Instruments and Experimental Techniques最新文献_第10页

An Electrostatic Lens for Correcting the Ion Beam of a Magnetron Source 用于校正磁控管源离子束的静电透镜

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700556

A. A. Terent’ev

引用次数: 0

OTDR Event Detection Method Based on Improved 1D UNet 基于改进型 1D UNet 的 OTDR 事件检测方法

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700325

Mo Yan, Ou Qiaofeng

{"title":"OTDR Event Detection Method Based on Improved 1D UNet","authors":"Mo Yan, Ou Qiaofeng","doi":"10.1134/S0020441224700325","DOIUrl":"10.1134/S0020441224700325","url":null,"abstract":"Optical time domain reflectometer (OTDR) is the most basic and widely used equipment in optical fiber detection. Its performance and trace analysis ability play a decisive role in the maintenance of optical fiber. Traditional OTDR event detection methods rely on manual definition of pulse characteristics, require professional prior knowledge, and require high signal-to-noise ratio. The traditional preprocessing methods such as smoothing and denoising have some actual signal characteristics weakened or even disappeared. UNet is the most classical U-structured network model applied to medical image segmentation. It can learn a very robust model for edge extraction by using a small amount of data. Inspired by this, we propose the first OTDR event detection method based on the improved 1D UNet, which makes full use of the convolution neural network to automatically extract signal features. It can be applied to small sample data sets and it can accurately identify multiple types of events such as power injection, reflection, drop, end and echo events, with an average detection rate of 90%. Compared with the EXFO FastReporter software widely used in the industry, our method shows a stronger ability to resist noise interference, and the detection of echo events in high noise areas reaches 89%.","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 2","pages":"332 - 342"},"PeriodicalIF":0.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567082","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 Prototype of the Cryogenic Corpuscular Hydrogen Target for the PANDA Experiment 用于 PANDA 实验的低温靠模氢靶原型

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700568

P. V. Fedorets, V. D. Chernetsky, P. V. Balanutsa, A. S. Gerasimov, A. A. Golubev, L. N. Gusev, A. G. Dolgolenko, A. V. Kantsyrev, V. I. Karasev, N. M. Kristi, E. M. Ladygina, S. A. Makagonov, V. A. Panyushkin, A. N. Paniushkina, I. A. Tarasenko, A. B. Khalyavin

{"title":"A Prototype of the Cryogenic Corpuscular Hydrogen Target for the PANDA Experiment","authors":"P. V. Fedorets, V. D. Chernetsky, P. V. Balanutsa, A. S. Gerasimov, A. A. Golubev, L. N. Gusev, A. G. Dolgolenko, A. V. Kantsyrev, V. I. Karasev, N. M. Kristi, E. M. Ladygina, S. A. Makagonov, V. A. Panyushkin, A. N. Paniushkina, I. A. Tarasenko, A. B. Khalyavin","doi":"10.1134/S0020441224700568","DOIUrl":"10.1134/S0020441224700568","url":null,"abstract":"A regular monodisperse flow of spherical microtargets of solid hydrogen or deuterium with a variable diameter of several tens of micrometers and a frequency from several tens to several hundreds of kilohertz is in demand as internal targets in physical experiments at accelerators. The paper is devoted to the modification and launching of a prototype cryogenic corpuscular hydrogen target in which the gas entering the facility is transformed into a flow of spherical microtargets. Processes of cryogenic cooling and liquefaction of the gas, formation of a liquid microjet, and its controlled monodisperse disintegration into equal-sized drops are realized in the target, and they are followed by freezing of the drops and formation of microtargets upon injection into vacuum. The target prototype is composed of the cryogenic, vacuum, and gas systems as well as the systems for control and optical diagnostics of microtarget parameters. The modified target prototype provided monodisperse regimes of generation of microtargets with a diameter of 20–50 μm at a generation frequency of 260–465 kHz.","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 2","pages":"423 - 430"},"PeriodicalIF":0.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567091","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

