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A new type deflector of a charged particle beam based on pyroelectric crystals is proposed and demonstrated experimentally. The transverse electric field arises in the gap between two pyroelectric crystals in vacuum because of the pyroelectric effect appearing when a temperature gradient is applied to both crystals. In a proof-of-principle experiment, we demonstrated deflection of a low-energy electron beam. The application of pyroelectric deflectors as bending elements in the pyroelectric undulator for production of the undulator radiation is proposed.

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We investigated the transmission of 10 keV electrons through insulating nanocapillaries of various diameters from 200 nm up to 800 nm with high intensity current (∼56 nA/mm 2 ). We demonstrate a way to identify the quasi-elastic transmission from the total transmission by looking at the characteristic X-rays induced by the transmitted electrons. It shows that the transmitted electrons follow the geometrical transmission with a little deviation. The portion of the nearly elastic transmission is found to be higher for the insulating channels with the diameter of 800 nm. The data obtained allow us to evaluate the possibility of controlling a beam of accelerated electrons using dielectric nanocapillaries.

Passage of a 10-keV electron beam through a bundle of hollow polysulfone fiber with an inner channel diameter of 160 ± 60 μm was studied. The dependence of the electron beam that passed through the channels on the channel tilt angle with respect to the incident beam axis was measured. The fraction of electrons with an energy loss of less than 10% after passing the channels was also estimated.

The spectra of polarization bremsstrahlung (PB) in the X- ray range induced by 7- MeV electrons in a polycrystalline copper target have been measured in the backscattering geometry for various orientations of the target relative to the electron beam. It is shown that the PB backscattering is sensitive to the texture of a target. The possibility of developing a new method based on the measurement of characteristics of the coherent PB component for the diagnostics of polycrystalline materials is consideredyesBelgorod State Universit