Review of Scientific Instruments最新文献_第6页

Design of a wide-energy-range nano-focus and high-resolution soft x-ray beamline. 宽能量范围纳米聚焦和高分辨率软x射线光束线的设计。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0259907

Y B Shi, L Tang, J H He

引用次数: 0

Long-wave infrared hyperspectral imager based on a scanning Fabry-Pérot interferometer. 基于扫描法布里-普氏干涉仪的长波红外高光谱成像仪。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0242417

Mads Nibe Larsen, Anders Løchte Jørgensen, Victor Petrunin, Jakob Kjelstrup-Hansen, Bjarke Jørgensen

引用次数: 0

Broadband coherent anti-Stokes Raman scattering (BCARS) microscopy for rapid, label-free biological imaging. 宽带相干抗斯托克斯拉曼散射（BCARS）显微镜快速，无标记的生物成像。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0253841

Jessica Z Dixon, Wei-Wen Chen, Haoyu Xu, Xavier Audier, Marcus T Cicerone

{"title":"Broadband coherent anti-Stokes Raman scattering (BCARS) microscopy for rapid, label-free biological imaging.","authors":"Jessica Z Dixon, Wei-Wen Chen, Haoyu Xu, Xavier Audier, Marcus T Cicerone","doi":"10.1063/5.0253841","DOIUrl":"https://doi.org/10.1063/5.0253841","url":null,"abstract":"Broadband coherent anti-Stokes Raman scattering (BCARS) microscopy is a label-free imaging approach that provides detailed chemical information at high spatial resolution in a sample through nonlinear, coherent excitation of molecular vibrations and detection of Raman spectra. While its utility for biological imaging has been demonstrated, many aspects of this technique must mature before it can be widely adopted. One of the areas of required improvement is imaging speed-most BCARS implementations involve sample rastering, which limits imaging speed. Beam scanning can provide faster BCARS imaging but presents some unique challenges. Here, we describe a beam-scanning BCARS microscopy system that improves spatial resolution twofold and imaging speed by fivefold over a previous beam-scanning implementation. These enhancements were enabled by an improvement in supercontinuum power and the use of a sCMOS camera for its high data transfer rate and low read noise. Implementation of the sCMOS camera required correction for the significant pixel-to-pixel background and photon response nonuniformity. We report on the method that we implemented for calibrating and correcting the pixel-to-pixel differences in sCMOS camera noise.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12021446/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144043537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automated polarization rotation for multi-axis rotational-anisotropy second harmonic generation experiments. 用于多轴旋转各向异性二次谐波发生实验的自动偏振旋转。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0233827

Karna A Morey, Bryan T Fichera, Baiqing Lv, Zonqi Shen, Nuh Gedik

{"title":"Automated polarization rotation for multi-axis rotational-anisotropy second harmonic generation experiments.","authors":"Karna A Morey, Bryan T Fichera, Baiqing Lv, Zonqi Shen, Nuh Gedik","doi":"10.1063/5.0233827","DOIUrl":"https://doi.org/10.1063/5.0233827","url":null,"abstract":"Rotational anisotropy second harmonic generation (RA-SHG) is a nonlinear optical technique used to probe the symmetry of condensed matter systems. Measuring the dependence of the SHG susceptibility on one or more external parameters, notably strain, field, temperature, or time delay, is an extremely powerful way to probe complex phases of quantum materials. Experimentally, extracting maximal information about the SHG susceptibility tensor requires measurements of S and P polarized input and output combinations, which naturally involves the rotation of the polarizers during data collection. For multi-axis experiments, this has proved challenging since polarization rotation is typically done manually. Automating this process eliminates labor constraints, reduces uncertainty due to low-frequency noise, and expands the type of multi-axis datasets that can be collected; however, it is difficult due to geometrical constraints within the setup. In this work, we design and implement low-cost, high-fidelity automated polarization rotators for use in multi-axis RA-SHG. These polarization rotators utilize an electrical slip ring to transfer power to the rotating RA-SHG optical setup as well as a miniature stepper motor to perform the polarization rotation. We demonstrate this automated system in time-resolved RA-SHG measurements in the non-centrosymmetric semiconductor GaAs. For the multi-axis measurements described above, this automated system permits data averaging over longer periods, vastly expedites data collection, and expands the setup measurement capability. This ultimately opens new frontiers in probing quantum materials using multiple tunable external parameters.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143780208","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 control method for micro-gyroscopes using self-excitation and frequency measurement techniques. 利用自激和频率测量技术开发微陀螺仪控制方法。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0245317

