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Bulletin of the Russian Academy of Sciences: Physics最新文献

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Laser-Driven Formation of Relativistic Electron Mirrors and Generation of Incoherent X-Rays 激光驱动的相对论性电子镜的形成和非相干x射线的产生
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709115
V. V. Kulagin, V. N. Kornienko, V. A. Cherepenin
{"title":"Laser-Driven Formation of Relativistic Electron Mirrors and Generation of Incoherent X-Rays","authors":"V. V. Kulagin,&nbsp;V. N. Kornienko,&nbsp;V. A. Cherepenin","doi":"10.1134/S1062873824709115","DOIUrl":"10.1134/S1062873824709115","url":null,"abstract":"<p>2D-PIC numerical simulations were performed to study the generation of X-rays by the interaction of an oncoming laser wave with a relativistic electron mirror formed by a powerful accelerating laser pulse from a plasma layer. The structure of the radiated field in the far zone was investigated, and the spectral density of the radiation field and the angular distribution of the pulse energy were found. Changing the parameters of the accelerating and counterpropagating waves allows one to control the characteristics of the radiation.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"37 - 43"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Superluminal Objects in Non-Equilibrium Media 非平衡介质中的超光速物体
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709097
S. V. Sazonov
{"title":"Superluminal Objects in Non-Equilibrium Media","authors":"S. V. Sazonov","doi":"10.1134/S1062873824709097","DOIUrl":"10.1134/S1062873824709097","url":null,"abstract":"<p>An analysis is performed of the superluminal propagation of resonant and quasi-resonant soliton-like laser pulses in non-equilibrium media. It is shown that such pulses are unstable. However, the superluminal propagation of these pulse profiles can be observed at the initial stage of an instability’s development, due to the mechanism of reshaping.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"27 - 31"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modifying the van der Waals Equation to Describe the Thermodynamic Properties of Liquid Water 修改范德华方程以描述液态水的热力学性质
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709243
A. A. Volkov, S. V. Chuchupal
{"title":"Modifying the van der Waals Equation to Describe the Thermodynamic Properties of Liquid Water","authors":"A. A. Volkov,&nbsp;S. V. Chuchupal","doi":"10.1134/S1062873824709243","DOIUrl":"10.1134/S1062873824709243","url":null,"abstract":"<p>A representation of liquid water as a real gas is used to modify the van der Waals equation of state for describing isotherms, isochores, and isobars of liquid water in wide ranges of pressure and temperature. The new thermal equation allows the standard transition to thermodynamics while reproducing internal energy <i>U</i>, free energy <i>F</i>, heat capacity <i>C</i><sub><i>V</i></sub>, and entropy <i>S</i>.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"122 - 130"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of 2D Processes on the Bunching of Intense Electron Beams in Broadband Klystrons 二维工艺对宽带速调管中强电子束聚集的影响
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S106287382470919X
V. E. Rodyakin, V. N. Aksenov
{"title":"Effect of 2D Processes on the Bunching of Intense Electron Beams in Broadband Klystrons","authors":"V. E. Rodyakin,&nbsp;V. N. Aksenov","doi":"10.1134/S106287382470919X","DOIUrl":"10.1134/S106287382470919X","url":null,"abstract":"<p>Results are presented from studying the effect 2D phenomena have on electron beam bunching in single- and multi-beam broadband klystrons. Results from a comparative analysis of beam bunching using 1D and 2D models are presented as well. The causes of errors in determining the output parameters of broadband klystrons obtained using 1D programs are analyzed.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"85 - 91"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
(2 + 1)D Soliton Pairs in a Planar Quadratic Nonlinear Crystal with Inhomogeneity (具有非均质性的平面二次非线性晶体中的（2 + 1）D 孤子对
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709140
B. S. Bryantsev, A. A. Kalinovich
{"title":"(2 + 1)D Soliton Pairs in a Planar Quadratic Nonlinear Crystal with Inhomogeneity","authors":"B. S. Bryantsev,&nbsp;A. A. Kalinovich","doi":"10.1134/S1062873824709140","DOIUrl":"10.1134/S1062873824709140","url":null,"abstract":"<p>The process of formation and propagation of pulse pairs in a quadratically nonlinear crystal with two waveguides was investigated with varying parameters related to the position of the waveguides relative to each other, delay, and phase ratio between pulses. A change in the pulse propagation mode during the approach of waveguides and a dependence of the interaction between the pulses on the initial phase ratio were found.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"56 - 62"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microcavities and Photonic Time Crystals Formed by the Colliding of Half-Cycle Light Pulses in a Resonant Medium 半周期光脉冲在共振介质中碰撞形成的微腔和光子时晶
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709152
R. M. Arkhipov, M. V. Arkhipov, A. V. Pakhomov, O. O. Diachkova, N. N. Rosanov
