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Information × Registration Number 0221U103656, 0116U007070 , R & D reports Title Electromagnetic processes in the intensive external fields and under interaction of the charged particles of large energy with crystalline and amorphous substances popup.stage_title Head Shulha Mykola F., д.ф.-м.н. Registration Date 23-02-2021 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description2 The bremsstrahlung of relativistic electrons and positrons during volume reflection in a bent crystal is considered. Computer modeling of the trajectories of electrons and positrons under volume reflection and calculations of the spectral-angular distributions of bremsstrahlung accompanying this phenomenon are carried out. The peculiarities of the spectral-angular and polarization characteristics of the radiation of ultrarelativistic electrons and positrons in the conditions of significant non-dipole and TSF-effect are investigated. It is shown that the bremsstrahlung of electrons and positrons under these conditions has a high degree of linear polarization. Based on the results obtained in the work, an experimental study is proposed. A quantum model of hard multi-photon emission by ultra relativistic electrons in a periodic field is proposed. This model makes it possible to represent the harmonic composition of the radiation field as the simultaneous scattering of several coherent photons and to obtain the energy distribution of the emitted electrons from the undulator parameter. The dependence of the average probability of radiation of harmonic component on the amplitude of the external periodic field is found. It is shown that this probability is equal to the square of the product of the mean angle of deviation of the electron trajectory in the periodic external field by the Lorentz factor of the electron. The model enables to analyze the evolution of the radiation spectrum and the electron spectrum of beam for various parameters of the external field. Product Description popup.authors Boyko Vadym V. Bondarenco Mykola V. Bulyak Evgen V. Gann Ganna V. Kirdin Artur I. Kyryllin Igor V. Koriukina Victoriia D. Lapko Vasyl P. Pol'shin Simeon O. Sliusarenko Oleksii Yu. Stepanovskii Yurii P. Trofymenko Sergii V. Truten' Valentin I. Fomin Oleksii S. Fomin Sergii P. Shulha Mykola F. Shulga Sergii M. popup.nrat_date 2021-02-23 Close