The article presents an apparatus for generating an air plasma jet "ALOE". The device differs from known analogues in its compactness achieved due to absence of need to use inert gases (because they are replaced by ambient air) and the ability to determine the exposure dose. In terms of its characteristics this new product corresponds to world standards. There are no domestic analogues of it. Parameters and examples of using this device are presented. It will be in demand for healthcare, veterinary medicine, and cosmetology. The device can be used for disinfection of surfaces, including heat-sensitive ones, such as living tissues, and can serve as a prototype for development of various physiotherapeutic devices.

The kinetic approximation was used to obtain an expression for the bilinear component of the nonlinear charge density, which is used to describe the parametric decay of a microwave with ordinary polarization whose frequency corresponds to the second harmonic of the electron cyclotron resonance. As a result of the decay, an upper hybrid wave and a lower hybrid wave are excited.

The bactericidal components of air plasma jets generated by a direct-current glow discharge and a dielectric barrier discharge were studied using IR and UV absorption spectroscopy. The mole fractions of bactericidal components with an absorption spectrum band structure were determined by selecting a mole fraction value in the calculated spectrum that ensured correlation with the experimental spectrum. The spectra were calculated using the HITRAN spectral database and the Specair 3.0 program. The error in the mole fractions due to violation of the Bouguer–Lambert–Beer law when using absorption coefficients convoluted with the instrument function was determined. The mole fractions of bactericidal components with a continuous absorption spectrum were calculated using the Bouguer–Lambert–Beer law in a standard way. IR and UV absorption spectroscopy were shown to enable determination of the mole fractions for the full set of bactericidal components in air plasma jets of glow and barrier discharges.

The article presents an apparatus for generating an air plasma jet "ALOE". The device differs from known analogues in its compactness achieved due to absence of need to use inert gases (because they are replaced by ambient air) and the ability to determine the exposure dose. In terms of its characteristics this new product corresponds to world standards. There are no domestic analogues of it. Parameters and examples of using this device are presented. It will be in demand for healthcare, veterinary medicine, and cosmetology. The device can be used for disinfection of surfaces, including heat-sensitive ones, such as living tissues, and can serve as a prototype for development of various physiotherapeutic devices.

Using a waveguide microwave filter, the electron density in an argon plasma jet of a dielectric barrier discharge was determined. The dynamic of the electron density behavior during the period of applied voltage with a frequency of about 100 kHz was determined. The 4 maxima of the average concentration, which are about 1013 cm-3, were observed.

The photoluminescence of lithium fluoride nanocrystals and crystals placed on the anode of an atmospheric-pressure glow discharge in helium and exposed to the discharge components was studied. The luminescence spectra showed that color centers with new properties inherent to near-cluster centers were formed in unannealed nanocrystals after exposure to the discharge. However, the conditions necessary for formation of near-cluster centers were eliminated upon annealing of the nanocrystals. These necessary conditions were partially restored when annealed nanocrystals were exposed to the discharge. This opened new possibilities for elucidating the processes and mechanisms of formation of centers with new properties.

Using a waveguide microwave filter, the electron density in an argon plasma jet of a dielectric barrier discharge was determined. The dynamic of the electron density behavior during the period of applied voltage with a frequency of about 100 kHz was determined. The 4 maxima of the average concentration, which are about 10 13 cm -3 , were observed. Keywords: dielectric barrier discharge, waveguide microwave filter, transmission spectrum, electron density, plasma jet.

The component composition of plasma jets generated by a dielectric barrier discharge in helium and air at atmospheric pressure was studied by emission and absorption spectroscopy. The concentration of the main bactericidal component of the air plasma jet (ozone) was determined using both IR and UV absorption spectroscopy to increase the reliability of the measurements. A study of the effects of the plasma jets on Staphylococcus aureus bacteria established that the air jet had a better inactivating effect than the helium jet.

— In this paper, we obtain an expression for the high-frequency quadratic susceptibility of strongly inhomogeneous magnetoactive plasma, which describes the nonlinear coupling of an ordinary wave with longitudinal oscillations.

Изложены результаты теоретического анализа низкопороговой параметрической распадной неустойчивости пучка СВЧ-волны накачки обыкновенной поляризации электронно-циклотронного диапазона частот, приводящей к возбуждению двух косых ленгмюровских волн и развивающейся в цилиндрическом плазменном филаменте.

Получено выражение для высокочастотной квадратичной восприимчивости сильно неоднородной магнитоактивной плазмы, которое описывает нелинейную связь волны обыкновенной поляризации с продольными колебаниями.

The results are presented from the theoretical analysis of the low-threshold parametric decay instability of the pumping microwave beam with the ordinary polarization and the frequency in the electron cyclotron resonance frequency range. This instability develops in the cylindrical plasma filament, which results in the excitation of two oblique Langmuir waves.

The expression is obtained for the high-frequency quadratic susceptibility of the strongly inhomogeneous magnetoactive plasma, which describes the nonlinear coupling between the extraordinary polarized wave and the longitudinal vibrations and makes it possible to explain the strong anomalous absorption of the pump wave observed in the model experiments.

The transmission spectrum switching speed of electromagnetic band gap (EBG) plasma structure formed by pulse discharges at atmospheric pressure was under investigation. The ability to obtain a nanosecond transmission spectrum switching time of plasma EBG structures was demonstrated. The time resolved H. and H. lines profiles were registered. Time behaviour of electron density during the discharge and time evolution of electron concentration were determined. The dependence of current growth rate and fall rate of transmitted microwave power on the applied voltage pulses were determined.

The spatial distribution of gas temperature in air plasma jet of dc glow microdischarge has been determined. The temperature field was measured by a thermocouple probe and compared to schlieren images. The jet can be separated in the radial direction into three characteristic regions with clearly pronounced boundaries. The central region represents a narrow hot zone corresponding to the visible plasma plume, in which the gas temperature varies from 50 to 200°C depending on the air flow rate and distance from the anode. This zone is surrounded by a warm “coat” of ~1-cm diameter and a temperature within 30–50°C. The outer region represented ambient air at room temperature. The zone of temperatures above 50°C did not extend to a distance above 3 cm from the output nozzle of the discharge cell.

Experimental and theoretical studies of the formation of the inactivation components of an air plasma jet generated by a dc atmospheric pressure glow discharge have been carried out. The gas temperature and concentrations of inactivation components were determined by the emission and absorption spectroscopy methods. The mechanisms and zones of formation of the main bactericidal components NO, NO2, and HNO2 of the air plasma jet have been revealed.