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The Role of Coulomb Fields in the Formation of Emittance in Photoguns 库仑场在光枪发射率形成中的作用
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060148
V. Ya. Ivanov, A. E. Levichev
{"title":"The Role of Coulomb Fields in the Formation of Emittance in Photoguns","authors":"V. Ya. Ivanov,&nbsp;A. E. Levichev","doi":"10.1134/S1063784224060148","DOIUrl":"10.1134/S1063784224060148","url":null,"abstract":"<p>A theoretical analysis is made of the formation of longitudinal and transverse emittance of beams of charged particles in photoguns under the influence of repulsive forces of Coulomb fields. In numerical calculations, the characteristics of bunches of charged particles with uniform and Gaussian charge density distributions are compared. The efficiency of the proposed numerical-analytical model is compared with calculations using the Astra program. The obtained numerical and analytical results can be useful in the design of photoinjectors to select the optimal parameters that determine the main characteristics of photoguns.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1575 - 1583"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414206","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
Epitaxial Growth of Highly Stressed InGaAs/InAlAs Layers on InP Substrates by Molecular-Beam Epitaxy 通过分子束外延在 InP 基底上外延生长高应力 InGaAs/InAlAs 层
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060021
V. V. Andryushkin, I. I. Novikov, A. G. Gladyshev, A. V. Babichev, L. Ya. Karachinsky, V. V. Dudelev, G. S. Sokolovskii, A. Yu. Egorov
{"title":"Epitaxial Growth of Highly Stressed InGaAs/InAlAs Layers on InP Substrates by Molecular-Beam Epitaxy","authors":"V. V. Andryushkin,&nbsp;I. I. Novikov,&nbsp;A. G. Gladyshev,&nbsp;A. V. Babichev,&nbsp;L. Ya. Karachinsky,&nbsp;V. V. Dudelev,&nbsp;G. S. Sokolovskii,&nbsp;A. Yu. Egorov","doi":"10.1134/S1063784224060021","DOIUrl":"10.1134/S1063784224060021","url":null,"abstract":"<p>In this paper we present the study of the features of epitaxial growth highly stressed superlattices based on highly stressed thin InGaAs/InAlAs layers on InP substrates by the molecular beam epitaxy. It was shown that the growth rates of the InGaAs and InAlAs bulk layers lattice-matched to InP substrates do not allow us to precisely determine the growth rates of thin highly stressed In<sub>0<i>.</i>36</sub>Al<sub>0<i>.</i>64</sub>As/In<sub>0<i>.</i>67</sub>Ga<sub>0<i>.</i>33</sub>As strain compensated superlattices and the error is about 10 percent. The effect is related to the difference in the growth temperatures of InGaAs and InAlAs bulk layers, which affects the intensity of indium evaporation from the growth surface.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1493 - 1498"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413999","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 Multiparameter Model of a Space Telescope Observation System 创建太空望远镜观测系统的多参数模型
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060070
K. O. Churkin, N. K. Petrova, Yu. A. Nefedyev, A. O. Andreev, N. Yu. Demina
{"title":"Creation of a Multiparameter Model of a Space Telescope Observation System","authors":"K. O. Churkin,&nbsp;N. K. Petrova,&nbsp;Yu. A. Nefedyev,&nbsp;A. O. Andreev,&nbsp;N. Yu. Demina","doi":"10.1134/S1063784224060070","DOIUrl":"10.1134/S1063784224060070","url":null,"abstract":"<p>The possibility and effectiveness of using an automated zenith telescope to determine selenodetic rotation parameters by computer simulation of observations using a telescope installed on the lunar surface are considered, in particular, modeling of star tracks at an automated zenith telescope and the possibilities of astrophysical research, development of a space observations program.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1518 - 1520"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414027","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
Study of Histological Sections of Muscle Tissues Using X-ray Fluorescence and Raman Spectromicroscopy 利用 X 射线荧光和拉曼光谱对肌肉组织切片进行研究
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060033
I. A. Artyukov, G. P. Arutyunov, D. O. Dragunov, N. N. Melnik, D. H. A. Paneke, E. V. Perevedentseva, A. V. Sokolova, V. V. Sokolova
{"title":"Study of Histological Sections of Muscle Tissues Using X-ray Fluorescence and Raman Spectromicroscopy","authors":"I. A. Artyukov,&nbsp;G. P. Arutyunov,&nbsp;D. O. Dragunov,&nbsp;N. N. Melnik,&nbsp;D. H. A. Paneke,&nbsp;E. V. Perevedentseva,&nbsp;A. V. Sokolova,&nbsp;V. V. Sokolova","doi":"10.1134/S1063784224060033","DOIUrl":"10.1134/S1063784224060033","url":null,"abstract":"<p>The paper presents the results of a study of the chemical composition of myocardial tissues and striated muscles at the cellular level using a combination of X-ray fluorescence microscopy and Raman microspectrosopy. The distribution of inorganic materials (Na, Si, Ca, etc.) was measured with the help of X-ray fluorescence imaging and microanalysis workstations at ELETTRA synchrotron (Italy). Methods of infrared Raman spectromicroscopy were applied for the identification of organic compounds (lipids, amides, and polysaccharides). All experiments were carried out with unstained paraffin-embedded histological sections. The research was related to the study of sodium deposits in muscle tissues.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1499 - 1504"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414031","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
