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Forced Longitudinal Oscillations of Gas and Aerosol in an Open Tube with a Cross-Sectional Jump 带有横截面跃迁的开口管中气体和气溶胶的强迫纵向振荡
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050087
D. A. Gubaidullin, L. R. Shaidullin, S. A. Fadeev
{"title":"Forced Longitudinal Oscillations of Gas and Aerosol in an Open Tube with a Cross-Sectional Jump","authors":"D. A. Gubaidullin,&nbsp;L. R. Shaidullin,&nbsp;S. A. Fadeev","doi":"10.1134/S1028335823050087","DOIUrl":"10.1134/S1028335823050087","url":null,"abstract":"<p>In this paper, we study experimentally the forced longitudinal oscillations of gas and aerosol in an open tube with a cross-sectional jump. An intensification of gas oscillations in a tube with a cross-sectional jump in comparison with a homogeneous tube, while the pressure waveform remains close to harmonic and continuous, is observed. A nonmonotonic dependence of the aerosol deposition time on the oscillation frequency with a minimal value at the resonant frequency was discovered.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 6","pages":"195 - 198"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139648397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Multistability in a Chiral Semiconductor Microcavity 手性半导体微腔的多稳定性
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050051
O. A. Dmitrieva, N. A. Gippius,  S. G. Tikhodeev
{"title":"Multistability in a Chiral Semiconductor Microcavity","authors":"O. A. Dmitrieva,&nbsp;N. A. Gippius,&nbsp; S. G. Tikhodeev","doi":"10.1134/S1028335823050051","DOIUrl":"10.1134/S1028335823050051","url":null,"abstract":"<p>The features of the bi- and multistability effects in the semiconductor Bragg microcavity with a chiral photonic crystal slab on the upper mirror are investigated theoretically. It is shown that the response of such a chiral structure under a linearly polarized coherent resonant pump demonstrates sharp multistable transitions with abrupt jumps of the exciton intensity and degree of circular polarization. It is shown that the thresholds of bistable transitions in the system with a different sense of circular polarization differ slightly; i.e., in the case of a nonoptimized structure, we can expect to obtain even a larger amplitude of jumps of the degree of circular polarization of the excitonic response due to the multistability than in a specially optimized chiral structure with a high degree of circular polarization at a low pump intensity.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 5","pages":"144 - 148"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139578639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of the Electro-Optical Coefficients of Barium Titanate 测定钛酸钡的电光系数
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050142
V. B. Shirokov, P. E. Timoshenko,  V. V. Kalinchuk
{"title":"Determination of the Electro-Optical Coefficients of Barium Titanate","authors":"V. B. Shirokov,&nbsp;P. E. Timoshenko,&nbsp; V. V. Kalinchuk","doi":"10.1134/S1028335823050142","DOIUrl":"10.1134/S1028335823050142","url":null,"abstract":"<p>Within the framework of the theory of thermodynamics, a method for determining the electro-optical coefficients is proposed. It is shown that for all ferroelectrics the symmetry of which admits a diagonal susceptibility, the ratio of some electro-optical coefficients is expressed in terms of the ratio of susceptibilities. For barium titanate, the dependence of the electrooptical coefficients on the electric field has been revealed and studied. It is shown that large values of the electro-optical coefficients of barium titanate are associated with a nonlinear dependence of the dielectric susceptibility on the electric field.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 5","pages":"159 - 163"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139578605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Turbulent Boundary Layer on a Permeable Plate in a Supersonic Flow with a Positive Pressure Gradient under Foreign Gas Injection 外来气体注入下具有正压梯度的超音速流中透气板上的湍流边界层
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050129
A. I. Leontiev, V. G. Lushchik, M. S. Makarova
{"title":"A Turbulent Boundary Layer on a Permeable Plate in a Supersonic Flow with a Positive Pressure Gradient under Foreign Gas Injection","authors":"A. I. Leontiev,&nbsp;V. G. Lushchik,&nbsp;M. S. Makarova","doi":"10.1134/S1028335823050129","DOIUrl":"10.1134/S1028335823050129","url":null,"abstract":"<p>A numerical simulation of a turbulent boundary layer on a permeable plate with helium injection into a supersonic xenon flow in the presence of a positive longitudinal pressure gradient has been carried out. The injection regimes in which the temperature of the injected gas is lower than the temperature of the adiabatic impermeable wall and the stagnation temperature of the oncoming flow are considered. The existence of a minimum temperature of the permeable wall is confirmed, at which the wall temperature is lower than the temperature of the injected gas, while there are two sections along the length of the permeable plate in which the adiabatic conditions are satisfied. The results of calculations of a supersonic flow with a longitudinal pressure gradient differ significantly from the results obtained for a gradientless flow around a plate, for both subcritical and critical injection.