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Лещев, Сергей Валерьевич

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Институт фундаментальных проблем социо-гуманитарных наук
Институт фундаментальных проблем социо-гуманитарных наук (ИФП СГН) был создан в 2022 году для решения стратегических задач развития НИЯУ МИФИ. Основной целью создания ИФП СГН является повышение качества гуманитарного образования. В связи с этим, в число приоритетных задач Института входит: консолидация гуманитарных ресурсов НИЯУ МИФИ; курирование междисциплинарных исследований и проектов.
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20192
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Автор: Leshchev, S. ×

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    Formation of nanoscale structures in thin films deposited by reactive magnetron sputtering of binary metal targets in Ar+O2+N2 gas mixture
    (2019) Bernt, D.; Ponomarenko, V.; Leshchev, S.; Pisarev, A.; Лещев, Сергей Валерьевич; Писарев, Александр Александрович
    © Published under licence by IOP Publishing Ltd.Bi-metal targets of ZnSn and SiAl were sputtered in A+O2+N2 gas mixtures at various N2/O2 ratios, and the deposited films were investigated by AFM and XPS. No nitrogen was detected in the films even at the highest nitrogen partial pressure in the gas, and the films were oxides. The concentration of the doping metal component in the deposited film increases with the increase of nitrogen partial pressure in the working gas. These experimental observations were supported by numerical calculations of the sputter-deposition process using a SRIM/SIMTRA+RSD software. It was shown that added nitrogen promotes sputtering of doping metal components of the targets, and the concentration of oxygen remains high enough to substitute the less active nitrogen in the growing film. The films consisted of nanograins with the average diameter, which decreased from 18 nm to 3 nm with increase of nitrogen content in the working gas. This effect was explained by the mechanism of abnormal grain growth: the film consisted of grains of oxides of two metals with different concentrations. The doping metal forms very fine nanograins of oxides, which suppress the growth of oxides of the main metal. With increase of nitrogen in the working gas mixture, the sputtering rate of doping metals from the cathodes and their respective concentration in the growing films increases, so the average diameter of oxide grains forming the coating decreases.
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    Poster: Influence of the Direction of Movement of Earth-Moving and Construction Machines on the Stability of Remote Control Data Transmission via Mobile Communication Channels
    (2019) Golubeva, T.; Konshin, S.; Leshchev, S.; Mironova, N.; Tshukin, B.; Лещев, Сергей Валерьевич; Миронова, Наталия Борисовна; Щукин, Борис Алексеевич
    © 2019, Springer International Publishing AG, part of Springer Nature. In the article authors give research results of the influence of the movement direction of earth-moving machines on the stability of the remote control data transmission through mobile communication channels. The authors carried out an extensive analysis of the state of research in this and related fields. If movement direction of earth-moving and construction machines changes with respect to the nearest radio transmitting tower of the mobile communication base station, theoretically an instability in data transmission of data over mobile communication channels will appear. To establish the admissibility of such instability, experiments were performed in real conditions, the results of which are presented in the article.