The Review of scientific instruments最新文献

Magnetostriction measurements at milli-kelvin temperatures using a Fabry-Pérot interferometer. 利用法布里-佩罗干涉仪在毫开尔文温度下测量磁致伸缩。

The Review of scientific instruments Pub Date : 2024-04-01 DOI: 10.1063/5.0191294

Finnian J. Blaauw-Smith, Luke S. Trainor, Gavin G. G. King, N. J. Lambert, Masaya Hiraishi, J. Longdell

引用次数: 0

Temporal evolution of electron cloud in a cylindrical Penning trap at room temperature. 室温下圆柱形潘宁陷阱中电子云的时间演变。

The Review of scientific instruments Pub Date : 2024-04-01 DOI: 10.1063/5.0194917

J. Nandi, A. K. Sikdar, A. Kumar, S. Alam, P. Das, A. Ray

引用次数: 0

Magnetic field analysis of a hybrid excitation multi-degree-of-freedom spherical motor. 混合激励多自由度球面电机磁场分析。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0122450

Bingsen Zeng, Jianghua Cao, Qing Chen, Guanming Zhong

{"title":"Magnetic field analysis of a hybrid excitation multi-degree-of-freedom spherical motor.","authors":"Bingsen Zeng, Jianghua Cao, Qing Chen, Guanming Zhong","doi":"10.1063/5.0122450","DOIUrl":"https://doi.org/10.1063/5.0122450","url":null,"abstract":"A hybrid excitation multi-degree-of-freedom spherical motor (HE-MDOFSM) is designed, which can achieve MDOF motion by cooperatively controlling the excitation current in 12 sets of stator windings. The designed motor has the advantages of high power density and a large motion range. In addition, because the designed motor has an irregular three-dimensional (3D) structure, it is difficult to perform dynamic magnetic field calculations with existing methods. To solve this problem, we propose a modified 3D dynamic magnetic equivalent circuit (3DD-MEC). The proposed method establishes a node network according to the structural edge features of the motor core and the permanent magnet and calculates the reluctance of the connecting branch based on the differential principle. Moreover, a connection strategy of air-gap nodes in 3D space is formulated, and the magnetic saturation characteristics of the iron core are reflected by an iterative calculation of magnetic permeability. Using the 3DD-MEC method, the 3D dynamic magnetic field information of the HE-MDOFSM can be quickly and accurately calculated. Finally, the reliability of the method is verified by simulation and experiment, which provides a reference for improving the design optimization efficiency of HE-MDOFSM.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"115005"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40569993","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

FPGA: Field programmable gate array-based four-channel embedded system for ultrasonic imaging of under-water concrete structures. FPGA:基于现场可编程门阵列的水下混凝土结构超声成像四通道嵌入式系统。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0101490

Harshit Jain, V H Patankar

{"title":"FPGA: Field programmable gate array-based four-channel embedded system for ultrasonic imaging of under-water concrete structures.","authors":"Harshit Jain, V H Patankar","doi":"10.1063/5.0101490","DOIUrl":"https://doi.org/10.1063/5.0101490","url":null,"abstract":"Non-destructive testing is needed for the evaluation of quality and safety of concrete structures in the field of civil engineering. The imaging of concrete/reinforced cement concrete structures (RCC) is a challenging task due to the non-homogeneous properties of the concrete material. To address this challenge, a novel real-time, re-configurable, four-channel embedded system has been designed and developed to image the internal details of the concrete samples using the water immersion pulse-echo (PE) mode under automation, which needs access from one side of the structure. The system performs data acquisition (DAQ) of the amplified echo signals under the control of the computer via a universal serial bus interface. A graphical user interface (GUI) has been developed using C# in a Visual environment, for image acquisition and control of the DAQ parameters. The performance of the system has been evaluated by acquiring B-Scan images of three types of concrete test blocks having side drilled holes (SDHs) and simulated inclusions embedded in concrete blocks of M20 grade using a linear array of 92 kHz water immersion transducers operating in under-water PE mode. The acquired B-Scan images revealed the internal details of the concrete test blocks with sizing of the SDHs and inclusions. Therefore, the developed four-channel ultrasonic imaging system can visualize the internal details of under-water concrete structures, such as bridges and sea links, with the help of corresponding 2-D cross-sectional images, acquired using the developed system.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"114706"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40457970","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: 3

An automated fast neutron computed tomography instrument with on-line focusing for non-destructive evaluation. 用于无损评价的在线聚焦快中子计算机断层扫描仪。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0091032

