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Effect of Annealing and Additional Deformation on the Dynamic Properties of Ultrafine-Grained AMg4.5 Alloy 退火和附加变形对超细晶粒 AMg4.5 合金动态特性的影响
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070132
A. D. Evstifeev, E. Yu. Vitokhin
{"title":"Effect of Annealing and Additional Deformation on the Dynamic Properties of Ultrafine-Grained AMg4.5 Alloy","authors":"A. D. Evstifeev,&nbsp;E. Yu. Vitokhin","doi":"10.1134/S1063784224070132","DOIUrl":"10.1134/S1063784224070132","url":null,"abstract":"<p>The possibility of increasing the static and dynamic strength of the aluminum-magnesium alloy AMg4.5 is shown by using methods of severe plastic deformation, a combination of annealing and additional deformation of ultrafine grained alloy. The strength properties of the material are evaluated using a structural-temporal approach to the analysis of experimental data on the dynamic tension of small samples obtained on split-Hopkinson pressure bar.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"1950 - 1955"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414526","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
Investigation of the Composition of Samarium Monosulfide Films Obtained by Electron Beam Heating 通过电子束加热获得的单硫化钐薄膜的成分研究
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070065
E. B. Baskakov, V. I. Strelov
{"title":"Investigation of the Composition of Samarium Monosulfide Films Obtained by Electron Beam Heating","authors":"E. B. Baskakov,&nbsp;V. I. Strelov","doi":"10.1134/S1063784224070065","DOIUrl":"10.1134/S1063784224070065","url":null,"abstract":"<div><p>The elemental composition of thin films obtained by electron beam heating of bulk SmS samples with a different element ratio: 1Sm:1S, 1.05Sm:1S and 1.15Sm:1S has been studied by energy dispersive spectroscopy. The analysis of elemental composition before and after spraying on the substrate was carried out on a volume sample of the composition 1.15Sm:1S. According to the microanalysis data, a change in the content of elements was established and an assessment of the change in the phase composition in the sprayed material was made. It is shown that the composition of the obtained thin films contains an excessive Sm content. A method for determining the inhomogeneity of the composition in depth for SmS films is proposed, in which, using a two stream model of charged particle transport, the dependence of the electron beam path on the primary electron energy in SmS for energies up to 30 keV is calculated.</p></div>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"1901 - 1906"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414472","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
Mechanisms of Magnetic Field Formation at a Large Distance from the Galactic Center 距离银河中心较远的磁场形成机制
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070193
T. T. Khasaeva, E. A. Mikhailov
{"title":"Mechanisms of Magnetic Field Formation at a Large Distance from the Galactic Center","authors":"T. T. Khasaeva,&nbsp;E. A. Mikhailov","doi":"10.1134/S1063784224070193","DOIUrl":"10.1134/S1063784224070193","url":null,"abstract":"<p>The possibility of generating a magnetic field at a large distance (10–15 kpc) from the center of the galaxy has been investigated. The magnetic field can be generated both by the dynamo mechanism, considering nonlinear effects, and by magnetorotational instability. Presumably, the nonlinear effects of the dynamo mechanism play a more significant role at this distance.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"1994 - 1996"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414376","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 Method for Detecting Small Oscillations Based on Homodyne Demodulation with a Tandem Low-Coherence Interferometer 基于同调解调的串联低相干干涉仪小振荡检测方法
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070508
P. V. Volkov, D. A. Semikov, O. S. Vyazankin, A. V. Goryunov, A. Yu. Lukyanov, A. D. Tertyshnik
{"title":"A Method for Detecting Small Oscillations Based on Homodyne Demodulation with a Tandem Low-Coherence Interferometer","authors":"P. V. Volkov,&nbsp;D. A. Semikov,&nbsp;O. S. Vyazankin,&nbsp;A. V. Goryunov,&nbsp;A. Yu. Lukyanov,&nbsp;A. D. Tertyshnik","doi":"10.1134/S1063784224070508","DOIUrl":"10.1134/S1063784224070508","url":null,"abstract":"<p>The paper proposes a method for detecting small oscillations in the length of interference fiber-optic sensors, which makes it possible to compensate for the problem of slow drift of the working point with a remote sensor. The result is achieved by combining homodyne demodulation methods with a tandem low-coherence interferometer. Theoretically and experimentally, the possibility of detecting acoustic effects in the operating frequency band of 4 kHz with a sensitivity of up to 0.3 nm has been shown.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2175 - 2178"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414491","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
