发布求助
文献互助 智能选刊 最新文献

Instruments and Experimental Techniques最新文献

筛选
英文 中文
Time Transfer Stability Using Different Multipath Mitigation Techniques 使用不同多径缓解技术的时间传递稳定性
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-04-01 DOI: 10.1134/S0020441225701209
G. G. Hamza
{"title":"Time Transfer Stability Using Different Multipath Mitigation Techniques","authors":"G. G. Hamza","doi":"10.1134/S0020441225701209","DOIUrl":"10.1134/S0020441225701209","url":null,"abstract":"<p>Multipath reflections degrade considerably the precision of positioning and timing services introduced by the Global Navigation Satellite Systems (GNSS). Various techniques were introduced to mitigate the effect of multipath errors. One of the most commonly used techniques is weighting the received data according to the elevation angle of the observed satellite. Another technique was proposed by the author in which the optimum elevation mask (OEM) concept was introduced. In this paper, the author compares the efficiency of both the weighting and the OEM techniques. Moreover, the author proposes a mix between the two techniques to be more efficient than using either of the two techniques separately.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 6","pages":"1033 - 1038"},"PeriodicalIF":0.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
N2 Laser in Air with Longitudinal Discharge Pumping 纵向放电泵送空气中的N2激光器
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-04-01 DOI: 10.1134/S0020441225701313
I. N. Konovalov, Yu. N. Panchenko, V. F. Losev, A. V. Puchikin, D. M. Lubenko
{"title":"N2 Laser in Air with Longitudinal Discharge Pumping","authors":"I. N. Konovalov,&nbsp;Yu. N. Panchenko,&nbsp;V. F. Losev,&nbsp;A. V. Puchikin,&nbsp;D. M. Lubenko","doi":"10.1134/S0020441225701313","DOIUrl":"10.1134/S0020441225701313","url":null,"abstract":"<p>The results of the experimental investigation into a nitrogen laser pumped by a longitudinal discharge in which nitrogen is replaced by air are presented. The fabrication of an experimental sample of such a laser is reported. The laser is excited by a pulse generator with voltage inversion in storage capacitors, which charges the discharge capacitor connected to a two-section discharge tube with an inner diameter of 6.7–17 mm and a length of one section of 100–217 mm. It is shown that, at an air pressure of 7–9 mm Hg and its pumping through the discharge tube, the laser can operate with a pulse repetition rate of up to 100 Hz and provide a radiation pulse energy of 0.27–1.9 mJ at a wavelength of 337.1 nm at a duration of 4 to 13.5 ns.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 6","pages":"988 - 992"},"PeriodicalIF":0.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Visual Control System for Stripping Foils of Neutral Particle Analyzers at the ITER Tokamak: Development and Testing ITER托卡马克中性粒子分析仪剥离箔的视觉控制系统：开发与测试
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-04-01 DOI: 10.1134/S0020441225701246
V. I. Afanasyev, S. S. Kozlovsky, A. D. Melnik, M. I. Mironov, A. N. Mokeev, A. S. Navolotsky, V. G. Nesenevich, M. P. Petrov, S. Ya. Petrov, F. V. Chernyshev
{"title":"Visual Control System for Stripping Foils of Neutral Particle Analyzers at the ITER Tokamak: Development and Testing","authors":"V. I. Afanasyev,&nbsp;S. S. Kozlovsky,&nbsp;A. D. Melnik,&nbsp;M. I. Mironov,&nbsp;A. N. Mokeev,&nbsp;A. S. Navolotsky,&nbsp;V. G. Nesenevich,&nbsp;M. P. Petrov,&nbsp;S. Ya. Petrov,&nbsp;F. V. Chernyshev","doi":"10.1134/S0020441225701246","DOIUrl":"10.1134/S0020441225701246","url":null,"abstract":"<p>The complex of neutral particle analyzers is included in the priority group of diagnostic systems of the ITER tokamak that is under construction. A critical element that ensures operation of the neutral particle analyzers is a stripping target, which is a thin carbon foil with a thickness of 10–20 nm and a diameter of 20 mm, in which the neutral particle flux entering the instrument is ionized. The particle detection efficiency and the accuracy in determining the ratio of fuel ion concentrations in a plasma depend on parameters of the stripping target. A visual control system has been developed for fast determination of the mechanical integrity of stripping targets without vacuum disturbance, and results of its testing are presented. This system is based on a