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Specific Features of Pulsed Cathodoluminescence under Excitation by Nanosecond and Subnanosecond Electron Beams 纳秒和亚纳秒电子束激发下脉冲阴极发光的特性
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-11-02 DOI: 10.1134/S1028335823020064
M. I. Yalandin, V. I. Solomonov, A. V. Spirina, S. A. Shunailov, K. A. Sharypov, A. S. Makarova, A. I. Lipchak
{"title":"Specific Features of Pulsed Cathodoluminescence under Excitation by Nanosecond and Subnanosecond Electron Beams","authors":"M. I. Yalandin,&nbsp;V. I. Solomonov,&nbsp;A. V. Spirina,&nbsp;S. A. Shunailov,&nbsp;K. A. Sharypov,&nbsp;A. S. Makarova,&nbsp;A. I. Lipchak","doi":"10.1134/S1028335823020064","DOIUrl":"10.1134/S1028335823020064","url":null,"abstract":"<p>The results of comparative investigations of the parameters of pulsed cathodoluminescence of crystals and ceramics excited by runaway electron beams with a duration of 10–12 ps and by electron beams with a duration of 2 ns generated in a vacuum diode are presented. It is shown that the luminescence spectrum and the decay kinetics of the bands coincide in both cases. When excited by a beam of runaway electrons, a lower luminescence intensity is observed. In certain cases, a delay in the appearance of luminescence relative to the onset of the electron-beam action is found. The mechanism for the appearance of a delay upon excitation by the beam of runaway electrons is associated with the process of luminescence rise.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 2","pages":"50 - 55"},"PeriodicalIF":0.8,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908899","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
Relaxation Rotation during Martensitic Transformation and Scattering of the Martensite Texture 马氏体相变过程中的弛豫旋转和马氏体织构的散射
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-11-02 DOI: 10.1134/S1028335823020027
V. M. Gundyrev, V. I. Zel’dovich,  V. M. Schastlivtsev
{"title":"Relaxation Rotation during Martensitic Transformation and Scattering of the Martensite Texture","authors":"V. M. Gundyrev,&nbsp;V. I. Zel’dovich,&nbsp; V. M. Schastlivtsev","doi":"10.1134/S1028335823020027","DOIUrl":"10.1134/S1028335823020027","url":null,"abstract":"<div><p>In the crystallographic theory of martensitic transformation, a new characteristic of martensitic transformation appears—a relaxation rotation, which was not in the generally accepted phenomenological theory of martensitic transformations. The relaxation rotation is necessary to obtain an invariant plane. The calculated angle of relaxation rotation for iron alloys with nonthermoelastic martensite is 1.75–1.85 degrees; for thermoelastic Geisler alloys with multilayer martensite, it is 0.19–0.36 degrees. The relaxation rotation leads to scattering of the texture of martensite. The scattering angles of single X-ray reflections of martensite in different alloys were measured, and it was found that the scattering angle corresponds to the angle of relaxation rotation. This result shows that the crystallographic theory of martensitic transformation describes the real mechanism of martensitic transformation.</p></div>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 2","pages":"46 - 49"},"PeriodicalIF":0.8,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908897","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
Development Trends in Plasma Aerodynamics 等离子体空气动力学的发展趋势
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-11-02 DOI: 10.1134/S1028335823010019
B. S. Aleshin,  V. Yu. Khomich,  S. L. Chernyshev
{"title":"Development Trends in Plasma Aerodynamics","authors":"B. S. Aleshin,&nbsp; V. Yu. Khomich,&nbsp; S. L. Chernyshev","doi":"10.1134/S1028335823010019","DOIUrl":"10.1134/S1028335823010019","url":null,"abstract":"<p>The most promising areas of research in the field of plasma aerodynamics are proposed. On the basis of the presented experimental data obtained recently, the possibilities of using the volumetric force effect on the gas flow in aerodynamic applications, which is realized with the help of near-surface electric discharges, are considered. One of these applications is to increase the length of the laminar section of the boundary layer on the swept wing in order to reduce the aerodynamic drag of the aircraft in the cruise flight mode. The second direction is associated with the control of the three-dimensional separation of the boundary layer on the elements of the mechanization of the swept wing in the take-off and landing modes. The third direction is the reduction of surface friction in the turbulent boundary layer, which is realized on most of the surface of modern near- and supersonic aircraft. The proposed studies are not only of applied, but also of fundamental importance due to the physical complexity of the studied phenomena.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 1","pages":"1 - 5"},"PeriodicalIF":0.8,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908758","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: 1