{"title":"Microcavities and Photonic Time Crystals Formed by the Colliding of Half-Cycle Light Pulses in a Resonant Medium","authors":"R. M. Arkhipov,&nbsp;M. V. Arkhipov,&nbsp;A. V. Pakhomov,&nbsp;O. O. Diachkova,&nbsp;N. N. Rosanov","doi":"10.1134/S1062873824709152","DOIUrl":"10.1134/S1062873824709152","url":null,"abstract":"<p>The authors discuss their latest research in the generation and ultrafast control of light-induced dynamic microcavities and photonic time crystals arising from the collision of half-cycle pulses in a medium. The possibility of guiding microcavities during the collision of self-induced transparency half-cycle pulses of the same polarity is demonstrated.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"63 - 70"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generating Sub-Terahertz Chaotic Radiation in a High-Current Relativistic Gyrotron in the Mode of Frequency Multiplication 在大电流相对论陀螺仪中以倍频模式产生次太赫兹混沌辐射
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709188
N. S. Ginzburg, I. V. Zotova, A. N. Leontyev, A. M. Malkin, R. M. Rozental, A. S. Sergeev
{"title":"Generating Sub-Terahertz Chaotic Radiation in a High-Current Relativistic Gyrotron in the Mode of Frequency Multiplication","authors":"N. S. Ginzburg,&nbsp;I. V. Zotova,&nbsp;A. N. Leontyev,&nbsp;A. M. Malkin,&nbsp;R. M. Rozental,&nbsp;A. S. Sergeev","doi":"10.1134/S1062873824709188","DOIUrl":"10.1134/S1062873824709188","url":null,"abstract":"<p>It is shown that for a high-current relativistic Ka-band gyrotron operating in the chaotic generation mode on the lowest mode of a circular waveguide TE<sub>1,1</sub>, effective radiation is possible at the seventh harmonic of the gyrofrequency on the TE<sub>7,2</sub> mode. The relative width of the spectrum of chaotic sub terahertz radiation can exceed 5% at a megawatt output power level.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"80 - 84"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simulation of the Excitation of Spin Waves by the Effect of an Electric Field on Domain Walls in Magnetic Films with Inhomogeneous Magnetoelectric Interaction 具有非均匀磁电相互作用的磁膜中电场对畴壁激发自旋波的模拟
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709267
N. V. Myasnikov, A. P. Pyatakov
{"title":"Simulation of the Excitation of Spin Waves by the Effect of an Electric Field on Domain Walls in Magnetic Films with Inhomogeneous Magnetoelectric Interaction","authors":"N. V. Myasnikov,&nbsp;A. P. Pyatakov","doi":"10.1134/S1062873824709267","DOIUrl":"10.1134/S1062873824709267","url":null,"abstract":"<p>The dynamical effect of an electric field on domain walls in magnetic films with inhomogeneous magnetoelectric interaction is considered. It is shown that both homogeneous and inhomogeneous electric fields induce the excitation of spin waves.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"138 - 146"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845768","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mean Fields of Acoustic Waves with Discontinuities in Randomly Inhomogeneous Media 随机非均匀介质中不连续声波的平均场
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709231
D. M. Alekseev, V. A. Gusev
{"title":"Mean Fields of Acoustic Waves with Discontinuities in Randomly Inhomogeneous Media","authors":"D. M. Alekseev,&nbsp;V. A. Gusev","doi":"10.1134/S1062873824709231","DOIUrl":"10.1134/S1062873824709231","url":null,"abstract":"<p>Features are considered of the construction of closed equations for the mean field of acoustic waves with discontinuous profiles in a randomly inhomogeneous medium. Different approaches to obtaining such equations are compared. It is shown that despite the smoothing of profiles on average, a discontinuity in a profile should be considered before averaging. An exact expression is obtained for the mean field of the initial N-wave.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"115 - 121"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Differential Gain of THz Radiation in Crystalline Quartz in the Field of Pump Wave 晶体石英中太赫兹辐射在泵浦波场中的差分增益
IF 0.48
Bulletin of the Russian Academy of Sciences: Physics Pub Date : 2025-04-17 DOI: 10.1134/S1062873824709139
I. I. Kazakov, M. S. Guselnikov, S. A. Kozlov
{"title":"Differential Gain of THz Radiation in Crystalline Quartz in the Field of Pump Wave","authors":"I. I. Kazakov,&nbsp;M. S. Guselnikov,&nbsp;S. A. Kozlov","doi":"10.1134/S1062873824709139","DOIUrl":"10.1134/S1062873824709139","url":null,"abstract":"<p>We theoretically considered the possibility to exploit nonlinear Fabry–Pérot interferometers to differential gain of terahertz radiation in the field of a pump wave of the same frequency. It is shown that in a mirrorless nonlinear Fabry–Pérot interferometer, that consists of a crystalline quartz plate and which reflection is determined by Fresnel reflectivity only, the regime of maximal differential gain of radiation with central frequency at 1 THz can be observed at the plate thickness of near 1 mm and radiation intensity of 10<sup>8</sup> W cm<sup>–2</sup> order.</p>","PeriodicalId":504,"journal":{"name":"Bulletin of the Russian Academy of Sciences: Physics","volume":"89 1","pages":"50 - 55"},"PeriodicalIF":0.48,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143845765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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