Characteristics of a Silicon Carbide Field Emission Array under Pre-Breakdown Conditions 预击穿条件下碳化硅场发射阵列的特性
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070314
V. A. Morozov, N. V. Egorov, V. V. Trofimov, K. A. Nikiforov, I. I. Zakirov, V. M. Kats, V. A. Ilyin, A. S. Ivanov
{"title":"Characteristics of a Silicon Carbide Field Emission Array under Pre-Breakdown Conditions","authors":"V. A. Morozov,&nbsp;N. V. Egorov,&nbsp;V. V. Trofimov,&nbsp;K. A. Nikiforov,&nbsp;I. I. Zakirov,&nbsp;V. M. Kats,&nbsp;V. A. Ilyin,&nbsp;A. S. Ivanov","doi":"10.1134/S1063784224070314","DOIUrl":"10.1134/S1063784224070314","url":null,"abstract":"<p>This study assesses promising field electron sources based on silicon carbide monolithic field emission array (FEA). FEA is fabricated on single-crystal wafers of silicon carbide (0001C) 6<i>H</i>-SiC of <i>n</i>-type conductivity using the technology of two-stage reactive ion etching in SF<sub>6</sub>/O<sub>2</sub>/Ar atmosphere. To implement conditions close to breakdown, an experimental setup based on high-voltage narrow pulses generating device GKVI-300 was used. A series of nanosecond voltage pulses with amplitudes from 120 to 250 kV was generated. To study the characteristics of the FEA in the pre-breakdown state, the beam of field emitted electrons was separated from the ion torch or cathode plasma, formed in the following breakdown phases, by placing a 50-μm-thick titanium foil under zero potential into the interelectrode gap. Current-voltage characteristics of peak-currents vs. peak-voltages passing through the foil are close to rectilinear in the Fowler–Nordheim coordinates. The current-voltage characteristics plotted for each of the pulses along increasing and decreasing branches show a discrepancy (hysteresis). After the experiments, the silicon carbide cathode FEA was studied in a scanning electron microscope.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2059 - 2065"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414383","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
Creation of a Physical Model of Phobos Using Mars Express Mission Data 利用火星快车任务数据创建火卫一物理模型
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070211
Yu. A. Kolosov, A. O. Andreev, N. Yu. Demina, Yu. A. Nefedyev
{"title":"Creation of a Physical Model of Phobos Using Mars Express Mission Data","authors":"Yu. A. Kolosov,&nbsp;A. O. Andreev,&nbsp;N. Yu. Demina,&nbsp;Yu. A. Nefedyev","doi":"10.1134/S1063784224070211","DOIUrl":"10.1134/S1063784224070211","url":null,"abstract":"<p>The remote sensing data of Phobos are analyzed based on the data from “MarsExpress” and “Viking Orbiter” space missions. Based on this study, a structural model of Phobos was constructed. According to the results obtained, we conclude that the relief of Phobos is very ambiguous. Its entire surface is covered with many traces of meteorite impacts—craters. The parameters for a series of impact craters were obtained and their multi-factor analysis was performed.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2005 - 2006"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414448","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
Correction of the GN Model for Fiber Optical Communication Links with Distributed Raman Amplification 修正具有分布式拉曼放大功能的光纤通信链路的 GN 模型
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070454
D. D. Starykh, L. A. Samodelkin, O. E. Nany, V. N. Treshchikov
{"title":"Correction of the GN Model for Fiber Optical Communication Links with Distributed Raman Amplification","authors":"D. D. Starykh,&nbsp;L. A. Samodelkin,&nbsp;O. E. Nany,&nbsp;V. N. Treshchikov","doi":"10.1134/S1063784224070454","DOIUrl":"10.1134/S1063784224070454","url":null,"abstract":"<p>Novel method of nonlinear interchannel distortions generation in coherent multichannel fiber-optic transmission was proposed. Series of experiments was made to measure nonlinear interference noise in links with distributed amplification by co-propagating Raman pump. Based on the measurement results, a correction term to known GN-model formulas for calculating the power of nonlinear interference noise was proposed. Proposed formula demonstrate acceptable accuracy.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2141 - 2148"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414563","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
