Cerium-doped mesoporous BaTiO3/TiO2 nanocomposites: structural,optical and photocatalytic properties

Research on Chemical Intermediates - Nanoscale composite materials based on cerium, barium titanate and titanium dioxide were synthesized by thermal hydrolysis. The obtained individual TiO2, BaTiO3...     

Transverse dynamics of high-density relativistic electron beams propagating in plasma in the direction of the external magnetic field

Based on analysis of the effective potential, a possibility is found to realize a single type of radial evolution of high-density relativistic electron beams. This operating mode is characterized by periodic oscillations of the beam radius within a certain range. Conditions are found for radial beam stabilization under this beam transport regime.     

Simulation of the dynamics of resistive hose instability of a relativistic electron beam propagating in a resistive plasma channel with arbitrary conductivity

The spatial dynamics of the resistive hose instability of a relativistic electron beam has been studied for the case when the charge neutralization time is much longer, on the order of, or much shorter than the current compensation time. It has been found that the growth of this instability has the highest increment when the charge neutralization time is on the order of skin time.

     

Moderately relativistic high-harmonic gyrotrons formillimeter/submillimeter wavelength band

A large orbit gyrotron with a 300 keV, 30 A, 20 ns electron beam has provided selective generation with radiation power from 1.5 MW at fundamental (wavelength of 14 mm) to 100 kW at the fifth cyclotron harmonic (wavelength of 4 mm). The next experiment with a unique electron beam (250 keV, 18 A, 10 μs, 0.6 mm in diameter) is in progress     

Numerical-Analytical Implementation of Galerkin's Method for Analysis of Box Horn Antennas

We present a rigorous method for the electrodynamic analysis of box horn antennas. The method is based on the Green's dyadic technique and Galerkin's method with allowance for the edge singularity of the field. The results obtained are compared with the experimental and theoretical data of other works. The radiation patterns of box horns are discussed.     

Comparing the integral characteristics of finite arrays of parallel-plate waveguides with dielectric plugs under E and H excitation

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 33, No. 1, pp. 98–101, January, 1990.