time, the temperature and the concentration of electrons. Additionaly the glow discharge plasma with liquid cathode on basis of distilled water and an aqueous solution of Al2(SO4)3 has shown the change of their characteristics and parameters such as electronic, vibrational and rotartional temperature and their change with discharge current from 12 to 36 mA.