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Information × Registration Number 0224U032991, (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 Постановка завдань та визначення методів досліджень. Аналітичні та чисельні дослідження прототипів плазмових та діелектричних прискорювачів. Підготовка експериментальної бази для дослідження діелектричних прискорювачів. Head Sotnikov Hennadii V., Доктор фізико-математичних наук Registration Date 13-12-2024 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  An analytical and numerical study of the linear regime of wakefield excitation by a single relativistic electron bunch in a plasma-dielectric accelerator structure is carried out. The structure is a dielectric metal waveguide of cylindrical geometry with a vacuum channel along its axis for transporting charged particles with a plasma column. Analytical expressions for the longitudinal and radial wakefields excited by the bunch of finite dimensions are obtained. The axial and radial profiles of the amplitudes of the wakefield components are investigated, and their spectral analysis is carried out. By numerical study of the dynamics of charged particle bunches, it is shown how, by filling the transport channel of a dielectric wakefield accelerator with plasma to reduce the negative impact of the BBU instability and improve the characteristics of accelerated electron/positron bunches. The next characteristics of accelerated electron/positron bunches were obtained and investigated: transverse mean square size, emittance, energy spread, and efficiency of energy transfer from the drive electron bunch to the accelerated one. The electron gun was simulated using the Particle Tracking method. The influence of changes in the potentials of the electron gun elements on the beam characteristics was analyzed and shown. The final values of the potentials on the gun elements for BaO and Nanotip cathodes were obtained. As part of the reporting phase, the seed generator was adjusted to reduce beam divergence and increase signal intensity at the input of the first amplifier. A 1:2 telescope was installed, and a cooling system for the crystals was integrated. The first amplifier was configured, achieving an output power of 0.1 TW. Currently, the titanium-sapphire crystal for the second amplifier is undergoing final polishing, which will ensure the full functionality of the system. According to the results of research on a plasma electron source based on laser wake acceleration using Product Description popup.authors Bondar Denys S. Halaidych Kostiantyn V. Kniaziev Roman R. Kovalov Serhii M. Kryvonosov Hennadii O. Markov Petro I. Nizhankovskyi Serhii V. Svystunov Oleh O. popup.nrat_date 2024-12-13 Close