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Investigation of the Effect of γ-Irradiation on the Optical Properties of Lithium Niobate by Optical Absorption and Raman Scattering Methods 用光学吸收和拉曼散射方法研究γ辐照对铌酸锂光学性质的影响
IF 0.4 Q3 Mathematics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-95-102
Z. T. Azamatov, M. A. Yuldoshev, N. Bazarbaev
The paper presents the results of studies of the effect of γ-irradiation on the photorefractive properties of lithium niobate (LiNbO3), using optical absorption and Raman spectroscopy of Raman scattering. It is shown that with γ-irradiation, the optical density of the lithium niobate crystal increases, i.e. the shift of the optical absorption edge towards long waves, with an increase in the irradiation dose, the refractive index increases, in the interval 1300 ÷ 1600 cm–1 with γ-irradiation at a frequency of 1375 cm–1, peaks appear due to centers of significant changes in Raman scattering frequencies.
本文介绍了γ辐照对铌酸锂(LiNbO3)光折变性能影响的研究结果,采用光学吸收和拉曼散射的拉曼光谱。结果表明,在γ辐照下,铌酸锂晶体的光密度增加,即光吸收边向长波方向移动,随着辐照剂量的增加,折射率增加,在1300 ~ 1600 cm-1区间,γ辐照频率为1375 cm-1时,由于拉曼散射频率中心的显著变化,出现了波峰。
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引用次数: 0
Evolution of the Beam Emittance in Linear Induction Accelerator with Discrete Focusing System 离散聚焦直线感应加速器中光束发射度的演化
IF 0.4 Q3 Mathematics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-31-44
D. Nikiforov, A. V. Ivanov, S. Sinitsky, N. A. Vinokurov, A. Petrenko, P. Logachev, D. I. Skovorodin, E. Sandalov, V. Kurkuchekov, A. Batrakov, A. Pavlenko, E. Bekhtenev, A. Senchenko, P. Bak, K. Zhivankov, O. Meshkov, O. Pavlov, G. Kuznetsov, M. Batazova, I. V. Zhuravlev, O. Nikitin, I. V. Penzin, D. Petrov, R. V. Protas
The paper analyzes the evolution of the emittance of a kiloampere electron beam in a linear induction accelerator (LIA) with a discrete focusing system in order to assess the possibility of its application as a driver for generating radiation according to the free electron laser (FEL) scheme. In this analysis, special attention is paid to the geometry and parameters of the electron injector, the entry of particles from which into the accelerating structure of such an LIA mainly determines the characteristics of the beam at its exit. The features of the transverse dynamics of the beam during its passage through this accelerating structure are studied. The influence of various factors contributing to an increase in the beam emittance at the output of the LIA is considered. Analytical estimates of the beam parameters are compared with the results of numerical simulation. Based on the results of comparing the measured beam emittance with its value obtained in numerical simulation, it was concluded that the beam parameters are adequate for pumping terahertz oscillations in the FEL cavity
本文分析了具有离散聚焦系统的线性感应加速器(LIA)中千安培电子束发射度的演变,以评估其作为自由电子激光(FEL)方案中产生辐射的驱动器的可能性。在本分析中,特别注意了电子注入器的几何形状和参数,粒子从电子注入器进入这种LIA的加速结构主要决定了其出口光束的特性。研究了梁通过该加速结构时的横向动力学特性。考虑了各种因素对LIA输出端光束发射度增加的影响。分析估计的梁参数与数值模拟结果进行了比较。通过对束流发射度测量值与数值模拟结果的比较,得出束流参数能够满足在自由电子激光器腔内泵送太赫兹振荡的结论
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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 Q3 Mathematics 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
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.
本文介绍了一种用于确定超声速流动扰动与平板模型边界层脉动之间关系的数字信号处理技术。给出了所提出的数据处理方法的误差估计,并给出了在实际数据上验证该方法的实验结果。
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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 Q3 Mathematics Pub Date : 2023-05-10 DOI: 10.25205/2541-9447-2022-17-4-18-30
V. Voytik
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.
