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

Study of Self-Excited Pitch Oscillations of Conical-Spherical Body at Mach Number M = 1.75 and Two Moments of Inertia 马赫数M = 1.75和两转动惯量条件下圆锥球体自激俯仰振动研究

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-29 DOI: 10.25205/2541-9447-2023-18-1-43-52

N. A. Mishchenko, E. A. Chasovnikov

引用次数: 0

Evolution of the Electronic Structure and Elastic Properties of β-glycine under the Influence of External Hydrostatic Pressure: Quantum Chemical Modeling 外静水压力下β-甘氨酸电子结构和弹性性质的演化:量子化学模型

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-29 DOI: 10.25205/2541-9447-2023-18-1-61-88

M. A. Khainovsky, E. Boldyreva, V. Tsirelson

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Beam-Plasma Generator of the THz Radiation Based on an Induction Accelerator (LIA-PET Project) 基于感应加速器的太赫兹辐射束等离子体发生器(LIA-PET项目)

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-29 DOI: 10.25205/2541-9447-2023-18-1-28-42

A. V. Arzhannikov, S. Sinitsky, D. F. Starostenko, P. Logachev, P. Bak, D. Nikiforov, S. Popov, P. Kalinin, D. Samtsov, E. Sandalov, M. Atlukhanov, A. N. Grigoriev, S. O. Vorobyov, D. Petrov, R. V. Protas

{"title":"Beam-Plasma Generator of the THz Radiation Based on an Induction Accelerator (LIA-PET Project)","authors":"A. V. Arzhannikov, S. Sinitsky, D. F. Starostenko, P. Logachev, P. Bak, D. Nikiforov, S. Popov, P. Kalinin, D. Samtsov, E. Sandalov, M. Atlukhanov, A. N. Grigoriev, S. O. Vorobyov, D. Petrov, R. V. Protas","doi":"10.25205/2541-9447-2023-18-1-28-42","DOIUrl":"https://doi.org/10.25205/2541-9447-2023-18-1-28-42","url":null,"abstract":"BINP SB RAS together with RFNC-VNIITF carry out a research in the field of creating new sources of electromagnetic radiation in the THz range. Within the framework of this article, a project of the THz beam-plasma generator based on an electron beam generated by a linear induction accelerator is presented. The article provides generator scheme and describes the main elements of the electron beam formation system. In addition, the results of modeling the beam transport and its cross-section compression are presented. These calculations were performed under the current up to 1 kA and energy up to 1 MeV for the subsequent injection of the beam into the plasma section with plasma density up to 1015 –1016 cm–3. The article also contains the analysis of previous experimental studies results which are connected with the beam-plasma interaction for various beam and plasma parameters. Based on this analysis, a requirement for the ratio of the beam and plasma electron densities was formulated. This requirement should be satisfied for creation of the beam-plasma generator of EM radiation for the range of 0.1–1 THz with a pulse power of several MW.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"13 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82558083","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

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

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-29 DOI: 10.25205/2541-9447-2023-18-1-53-60

A. Razzokov

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

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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

引用次数: 0

Energy Loss Measurements on the Limiter of the Gas Dynamic Trap 气体动态捕集器限制器的能量损失测量

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-08-28 DOI: 10.25205/2541-9447-2023-18-1-5-13

A. K. Meyster, E. Soldatkina, D. Yakovlev

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

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-87-94

A. Kovalyov

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Features of the Flow Structure in the Boundary Layer on the Flying Wing Model 飞翼模型边界层流动结构特征

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-72-86

A. Pavlenko, B. Zanin, N. S. Alpatskiy, E. Melnik

{"title":"Features of the Flow Structure in the Boundary Layer on the Flying Wing Model","authors":"A. Pavlenko, B. Zanin, N. S. Alpatskiy, E. Melnik","doi":"10.25205/2541-9447-2022-17-4-72-86","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-4-72-86","url":null,"abstract":"In a subsonic wind tunnel, the effect of slip and attack angles on the separation structure of the flow around the model of a trapezoidal flying wing was experimentally studied. In the course of this fundamental study, visualization patterns of a near-wall flow on the leeward side of the wing were obtained at the angles of attack of 0 and 18 degrees and oncoming flow velocity of 25 m/s. It was shown for the first time that gradual increase in slip angle of the wing leads to the restructuring of the flow, up to the disappearance of the local or global separation region on one of the consoles of the model. At the same time, on the second console, the separation is maintained. An increase in the angle of attack of the swept wing led to the development of a separation region: from a locally separated bubble to separation from the leading edge with a reverse flow and the formation of a pair of large-scale vortices. For the first time, singular points on the surface of the model for each mode have been found; by setting cone-shaped perturbation sources in these points one can achieve a significant improvement in the flow around the wing.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"14 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81919601","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

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-45-57

V. Kaprilevskaya

引用次数: 0

On Possible Mechanism of Enhancement of Absorption of Powerful Laser Radiation by Metals 金属增强强激光辐射吸收的可能机理研究

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Journal of Siberian Federal University-Mathematics & Physics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-5-17

V. Zhukov

{"title":"On Possible Mechanism of Enhancement of Absorption of Powerful Laser Radiation by Metals","authors":"V. Zhukov","doi":"10.25205/2541-9447-2022-17-4-5-17","DOIUrl":"https://doi.org/10.25205/2541-9447-2022-17-4-5-17","url":null,"abstract":"In this work, it is shown that the dependence of the mass of conductive band electrons in a metal on their energy can be a reason of enhancement of the absorption of powerful laser radiation by the metal. To do this, a problem of response (current) of the electron placed in one-dimension periodic potential (lattice) to an electric field periodic in time (electromagnetic wave) is solved. The solution shows that for sufficiently large amplitude of the wave the dependence of the electron current on the wave amplitude becomes non-linear. Within a certain rangе of parameters, this dependence can be described by a simple formula that corresponds to the dependence of the electron mass on its energy. The formula was used for solving the problem of penetration of electromagnetic wave into a metal with the approach of modified Drude model. The non-linearity results in the enhancement of the wave absorption and generation of wave with frequencies close to those of plasma penetrating deep into the metal. The discussed effects manifest themselves in electric fields about. 1 V/Angstrom. The obtained results can be used in the interpretation of experiments data and in the creation of mathematical modeling of the interaction of powerful laser radiation with metal.","PeriodicalId":43965,"journal":{"name":"Journal of Siberian Federal University-Mathematics & Physics","volume":"5 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2023-05-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85481521","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