Conditions defining the mechanisms of the formation of light gas ions in multicomponent laser-produced plasmas

Abstract

Using the mass-spectrometric method we study the charge, energy and spatial characteristics of ions in multicomponent plasma, generated under the action of Nd : YAG laser radiation on the surface of solid targets. We focus on the effect of the entry form of light gas atoms on the parameters of ions in such laser-produced plasmas. We found that the presence of light gas atoms considerably affects the parameters (e.g. the intensity and the charge multiplicity) of the heavier ions.

Spectra of Multiply Charged Hydrogen and Nitrogen Ions in the Composition of Two and Multi-element Laser Plasma

“…The study of the physical processes of ionization, recombination and acceleration of multiply-charged ions occurring in a two-element laser plasma at the stages of formation and expansion, depending on the composition of the target and its implementation in practice, can be considered very relevant [5]. The need for such studies is justi ed by the fact that it is the e ciency of these physical processes of formation and inertial expansion of multiply charged ions that determine the yield, charge, energy and spatial distribution of multiply charged ions [6,7]. The results obtained in this way will contribute to creating a complete picture of the processes of forming an ion ux in a two-component laser plasma [11].…”

“…-the need to study the phenomena arising from the interaction of multiply charged ions with the surface of a solid, such as secondary electron (kinetic and potential) emission; -cathode sputtering of metals and insulators; obtaining neutron-enriched and proton-enriched isotopes; carrying out nuclear reactions involving multiply charged ions, etc [7].…”

Spectra of Multiply Charged Ions in Laser Plasma Formed from Gas-Containing Targets

“…It is necessary to reduce the current of low-charged ions and increase the current of highly-charged ions. Controlling the laser power density and selecting various single-element targets to increase the yield and charge of ions did not give the expected outcome [4]. In order to increase the efficiency of ionization processes in a plasma plume and reduce the efficiency of recombination processes, intensive studies are being carried out on the charge and energy state of monoand multi-element laser plasma.…”

Effect of light gas atom inclusions on the characteristics of laser-produced plasma ions

“…LIS also shows the possibility of generating higher charge states. Many theoretical [7,8] and experimental [6,[9][10][11][12][13][14] works have been carried out in order to optimize the performance of the LIS and to determine important operating parameters such as the velocity, mass and charge-state distribution of the generated ion beam and plasma temperature. Haseroth and Hora [7] studied the physical mechanisms that lead to higher current of multicharged ions in laser-produced plasmas.…”

“…As a continuation of our previous work [9], here we study the effect of these impurities on the parameters of laser-produced plasma ions. It is obvious that these inclusions can change not only the physical properties of the materials, but also influence the formation of plasma ions [12]. Therefore, we conducted systematic studies on the effect of light gas atoms on the formation process of targets made of heavier components such as Cu [H], Ti [H] and Zr [H, N].…”