Instruments and Experimental Techniques最新文献

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Design and Implementation of Chopper Control System for HIAF 为 HIAF 设计和实施斩波器控制系统

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700611

Pengpeng Wang, Wei Zhang, Chao Yuan, Baopeng Wang, Tao Ma, Xing Fang

Abstract

The chopper control system which is synchronized by the White Rabbit timing network is designed and implemented to meet the requirements of the chopper of ion source for the High-Intensity Heavy Ion Accelerator Facility (HIAF). The hardware system consists of timing modulation controller, waveform acquisition, parameter setting, and remote control of the chopper power supply. The software includes low-level drivers and top-level applications which are based on Experimental Physics and Industrial Control System (EPICS). The combination of hardware and software completes the interaction of timing messages with the White Rabbit network, waveform acquisition, the setting of timing modulation parameters in several running modes, and remote control of the chopper power supply, etc. The test results show that the system can achieve timing modulation with a resolution of 8 ns and waveform acquisition of embedded EPICS IOC (input/output controller) at a 125 MHz sample rate. The design, implementation, and test of the chopper control system are described in this paper.

摘要为满足高强度重离子加速器（HIAF）离子源斩波器的要求，设计并实现了白兔定时网络同步的斩波器控制系统。硬件系统包括定时调制控制器、波形采集、参数设置和斩波器电源的远程控制。软件包括基于实验物理和工业控制系统（EPICS）的底层驱动程序和顶层应用程序。软硬件结合完成了与白兔网络的定时信息交互、波形采集、多种运行模式下的定时调制参数设置以及斩波器电源的远程控制等功能。测试结果表明，该系统可实现分辨率为 8 ns 的定时调制和 125 MHz 采样率的嵌入式 EPICS IOC（输入/输出控制器）波形采集。本文介绍了斩波器控制系统的设计、实现和测试。

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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 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700349

Wei Li, Qing Li, Keda He, Lei Liu

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.

摘要空间光学钟是未来空间科学实验的重要设备。空间光学时钟的超稳定光学基准腔不可避免地需要微克（μg）级的微振动。然而，现有的空间光学钟主动隔振器研究仍处于实验室开发阶段，其隔振控制算法仍依赖于高性能的商用实时控制器，难以满足空间光学钟隔振器的应用要求。本文在前人工作的基础上，介绍了一种满足空间光学时钟实验要求的主动隔振器的研制情况。在 DSP 嵌入式隔振控制器的基础上，设计了一种抗饱和控制算法，解决了鲁棒控制器阶数高、计算资源大、参数调试难等问题。进一步开发了主动隔振实验系统，实验结果验证了所开发的主动隔振器和抗饱和控制算法的有效性。

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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 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

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

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.

摘要研究了由含 6Li 的单片和异质闪烁体构成的中子闪烁探测器的特性。在热中子束和装有 60Co γ 量子源的台架上对探测器进行了测试。为了处理从带有单片闪烁体的探测器接收到的信号，使用了三种不同的 γ 辐射判别算法：在恒定阈值下对脉冲进行登记，以及使用两种数字信号分离方法（电荷积分和脉冲持续时间测量）根据脉冲形状进行选择。对于均质闪烁体，在分离热中子和γ-量子时，脉冲形状选择方法的效果大致相同，但明显不如在恒定阈值下注册的方法。在这种情况下，n/γ 量子分离的质量比使用异质闪烁体在恒定阈值下记录的结果要差。这项工作的目的是比较用数字方法分辨伽马量子和用异质闪烁体分辨伽马量子的结果。

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引用次数: 0

Polished Fiber as a Promising Element for Coupling with a Microresonator with a Whispering Gallery Mode 抛光光纤是与具有悄声画廊模式的微谐振器耦合的理想元件

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700519

D. D. Ruzhitskaya, A. K. Vorob’ev, N. A. Kapridov, A. A. Samoilenko, K. N. Min’kov

Abstract

The article proposes a methodology for creating a coupling element for a whispering gallery mode microresonator based on a polished optical fiber that does not require the use of expensive components and technologies. It is demonstrated that the proposed coupling element provides coupling efficiency up to 30% and allows for control of the polarization state of the input illumination into the microresonator.

摘要文章提出了一种基于抛光光纤的悄悄话画廊模式微谐振器耦合元件的制作方法，它不需要使用昂贵的元件和技术。研究表明，所提出的耦合元件可提供高达 30% 的耦合效率，并可控制微谐振器输入照明的偏振态。

引用次数: 0

Measurement of the Field Map in Pulsed Bending Accelerating Magnets Using Hall Probes 使用霍尔探头测量脉冲弯曲加速磁铁中的磁场分布图

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700593

K. S. Shtro, A. M. Batrakov, I. V. Ilyin, I. N. Okunev, A. V. Pavlenko, S. V. Sinyatkin

Abstract

The described system is designed to measure the field map of pulse bending magnets of accelerators. As an example, the magnet, which is an element of the particle bypass channel from the booster to the nuclotron of the NICA complex, which is being created at JINR, is chosen. Analyzing the capabilities of various methods in pulsed-field measurements and requirements for measurement errors in bending magnets better than 10^–3 have led to the development of a method based on the use of Hall probes. The article substantiates the developed method, describes its capabilities, and the hardware developed for conducting measurements. In the conclusions, results of measurements of pulsed bending magnets of the booster–nuclotron channel are presented and analyzed.

