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Information × Registration Number 0225U004249, (0124U004024) , R & D reports Title Elaboration of high-gradient accelerators of charged particles based on the excitation of intense electromagnetic fields in plasma and dielectric structures by high-current electron bunches or a powerful laser pulse popup.stage_title Оптимізація характеристик згустків заряджених частинок (енергетичний розкид, еміттанс, розміри, кутова розбіжність, струм) у плазмових, плазмо-діелектричних та діелектричних схемах прискорення. Налаштування вузлів макету діелектричного лазерного прискорювача (лазерної системи та джерела електронів). Head Sotnikov Hennadii V., Доктор фізико-математичних наук Registration Date 27-11-2025 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 Experimental and theoretical development of accelerators of subrelativistic and relativistic electron and positron bunches with a high acceleration gradient based on the excitation of electromagnetic fields with high amplitude in dielectric structures or plasma by high current electron bunches and intense laser pulses, as well as well as tracking dynamics of the main parameters of accelerated bunches (kinetic energy, energy spread, transverse size and normalized emittance). popup.description2 To analyze the BBU instability, the current flowing through the cross section of the channel for transporting charged particles was calculated as a characteristic. To demonstrate the dynamics of the change in the drive bunch current, the current through the cross section of the waveguide was analyzed for three values of the longitudinal coordinate, namely: 8 cm, 16 cm and 24 cm. The method of compensation of dispersion of higher orders was further developed. Analytical solutions were obtained for the simultaneous compensation of dispersions of the second and third orders. Based on these solutions, the optimal parameters for adjusting the diffraction gratings of the compressor were determined: angular disorder Δγ = 0.312° and linear displacement ΔL = 6.41 mm. A high-voltage power supply system was developed, necessary for stable operation of the thermionic gun and electron beam formation. A high-voltage power supply unit for 47 kV with pulsations of no more than 0.1% was developed, which ensures uniform acceleration of electrons and minimizes energy dispersion. Electrical calibration and testing in a vacuum were carried out. A comprehensive method of electron beam formation in the thermionic gun was improved by optimizing the operating modes of the modulator, intermediate and focusing electrodes. Experiments in high-vacuum conditions allowed determining the optimal operating parameters, which ensured the receipt of a stable beam with a diameter of about 0.2 mm at a final energy of 32 keV. The dependence of the parameters of self-injected bunches in a plasma channel with inhomogeneous plasma density was studied. The advantage of such a configuration over a cylindrical channel for obtaining self-injected bunches with a 2.1 Product Description popup.authors Roman R. Kniaziev Kostiantyn V. Galaydych Gennadii O. Kryvonosov Petro I. Markov Sergiy M. Kovalyov Oleh Svystunov Denys S. Bondar popup.nrat_date 2025-11-27 Close