Lead, a toxic heavy metal, poses significant threats to both environmental ecosystems and human health. Its persistence in the environment, coupled with its potential for bioaccumulation, are key factors contributing to its harmful impact. Given the interrelated nature of environmental components, lead can easily infiltrate the food chain, resulting in serious health risks for both humans and...
Ultra-short laser pulse generation, along with extreme nonlinear processes such as high-harmonic generation, are extensively studied and actively evolving areas in modern photonics. Since their discovery, researchers have been addressing challenges like spectral broadening, filamentation, pulse and beam diagnostics, pulse amplification, and coherent beam recombination.
A key application...
Laser-induced breakdown spectroscopy (LIBS) is a powerful and rapid optical emission spectroscopy used for the elemental analysis of a wide variety of materials. In contrast to spectroscopic methods dependent on X-rays (e.g. XRF), LIBS offers the ability for trace analysis even for light elements. The emission from microplasma created by a focused 30 fs pulse laser beam at λ=800nm, is...
7Be and 210Pb air concentrations were measured by gamma spectrometer with a High Purity Germanium detector (HPGe). The data obtained on activity concentration for both radionuclides provide key information on the origins and movements of air masses. A routine air radioactivity monitoring has started since 2021 in a typical aerosol sampling station, ASS -500, located at the Institute of...
Laser-driven experiments are strongly influenced by non ideal temproral profile of laser pulse. Laser main pulse is preceded by by low a long low intensity prepulse. Prepulse intensity is up to $10^{14}$ times smaller then main pulse intensity but its duration can reach 2.5 ns [1]. During the prepulse the target is heated up and preplasma appears in front of the target. Preplasma influences...
In this talk we will describe a new, simple and robust method for generating long-range Bessel-Gaussian beams with divergences on the microradian scale. The approach is entirely based on singular and Fourier optics. Initially, an optical vortex (OV) with a high topological charge (~20 and higher; [1]) is formed on the input Gaussian laser beam with a flat wavefront. Due to the modulation...
