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Information × Registration Number 0220U104389, 0120U104937 , R & D reports Title Transport of electron/positron bunches at high-gradient acceleration by electromagnetic fields excited in dielectric structures or plasma by a high power electron bunches and an intense laser pulse popup.stage_title Head Sotnikov Hennadii V., д.ф.-м.н. Registration Date 16-12-2020 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2  The purpose of the work was to perform the following tasks: 1. Determine the parameters of the wakefield excited by a laser pulse in a nonlinear mode in a plasma of metal density, depending on the parameters of the laser pulse. 2. Find the dispersion characteristics and topographies of electromagnetic fields of azimuthal eigenmodes of a cylindrical dielectric accelerator structure in which the drift channel is filled with a homogeneous cold plasma. 3. Determine the optimal structure of the electromagnetic field that occurs in the vacuum gap of the double diffraction gratings of different profiles when irradiated with laser pulses. As a result of these tasks, the following was obtained. In a study by the authors of the project, the proposal to accelerate the wake field in very density plasma was tested by computer simulation. It is observed that when the wake field is excited by two laser pulses, a record accelerating field is excited in the plasma of metal density, which is approximately 10^5 times larger than in modern metal accelerating structures. Studies of the dispersion characteristics of a cylindrical dielectric waveguide, in which the vacuum channel is filled with cold homogeneous plasma is carried out.. Cases of azimuthally symmetric and azimuthally asymmetric eigenwaves are considered. Resonant frequencies of eigenmodes are found. The topography of the axial component of the electromagnetic field is investigated. Numerical modeling of electric field distribution in chip structures with different types of profile is carried out. As an optimal, for further experimental verification, a rectangular symmetrical dielectric structure is selected, which provides acceleration along the entire trajectory of the particle in the structure. Product Description popup.authors Bolshov Olexander O Bondar Denis S Vasyliev Andrii V Galaydych Konstantin V Kniaziev Roman R Levchuk Irina P Onishchenko Ivan M popup.nrat_date 2020-12-16 Close