Assessment of Temperature Stresses in the Lithosphere of the Early Moon 月球早期岩石圈温度应力的评估
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-11-02 DOI: 10.1134/S1028335822120060
S. A. Voropaev, A. P. Krivenko
{"title":"Assessment of Temperature Stresses in the Lithosphere of the Early Moon","authors":"S. A. Voropaev,&nbsp;A. P. Krivenko","doi":"10.1134/S1028335822120060","DOIUrl":"10.1134/S1028335822120060","url":null,"abstract":"<p>In the early stages of the Moon’s formation, its growing lithosphere experienced complex time-varying temperature and gravitational stresses. Despite the subsequent intense impact transformation of the surface, during the gravimetric study of the GRAIL space mission, the presence of ancient deep intrusions was detected. The analysis of linear gravitational anomalies shows the expansion of the outer rigid layer of the Moon at a certain early stage of its evolution due to the excess of temperature stresses over gravitational compression. Obtaining the dependence of the time interval of the lithosphere expansion on a number of dimensionless thermal conductivity parameters will make it possible to refine the existing models of the thermal and geochemical evolution of the early Moon.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 1","pages":"24 - 29"},"PeriodicalIF":0.8,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908754","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
Comparative Analysis of the Darcy and Brinkman Approximations for the Transition to Instability in a Porous Medium 多孔介质中向不稳定过渡的Darcy和Brinkman近似的比较分析
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-11-02 DOI: 10.1134/S1028335823010056
A. T. Il’ichev, G. G. Tsypkin
{"title":"Comparative Analysis of the Darcy and Brinkman Approximations for the Transition to Instability in a Porous Medium","authors":"A. T. Il’ichev,&nbsp;G. G. Tsypkin","doi":"10.1134/S1028335823010056","DOIUrl":"10.1134/S1028335823010056","url":null,"abstract":"<p>The stability of the evaporation front in a porous medium has been studied. The flow is described using the generalized Brinkman equation. The data obtained are compared with the results found within the Darcy approximation. It is shown that the use of the Brinkman approximation removes the unboundedness of the perturbation growth rate on small scales arising in the case of Darcy’s law. The interface becomes more stable; in the case of instability, the most unstable mode corresponds to a finite value of the wave number.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"68 1","pages":"9 - 13"},"PeriodicalIF":0.8,"publicationDate":"2023-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71908759","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
The Problem of Derivation of the Magnus Formula 马格努斯公式的推导问题
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110040
S. O. Gladkov
{"title":"The Problem of Derivation of the Magnus Formula","authors":"S. O. Gladkov","doi":"10.1134/S1028335822110040","DOIUrl":"10.1134/S1028335822110040","url":null,"abstract":"<p>On the basis of the condition of the flow potentiality of the hydrodynamic stream flowing around a stationary rotating ball, a detailed analytical derivation of the formula for the Magnus force describing the nondissipative lateral impact from the direction of the progressively moving viscous flow is given for the first time.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"451 - 453"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4945054","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
On a Hyperbolic Equation for the Rayleigh Wave 关于瑞利波的双曲方程
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100056
J. D. Kaplunov, D. A. Prikazchikov, R. F. Sabirova
{"title":"On a Hyperbolic Equation for the Rayleigh Wave","authors":"J. D. Kaplunov,&nbsp;D. A. Prikazchikov,&nbsp;R. F. Sabirova","doi":"10.1134/S1028335822100056","DOIUrl":"10.1134/S1028335822100056","url":null,"abstract":"<p>A 1D hyperbolic equation is derived for the Rayleigh wave induced by prescribed surface loading. The wave operator turns out to be independent of the vertical coordinate, which appears only in the right hand side of the equation as a parameter within the pseudo-differential operator acting on the given load. It is shown that in case of the classical 2D Lamb problem this operator causes smoothening of the surface concentrated impulse as the depth increases. The suggested formulation enables revealing of the peculiarities of surface elastic wave.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 10","pages":"424 - 427"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289391","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: 1