摘要所描述的系统旨在测量加速器脉冲弯曲磁体的场图。作为一个例子，我们选择了一块磁铁，它是正在日本核研究开发机构（JINR）建造的从助推器到 NICA 核加速器的粒子旁路通道的一个元件。通过分析脉冲磁场测量中各种方法的能力以及对弯曲磁体测量误差小于 10-3 的要求，开发出了一种基于霍尔探针的方法。文章证实了所开发的方法，介绍了其功能以及为进行测量而开发的硬件。在结论中，介绍并分析了助推器-核反应堆通道脉冲弯曲磁体的测量结果。

引用次数: 0

Spatial Modulator of Coherent Radiation Based on a Liquid-Crystal Display of a Personal Computer 基于个人电脑液晶显示器的相干辐射空间调制器

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700441

P. V. Korolenko, R. T. Kubanov, N. N. Pavlov

Abstract

The possibility of creating a simple and cheap spatial light modulator based on a liquid crystal matrix of a personal computer display is considered and implemented.

摘要考虑并实现了在个人计算机显示器液晶矩阵的基础上创建一个简单而廉价的空间光调制器的可能性。

引用次数: 0

Modifications of the Separationless Oil–Water–Gas Flowmeter with a Dual Isotope Gamma-Densitometer for Particular Cases of Applications 针对特定应用情况对带有双同位素伽马密度计的无分离油-水-气流量计进行的改进

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s002044122470057x

A. Yu. Filippov, Yu. P. Filippov, A. M. Kovrizhnykh

Abstract

On the basis of a three-phase horizontal flowmeter with a nominal diameter DN 100, options for designing and creating relatively simple two-phase flowmeters without devices for measuring the average density of a mixture of low-viscosity flows, e.g., water–gas, are proposed using only conical narrowing devices (NDs) of various sizes, which are characterized by such features as the crisis of the hydraulic resistance in NDs and various quantitative characteristics that describe this crisis. A calculation and experimental method is proposed that demonstrates the principal possibility of finding the gas volume fraction β using pressure drops ∆Р at both NDs. An unusual calculation model is proposed based on the need to know a pair of measured pressure drops’ ∆P values and preliminary experimental calibration dependences ∆P(β) for both NDs at different volumetric liquid flow rates Q₁, and it is shown that the resulting errors in determining Q₁ and β are quite acceptable for practice in some cases. A universal design of a two-phase flowmeter has been proposed and created, thus allowing the operation with liquid–gas flows not only of relatively low viscosity, but also of comparatively high viscosity, as well as with two-phase liquid flows. This flowmeter is based on a combination of a pair of NDs and a tuning fork densitometer, thus providing a measurement accuracy acceptable for practice. A variant of a three-phase oil–water–gas flowmeter is also presented.

摘要在公称直径为 DN 100 的三相水平流量计的基础上，提出了设计和制造相对简单的两相流量计的方案，这些两相流量计不带测量低粘度混合物（如水气）平均密度的装置，仅使用各种尺寸的锥形缩径装置 (ND)。提出了一种计算和实验方法，证明了利用两个 ND 的压降 ∆Р 求得气体体积分数 β 的主要可能性。根据在不同液体容积流量 Q1 下两个 ND 的一对实测压降 ∆P 值和初步实验校准依赖关系 ∆P(β) 的需要，提出了一个不同寻常的计算模型，并表明在某些情况下，确定 Q1 和 β 时产生的误差在实践中是完全可以接受的。我们提出并创建了一种两相流量计的通用设计，因此不仅可用于粘度相对较低的液-气流，也可用于粘度相对较高的液-气流，还可用于两相液体流。这种流量计基于一对 ND 和一个音叉密度计的组合，因此测量精度在实际应用中是可以接受的。此外，还介绍了一种三相油-水-气流量计的变体。

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引用次数: 0

Transmission Line Pulse Setup for Electrostatic Discharge Robustness Testing of the Semiconductor Devices 用于半导体器件静电放电鲁棒性测试的传输线脉冲设置

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700453

V. V. Kuznetsov, V. V. Andreev

Abstract

An original transmission line pulse setup has been presented. This test setup allows to measure quasi-static I–V curves of the semiconductor devices and electrostatic discharge protection and investigate the electrostatic discharge robustness of the integrated circuits. The setup allows to perform both destructive and nondestructive tests. The designed test setup allows to perform transmission line pulse test using 100 ns pulse with current peak value up to 10 A according to the IEC62615 international standard.