本工作的目的是将已知的惯性参照系雷达方法推广到匀加速参照系的情况。相应公式的推导基于均匀加速参考系Möller的相对论度规标准,而无需在辅助惯性系与加速系之间进行任何时空变换。为了解决根据光束的初始传播方向确定光束轨迹的问题,采用了费马原理。为了在已知物体坐标的情况下计算光子到物体的飞行时间,还引入了光传播间隔的光相似条件。由此产生的光粒子的轨迹是一个圆弧。在光源附近的一个小区域内,光子轨迹与经典粒子的抛物轨迹一致。已经导出了无线电信号发送方向的方程。物体的实际位置不是在光子的初始运动方向上,而是稍微低一些。计算了距离较近的静止物体的重力折射角值。物体在“水平”方向上越远,折射角度越大。得到了光信号到目标的飞行时间。在与加速度方向成锐角方向发射的信号将无线电信号引到惯性参照系中。因此,对于位于辐射源上方的近距离物体,计算出的夏皮罗延迟时间为负。同时计算远程目标的坐标。所得等式的总和完全决定了雷达方法。由此得出的等式或许可以通过实验验证。
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引用次数: 0
Analytical and Technological Research Center “High Technologies & Nanostructured Materials”: History, Formation and Achieved Results 高新技术与纳米结构材料分析技术研究中心:历史、形成与成果
IF 0.4 Q3 Mathematics Pub Date : 2022-12-17 DOI: 10.25205/2541-9447-2022-17-3-66-88
P. Geydt, A. V. Arzhannikov, A. L. Aseev, A. Shklyaev, V. Volodin, I. Azarov, V. Zaikovskii, D. Utkin, Y. Larichev, S. Chepkasov, S. Kuznetsov
The article provides information about the history of formation, development, main recent activities and achieved results of the Analytical and Technological Research Center of the Faculty of Physics of Novosibirsk State University (ATRC NSU) during its 15 years of operation. The main areas of physical research are: modern materials science, nanomaterials, nanotechnologies and technological processes, experimental diagnostics of structures and substances, development of methods for nanostructures fabrication, computer simulation of low-dimensional structures, improvement of the characteristics of solid-state semiconductor electronics, search for materials for storage and transfer of digital information, study of technological properties of low-dimensional semiconductors, catalysts, metamaterials and organic optoelectronics, study of materials and systems for terahertz electronics. Due to the organization of the Shared Research Facilities “High Technologies and Analytics of Nanosystems” (CCU “VTAN”) within the structure, ATRC successfully cooperates with scientific and educational organizations and with industrial companies of the real sector of the economy in the Siberian region, Russia and neighboring countries. The main part of scientific research is carried out by the staff of the youth Laboratory of Functional Diagnostics of Nanoscale Systems for Nanoelectronics (LabFDNS) that contributes to the involvement of students and young employees of NSU into the implementation of relevant in-demand research work, and thus provides them with a high level of training in their chosen specialty.
本文介绍了新西伯利亚国立大学物理学院分析技术研究中心(ATRC NSU)成立15年来的历史、发展、主要活动和取得的成果。物理研究的主要领域有:现代材料科学,纳米材料,纳米技术和工艺过程,结构和物质的实验诊断,纳米结构制造方法的发展,低维结构的计算机模拟,固态半导体电子学特性的改进,寻找用于存储和传输数字信息的材料,低维半导体,催化剂的技术特性研究,超材料和有机光电子学,太赫兹电子材料和系统的研究。由于在结构内组织了共享研究设施“纳米系统的高科技和分析”(CCU“VTAN”),ATRC成功地与西伯利亚地区,俄罗斯和邻国的科学和教育组织以及实体经济部门的工业公司合作。科学研究的主要部分是由纳米电子学纳米系统功能诊断青年实验室(LabFDNS)的工作人员进行的,这有助于NSU的学生和年轻员工参与相关需求研究工作的实施,从而为他们提供所选专业的高水平培训。
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引用次数: 0
Accelerator Mass Spectrometry “Golden Valley” 加速器质谱“金谷”
IF 0.4 Q3 Mathematics Pub Date : 2022-12-17 DOI: 10.25205/2541-9447-2022-17-3-89-101
V. Parkhomchuk, A. Petrozhitskii, M. M. Ignatov, E. Parkhomchuk
Information about the resources of the laboratory “AMS Golden Valley” and the state of affairs in accelerator mass spectrometry (AMS) in Russia is presented. The key differences of the AMS method from traditional methods for determining radiocarbon are described, the principle of operation of accelerator mass spectrometers of Russian (unique scientific facility “AMS BINP SB RAS”) and Swiss (MICADAS-28) production is given, and basic information is given about the methods for preparing graphite targets for AMS-analysis.
