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Improvement of Characteristics of Laser Source of Ions by Changing the Parameters of the Target and External Parameters

Rajabbfy Khaydarov, Holida Beysembaeva and Ravshan Khaydarov

Department of Physics, National University of Uzbekistan (NUUz), Tashkent 100174, Uzbekistan


Abstract: Laser-induced plasmas have received a lot of attention in recent years as a high-energy ion sources. However, practical applications of such ions sources require understanding and controlling key parameters affecting the properties of plasma ions. Here, we consider four different methods to improve characteristics of laser-induced plasma ions, namely, (1) effect of irradiating glass targets with gamma radiation on the parameters of laser-induced plasma particles, (2) influence of frequency of the repetition of laser pulses on the plasma ions generated on the surface of porous targets, (3) effect of light gas atom inclusions on the characteristics of laser-produced plasma ions and (4) effect of focusing condition of two-channel laser radiation on the formation of multicharge plasma ions. Our study will be based on the analysis of mass-charge spectrum of laser-produced plasma ions for different intensity of laser radiation. Both energy and intensity of plasma ions are affected by the gamma radiation due to the formation of optical inhomogeneities resulting in effective adsorption of laser radiation. The presence of light gas atoms in the target also affects the properties of the plasma species due to the mutual interactions between the plasma particles. The parameters of the laser radiation itself, such as frequency and the focusing condition, also have profound effect on the properties of the plasma ions. For example, the energy and intensity of the plasma ions can be controlled by changing the focus distance of the laser radiation. Our experimental results can be useful for controlling the properties of laser-induced plasma species for the practical applications as source of ions.

Key words: Laser, plasma ions, mass-spectrometer.
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