Scintillation Detectors of Compton Polarimeters for Measuring Polarization States of Annihilation Photons 用于测量湮灭光子偏振态的康普顿偏振计闪烁探测器

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700362

A. G. Baranov, A. P. Ivashkin, S. A. Musin, G. H. Salakhutdinov, A. O. Strizhak

引用次数: 0

Application of Nuclear Physics Methods for Plasma Diagnostics on a Gas-Dynamic Trap 在气体动力捕集器上应用核物理方法进行等离子体诊断

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700490

E. I. Pinzhenin, V. V. Maximov

{"title":"Application of Nuclear Physics Methods for Plasma Diagnostics on a Gas-Dynamic Trap","authors":"E. I. Pinzhenin, V. V. Maximov","doi":"10.1134/S0020441224700490","DOIUrl":"10.1134/S0020441224700490","url":null,"abstract":"A diagnostic system has been developed on the gas dynamic trap (GDT) for detecting deuterium fusion products as well as X rays and γ rays produced by interactions of superheated electrons with structural elements of GDT and by capture of neutrons by nuclei of surrounding materials. The diagnostic system consists of the following three subsystems. The first subsystem is used to measure the longitudinal intensity profile of the dd-fusion reaction. It is based on diode detectors of 3.02-MeV protons and preamplifiers capable of operating with large-area diodes mounted in specially developed detector modules. The detectors are located inside the vacuum chamber of the GDT; they operate in the counting mode, which allows absolute measurements of the reaction-product flux with a time resolution of ~100 μs. Such detectors were created taking into account the operating experience of a proton detector based on an experimental diode in the GDT experiment. The second subsystem is composed of detectors developed earlier on the basis of SPM-5 plastic scintillator and a photomultiplier tube (PMT). These detectors are operated in the current mode and are intended to measure the neutron-generation intensity with a time resolution as high as 25 μs. These detectors are used jointly with the proton detectors in experiments with the additional heating to determine the contribution of γ rays and hard X rays. The third subsystem is a new neutron and γ-ray spectrometer based on a stilbene scintillator and a PMT, which was used for the first time in the experiment with deuterium plasma at the GDT facility. The detector is capable of separating particles of different types, in particular, under the operating conditions of the facility when superheated electrons are generated.","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 2","pages":"240 - 252"},"PeriodicalIF":0.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567167","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

Evaluation of the Response Function of NaI (Tl) and Plastic Scintillator with Temperature Fluctuations 评估 NaI (Tl) 和塑料闪烁体对温度波动的响应函数

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700313

S. Z. Islami rad, R. Gholipour Peyvandi, S. Ghanavati

{"title":"Evaluation of the Response Function of NaI (Tl) and Plastic Scintillator with Temperature Fluctuations","authors":"S. Z. Islami rad, R. Gholipour Peyvandi, S. Ghanavati","doi":"10.1134/S0020441224700313","DOIUrl":"10.1134/S0020441224700313","url":null,"abstract":"The temperature effect plays an important role in the response function and efficiency of detectors. In this study, the behavior of doped NaI (Tl) and plastic scintillators was evaluated and compared with temperature changes, in a similar condition, for the first time. The detection system uses an experimental setup consisting of a 60Co source, NaI (Tl) detector, and a plastic scintillation detector. The results show that the recorded count rates from NaI (Tl) detector have a direct relation with temperature and lead to a 0.15%/°C error in the count rate. But in the same condition, the acquired count rates from the plastic scintillator detector were reduced with temperature increasing with a 0.57%/°C error in the count rate (inverse relation). Also, in this work, Linear and second-order polynomial regression were implemented on the recorded count rates from scintillators to compensate temperature effect. Finally, the acquired results were evaluated using the relative error (%) and diagram slope which expressed the superiority of the polynomial regression. Using this correction technique, the count rate changes reached to least and are stable with temperature fluctuations. The results of this research can be suitable for the industrial application of NaI (Tl) and plastic scintillators in level gauging, thickness gauging, and other nuclear gauging systems.","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 2","pages":"253 - 259"},"PeriodicalIF":0.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567168","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