Optical Diffusion Diagnostics of Evolving Polymer Foams 不断演变的聚合物泡沫的光学扩散诊断技术
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S106378422406001X
M. V. Alonova, S. S. Volchkov, D. A. Zimnyakov, A. A. Isaeva, E. A. Isaeva, E. V. Ushakova, O. V. Ushakova
{"title":"Optical Diffusion Diagnostics of Evolving Polymer Foams","authors":"M. V. Alonova,&nbsp;S. S. Volchkov,&nbsp;D. A. Zimnyakov,&nbsp;A. A. Isaeva,&nbsp;E. A. Isaeva,&nbsp;E. V. Ushakova,&nbsp;O. V. Ushakova","doi":"10.1134/S106378422406001X","DOIUrl":"10.1134/S106378422406001X","url":null,"abstract":"<p>Various approaches to the optical diagnostics of evolving polymer foams formed as a result of a decrease in the external pressure according to a given scenario in the “polymer-supercritical fluid” systems are considered. Formed polymer foams are considered as a material platform for the creation of scaffolds for biomedical applications. Diagnostics of the current state of the foam was carried out by statistical analysis of the spatiotemporal fluctuations of the probe laser radiation, multiple scattered in the volume of the evolving foam, or by analyzing the fluorescent response during foaming of the “polymer-fluorophore” mixture, pumped by laser radiation in the absorption band of the fluorophore. A relationship has been established between the average lifetime of dynamic speckles in scattered laser light and a generalized parameter characterizing the foam expansion dynamics. It was also found that the waveguide effect in the walls of the formed pores has a significant influence on the fluorescent response of the evolving foam, leading to an increase in the characteristic dwell time of fluorescence radiation in the walls and, accordingly, to an increase in the contribution of the induced component to the fluorescent response.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1483 - 1492"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414183","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
Diffraction Mathematical Model of a Laser Speckle Interferometer of Transverse Displacements of a Scattering Object 散射物体横向位移激光斑点干涉仪的衍射数学模型
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060240
L. A. Maksimova, N. Yu. Mysina, B. A. Patrushev, V. P. Ryabukho
{"title":"Diffraction Mathematical Model of a Laser Speckle Interferometer of Transverse Displacements of a Scattering Object","authors":"L. A. Maksimova,&nbsp;N. Yu. Mysina,&nbsp;B. A. Patrushev,&nbsp;V. P. Ryabukho","doi":"10.1134/S1063784224060240","DOIUrl":"10.1134/S1063784224060240","url":null,"abstract":"<p>On the basis of diffraction transformations of wave fields, a mathematical model of a speckle interferometer of transverse displacements of a scattering object has been developed and numerical modeling of speckle-modulated interference patterns and signals at the output of the interferometer has been performed. Numerical calculations of the spatial distribution of complex amplitudes of wave fields in an interferometer were used for modeling when the displaced scattering surface was illuminated by two obliquely incident laser Gaussian beams. A statistical numerical experiment was performed to determine the measurement error of the scattering surface displacement caused by the change of realizations of interfering speckle fields. The simulation results are in good agreement with the results of experimental studies of transverse displacements in the range up to 600 micrometers.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1646 - 1655"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414193","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
Modeling of the Dynamics of Extremely Short Optical Pulses in Carbon Nanotubes with Random Impurities Taking into Account Multiphoton Absorption 考虑到多光子吸收的随机杂质碳纳米管中极短光脉冲的动力学建模
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060045
S. V. Belibikhin, N. N. Konobeeva, M. B. Belonenko
{"title":"Modeling of the Dynamics of Extremely Short Optical Pulses in Carbon Nanotubes with Random Impurities Taking into Account Multiphoton Absorption","authors":"S. V. Belibikhin,&nbsp;N. N. Konobeeva,&nbsp;M. B. Belonenko","doi":"10.1134/S1063784224060045","DOIUrl":"10.1134/S1063784224060045","url":null,"abstract":"<p>In this work, we study the evolution of an extremely short pulse in a dielectric crystal with carbon nanotubes containing an impurity with random parameters (energy level, electron hybridization energy). The dependence of the spatial characteristics of the pulse on the impurity parameters and the number of photons taken into account in the model is analyzed.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1505 - 1509"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413967","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
