ELECTRON BEAM TRANSPORT IN DIELECTRIC TUBES

The present paper outlines the results of experimental studying the transport process of pulse high-current beam of electrons about 200 ns in duration with energy under 200 keV through straight and bent glass tubes. A 17 degrees deviation of the electron beam going through the bent glass tube is demonstrated. Deviating the beam by non uniform electric field which forms inside the glass tube due to electric charge brought to the tube wall by beam electrons is assumed

Obtaining and Photocatalytic Properties of Ni-Doped Nanotubular Titanium Oxide

Photocatalytic properties of Ni-doped nanotubular titanium oxide(Ni-NTO) obtained by anodizing at 30 V anodizing voltage and duration about 40 minutes was studied. Nickel doping of NTO was carried out by immersion in a solution of 0.1 M nickel nitrate for various times, followed by annealing in air.The authors appreciate the support of this work within the government assignment № AAAA-A19-119110190048-7

Cobalt Doped Nanotubular Titanium Oxide

This paper presents a study Co-doped nanotubular titanium oxide (Co-NTO) obtained by anodizing at 30 V 40 min. Cobalt doping of NTO was carried out by immersion in a solution of 0.1 M cobalt nitrate for various times, followed by annealing in air.The authors appreciate the support of this work within the government assignment № AAAA-A19-119110190048-7

CHOICE OF CONDITIONS FOR GAS OUTFLOW IN VACUUM AND CONFIGURATIONS OF A FORMING UNIT FEEDING A WORKING SUBSTANCE INTO THE PLASMA VOLUME

The paper presents formulated requirements to the gas-dynamic device designed for working substance feeding into the ionization zone of plasmas facilities. The role of geometrical factors in formation of a supersonic flow is determined, as well as, the role of gasdynamic factors in attainment of necessary parameters beyond the forming element. The conditions for gas-dynamic flow clustering minimization in the course of outflow in vacuum

Effect of electron collisions with residual neutral gas on characteristic oscillation frequencies in systems of electron flows with a virtual cathode

A system of the hydrodynamic equations describing the electron flows in a diode with a virtual cathode is considered. Collisions are considered by introducing the corresponding braking force into the equations of motion. The stationary states of the electron flows are described. In a linear approximation, formulas are obtained for the frequencies of electron oscillations in a diode with a virtual cathode, considering the effective frequency of electron collisions. The expression for the decrement of oscillations due to the presence of collisions is obtained.Розглянуто систему гідродинамічних рівнянь, що описують потоки електронів у діоді з віртуальним катодом. Зіткнення введено у рівняння руху за допомогою відповідної гальмівної сили. Описано стаціонарні стани потоків електронів. У лінійному наближенні отримано формули для частот коливань електронів у діоді з віртуальним катодом з урахуванням ефективної частоти зіткнень електронів. Отримано вираз для декременту коливань через наявність зіткнень

A novel method of silicon synthesis by CVD

Silicon fibers were synthesized by a novel CVD method including in the interaction of aluminum monofluoride with silicon oxide, the final product containing nanofibers in an amount of 15 wt. %. The possibility of selective reduction of silicon oxide from the chamotte refractory plate was also demonstrated. Si was characterized by SEM and XRD. Thermodynamics and mechanism of silicon fiber formation were also considered. © 2019 Author(s)