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Your search keyword '"Ismagilov, A. R."' showing total 1,491 results
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1,491 results on '"Ismagilov, A. R."'

30. Processing slightly resolved ro-vibrational spectra during chemical vapor deposition of carbon materials: machine learning approach for plasma thermometry

Author

Ismagilov, R. R., Kudarenko, I. P., Malykhin, S. A., Babin, S. D., Loginov, A. B., Kleshch, V. I., and Obraztsov, A. N.

Subjects
Physics - Plasma Physics, Physics - Applied Physics, Physics - Data Analysis, Statistics and Probability
Abstract

A fast optical spectroscopic method for determination rotational ($T_{rot}$) and vibrational ($T_{vib}$) temperatures in two-temperature Boltzmann distribution of the excited state by using machine learning approach is presented. The method is applied to estimate molecular gas temperatures in a direct current glow discharge in hydrogen-methane gas mixture during plasma-enhanced chemical vapor deposition of carbon film materials. Slightly resolved ro-vibrational optical emission spectrum of the $C_2$ ($\nu'=0 \to \nu''=0$) Swan band system was used for local temperature measurements in plasma ball. Random Forest algorithm of machine learning was explored for determination of temperature distribution maps. In addition to the $T_{rot}$ , $T_{vib}$ maps, distribution maps and their gradients for electron temperature ($T_e$) and for the emission intensity of the spectral line 516,5$nm$ corresponding to $C_2$ species is presented and is discussed in detail.

Published
2020

31. Coulomb blockade in field electron emission from carbon nanotubes

Author

Kleshch, Victor I., Porshyn, Vitali, Serbun, Pavel, Orekhov, Anton S., Ismagilov, Rinat R., Malykhin, Sergey A., Eremina, Valentina A., Obraztsova, Elena D., Lützenkirchen-Hecht, Dirk, and Obraztsov, Alexander N.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics
Abstract

We report the observation of Coulomb blockade in field electron emission (FE) from single-wall carbon nanotubes (SWCNTs), which is manifested as pronounced steps in the FE current-voltage curves and oscillatory variations in the energy distribution of emitted electrons. The appearance of the Coulomb blockade is explained by the formation of nanoscale protrusions at the apexes of SWCNTs due to the electric field-assisted surface diffusion of adsorbates and carbon adatoms. The proposed adsorbate-assisted FE mechanism is substantially different from the well-known resonant tunneling associated with discrete electronic states of adsorbed atoms. The simulations based on the Coulomb blockade theory are in excellent agreement with the experimental results. The SWCNT field emitters controlled by the Coulomb blockade effect are expected to be used to develop on-demand coherent single-electron sources for advanced vacuum nanoelectronic devices., Comment: 19 pages, 8 figures

Published
2020
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33. Using Mathematical Modeling to Analyze the Strength Properties of Different Designs of Liquid Hydrogen Transportation Tank

Author

Peshkov, R. A., Shabley, A. A., Ismagilov, D. R., Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Radionov, Andrey A., editor, and Gasiyarov, Vadim R., editor

Published
2023
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