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Article
Pulsed CO2 Laser Pumped by a Longitudinal Discharge in an Alternating Magnetic Field
An original technique is suggested for pum** a pulsed CO2 laser by a longitudinal discharge in an alternating magnetic field. A small CO2 laser with active medium ∼200 mm long, pulse energy of ∼30 mJ, and effic...
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Article
Interaction of Nitrogen Dioxide by 222 nm Laser
The process of broadband KrCl laser λrad = 222 nm interaction with nitrogen dioxide in the atmosphere is considered. During the laser pulse, photofragmentation of NO2 occurs, followed by resonant excitation of se...
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Article
Technology for Determining the Operational Settings of Remote Protection of Electric Transmission Lines Using Mathematical Models
The correct functioning of relay protection (RP) devices largely determines the reliability and stability of the operation of electric power systems (EPS). The key aspect that in turn determines the behavior o...
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Article
Improving the Stability of the Optical System of a Laser Source Based on a Position-Sensitive Detector
Results of numerical and experimental studies on monitoring and control for optical elements of an electric discharge KrF laser by the method of density-based spatial clustering of applications with noises (DB...
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Article
Validation of Numerical Calculations of Electromechanical Transient Processes When Assessing the Stability of Electric Power Systems Using Renewable Energy Sources
The widespread introduction of renewable energy sources (RES) into modern electric power systems (EPS) significantly changes their dynamic properties. EPS stability issues arise due to the properties of non-sy...
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Article
Three-Probe Microwave Interferometry for Measuring Displacement of Mechanical Objects with Account for Antenna Reflectivity
This paper addresses the problem of displacement measurement by a three-probe implementation of microwave interferometry in cases where the reflection coefficients of the object under measurement (target) and ...
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Article
Discharge KrF Laser with a High Specific Energy of Radiation
We report the results of experimental and numerical investigations of a discharge KrF laser with specific pump power of 3.5 and 7 MW/cm3; generation is obtained with specific radiation pulse energy of about 6 and...
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Article
Verification of Dynamic Stability Calculations of Energy Districts with Distributed Generating Facilities
One of the global energy trends is the introduction of distributed generating facilities (distributed generation, DG). Therefore, the ongoing transformation of electric power systems (EPS) significantly change...
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Article
Influence of Discharge Plasma Inhomogeneities on the Characteristics of KrF-Laser Radiation
Results of studies of the electric-discharge KrF laser with a specific pulse energy of ~6 J/L and an internal energy efficiency of more than 4% are presented. The formation of instabilities of various types in...
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Article
Synthesis of 3-Chloro-3-(trimethylsilyl)prop-2-enoic Acid Amides and Hydrazides from 3-(Trimethylsilyl)propynoic Acid
A number of previously unknown and difficultly accessible polyfunctional β-chloro-β-(trimethylsilyl)prop-2-enoic acid amides and hydrazides have been synthesized by amination of 3-chloro-3-(trimethy...
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Article
Photometric Studies of the Intermediate Polar DO Dra in 2008 and 2019
An analysis is presented of photometric observations of the intermediate polar DO Dra obtained during an epoch of significant reduction in its outburst activity for different average brightnesses of the system...
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Article
Determination of Biconical Cavity Eigenfrequencies Using Method of Partial Intersecting Regions and Approximation by Rational Fractions
The paper considers the problem of determining the eigenfrequencies of biconical cavity making it possible to simplify the eigenfrequency-based design of devices. We used the solving of the excitation problem ...
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Article
Regio- and stereoselective reaction of sodium benzeneselenolate with 3-(trimethylsilyl)prop-2-ynamides
Sodium benzeneselenolate adds regio- and stereoselectively to 3-(trimethylsilyl)prop-2-yn-amides to give (Z)-3-(phenylselanyl)prop-2-enamides.
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Article
Regio- and Stereoselective Addition of Selenium Dichloride to Alkyl Propiolates
The reaction of selenium dichloride with methyl and ethyl propiolates leads to formation of anti-Markovnikov adducts. The regio- and stereoselective synthesis of hitherto unknown bis[(E)-2-chloro-1-(alkoxycarbony...
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Article
Investigation of Processes in the Measuring Part of Digital Devices of Relay Protection in the MATLAB Software Package
It was revealed that one of the main reasons for erroneous operation of relay protection devices (RPs) is it being set in a way that does not correspond with the real operating conditions, which in turn is det...
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Article
Radiation Intensity Profiles at Different Stages of the Formation of Apokamp Discharge
Experimental studies of the heat release processes in the apokamp discharge were carried out via the plotting of intensity charts. The procedure was verified with measurement techniques similar to those used i...
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Article
Numerical Method of Cavity Adjustment by the Output Beam Image
Results of numerical and experimental studies of the control of optical elements of a KrF laser cavity by use of the image processing method are presented. Different methods of beam image binarization for dete...
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Article
Dipropadienyl telluride
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Article
Increasing the Sensitivity of Lidar Systems Based on the LF/LIF Method
The results of studies on the development of laser sources in the UV and IR spectral ranges for the lidar systems operating on the basis of a method of laser fragmentation with subsequent laser-induced fluores...
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Article
Simple technique for biconical cavity eigenfrequency determination
A number of features of biconical cavities make them attractive for various applications. Expressions for the calculation of the eigenfrequencies of a biconical cavity with large cone angles can be derived usi...