M G Bisbee, I Oksuz, M P VanZile, N J Cherepy, L R Cao

{"title":"An automated fast neutron computed tomography instrument with on-line focusing for non-destructive evaluation.","authors":"M G Bisbee, I Oksuz, M P VanZile, N J Cherepy, L R Cao","doi":"10.1063/5.0091032","DOIUrl":"https://doi.org/10.1063/5.0091032","url":null,"abstract":"A fast neutron tomography imaging instrument has been designed, built, and tested at The Ohio State University 500 kW Research Reactor on a fast neutron beamline with a peak neutron flux ≈5.4 × 107 n·cm-2·s-1 at 1.6 MeV median neutron energy. The instrument and beamline are also configurable for thermal neutron imaging. The imaging apparatus is composed of a lens coupled, water-cooled Electron Multiplying Charge Coupled Device camera, a front-surface mirror, and a high light yield plastic Polyvinyl toluene scintillator. The instrument sits on a mobile cart. A total of 5 motion-control stages are built into the system for XYZ and rotational degrees of freedom for sample positioning; the fifth stage fine tunes the focal distance between the camera and the scintillator to achieve on-line focusing. A Python code with a user-friendly graphical user interface controls the fully automated image acquisition, not requiring user interaction, yet facilitating tracking of the image acquisition. A complete fast neutron computed tomography dataset with 360 projections requires less than 3 h, with 30 s per projection. On-line focusing is accomplished with a commercial, off-the-shelf, dielectrically actuated liquid lens. Finally, tomographic reconstructions are visualized using the Livermore Tomography Tools software package. The effective pixel size (width and height) is ≈0.1058 mm, yielding a minimum voxel size of 0.1058 × 0.1058 × 0.1058 mm3, and produces a spatial resolution of 231 μm when calculated from knife-edge measurements.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113702"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458363","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: 1

Monitoring of the heavy-ion beam distribution using poly- and monochromatic x-ray fluorescence imaging. 用多色和单色x射线荧光成像监测重离子束分布。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0082932

Ş Zähter, O N Rosmej, P Beloiu, A Bogdanov, A Golubev, M Gyrdymov, J Jacoby, A Kantsyrev, R Loetzsch, M Nicolai, V Panyushkin, A Skobliakov, P M Tavana, I Uschmann, N Zahn, C Spielmann

{"title":"Monitoring of the heavy-ion beam distribution using poly- and monochromatic x-ray fluorescence imaging.","authors":"Ş Zähter, O N Rosmej, P Beloiu, A Bogdanov, A Golubev, M Gyrdymov, J Jacoby, A Kantsyrev, R Loetzsch, M Nicolai, V Panyushkin, A Skobliakov, P M Tavana, I Uschmann, N Zahn, C Spielmann","doi":"10.1063/5.0082932","DOIUrl":"https://doi.org/10.1063/5.0082932","url":null,"abstract":"In this work, the first proof of the principal of an in situ diagnostics of the heavy-ion beam intensity distribution in irradiation of solid targets is proposed. In this scheme, x-ray fluorescence that occurs in the interaction of heavy-ions with target atoms is used for imaging purposes. The x-ray conversion to optical radiation and a transport-system was developed, and its first test was performed in experiments at the Universal Linear Accelerator in Darmstadt, Germany. The Au-beam intensity distribution on thin foils and Cu-mesh targets was imaged using multiple x-ray pinholes (polychromatic imaging) and 2D monochromatic imaging of Cu Kα radiation by using a toroidally bent silicon crystal. The presented results are of importance for application in experiments on the investigation of the equation of states of high energy density matter using high intensity GeV/u heavy-ion beams of ≥1010 particles/100 ns.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113301"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458481","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

Efficiently loading ⁴⁰Ca⁺-²⁷Al⁺ ion crystal using sympathetic cooling and pulsed laser ablation. 利用交感冷却和脉冲激光烧蚀技术高效加载40Ca+-27Al+离子晶体。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0109260

Chenglong Sun, Kaifeng Cui, Sijia Chao, Yuanfei Wei, Jinbo Yuan, Jian Cao, Hualin Shu, Xueren Huang

{"title":"Efficiently loading 40Ca+-27Al+ ion crystal using sympathetic cooling and pulsed laser ablation.","authors":"Chenglong Sun, Kaifeng Cui, Sijia Chao, Yuanfei Wei, Jinbo Yuan, Jian Cao, Hualin Shu, Xueren Huang","doi":"10.1063/5.0109260","DOIUrl":"https://doi.org/10.1063/5.0109260","url":null,"abstract":"We demonstrate a method to efficiently load a pair of 40Ca+-27Al+ ion crystals with sympathetic cooling and pulsed laser ablation, serving as a starting step for the 27Al+ clock. We achieved a technique to rapidly detect the loading of hot ions by monitoring the 2S1/2 → 2D5/2 narrow transition of 40Ca+ that couples to the shared motional modes between the two ions. The sympathetic cooling time of the 40Ca+-27Al+ ion pair is measured. Two traps are employed to compare the loading time from two directions and it was found that the loading from the axial direction takes much shorter time than loading from the radial direction of the trap. With the help of adaptively controlled trap potential, our method reduced the average loading time of a 40Ca+-27Al+ pair from 26 to 1 min. This research is an important step for increasing the uptime ratio of the 27Al+ optical clock and is useful for other mixed-species ion crystals based on sympathetic cooling.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113201"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458482","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

