Effect of magnetic field on the velocity autocorrelation and the caging of particles in two-dimensional Yukawa liquids

We investigate the effect of an external magnetic field on the velocity autocorrelation function and the "caging" of the particles in a two-dimensional strongly coupled Yukawa liquid, via numerical simulations. The influence of the coupling strength on the position of the dominant peak in the frequency spectrum of the velocity autocorrelation function confirms the onset of a joint effect of the magnetic field and strong correlations at high coupling. Our molecular dynamics simulations quantify the decorrelation of the particles' surroundings - the magnetic field is found to increase significantly the caging time, which reaches values well beyond the timescale of plasma oscillations. The observation of the increased caging time is in accordance with findings that the magnetic field decreases diffusion in similar systems

Non-Stationary Optical Transmission Spectra of Inhomogeneous Plasma of Nanosecond Electrical Discharges near Narrow Spectral Absorption Lines

Non-stationary optical plasma transmission spectra of high-speed ionization waves in cylindrical plasma waveguides filled with neon gas in the pressure range of 1-60 Torr have been experimentally investigated. The analysis of the results obtained in the experimental study of transmission spectra of nanosecond discharge plasma shows that in the propagation of laser irradiation at an angle to the axis of the plasma waveguide, the classical ratio for absorption by Beer-Lambert law is shifting

Effective Screened Potentials of Strongly Coupled Semiclassical Plasma

The pseudopotentials of particle interaction of astrongly coupled semiclassical plasma, taking into account bothquantum-mechanical effects of diffraction at short distances andalso screening field effects at large distances are obtained. Thelimiting cases of potentials are considered.Comment: 15 pages, TeX, 7 figure

Reflectivity of the dense xenon plasma

The investigation of optical properties of the dense xenon plasma is important for the realization of different technological applications [1-2]. In this work we consider the dense partially ionized xenon plasma consisting of the electrons, ions and atoms..

Cluster virial expansion for the equation of state of partially ionized hydrogen plasma

We study the contribution of electron-atom interaction to the equation of state for partially ionized hydrogen plasma using the cluster-virial expansion. For the first time, we use the Beth-Uhlenbeck approach to calculate the second virial coefficient for the electron-atom (bound cluster) pair from the corresponding scattering phase-shifts and binding energies. Experimental scattering cross-sections as well as phase-shifts calculated on the basis of different pseudopotential models are used as an input for the Beth-Uhlenbeck formula. By including Pauli blocking and screening in the phase-shift calculation, we generalize the cluster-virial expansion in order to cover also near solid density plasmas. We present results for the electron-atom contribution to the virial expansion and the corresponding equation of state, i.e. pressure, composition, and chemical potential as a function of density and temperature. These results are compared with semi-empirical approaches to the thermodynamics of partially ionized plasmas. Avoiding any ill-founded input quantities, the Beth-Uhlenbeck second virial coefficient for the electron-atom interaction represents a benchmark for other, semi-empirical approaches.Comment: 16 pages, 10 figures, and 5 tables, resubmitted to PR

The Influence of Ion-Plasma Treatment on the Strength Characteristics of Austenitic Stainless Steel with Different Grain Sizes

In given work, the tensile properties and nanohardness of fine-grained (3–6 μm) and coarse-grained (55 μm) austenitic stainless steel specimens subjected to ion-plasma treatment in a mixture of gases N2+C2H2+Ar at a temperature of 540 °C for 12 hours were experimentally investigated.В работе исследованы механические свойства при растяжении и нанотвердость мелкозернистых (3–6 мкм) и крупнозернистых (55 мкм) образцов аустенитной нержавеющей стали, подвергнутой ионно-плазменной обработке в смеси N2 + C2H2 + Ar при температуре 540 °C в течение 12 ч.Работа выполнена при финансовой поддержке стипендии Президента РФ (СП-14.2019.1)