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Journal of Siberian Federal University-Mathematics & Physics最新文献

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Growth of Epitaxial Layers of the Si1-x-yGexSny Solid Solution from a Tin Solution-Melt 锡溶液熔体中Si1-x-yGexSny固溶体外延层的生长
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-29 DOI: 10.25205/2541-9447-2023-18-1-53-60
A. Razzokov
{"title":"Growth of Epitaxial Layers of the Si1-x-yGexSny Solid Solution from a Tin Solution-Melt","authors":"A. Razzokov","doi":"10.25205/2541-9447-2023-18-1-53-60","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-1-53-60","url":null,"abstract":"Mono-crystal films of a graded-gap solid solution Si1-x-yGexSny on Si <111>substrates were grown by liquid-phase epitaxy from a limited tin solution-melt in the temperature range 500–1100 °C. The chemical composition of the grown epitaxial films was determined using a scanning electron microscope.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"212 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79425446","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
Measurement of the Parameters of the RF Gun of the Linear Accelerator of the Siberian Ring Source of Photons 西伯利亚环光子源直线加速器射频炮参数的测量
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-28 DOI: 10.25205/2541-9447-2023-18-1-14-27
Xiaochao Ma, M. A. Arsentyeva, A. Batrakov, A. Levichev, V. Volkov, O. Meshkov, Yu I Maltseva, D. Nikiforov, A. Pavlenko, K. Fan
{"title":"Measurement of the Parameters of the RF Gun of the Linear Accelerator of the Siberian Ring Source of Photons","authors":"Xiaochao Ma, M. A. Arsentyeva, A. Batrakov, A. Levichev, V. Volkov, O. Meshkov, Yu I Maltseva, D. Nikiforov, A. Pavlenko, K. Fan","doi":"10.25205/2541-9447-2023-18-1-14-27","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-1-14-27","url":null,"abstract":"The paper analyzes the results of the first experiments to obtain the design parameters of the RF cannon beam of the linear accelerator of the Siberian Ring Synchrotron Radiation Source (SKIF) and describes the diagnostic methods used in this case. The studied parameters include the transverse and longitudinal profiles of the beam, its emittance, energy and energy spread, current, charge and particle losses. The obtained values are compared with the numerical simulation data.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"9 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90433374","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
Peculiarities of Determination of the Optical Parameters (n and κ) of a Semiconductor Heterostructure from Transmission and Reflection Spectra 利用透射和反射光谱测定半导体异质结构光学参数n和κ的特性
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-87-94
A. Kovalyov
{"title":"Peculiarities of Determination of the Optical Parameters (n and κ) of a Semiconductor Heterostructure from Transmission and Reflection Spectra","authors":"A. Kovalyov","doi":"10.25205/2541-9447-2022-17-4-87-94","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-4-87-94","url":null,"abstract":"In the wavelength range λ = 900–1200 nm, the spectral dependences of the refractive index n and extinction coefficient κ of a thin film, which is the heterostructure based on In0.2Ga0.8As/GaAs quantum wells, are found. The values of n and κ found at each point of the spectrum provide the minimum of the objective function, which is the sum of the module of the differences between the calculated reflection and transmission coefficients and the measured reflection and transmission coefficients of the sample grown on the GaAs substrate.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"66 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80471896","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
Investigation of the Formation and Further Development of Longitudinal Disturbances and Their Secondary Instability on the Flying Wing Model 飞翼模型纵向扰动及其二次不稳定性的形成和进一步发展研究
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-45-57
V. Kaprilevskaya
{"title":"Investigation of the Formation and Further Development of Longitudinal Disturbances and Their Secondary Instability on the Flying Wing Model","authors":"V. Kaprilevskaya","doi":"10.25205/2541-9447-2022-17-4-45-57","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-4-45-57","url":null,"abstract":"Detailed investigation of two-dimensional roughness element influence on the flow behind three-dimensional roughness element was carried out. For the first time studies were conducted on the windward side of the flying wing in the range of free-stream 7,2 – 20 m/s in the favourable gradient region behind roughness elements. Secondary instability mechanisms of disturbances leading to turbulence stage were investigated. It was shown that longitudinal structure forming behind three-dimensional roughness element grows downstream and has its trajectory slightly bend. The longitudinal structure consists of two stationary disturbances different in size. This can be explained by presence of cross flow and secondary disturbances leading to the transition. On the straight wing model, influence of the distributed suction on the stationary disturbance development was investigated and quantitatively determined. It was shown that suction is able to relaminarize the flow and eliminate the separation of the boundary layer.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"1016 ","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72506291","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
On the Methodology for Estimating the Relationship of Disturbances Using Digital Signal Processing in Relation to Measurements in Supersonic Flows 超声速流测量中干扰关系的数字信号处理方法研究
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-58-71
L. V. Afanasiev, A. Kosinov, A. Yatskikh, S. A. Shipul’, N. V. Semenov
{"title":"On the Methodology for Estimating the Relationship of Disturbances Using Digital Signal Processing in Relation to Measurements in Supersonic Flows","authors":"L. V. Afanasiev, A. Kosinov, A. Yatskikh, S. A. Shipul’, N. V. Semenov","doi":"10.25205/2541-9447-2022-17-4-58-71","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-4-58-71","url":null,"abstract":"The paper describes a digital signal processing technique for determining the relationship between disturbances in a supersonic flow and pulsations of the boundary layer of a flat plate model. Estimates of the error of the proposed data processing method are given, the results of an experiment conducted to demonstrate the method on real data are presented.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"9 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76999490","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
Radar Method in a Uniformly Accelerated Reference Frame 均匀加速参考系下的雷达方法
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-18-30
V. Voytik