Mathematical Modeling of the Main Characteristics of Cold Field and Thermal Field Electron Cathodes of Scanning Electron Microscopes in the Study of Biological Samples 扫描电子显微镜冷场和热场电子阴极在生物样本研究中的主要特性的数学建模
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070284
S. N. Mamaeva, A. N. Pavlov, N. A. Nikolaeva, G. V. Maksimov
{"title":"Mathematical Modeling of the Main Characteristics of Cold Field and Thermal Field Electron Cathodes of Scanning Electron Microscopes in the Study of Biological Samples","authors":"S. N. Mamaeva,&nbsp;A. N. Pavlov,&nbsp;N. A. Nikolaeva,&nbsp;G. V. Maksimov","doi":"10.1134/S1063784224070284","DOIUrl":"10.1134/S1063784224070284","url":null,"abstract":"<p>Main emission characteristics of thermal field and cold field electron cathodes were calculated. Emitters surface forms are approximated by second-order surfaces and anodes are approximated by equipotential surfaces. Systems, consisting of 18 first order ordinary differential equations, are solved using the numerical Runge–Kutta method. As a result, trajectories of the “boundary” electrons were obtained, which determine beam shapes and sizes and density distributions charges and electric field strengths. Analysis of beam parameters let to determine special properties of scanning electron microscopes with thermal field electron cathodes and with cold field electron cathodes for studying biological samples.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"2045 - 2048"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414370","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
Reciprocity Relations for Mechanically Induced Spin Currents in Metals in a Nonlinear Regime 非线性状态下金属中机械诱导自旋电流的互易关系
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070168
V. K. Ignatjev
{"title":"Reciprocity Relations for Mechanically Induced Spin Currents in Metals in a Nonlinear Regime","authors":"V. K. Ignatjev","doi":"10.1134/S1063784224070168","DOIUrl":"10.1134/S1063784224070168","url":null,"abstract":"<p>In the Markov relaxation and locally quasi-equilibrium distribution approximation, analogues of Onzager’s relations for the response functions of the spin current in the nonlinear by intense mechanical and thermodynamic effects regime were obtained by the Kubo method.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"1973 - 1978"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414374","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
Electrically Exploded Current Opening Switch for Fast Transfer of Energy from an Inductive Storage to a Load 用于从电感式储能器向负载快速传输能量的电爆电流开路开关
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-27 DOI: 10.1134/S1063784224070077
A. A. Bazanov, A. N. Erofeyev, A. V. Ivanovskiy, V. I. Mamyshev, E. V. Shapovalov
{"title":"Electrically Exploded Current Opening Switch for Fast Transfer of Energy from an Inductive Storage to a Load","authors":"A. A. Bazanov,&nbsp;A. N. Erofeyev,&nbsp;A. V. Ivanovskiy,&nbsp;V. I. Mamyshev,&nbsp;E. V. Shapovalov","doi":"10.1134/S1063784224070077","DOIUrl":"10.1134/S1063784224070077","url":null,"abstract":"<div><p>The paper presents the results of model testing of the electrically exploded current interrupter (opening switch) designed for the switching system used to release the electromagnetic energy from the inductive storage to the load through a closing switch-discharger. A capacitor bank was used as a source of energy for the inductive storage. Some features of the interrupter were varied in order to increase its reliability and operation speed. The obtained experimental data allowed making recommendations on practical implementation of the opening switch. The optimized version demonstrated a possibility to form current pulses with submicrosecond rise time, up to ~100 ns, in the low-impedance loads of the inductive storages. The obtained result is true for the currents of megaampere and multimegaampere level that makes it possible to use the opening switch for commutation of the energy sources with high energy capacity, for example, of the explosive magnetic generators.</p></div>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 7","pages":"1907 - 1911"},"PeriodicalIF":1.1,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414530","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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