radiation-resistant D40M inspection camera (produced by AO Diakont) and is able to detect individual point defects in foil cells with dimensions of 0.35 × 0.35 mm<sup>2</sup>. The work is focused on the radiation resistance of the system elements most sensitive to the intense neutron background of the ITER facility, i.e., to the D40M camera and LEDs of a module used for background illumination of the stripping foil. These elements have been irradiated by a fast-neutron beam with energy as high as 14 MeV. It is shown that the video camera modified according to the test results, as well as gallium nitride-based commercially available LEDs irradiated to 1 MeV (Si) equivalent neutron fluence of 3 × 10<sup>14</sup> and 10<sup>15</sup> cm<sup>−2</sup>, respectively, retains its performance when used as part of the visual control system. As a result, the system is capable of functioning throughout the operational lifetime of the ITER tokamak.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 6","pages":"930 - 941"},"PeriodicalIF":0.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Measurement Results of Characteristics of a Vacuum Pump Made of Sintered Neg Disks for Hydrogen and Its Isotopes for Use in Plasma Installations 等离子体装置用氢及其同位素烧结负盘真空泵特性的测量结果
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-04-01 DOI: 10.1134/S0020441225701325
A. A. Krasnov, A. M. Semenov
{"title":"Measurement Results of Characteristics of a Vacuum Pump Made of Sintered Neg Disks for Hydrogen and Its Isotopes for Use in Plasma Installations","authors":"A. A. Krasnov,&nbsp;A. M. Semenov","doi":"10.1134/S0020441225701325","DOIUrl":"10.1134/S0020441225701325","url":null,"abstract":"<p>In this paper, the measured specific vacuum characteristics of a nonevaporable getter consisting of Ti–Zr–Al for hydrogen and its isotopes for use in thermonuclear fusion installations are presented. The vacuum system of neutral beam injectors requires hydrogen and deuterium pumping speed of millions of liters per second at a pressure of 10<sup>–5</sup> Torr. Specific pumping speed of approximately 0.81 L/(s cm<sup>2</sup>) for hydrogen and 0.44 L/(s cm<sup>2</sup>) for deuterium were obtained for the Ti–Zr–Al getter, and the hydrogen sorption capacity was measured, which is greater than 6 L Torr/g.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 6","pages":"1060 - 1065"},"PeriodicalIF":0.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A New Method for Comprehensive Measurements of the Magnetotransport Characteristics and Compressibility of Electrons in Channels of Field-Effect Transistors 场效应晶体管通道中电子磁输运特性和可压缩性综合测量的新方法
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-04-01 DOI: 10.1134/S0020441225701301
A. A. Kapustin, S. I. Dorozhkin, I. B. Fedorov
{"title":"A New Method for Comprehensive Measurements of the Magnetotransport Characteristics and Compressibility of Electrons in Channels of Field-Effect Transistors","authors":"A. A. Kapustin,&nbsp;S. I. Dorozhkin,&nbsp;I. B. Fedorov","doi":"10.1134/S0020441225701301","DOIUrl":"10.1134/S0020441225701301","url":null,"abstract":"<p>We describe a new method developed by us that consists in simultaneous measurements of the magnetoresistivity tensor of a quasi-2D electronic system in the channel of a field-effect transistor (FET) and several magnetocapacitances between the channel and the gates located on its both sides. The results that can be obtained using this method have been showcased in a FET with a channel in the form of a GaAs quantum well (QW) of 60-nm width within the interval of gate voltages, where this system in a weak magnetic field can be considered as a double-layer electronic system. We prove the convenience of this technique when studying the redistribution of electrons between the layers in a magnetic field and for obtaining the most comprehensive information about the properties of electronic layers even in the absence of separate ohmic contacts to each of these layers.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 6","pages":"1079 - 1086"},"PeriodicalIF":0.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development of a Hardware-Software Complex for a Terahertz Plasmonic Michelson Interferometer for Experiments at the Novosibirsk Free Electron Laser 新西伯利亚自由电子激光实验用太赫兹等离子体迈克尔逊干涉仪硬件-软件综合体的研制
