Critical Values Determination of Parameters of Fixed Electron Flows System in the Processing of Oxide Coatings on Extended Optical Elements

Authors I.V. Yatsenko1 , V.S. Antonyuk2 , V.P. Maslov 3, V.А. Vashchenko1 , V.I. Gordienko1

1Cherkasy State Technological University, 18006 Cherkassy, Ukraine

2National Technical University of Ukraine "Kyiv Polytechnic Institute named after Igor Sikorsky", 03056 Kyiv, Ukraine

3V.E. Lashkaryov Institute of Semiconductor Physics NAS of Ukraine, 02000 Kyiv, Ukraine

Issue Volume 16, Year 2024, Number 1
Dates Received 07 January 2024; revised manuscript received 20 February 2024; published online 28 February 2024
Citation I.V. Yatsenko, V.S. Antonyuk, et al., J. Nano- Electron. Phys. 16 No 1, 01005 (2024)
PACS Number(s) 42.79. Bh
Keywords Optoelectronic instrumentation, Optical elements, Nanoscale coatings of metal oxides, Electron beam processing, Thermal processes, Optimal control.

A mathematical model has been developed for the external uniformly distributed thermal effect on the surface of a flat bilayer element made of optical glass K108 and oxide coating with Al2O3, MgO, taking into account the temperature dependencies of their thermophysical properties (volumetric heat capacity and thermal conductivity). Critical values of external thermal impact parameters (heat flows and durations of their action) leading to the destruction of coatings (crack formation, detachment, delamination, etc.) have been determined. The problem of implementing a uniformly distributed thermal effect along the surface of the oxide coating using a system of fixed ribbon electron flows (REF) has been solved. These REFs are incorporated as a programmatically controlled module into the equipment of modern electron-beam devices. Permissible processing regimes for coating surfaces have been defined (the number of REFs, controlled parameters for each REF such as current, accelerating voltage, and distance to the processed surface). These regimes allow to improve their operational characteristics and prevent potential damage under extreme operating conditions of devices (elevated heating temperatures, thermal shock effects, etc.). Electron-beam processing of extended elements made of optical glass and ceramics, piezoceramic elements, as well as optical elements with coatings of metal oxides, is considered potentially capable of qualitatively processing their surfaces using a system of fixed REF. These REF can serve as the elemental basis in microoptics, integrated and fiber optics, functional electronics, and other fields of precision instrument engineering.

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