Numerical modelling of а propagation process and sedimentation of ablated particles in the scheme of a direct laser dusting
Numerical modelling of а propagation process and sedimentation of ablated particles in the scheme of a direct laser dusting
А.А. Antipov, S.M. Arakelyan, D.N. Buharov, S.V. Kutrovskaya, A.O. Kucherik, V.G. Prokoshev
In the given work results of experimental and theoretical researches of processes of distribution and sedimentation of the lazer-induced plasma in a problem of a direct laser dusting are considered. Researches were spent at influence of laser radiation on a carbon target in the presence of atmospheric air. The special experimental scheme has been developed for management of process of distribution of plasma, allowing to create gasdynamical channel with changeable geometry. Research of a surface of a cold substrate after laser influence has allowed to define presence of various zones of the sedimentation which formation can be explained by the features of plasmadynamical processes. For modelling of process of distribution of plasma the mathematical model based on the hydrodynamic approach has been offered. The offered model allows to define arising features in distribution of a stream near to a substrate surface. On the basis of modelling potential Lennard-Jhones with use of formed lines of a current calculations of the sizes of possible areas of sedimentation of products laser аblation are carried out.
Show AbstractAnalysis of synchronization features in 2D-lattices of diffusively coupled quadratic maps by means of local criterion of stochasticity
Analysis of synchronization features in 2D-lattices of diffusively coupled quadratic maps by means of local criterion of stochasticity
Kozlov A.A.
In the field of synchronization processes coupled map lattices (CML) represent paradigmatic models of extended systems exhibiting spatiotemporal chaos, self-organization and synchronization due to the rich variety of global qualitative behavior. In this article dynamics on 2D-lattice of diffusively coupled quadratic maps with periodic boundary conditions is shown in all patterns of its behavior which are turned out to be quite similar to those ones of 1D-chain. However some of its specific features are also revealed and discussed, especially in a strong coupling regime when domains of differently oriented 2-element clusters involved zig-zag dynamics in domains are competing with the formation of chaotic elements on the borderlines of the domains. The comprehension of such cooperative behavior and other synchronization patterns mostly appears with emergent method, developed in the form of local criterion of stochasticity which allows investigating not only the local behavior of individual elements, but the evolution of the global dynamics of the entire phase space. Our results show the effectiveness of the criterion on 2D-lattice of diffusively coupled qaudratic maps and other examples of regular networks, so it is believed to provide a powerful framework to study various types of synchronizability for networks of coupled maps depending on their architecture.
Show AbstractThe passive millimeter wave imaging system for detection of concealed threats
The passive millimeter wave imaging system for detection of concealed threats
D.P. Soldatov, V.V. Gladun, R.A. Pavlov, Yu.A. Pirogov, D.A. Tischenko
The 3-millimeter wave passive imaging system was developed in the microwave laboratory of MSU to detect and locate threats. Millimeter wave properties enable to design the passive system which can image objects in radiofrequency in real-time without illumination.
Show AbstractThe observed features of two-dimensional tunneling in external electric field.
The observed features of two-dimensional tunneling in external electric field.
V.Ch Zhukovsky, V.D. Krevchik, M.B. Semenov, R.V. Zaitsev, V.A. Rudin, P.V. Krevchik, I.A. Egorov
Controllability problem for two-dimensional dissipative tunneling in system of the tunnel-coupled quantum dots (quantum molecule), interacting quantum molecules or system “the AFM/ STM cantilever tip – quantum dot", simulated by 2D oscillator potential in a heat bath and external electric field, has been investigated. Obtained results are qualitatively corresponded to separate experimental VACs for system “platinized cantilever tip – golden quantum dot", which have been obtained in N. Novgorod State University. Earlier predicted 2D tunnel bifurcations with dissipation for case of parallel tunneling interacting particles are found as experimentally observed and stable ones.
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