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-04-01 DOI: 10.1134/S0020441225701337
S. E. Krasnopevtsev, V. V. Gerasimov
{"title":"Development of a Hardware-Software Complex for a Terahertz Plasmonic Michelson Interferometer for Experiments at the Novosibirsk Free Electron Laser","authors":"S. E. Krasnopevtsev,&nbsp;V. V. Gerasimov","doi":"10.1134/S0020441225701337","DOIUrl":"10.1134/S0020441225701337","url":null,"abstract":"<p>A control system has been developed for automated amplitude scanning of spatial interference patterns using a dynamic plasmonic Michelson interferometer for experiments with terahertz radiation from the Novosibirsk Free Electron Laser (NovoFEL). The system automates investigations by controlling a group of optical positioners while simultaneously acquiring signals from photoelectric receivers and collecting and storing data with subsequent postprocessing. The system core consists of a personal computer running Python software. Optical signals processed by lock-in amplifiers are digitized using a custom-designed dual-channel analog-to-digital converter (ADC). The system provides automated data storage in Excel format for further analysis. Testing of the complex for measuring surface plasmon polariton characteristics at the NovoFEL wavelength of 141 μm showed good agreement with data obtained previously without this system.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 6","pages":"1001 - 1014"},"PeriodicalIF":0.4,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147579142","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Visualization Experimental System for Investigating Accidental Releases from Supercritical CO2 Pipelines 研究超临界CO2管道意外泄漏的可视化实验系统
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-02-04 DOI: 10.1134/S0020441225700976
Xuhai Pan, Chenyan Wang, Long Ding, Xilin Wang, Min Hua, Qingyuan Wang, Juncheng Jiang
{"title":"A Visualization Experimental System for Investigating Accidental Releases from Supercritical CO2 Pipelines","authors":"Xuhai Pan,&nbsp;Chenyan Wang,&nbsp;Long Ding,&nbsp;Xilin Wang,&nbsp;Min Hua,&nbsp;Qingyuan Wang,&nbsp;Juncheng Jiang","doi":"10.1134/S0020441225700976","DOIUrl":"10.1134/S0020441225700976","url":null,"abstract":"<p>This study designed a visualization experimental system for investigating the flow characteristics and phase transition processes during small-hole leakage of supercritical CO<sub>2</sub> pipelines. This experimental system introduces innovations in the test pipeline, observation window, and release valve assembly, which expand the observation range and improve the universality of the experimental conclusions. In this study, experiments on supercritical CO<sub>2</sub> release were conducted at various initial temperatures using this system. The results indicated that the evolution process of supercritical CO<sub>2</sub> leakage can be categorized into three stages: supercritical, vapor-liquid phase, and vapor phase. During the transition from supercritical to vapor-liquid phase, the depressurization rate significantly decreased, leading to the formation of an inflection region on the depressurization curve. The initial temperature notably influenced both the pressure level and duration of the inflection region. When the initial temperature exceeded 55°C, the inflection region disappeared, and the release process of supercritical CO<sub>2</sub> became similar to that of vapor CO<sub>2</sub>. These experiments also demonstrated the reliability of the experimental system.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 5","pages":"884 - 894"},"PeriodicalIF":0.4,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and Development of Additively Manufactured Blended Wing Body Models for Wind Tunnel Experiments 用于风洞试验的增材制造混合翼身模型的设计与开发
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-02-04 DOI: 10.1134/S0020441225700952
S. Mohan, A. Arora, P. Kumar