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 6","pages":"199 - 203"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139648332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nonlinear Phenomena During the Propagation of Powerful Nanosecond Electromagnetic Pulses in Large-Scale Strip Lines in Gas at Low Pressure 强力纳秒电磁脉冲在低压气体中的大规模带状线传播过程中的非线性现象
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050105
S. V. Korobkov, M. E. Gushchin, A. V. Strikovskiy, I. M. Vershinin, I. Yu. Zudin, K. N. Loskutov, A. S. Nikolenko, A. V. Palitsin, A. V. Gromov, M. B. Goykhman,  E. A. Mareev
{"title":"Nonlinear Phenomena During the Propagation of Powerful Nanosecond Electromagnetic Pulses in Large-Scale Strip Lines in Gas at Low Pressure","authors":"S. V. Korobkov,&nbsp;M. E. Gushchin,&nbsp;A. V. Strikovskiy,&nbsp;I. M. Vershinin,&nbsp;I. Yu. Zudin,&nbsp;K. N. Loskutov,&nbsp;A. S. Nikolenko,&nbsp;A. V. Palitsin,&nbsp;A. V. Gromov,&nbsp;M. B. Goykhman,&nbsp; E. A. Mareev","doi":"10.1134/S1028335823050105","DOIUrl":"10.1134/S1028335823050105","url":null,"abstract":"<p>Experiments on the propagation of powerful high-voltage pulses with a duration on the order of a nanosecond or less in large-scale transmission lines in an atmosphere of various gases make it possible to solve a wide range of fundamental and applied problems, from modeling the passage of electromagnetic pulses (EMPs) through the atmosphere to estimating the electrical strength of elements of pulsed high-voltage gas-filled systems. At the Institute of Applied Physics, Russian Academy of Sciences, experiments with strip lines with a length of up to 5 m were conducted using the Krot and Sprait setups. When EMP propagates with an electric field strength level of up to 100 kV/m in a rarefied gas, effects such as the formation of inhomogeneous and significantly nonstationary glow structures, nonlinear absorption, and dispersive transformation of the shape of high-power pulses caused by gas ionization in the EMP field are studied.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 6","pages":"181 - 185"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139648408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic Model of the Separation of Large-Sized Elastic Structures 大型弹性结构分离的动态模型
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050026
V. N. Bakulin, S. V. Borzykh
{"title":"Dynamic Model of the Separation of Large-Sized Elastic Structures","authors":"V. N. Bakulin,&nbsp;S. V. Borzykh","doi":"10.1134/S1028335823050026","DOIUrl":"10.1134/S1028335823050026","url":null,"abstract":"<p>An approach to the development of a dynamic model of one of the key stages of the flight of rocket and space systems is presented: the separation of large-sized structures. The importance of taking into account the elastic properties of separated objects is justified. Based on the assumptions typical of the process under study (small angular velocities of relative motion during separation compared to the lower frequencies of the separated objects), the partial differential equations of elastic vibrations are replaced with a system of ordinary differential equations describing the excitation of a limited number of lower order modes, which made it possible to formulate an efficient approach that allows a clear mechanical interpretation: the general motion during separation is decomposed into a transport motion (rotational and translational as a whole) and small elastic relative vibrations, described in a universal modal formulation. The process of separation of an aerospace aircraft and a launch vehicle is analyzed. The effect of loss of the relative separation velocity due to elastic vibrations is revealed, and a recommendation for the rational arrangement of separation tools is formulated.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 6","pages":"190 - 194"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139647835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Probabilistic Model of the Scattering of Ultrashort Pulses on a Free Electron 自由电子上超短脉冲散射的概率模型
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S102833582305004X
A. S. Bugaev, E. S. Khramov, V. A. Astapenko