A Generalized Approach to Interference Invariant of the Hydroacoustic Field in Deep and Shallow Seas 深浅海水声场干涉不变性的广义方法
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822100019
S. P. Aksenov, G. N. Kuznetsov
{"title":"A Generalized Approach to Interference Invariant of the Hydroacoustic Field in Deep and Shallow Seas","authors":"S. P. Aksenov,&nbsp;G. N. Kuznetsov","doi":"10.1134/S1028335822100019","DOIUrl":"10.1134/S1028335822100019","url":null,"abstract":"<p>A new definition of the hydroacoustic field invariant based on a stable estimate of the invariance of orthogonal projections of the sound-pressure-phase gradients on the “distance–frequency” plane is introduced. Such a definition generalizes the concept of an invariant to all existing zones of shallow and deep seas including the near and far zones of illumination of the deep sea in which it is impossible to estimate and apply the Chuprov interference invariant. In the zone of existence of the Chuprov invariant, its values almost coincide with the values of the new invariant.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"442 - 446"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5289405","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
Comparison of the Intensities of Chemical and Physical Processes Occurring during Laser-Induced Breakdown of Colloidal Solutions of Tb Nanoparticles with Different Oxidation States 不同氧化态Tb纳米粒子胶体溶液激光击穿过程中化学和物理过程强度的比较
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110076
A. V. Simakin, I. V. Baymler, V. V. Smirnova, M. E. Astashev, V. V. Voronov,  A. S. Dorokhov, S. V. Gudkov
{"title":"Comparison of the Intensities of Chemical and Physical Processes Occurring during Laser-Induced Breakdown of Colloidal Solutions of Tb Nanoparticles with Different Oxidation States","authors":"A. V. Simakin,&nbsp;I. V. Baymler,&nbsp;V. V. Smirnova,&nbsp;M. E. Astashev,&nbsp;V. V. Voronov,&nbsp; A. S. Dorokhov,&nbsp;S. V. Gudkov","doi":"10.1134/S1028335822110076","DOIUrl":"10.1134/S1028335822110076","url":null,"abstract":"<p>A technique for synthesizing Tb nanoparticles using laser ablation in various liquid media (MQ water, ethanol, isopropyl alcohol, and isobutanol) is considered with the aim of preparing colloidal solutions of Tb nanoparticles, containing different amounts of oxidized particles. The synthesis of nanoparticles in isobutyl alcohol exhibits the lowest percentage of oxidized particles relative to the total number of particles in the resulting colloid, with a final ratio of oxidized Tb<sub>2</sub>O<sub>3</sub> particles to all particles close to 5%. The influence of oxidized particles on the intensity of physicochemical processes (formation of plasma, shock waves, acoustic signals, and chemical products as a result of dissociation of water molecules) occurring during optical breakdown of colloidal solutions, has been investigated. The general tendency of the influence of oxidized particles consists in an increase in the intensity of the aforementioned characteristics upon laser breakdown with an increase in the Tb<sub>2</sub>O<sub>3</sub> fraction with respect to the total number of particles in the colloid. The observed effect is presumably related to the high aggregability of Tb<sub>2</sub>O<sub>3</sub> particles, while the absorption coefficient of particles is of minor importance.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"465 - 471"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4940979","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: 1
Characteristics of Solar Cells Based on Polycrystalline Silicon 多晶硅太阳能电池的特性研究
IF 0.8 4区 物理与天体物理
Doklady Physics Pub Date : 2023-03-24 DOI: 10.1134/S1028335822110015
B. M. Abdurakhmanov, M. M. Adilov,  M. Kh. Ashurov, Kh. B. Ashurov
{"title":"Characteristics of Solar Cells Based on Polycrystalline Silicon","authors":"B. M. Abdurakhmanov,&nbsp;M. M. Adilov,&nbsp; M. Kh. Ashurov,&nbsp;Kh. B. Ashurov","doi":"10.1134/S1028335822110015","DOIUrl":"10.1134/S1028335822110015","url":null,"abstract":"<p>The results of comparison of the efficiency and radiation resistance of solar cells made of single-crystal silicon and polycrystalline silicon (multisilicon) are presented. It is shown that film solar cells synthesized with using the chloride process when using multisilicon as a substrate material are not inferior in their characteristics to solar cells made of single-crystal silicon.</p>","PeriodicalId":533,"journal":{"name":"Doklady Physics","volume":"67 11","pages":"439 - 441"},"PeriodicalIF":0.8,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4941319","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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