介绍了“AMS金谷”实验室的资源和俄罗斯加速器质谱(AMS)的现状。介绍了AMS方法与传统放射性碳测定方法的主要区别,介绍了俄罗斯(独特的科学设备“AMS BINP SB RAS”)和瑞士(MICADAS-28)生产的加速器质谱仪的工作原理,并介绍了AMS分析用石墨靶的制备方法的基本信息。
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引用次数: 0
Structure and Properties of Composite Coatings Cold Sprayed from Powder Mixtures of Aluminum and Boron Carbide 铝硼混合粉末冷喷涂复合涂层的结构与性能
IF 0.4 Q3 Mathematics Pub Date : 2022-12-16 DOI: 10.25205/2541-9447-2022-17-3-47-52
V. Kosarev, V. Shikalov, M. Fouad, T. Vidyuk, S. Klinkov
In the present work, an experimental study of the effect of aluminum and boron carbide powder mixture composition on the microstructure and basic properties of the cold sprayed coatings was carried out for the first time. A series of coatings deposited on stainless steel substrates was obtained. The microstructure of the deposited coatings was analyzed by scanning electron microscopy and X-ray diffraction analysis. The microhardness and bonding strength of the coatings were measured. It was shown that an increase from 0 to 72 vol.% in the boron carbide content in the powder mixture leads to an increase in its content from 0 to 15-17 vol.% in the coating, its microhardness – from 46.3 to 72.4 HV0.3, and bonding strength – from 17.4 to 61.4 MPa. The obtained results open up broad prospects for the application of the cold spray method to deposition of functional coatings, which are highly demanded in the nuclear industry.
本文首次进行了碳化铝和碳化硼粉末混合成分对冷喷涂涂层组织和基本性能影响的实验研究。获得了一系列在不锈钢基体上沉积的涂层。采用扫描电镜和x射线衍射分析了镀层的显微组织。测定了涂层的显微硬度和结合强度。结果表明:粉末混合物中碳化硼含量从0 ~ 72 vol.%增加,涂层中碳化硼含量从0 ~ 15 ~ 17 vol.%增加,显微硬度从46.3提高到72.4 HV0.3,结合强度从17.4提高到61.4 MPa。研究结果为冷喷涂法在核工业中应用于功能涂层的沉积开辟了广阔的前景。
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引用次数: 1
Development of a Heat Converter Based on the Anomalous Photovoltaic Effect 基于反常光伏效应的热转换器的研制
IF 0.4 Q3 Mathematics Pub Date : 2022-12-16 DOI: 10.25205/2541-9447-2022-17-3-53-59
K. Onarkulov, R. Nurdinova, Sh. A. Yuldashev, A. Yuldashev
In this article, an optoelectronic method, technique and technology for obtaining a stabilized electric field using external, natural renewable sources of various types has been developed. The proposed device operates on the basis of the anomalous photovoltaic effect (AFN effect) where the heat of human body is converted into an electric field. It is shown that using the potential of an electric field it is possible to develop individual, autonomously operating micro-miniature optoelectronic devices for various purposes.
本文发展了一种利用各种类型的外部自然可再生能源获得稳定电场的光电方法、技术和工艺。该装置是基于反常光伏效应(AFN效应),将人体的热量转化为电场。研究表明,利用电场的电位,可以开发出用于各种用途的独立、自主操作的微微型光电器件。
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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 Q3 Mathematics Pub Date : 2022-12-16 DOI: 10.25205/2541-9447-2022-17-3-102-108
M. Predtechenskiy, A. A. Khasin
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.
文章介绍了新西伯利亚国立大学纳米复合材料系,描述了其创建的历史。读者还可以在这里找到一些关于员工和所教授课程的一般信息。
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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 Q3 Mathematics Pub Date : 2022-12-16 DOI: 10.25205/2541-9447-2022-17-3-61-65
V. Fomin
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.
这篇文章是献给新西伯利亚国立大学物理系的空气物理学和气体动力学主席的,该物理系位于kristianovich理论和应用力学研究所SB RAS。
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引用次数: 0
期刊
Journal of Siberian Federal University-Mathematics & Physics
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