{"title":"Probabilistic Model of the Scattering of Ultrashort Pulses on a Free Electron","authors":"A. S. Bugaev,&nbsp;E. S. Khramov,&nbsp;V. A. Astapenko","doi":"10.1134/S102833582305004X","DOIUrl":"10.1134/S102833582305004X","url":null,"abstract":"<p>This study is devoted to generalization of the traditional approach for the description of photon scattering on free electrons in the case of ultrashort laser pulses. In the framework of the second order of quantum mechanical perturbation theory with the use of the Klein–Nishina formula, we derived an expression for the total scattering probability during the whole time of the pulse action that is applicable in the relativistic limit. The redshift of scattered pulse spectra under an increase in the scattering angle in the relativistic case was studied. The trends of the total scattering probability on the duration of ultrashort laser pulses were categorized.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 6","pages":"177 - 180"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139647840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Impact of the Wavefront on a Nonlinear Wave in a Dissipative Medium 波前对耗散介质中非线性波的影响
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050038
V. A. Bazylenko,  O. V. Rudenko
{"title":"Impact of the Wavefront on a Nonlinear Wave in a Dissipative Medium","authors":"V. A. Bazylenko,&nbsp; O. V. Rudenko","doi":"10.1134/S1028335823050038","DOIUrl":"10.1134/S1028335823050038","url":null,"abstract":"<p>A method for generating solutions of the Burgers equation, which describe the interaction of waves in a nonlinear dissipative medium with a linearly growing wavefront, is proposed. The exact solutions describing these interactions and symmetry properties of the equation are used. It is shown that the rising wavefront is able to compete with the dissipation and compress the signal in time. On the contrary, the wavefront with the decreasing steepness “stretches” the signal.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 5","pages":"141 - 143"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139578609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Structure and Mechanical Characteristics of Composites with High Damping Properties 高阻尼特性复合材料的结构和机械特性
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050130
E. V. Lomakin, S. A. Lurie, L. N. Rabinskiy
{"title":"Structure and Mechanical Characteristics of Composites with High Damping Properties","authors":"E. V. Lomakin,&nbsp;S. A. Lurie,&nbsp;L. N. Rabinskiy","doi":"10.1134/S1028335823050130","DOIUrl":"10.1134/S1028335823050130","url":null,"abstract":"<p>The damping characteristics of hybrid composites reinforced with spherical and fibrous elastic inclusions with viscoelastic coatings are studied. It is shown that, in the composites with the particle morphology, a significant increase in the dissipation loss can be implemented and the effective loss of a composite can exceed the dissipation loss of viscoelastic coatings by a factor of more than 20. Analytical estimates of the optimum parameters of hybrid composites are proposed. The effect of possible imperfections of the composite structure on the effective dissipation properties of the composites is analyzed.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 5","pages":"171 - 176"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139578723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synchronized Active Antenna Arrays for Studying the Passage of Ultra-Wideband Signals in the Atmosphere and Ionosphere 用于研究大气层和电离层中超宽带信号传递的同步有源天线阵列
IF 0.6 4区 物理与天体物理
Doklady Physics Pub Date : 2024-01-29 DOI: 10.1134/S1028335823050117
E. F. Lebedev, V. E. Ostashev, A. V. Ulyanov, V. M. Fedorov, M. A. Shurupov
{"title":"Synchronized Active Antenna Arrays for Studying the Passage of Ultra-Wideband Signals in the Atmosphere and Ionosphere","authors":"E. F. Lebedev,&nbsp;V. E. Ostashev,&nbsp;A. V. Ulyanov,&nbsp;V. M. Fedorov,&nbsp;M. A. Shurupov","doi":"10.1134/S1028335823050117","DOIUrl":"10.1134/S1028335823050117","url":null,"abstract":"<p>Active synchronized antenna arrays generating ultra-wideband radiation with an electric field strength of about 1 V/m at a distance of several hundred kilometers have been studied. They are designed to study the passage of ultra-wideband signals in the surface layer of the atmosphere and through the ionosphere. Synchronous antenna arrays with four and nine radiating modules have been created. Their radiation has a symmetrical radiation pattern along the x and y axes with a pulse duration at half-height of about 100 ps. They have a pulse energy potential (<i>E</i> × <i>R</i>) of about 60 and 150 kV, with a gross weight of 50 and 100 kg, respectively. Such characteristics allow these arrays to be placed on air carriers. The option of using air balloons under irradiation in the surface layer of the atmosphere and the option of placing meteorological rockets under irradiation from a height of 300 km to the Earth’s surface is considered.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 5","pages":"155 - 158"},"PeriodicalIF":0.6,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139578635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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