{"title":"Design and Development of Additively Manufactured Blended Wing Body Models for Wind Tunnel Experiments","authors":"S. Mohan,&nbsp;A. Arora,&nbsp;P. Kumar","doi":"10.1134/S0020441225700952","DOIUrl":"10.1134/S0020441225700952","url":null,"abstract":"<p>The study provides a detailed account of the Stereolithography (SLA) additive manufacturing process used to manufacture a Blended Wing Body (BWB) model for low-subsonic wind tunnel testing. It examines the feasibility of SLA for fabricating aerodynamic models, focusing on material properties, minimum feature sizes, internal channel design, and post-processing techniques such as curing, support removal, and surface finishing. The research highlights the advantages of SLA in achieving complex geometries with smooth surfaces and fine details, demonstrating its potential as a cost-effective and efficient method for manufacturing wind tunnel models. Considerations for structural integrity, print resolution, and surface treatment are explored to enhance model accuracy. The study also outlines best practices for optimizing the manufacturing process to ensure reliable and repeatable production, making SLA a viable approach for rapid prototyping in aerodynamic research.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 5","pages":"829 - 841"},"PeriodicalIF":0.4,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Passive Reference Reflectometry for Determining Multilayer Media Levels and Parameters 测定多层介质电平和参数的被动参考反射计
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-02-04 DOI: 10.1134/S0020441225701155
E. I. Trenkal, A. V. Berestov, V. S. Pozdnyakov, Ia. A. Petenenko
{"title":"Passive Reference Reflectometry for Determining Multilayer Media Levels and Parameters","authors":"E. I. Trenkal,&nbsp;A. V. Berestov,&nbsp;V. S. Pozdnyakov,&nbsp;Ia. A. Petenenko","doi":"10.1134/S0020441225701155","DOIUrl":"10.1134/S0020441225701155","url":null,"abstract":"<p>This paper proposes a method of passive reference reflectometry based on the use of references with known localization and constant reflection coefficients within the transmission path. A comparison of different approaches to implementing passive references is presented. To enhance identification reliability, paired inhomogeneities are introduced as references, generating responses with opposite polarities. Model and experimental studies are carried out with the use of a 519-mm in length coaxial probe, with diameters of the screen and central conductor of 12 and 5 mm, respectively, with the inclusion of five equidistant paired references. The applicability of the passive reference reflectometry method for determining the relative permittivity along the path length is concluded. For this probe, when measuring a multilayer medium consisting of air, technical oil, and distilled water, the experimental error of the relative permittivity was less than 7.9% and that in the cases when the interface boundaries are located near the references is up to 34.7%. Thus, the application of the proposed method allows for determining or refining the relative permittivity of layers. This can be useful in the problems of level measurement to improve the accuracy of level determination and to obtain information about the qualitative characteristics of layers of multilayer media.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 5","pages":"707 - 714"},"PeriodicalIF":0.4,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of Noise Radiation to Determine the Refractive Index of a Substance in the Gaseous Phase and in the Condensed State in the Range of 2–4 GHz 应用噪声辐射测定2-4 GHz范围内气相和凝聚态物质的折射率
IF 0.4 4区 工程技术
Instruments and Experimental Techniques Pub Date : 2026-02-04 DOI: 10.1134/S002044122570109X
I. E. Ivanov
{"title":"Application of Noise Radiation to Determine the Refractive Index of a Substance in the Gaseous Phase and in the Condensed State in the Range of 2–4 GHz","authors":"I. E. Ivanov","doi":"10.1134/S002044122570109X","DOIUrl":"10.1134/S002044122570109X","url":null,"abstract":"<p>Continuous spectrum radiation in the frequency range of 2–4 GHz is generated by a plasma relativistic source. The pulsed radiation is fed into a rectangular waveguide measuring 72 × 34 mm<sup>2</sup> with the substance under study. A piston is inserted into the waveguide, and the refractive index of the substance is determined by the appearance of the interference pattern. The substance in the waveguide can be a gas or have the form of a rectangular bar or a cuvette with liquid. It can be used for spectroscopy of dielectrics.</p>","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"68 5","pages":"715 - 724"},"PeriodicalIF":0.4,"publicationDate":"2026-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147336410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书