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Consider solution of equation, which describe motion of microwave discharge plasma components, and take into account microwave field, magnetic field of permanent magnets and elastic scattering on hydrogen atoms and ions. This solution has a resonant character, moreover, it shows that average energy of electrons in exact resonance on several orders greater than the energy corresponding to the maximum...
The work considers possibilities to employ nanotubular (NT) titanium dioxide layers in order to develop gas sensors. The NT TiO2 layers have been fabricated by electrochemical anodizing of Ti foil with subsequent dissolution of metal layer. The technique to apply TiO2 NT layer over the substrate equipped with strip coplanar electrodes is developed. It has been found that the TiO2 NTs exhibit a considerable...
The practical part of the work on the modernization of the industrial plant of high-frequency sputtering. The author's task was put to create a universal test bench with the possibility of a wide variation of sprayed materials. The versatility of the installation is the possibility of growing films of metals and dielectrics using the same sputtering target. The design of the experimental setup provides...
The basic principles to be met by structural and functional diagram of the device of detecting of high-voltage overhead power lines with low-altitude helicopter flight. High-voltage lines are a common cause of helicopter accidents. A possible structural and functional diagram of the device, as well as the formula to calculate the required sensitivity of the sensors of electric and magnetic fields...
The paper describes an approach to designing a fluorescent multiprobe array to detect the presence of heavy metals (HM) in the solutions. As a result of the selection of sensors the fluorescent probes — xanthene dyes, acridine and thiazine series have been selected to collect the array. Variations of the maximum values of probe fluorescence intensity have been employed as the analytical parameters...
The article describes the principle of the simulation of microwave drying of dielectrics by the method of equivalent circuits. The mathematical model of the kinetics of the energy and mass transfer in the microwave drying of dielectrics was described. The equivalent circuits simulating the heat and mass transfer was shows. The mathematical simulation results of microwave drying of wood in periodic...
Proposal to consider various options for the heat treatment of dielectric objects in pushing microwave thermal installation on the basis of the camera with a traveling wave. The block diagram of microwave systems and kinematics pusher installations the camera with a traveling wave, the calculated ratio and the detailed sequence of calculation of the matching profile unregulated camera waveguide traveling...
Article presents of the results the calculation of the first order derivative of the magnetic induction in the ring magnet with a trapezoidal cross-section. Shows graphs of the magnetic field and the derivative of the magnetic field from the magnet thickness for three different magnets. Give a formula for calculating the magnetic field sensitivity from the change in the thickness of the magnetic field...
Magnetron generators with different systems of magnetic field creation are used during industrial microwave devices construction. Technical and economic parameters of the generators are largely depended by the power supply source characteristics. Therefore, during the development stage of the power supply source it needs to have a model for studying of electromagnetic processes in the power supply...
Energy efficiency — a direction vector in the design in order to achieve technological effect. In turn, economic efficiency determines whether the manufacture, sale and installation service. The relation between energy efficiency and cost-effectiveness on the example of a conveyor microwave electrothermal installations. The block diagram of the installation is described cell installation base and...
The article recommended the method of protection of power transformer from the influence of geomagnetically induced currents, by launching the resistive grounding mode at the period of geomagnetic disturbances and reversion to the solid-grounded mode on completing of geomagnetic disturbances. The article shows that for the identification of single-side saturation of the magnetic system of power transformer...
The article recommends the principle of commutative programming scan of the comparison signal. This principle allows linearization of transient characteristics «regulating pilot — output voltage» of pulse-width convertors. In the article obtained the expressions for determining the sequence of discrete samples, forming a functional scan reference signal. The functional scan is necessary for the linearization...
Stationary magnetic field which necessary to electron cyclotron resonance formed by permanent magnets from alloy NeFeB. Computer simulation by code ANSYS allows us to find such configuration of permanent magnets that gives magnetic field strength equal 875 mT at input and output hole. Regulation of magnetic field distribution provides by special iron bars. Also, computer simulation shows that even...
The paper considers the issues of burning metal jumpers on the surface of a semiconductor by current pulses of different shapes. Discovered that the passage of single rectangular current pulse with a duration of no more than 60 μs and an energy of 90 mJ observed the predominance of the processes of melting metal film over the contact melting at the interface. Current pulses of non-rectangular form...
In this article the questions of increase of reliability and durability, high-power pulsed microwave devices M-type. Analysis of the work metal-alloy cathode in the device showed its lack of resistance to a pulsed thermal loads caused by back electron bombardment. The developed design of metal-ceramic cathode unit with water cooling, able to withstand a pulse thermal load and divert from the cathode...
The possibilities of modifying the IR spectra of porous silicon under irradiation by low doses of gamma — quanta of radioisotope source of 226Ra and bremsstrahlung radiation are investigated.
The article describes the results of a natural experiment to verify the mathematical model for calculating the ring magnet with a trapezoidal cross-section. Shows the graphical model of calculated the experimental magnet, as well as its real counterpart, with the measurement of the magnetic field in the center of which are compared of results of calculation of the mathematical model. Displays summary...
When choosing technological modes of diffusion welding of iron with metals it is necessary to consider that during heating of ferrite materials in a vacuum there is a possibility of changes in the structure and the main electromagnetic parameters of the ferrites. Given the large diversity of physical and chemical properties of the ferrite materials, it is necessary to assess the impact of vacuum-thermal...
Various technologies of all-optical switches are considered. In the course of the analysis it is concluded that all the existing technologies provide the highest performance electro-optic technology. New optical switching cell is proposed. It is different from the known cells that the selection of the desired output takes place without the involvement of an external control device. That why the switching...
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