Numerical Modeling of Acoustic Instability in a Nonequilibrium Vibrationally Excited Gas 非平衡振动激发气体中的声不稳定性数值建模
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060173
S. S. Khrapov, G. S. Ivanchenko, V. P. Radchenko, A. V. Titov
{"title":"Numerical Modeling of Acoustic Instability in a Nonequilibrium Vibrationally Excited Gas","authors":"S. S. Khrapov,&nbsp;G. S. Ivanchenko,&nbsp;V. P. Radchenko,&nbsp;A. V. Titov","doi":"10.1134/S1063784224060173","DOIUrl":"10.1134/S1063784224060173","url":null,"abstract":"<p>Based on gas-dynamic methods, numerical modeling of the nonlinear dynamics of sound waves in a vibrationally excited nonequilibrium gas was carried out and the main stages of the evolution of acoustic instability were studied. It is shown that in numerical models the linear regime with an exponential growth law of the amplitude of disturbances is in good agreement with the linear analysis of stability, and at the nonlinear stage of development of acoustic instability, a system of shock waves is formed. The effects of nonlinear saturation of the intensity of shock waves, caused by the stabilization of acoustic instability, are demonstrated.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1596 - 1601"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142413982","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
Experimental-Calculated Estimation of Fiber Laser’s Response to Pulsed X-rays 光纤激光器对脉冲 X 射线响应的实验-计算估算
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060100
S. M. Dubrovskikh, O. V. Tkachev, V. P. Shukailo, A. N. Slobozhanin, A. N. Afanasiev
{"title":"Experimental-Calculated Estimation of Fiber Laser’s Response to Pulsed X-rays","authors":"S. M. Dubrovskikh,&nbsp;O. V. Tkachev,&nbsp;V. P. Shukailo,&nbsp;A. N. Slobozhanin,&nbsp;A. N. Afanasiev","doi":"10.1134/S1063784224060100","DOIUrl":"10.1134/S1063784224060100","url":null,"abstract":"<p>Experiments have been carried out to study the transient radiation-induced absorption in the active core of a double-clad ytterbium fiber and the response of a laser based on it under the exposure of pulsed X-rays. It has been found that the time of loss of laser performance (downtime) under pulsed irradiation increases with an increase in the absorbed of radiation and a decrease in the laser pump power and reaches values of ∼1 ms. An analysis of the experimental results shows that the laser response to the X-rays pulse exposure is determined by radiation-induced losses in the active fiber core. An experimental-calculated method for estimating the radiation reaction of a laser, based on the results of studies of the active fiber, is proposed.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1540 - 1547"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414026","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
Brittle Fracture of a Conductor in a Strong Pulsed Magnetic Field 强脉冲磁场中导体的脆性断裂
IF 1.1 4区 物理与天体物理
Technical Physics Pub Date : 2024-09-26 DOI: 10.1134/S1063784224060392
P. A. Russkikh, G. Sh. Boltachev, S. N. Paranin
{"title":"Brittle Fracture of a Conductor in a Strong Pulsed Magnetic Field","authors":"P. A. Russkikh,&nbsp;G. Sh. Boltachev,&nbsp;S. N. Paranin","doi":"10.1134/S1063784224060392","DOIUrl":"10.1134/S1063784224060392","url":null,"abstract":"<p>The main factors resulting in conductor failure under the action of a strong pulsed magnetic field are analyzed. The theoretical model describes the geometry of a cylindrical thick-walled solenoid and considers magnetic field diffusion, ohmic heating of the material and mechanical stresses arising in it. The magnetic field amplitude at which induced stresses in the material reach the von Mises yield criterion is used as the <i>B</i><sub>th</sub> threshold field separating the areas of safe (non-destructive) and dangerous fields. In the case of an initially uniform material, the maximum heating temperature corresponding to this limit, which predetermines the thermomechanical stress, has been derived analytically. In the general case, based on the analysis of the calculated threshold field, the influence of various parameters (magnetic pulse characteristics, elastic moduli of the material, etc.) on the conductor resistance in the pulsed magnetic field is studied and ways of increasing the threshold field are proposed, in particular, by using different spatial profiles of the initial resistivity. It is shown that in comparison with a uniform material, a modified layer with increased resistivity formed on the surface allows to significantly increase the amplitude of the magnetic pulse withstood by the material without fracture.</p>","PeriodicalId":783,"journal":{"name":"Technical Physics","volume":"69 6","pages":"1769 - 1779"},"PeriodicalIF":1.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414135","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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