{"title":"Radar Method in a Uniformly Accelerated Reference Frame","authors":"V. Voytik","doi":"10.25205/2541-9447-2022-17-4-18-30","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-4-18-30","url":null,"abstract":"The purpose of this work is to generalize the radar method known for the inertial frame of reference to the case of a uniformly accelerated frame of reference.The derivation of the corresponding formulas is based on the standard for the theory of relativity metric of a uniformly accelerated Möller frame of reference without applying any space-time transformation between some auxiliary inertial frame and the accelerated frame. To solve the problem of determining the trajectory of a light beam, depending on the initial direction of propagation, Fermat’s principle is used. To calculate the flight time of a photon to an object, knowing its coordinates, the condition of the light-likeness of the interval for the propagation of light is additionally introduced.The resulting trajectory of the light particle is an arc of a circle. For a small area near the source, the photon trajectory coincides with the parabolic trajectory of a classical corpuscle. An equation has been derived for the direction in which the radio signal is sent. The actual location of the object is not in the direction of the initial motion of the photon, but somewhat lower. The value of the angle of gravitational refraction for a closely spaced resting object is calculated. The further the object is in the “horizontal” direction, the greater the angle of refraction. The flight time of the light signal to the object is found. The signal emitted in the direction that forms an acute angle with the direction of acceleration leads the radio signal in the inertial frame of reference. Therefore, for a close object located above the radiation source, the calculated Shapiro delay time is negative. The coordinates of the remote object are also calculated.The totality of the obtained equalities completely determines the radar method. The resulting equalities, perhaps, allow for experimental verification.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"34 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86813181","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
Department of Nanocomposite Materials of Novosibirsk State University (Physics Department, Department of Natural Sciences) 新西伯利亚国立大学纳米复合材料系(自然科学系物理系)
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2022-12-16 DOI: 10.25205/2541-9447-2022-17-3-102-108
M. Predtechenskiy, A. A. Khasin
{"title":"Department of Nanocomposite Materials of Novosibirsk State University (Physics Department, Department of Natural Sciences)","authors":"M. Predtechenskiy, A. A. Khasin","doi":"10.25205/2541-9447-2022-17-3-102-108","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-3-102-108","url":null,"abstract":"The article presents the department of nanocomposite materials of the Novosibirsk State University, describing the history of its creation. The reader can also find here some general information about the staff and the courses taught.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"91 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79129567","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
Chair of Aerophysics and Gas Dynamics of the Physics Department at Novosibirsk State University 新西伯利亚国立大学物理系空气物理学和气体动力学教授
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2022-12-16 DOI: 10.25205/2541-9447-2022-17-3-61-65
V. Fomin
{"title":"Chair of Aerophysics and Gas Dynamics of the Physics Department at Novosibirsk State University","authors":"V. Fomin","doi":"10.25205/2541-9447-2022-17-3-61-65","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-3-61-65","url":null,"abstract":"The article is dedicated to the Chair of Aerophysics and Gas Dynamics of the Physics Department of Novosibirsk State University based at the Khristianovich Institute of Theoretical and Applied Mechanics SB RAS.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"36 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90254660","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
Investigation of a Radiofrequency Plasma Generator for Multi-Second Pulse Operation 用于多秒脉冲操作的射频等离子体发生器的研究
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2022-12-15 DOI: 10.25205/2541-9447-2022-17-3-5-11
V. A. Vointsev, D. Y. Gavrisenko, A. Kondakov, O. Sotnikov, R. A. Finashin
{"title":"Investigation of a Radiofrequency Plasma Generator for Multi-Second Pulse Operation","authors":"V. A. Vointsev, D. Y. Gavrisenko, A. Kondakov, O. Sotnikov, R. A. Finashin","doi":"10.25205/2541-9447-2022-17-3-5-11","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-3-5-11","url":null,"abstract":"This paper presents the test results of a radiofrequency (RF) plasma generator, developed for neutral beam injectors. A water cooled faraday screen is installed into the generator for multi-second pulse operation. Consistent operation achieved for 20-second long pulses with input power of 38 kW is described. The density of the ion current was measured. The experiments were conducted to measure the density of the ion current at the driver’s output and to evaluate the heating of the driver’s elements. Main factors affecting the power losses were determined. The power loss caused by the eddy currents in the driver’s clamping flanges were reduced.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"71 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74985380","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
Study of the Regimes of Diffusive Combustion of a Hydrogen Microjet 氢微射流扩散燃烧状态的研究
IF 0.4
Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2022-12-15 DOI: 10.25205/2541-9447-2022-17-3-12-21
V. Kozlov, M. Litvinenko, Yu. A. Litvinenko, A. Tambovtsev, A. Shmakov
{"title":"Study of the Regimes of Diffusive Combustion of a Hydrogen Microjet","authors":"V. Kozlov, M. Litvinenko, Yu. A. Litvinenko, A. Tambovtsev, A. Shmakov","doi":"10.25205/2541-9447-2022-17-3-12-21","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-3-12-21","url":null,"abstract":"The paper presents the results of experimental studies of scenarios of diffusion combustion of a microjet of hydrogen flowing out of a cylindrical micronozzle with a diameter of 200 μm. The hydrogen microjet is ignited near the nozzle exit and at a distance. The experimental data are compared with the data previously obtained, and the results are expressed in dimensionless parameters (in terms of Reynolds numbers). It is established that the stabilization of flame during the outflow of a circular micro jet of hydrogen is associated with the presence of heating of the nozzle by a spherical flame region covering the nozzle section. The hysteresis of the diffusion combustion process of circular hydrogen microjets is shown depending on the ignition location of the microjet (near or far from the nozzle exit) and the change in the flow rate (growth or decrease).","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"440 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83646006","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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