An Active Vibration Isolator for the Space Optical Clock 用于空间光学时钟的有源振动隔离器

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700349

Wei Li, Qing Li, Keda He, Lei Liu

{"title":"An Active Vibration Isolator for the Space Optical Clock","authors":"Wei Li, Qing Li, Keda He, Lei Liu","doi":"10.1134/S0020441224700349","DOIUrl":"10.1134/S0020441224700349","url":null,"abstract":"Space optical clock is an important device for future space science experiments. Inevitably, the micro-vibration level in the order of micro-g (μg) is required for ultra-stable optical reference cavity of space optical clock. However, the existing research on active vibration isolators of space optical clock is still in the laboratory development stage, and their vibration isolation control algorithms still rely on high-performance commercial real-time controllers, making it difficult to meet the application requirements for isolators of space optical clock. On the basis of the previous work, this paper describes the development an active vibration isolator that meets the experimental requirements of the space optical clock. Based on the DSP embedded vibration isolation controller, an anti-saturation control algorithm is designed, which solves the problems of high order of robust controllers, large computing resources and difficult parameter debugging. The active vibration isolation experimental system is further developed, and the experimental results validate the effectiveness of the developed active vibration isolator and anti-saturation control algorithm.","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 2","pages":"431 - 438"},"PeriodicalIF":0.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141566914","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 Leak Detector of Methane Based on Absorption Spectroscopy Using Diode Matrixes 利用二极管矩阵开发基于吸收光谱的甲烷泄漏探测器

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700374

A. A. Boyko, A. Yu. Kiryakova, E. Yu. Erushin, N. Yu. Kostyukova

引用次数: 0

Equipment for Investigation of the Flow of Liquid from Nozzles of Submillimeter Diameter into a Low-Pressure Environment 研究液体从亚毫米直径喷嘴流入低压环境的设备

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S002044122470060X

A. S. Yaskin, A. E. Zarvin, V. V. Kalyada, K. A. Dubrovin, V. E. Khudozhitkov

引用次数: 0

Comparative Analysis of the Neutron–Gamma Discrimination Methods for Scintillators Based on Lithium Glass 基于锂玻璃的闪烁体的中子-伽马鉴别方法比较分析

IF 0.4 4区工程技术

Instruments and Experimental Techniques Pub Date : 2024-07-08 DOI: 10.1134/S0020441224700465

E. S. Kuzmin, G. D. Bokuchava, I. Yu. Zimin, A. A. Kruglov, N. A. Kuchinskiy, V. L. Malyshev

{"title":"Comparative Analysis of the Neutron–Gamma Discrimination Methods for Scintillators Based on Lithium Glass","authors":"E. S. Kuzmin, G. D. Bokuchava, I. Yu. Zimin, A. A. Kruglov, N. A. Kuchinskiy, V. L. Malyshev","doi":"10.1134/S0020441224700465","DOIUrl":"10.1134/S0020441224700465","url":null,"abstract":"The characteristics of neutron scintillation detectors built on monolithic and heterogeneous scintillators containing 6Li were studied. The detectors were tested on a thermal neutron beam and on a stand with a source of γ-quanta 60Co. To process the signals received from the detector with a monolithic scintillator, three different γ-radiation discrimination algorithms were used: registration of pulses at a constant threshold and selection according to the pulse shape using two digital signal separation methods: charge integration and pulse duration measurement. For a homogeneous scintillator, pulse shape selection methods work approximately the same when separating thermal neutrons and γ-quanta and are significantly inferior to the method of registration at a constant threshold. In this case, the quality of the n/γ separation is worse than the result obtained with a heterogeneous scintillator when recording at a constant threshold. The purpose of the work is to compare the results of using digital methods for discrimination of gamma-quanta with the results obtained using heterogeneous scintillators.","PeriodicalId":587,"journal":{"name":"Instruments and Experimental Techniques","volume":"67 2","pages":"234 - 239"},"PeriodicalIF":0.4,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141567165","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