The measurement of photocathode transverse energy distribution curves (TEDCs) using the transverse energy spread spectrometer (TESS) experimental system. 利用横向能量展谱仪(TESS)实验系统测量了光电阴极横向能量分布曲线(TEDCs)。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0109053

L B Jones, D P Juarez-Lopez, H E Scheibler, A S Terekhov, B L Militsyn, C P Welsch, T C Q Noakes

{"title":"The measurement of photocathode transverse energy distribution curves (TEDCs) using the transverse energy spread spectrometer (TESS) experimental system.","authors":"L B Jones, D P Juarez-Lopez, H E Scheibler, A S Terekhov, B L Militsyn, C P Welsch, T C Q Noakes","doi":"10.1063/5.0109053","DOIUrl":"https://doi.org/10.1063/5.0109053","url":null,"abstract":"The minimum achievable particle beam emittance in an electron accelerator depends strongly on the intrinsic emittance of the photocathode electron source. This is measurable as the mean longitudinal and transverse energy spreads in the photoemitted electron beam (MLE and MTE respectively); consequently, MLE and MTE are notable figures of merit for photocathodes used as electron sources in particle accelerators. The overall energy spread is defined by the sum of the MTE and the MLE, and the minimization of MTE is crucial to reduce emittance and thus generate a high-brightness electron beam. Reducing the electron beam emittance in an accelerator that drives a Free-Electron Laser (FEL) delivers a significant reduction in the saturation length for an x-ray FEL, thus reducing the machine's construction footprint and operating costs while increasing the x-ray beam brightness. The ability to measure the transverse energy distribution curve of photoelectrons emitted from a photocathode is a key enabler in photocathode research and development that has prompted the Accelerator Science and Technology Centre (ASTeC) at the STFC Daresbury Laboratory to develop the Transverse Energy Spread Spectrometer to make these crucial measurements. We present details of the design for the upgraded TESS instrument with measured data for copper (100), (110), and (111) single-crystal photocathodes illuminated at UV wavelengths around 266 nm.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"113314"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458830","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: 1

A two-variable control and optimization method for imbalance of high pressure compressor based on improved genetic algorithm. 一种基于改进遗传算法的高压压缩机不平衡双变量控制优化方法。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0109697

Chuanzhi Sun, Qing Lu, Yinchu Wang, Yongmeng Liu, Jiubin Tan

{"title":"A two-variable control and optimization method for imbalance of high pressure compressor based on improved genetic algorithm.","authors":"Chuanzhi Sun, Qing Lu, Yinchu Wang, Yongmeng Liu, Jiubin Tan","doi":"10.1063/5.0109697","DOIUrl":"https://doi.org/10.1063/5.0109697","url":null,"abstract":"To solve the problem of low quality rate for one-time assembly of high-pressure compressors, an improved genetic algorithm (GA) is used to adjust and optimize the imbalance after assembly. This paper takes the post-assembly imbalance of a multi-stage rotor of a high-pressure compressor as the objective function, to reduce the post-assembly imbalance by adjusting the arrangement order of rotor blades and the assembly phase between rotors. We used a four-sector staggered distribution method to generate high-quality initial populations and added an elite retention strategy. The crossover and mutation probabilities are adaptively adjusted according to the fitness function values. The threshold termination condition is added to make the algorithm converge quickly so as to achieve fast, stable, and efficient search. The simulation results show that the imbalance is reduced by 99.46% by using the improved genetic algorithm, which is better than the traditional GA. The experimental results show that the imbalance of the two correction surfaces can be reduced to 640 and 760 g·mm, respectively, which is 86.7% and 87.1% better than the zero-degree assembly.","PeriodicalId":519534,"journal":{"name":"The Review of scientific instruments","volume":" ","pages":"115106"},"PeriodicalIF":1.6,"publicationDate":"2022-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40458897","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: 1

Flower-like disk resonator for gyroscopic application. 陀螺仪用花状圆盘谐振器。

IF 1.6

The Review of scientific instruments Pub Date : 2022-11-01 DOI: 10.1063/5.0100376

Liutao Gu, Weiping Zhang, Haolin Lu, Yuting Wu, Chongyang Fan

引用次数: 2