摘要介绍了一种独创的传输线脉冲装置。该测试装置可测量半导体器件的准静态 I-V 曲线和静电放电保护，并研究集成电路的静电放电鲁棒性。该装置可进行破坏性和非破坏性测试。根据 IEC62615 国际标准，所设计的测试装置可使用 100 ns 脉冲执行传输线脉冲测试，电流峰值可达 10 A。

引用次数: 0

Design of Magnetic Shield and System Test of Strong Static Magnetic Field for ITER Radial X-Ray Camera Electronics 国际热核聚变实验堆径向 X 射线照相机电子设备的磁屏蔽设计和强静态磁场系统测试

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700337

Qiang Li, Liqun Hu, Hongrui Cao, Jinglong Zhao, Kaiyun Chen, Li Jiang, Hong Yu, Weikun Chen, Yongqiang Zhang

Abstract

The intense magnetic field surrounding the electronic system in the ITER Tokamak necessitates the use of magnetic field shielding to protect electronic devices from failure. To ensure that the components installed in these areas can withstand ITER’s magnetic environment, they must be tested beforehand for magnetic field tolerance. This paper presents a magnetic shielding design for the Radial X-ray Camera (RXC) electronic system in ITER, silicon steel sheet is used as shielding material. The design scheme was simulated and analyzed using Ansys Maxwell software, and the shield shell was designed and optimized to reduce the magnetic induction intensity from 120 mT to less than 60 mT. To determine whether the magnetic field tolerance capability of the shield and electronic system meets ITER’s requirements, tests were conducted. Based on the experimental results, it has been observed that the shield is effective in shielding the magnetic field to 50–60 mT. Furthermore, the electronic system has been tested under a magnetic field intensity of 140 mT and 180 mT, and it has been found to be functioning normally, thereby meeting the requirements of ITER.

摘要热核实验堆托卡马克电子系统周围的强磁场要求使用磁场屏蔽，以保护电子设备不发生故障。为确保安装在这些区域的组件能够承受热核实验堆的磁场环境，必须事先对它们进行磁场耐受性测试。本文介绍了针对国际热核聚变实验堆径向 X 射线照相机（RXC）电子系统的磁屏蔽设计，使用硅钢片作为屏蔽材料。使用 Ansys Maxwell 软件对设计方案进行了模拟和分析，并对屏蔽外壳进行了设计和优化，以将磁感应强度从 120 mT 降低到 60 mT 以下。为确定屏蔽罩和电子系统的磁场耐受能力是否满足热核实验堆的要求，进行了相关测试。实验结果表明，屏蔽罩能有效屏蔽 50-60 mT 的磁场。此外，还在 140 mT 和 180 mT 的磁场强度下对电子系统进行了测试，发现其运行正常，因此符合热核实验堆的要求。

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引用次数: 0

A Radiophysical Complex for Studying the Influence of the Propagation Environment on Orthogonally Polarized Electromagnetic Waves 用于研究传播环境对正交偏振电磁波影响的辐射物理综合体

IF 0.6 4区工程技术 Q4 ENGINEERING, MULTIDISCIPLINARY

Instruments and Experimental Techniques

Pub Date : 2024-07-08 DOI: 10.1134/s0020441224700398

V. L. Gulko, A. A. Mescheryakov, N. K. Blinkovsky

Abstract

A radiophysical complex is considered for studying the influence of the propagation environment on orthogonally linearly polarized electromagnetic waves with horizontal and vertical polarizations. The radiophysical complex made it possible to register the quadrature components of the received orthogonally polarized signals and to calculate the amplitudes and phases of the signals and their polarization characteristics from them. Electromagnetic waves were emitted with equal amplitudes, initial phases, and wavelengths from two points spatially separated in the horizontal plane. In the framework of the two-vibrator scattering model, an analytical expression for the scattering operator is obtained, which makes it possible to estimate the differential characteristics of the propagation medium. The relationship between the model parameters and the obtained experimental estimates of the polarization characteristics of the received orthogonally linearly polarized signals on a surface path with a length of 8 km is confirmed.

摘要为研究传播环境对具有水平和垂直极化的正交线性极化电磁波的影响，考虑了一种辐射物理复合体。该辐射物理复合体可以记录接收到的正交偏振信号的正交分量，并从中计算出信号的振幅和相位及其偏振特性。电磁波以相等的振幅、初始相位和波长从水平面上空间相隔的两点发射。在双振子散射模型的框架内，得到了散射算子的解析表达式，从而可以估算传播介质的微分特性。模型参数与在长度为 8 千米的表面路径上接收到的正交线性极化信号的极化特性的实验估计值之间的关系得到了证实。

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