Speaker
Sergey Blazhevich
(Belgorod National Research University)
Description
Diffracted transition radiation (DTR) generated by divergent beam of relativistic electrons crossing a single-crystal plate in different (Laue, Bragg) scattering geometry have been considered for general case of asymmetric reflection of electron coulomb field relative to the entrance target surface. The expressions for spectral-angular density of DTR and parametric X-ray Radiation (PXR) are derived. Then DTR and PXR have been considered in case of thin target, when multiple scattering of electron is negligibly small, that is important for divergence measurement in real time régime. Numerical calculation of spectral-angular density of DTR by a beam of relativistic electrons have been carried out with use of averaging over the bivariate Gauss distribution as angular distribution of relativistic electrons in the beam. It have been shown that in Bragg scattering geometry DTR has bigger angular density, than in Laue geometry what can be explained by existence of the frequency range, in which the incident wave propagation vector takes complex value even under absence of absorption. In this range all of photons will be reflected. It’s mean that the range of total reflection defines the width of DTR spectrum.
The Russian Science Foundation (project N 15-12-10019) supported this work.
Author
Sergey Blazhevich
(Belgorod National Research University)
Co-authors
Anton Noskov
(Belgorod National Research University)
Dr
Azamat Ligidov
(Belgorod National Research University)
Tatiana Koskova
(Belgorod National Research University)
