2024

Постійне посилання на фонд

https://ela.kpi.ua/handle/123456789/71007

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Перегляд 2024 за Ключові слова "004.942:537.525"

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  • Ескіз
    ДокументВідкритий доступ
    Comparison of methods for interpolation and extrapolation of boundary trajectories of short-focus electron beams using root-polynomial functions
    (КПІ ім. Ігоря Сікорського, 2024) Melnyk, Igor V.; Pochynok, Alina V.; Skrypka, Mykhailo Yu.
    The article considers and discusses the comparison of interpolation and extrapolation methods of estimation of the boundary trajectory of electron beams propagated in ionized gas. All estimations have been computed using root-polynomial functions to numerically solve a differential-algebraic system of equa-tions that describe the boundary trajectory of the electron beam. By providing analy-sis, it is shown and proven that in the case of solving a self-connected interpolation-extrapolation task, the average error of the beam radius estimation is generally smaller. This approach was especially effective in estimating the focal beam radius. An algorithm for solving self-connected interpolation-extrapolation tasks is given, and its efficiency is explained. Corresponding graphic dependencies are also given and analyzed
  • Ескіз
    ДокументВідкритий доступ
    Evaluation of the thermal regime of the cathode opera-tion of a high-voltage glow discharge electron gun, which forms a ribbon electron beam
    (КПІ ім. Ігоря Сікорського, 2024) Melnyk, I. V.; Tuhai, S. B.; Kovalchuk, D. V.; Surzhikov, M. S.; Shved, I. S.; Skrypka, M. Yu.; Kovalenko, O. M.
    The article discusses the various methods of estimating the surface cathode temperature of the high-voltage glow discharge electron gun, which forms a ribbon electron beam with a linear focus. Numerical estimations have been made to design the cathode assembly of an industrial gun. It is shown that the most effective way to make approximate estimates of the temperature of the cathode surface in high-voltage glow discharge electron guns for various technological purposes is to use arithmetic-logical ratios for modeling the geometry of the cathode assembly and locus functions for estimating the temperature distribution. The accuracy of such estimates, made using the heat balance equation, was 5–10%, sufficient at the initial stage of designing an electron gun. It is shown that using the SolidWorks CAD software complex for designing high-voltage glow discharge electron guns is effective only for solving the complex engineering design tasks and preparing the corresponding technical documentation. The results of the theoretical research published in the article are of interest to a wide range of specialists engaged in developing electron beam equipment and its implementation in industrial production.