Xin Liu, Peng Sun, Yinyu Liu, Zhaoli Wei, Quanfeng Zhou

{"title":"Development of a control method for micro-gyroscopes using self-excitation and frequency measurement techniques.","authors":"Xin Liu, Peng Sun, Yinyu Liu, Zhaoli Wei, Quanfeng Zhou","doi":"10.1063/5.0245317","DOIUrl":"https://doi.org/10.1063/5.0245317","url":null,"abstract":"Micro-Hemispherical Resonator Gyroscopes (MHRGs) serve as essential components in inertial navigation systems. This research introduces a novel digital closed-loop control system for the application of the force-to-rebalance mode. The proposed methodology utilizes a self-excitation technique to initiate oscillation. First, the amplitude of the oscillatory signal detected by the Analog-to-Digital Converter (ADC) is calculated. This amplitude is subsequently amplified by a predetermined factor and multiplied with the ADC-detected signal. The resultant product serves as the input for the digital-to-analog converter, facilitating the generation of a drive signal for the MRHG. Upon the oscillation amplitude attaining a specified threshold, the control system transitions the drive control to the Direct Digital Synthesis (DDS) module. Concurrently, we employ a high-frequency clock to measure the frequency of the ADC sampling signal. The measured frequency is then used to establish a reference frequency range for the Proportional-Integral-Derivative (PID) controller, with the aim of expediting the convergence speed. Finally, a PID block based on the standard IEEE-754 floating-point format is implemented to perform fine-grained adjustment of the DDS frequency control word. Experimental results demonstrate that the amplitude control shows a variation of ±1% with respect to the reference value. For MHRGs with different Q factors and resonant frequencies, the phase error between the drive and detection signals is maintained within ±0.5°.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143780560","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

Study on the influence of topological structures and soft magnetic materials on the performance of high-speed motors. 拓扑结构和软磁材料对高速电机性能影响的研究。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0253337

Qingyi Kong, Xinhua Zhou, Ye Rong, Xuan Wang, Leizhao Geng, Qiaomei Yang

引用次数: 0

Compact 3He gas polarizers based on metastability-exchange optical pumping. 基于亚稳交换光泵浦的紧凑3He气体偏振器。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0255436

Pierre-Jean Nacher, Cavin Talbot, Hadi Loutfi, Katarzyna Suchanek, Ze-Yuan Zhang, Geneviève Tastevin

{"title":"Compact 3He gas polarizers based on metastability-exchange optical pumping.","authors":"Pierre-Jean Nacher, Cavin Talbot, Hadi Loutfi, Katarzyna Suchanek, Ze-Yuan Zhang, Geneviève Tastevin","doi":"10.1063/5.0255436","DOIUrl":"https://doi.org/10.1063/5.0255436","url":null,"abstract":"We describe the design, construction, and operation of polarizers able to deliver 3He gas with high nuclear polarization to external volumes in a very flexible way. They combine metastability-exchange optical pumping, the only method that can rapidly polarize 3He nuclei (at pressures in the millibar range) and peristaltic compression, which is used to transfer optically polarized gas to storage volumes or experimental cells. Two experimental polarizing systems are described: a minimal compact portable system and a larger laboratory system fully equipped for gas polarization measurements. Models combining gas flow, diffusion, and nuclear relaxation are derived to evaluate the combined effects of the key processes potentially limiting the performance of generic polarizing systems. They are used to discuss several design parameters of our polarizers and to interpret our experimental observations. Key results obtained with our systems for different applications are reported. Typical 3He gas polarization values M = 0.4-0.6 following initial compression to more than 600 mbar with flow rates up to 5 standard cubic centimeters per minute are demonstrated.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144045352","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

Robust monitoring of thermal and fast ions using collective Thomson scattering: Combining physics- and data-driven background estimation. 利用集体汤姆逊散射对热离子和快离子的稳健监测：结合物理和数据驱动的背景估计。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0238948

T Verdier, J Rasmussen, J Stober, S K Nielsen

{"title":"Robust monitoring of thermal and fast ions using collective Thomson scattering: Combining physics- and data-driven background estimation.","authors":"T Verdier, J Rasmussen, J Stober, S K Nielsen","doi":"10.1063/5.0238948","DOIUrl":"https://doi.org/10.1063/5.0238948","url":null,"abstract":"Isolating a signal of interest from multivariate time-series is of interest for many scientific purposes. An example is the monitoring of thermal- and fast-ion dynamics with fusion plasma diagnostics such as collective Thomson scattering (CTS), which requires careful characterization of an often highly dynamic diagnostic background. Here, we develop and evaluate new CTS background estimation methods inspired by both physics-based approaches and electroencephalogram signal processing. To apply these, we present, for the first time, CTS data from the ASDEX Upgrade (AUG) fusion device taken using rapid (∼5 kHz) on-pulse power modulation of the CTS probe gyrotron. We find that the best performing method is a physics-informed principal component analysis, yielding a typical error on the background estimate of ∼0.5 eV, a factor of ∼3 improvement compared to simpler techniques. We show that this enables CTS-based thermal- and fast-ion monitoring at AUG on the basis of individual 2-ms acquisition pulses, even in the presence of otherwise deleterious edge-localized modes. It also allows accurate tracking of the evolution of CTS spectra across changes in fast-ion heating schemes, in excellent agreement with theoretical expectations. Furthermore, we apply synthetic CTS signals to demonstrate the benefits of rapidly modulating the CTS probe gyrotron power for improved background subtraction. This predicts more accurate estimates for higher modulation amplitude, frequency, and on-pulse duration and may serve as a basis for novel recommendations for the operation of existing and future CTS diagnostics.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144031859","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 accessible instrument for measuring soft material mechanical properties. 一种易于使用的测量软材料机械性能的仪器。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0247364

B M Unikewicz, A M Pincot, T Cohen

{"title":"An accessible instrument for measuring soft material mechanical properties.","authors":"B M Unikewicz, A M Pincot, T Cohen","doi":"10.1063/5.0247364","DOIUrl":"https://doi.org/10.1063/5.0247364","url":null,"abstract":"Soft material research has seen significant growth in recent years, with emerging applications in robotics, electronics, and healthcare diagnostics where understanding the material mechanical response is crucial for precision design. Traditional methods for measuring nonlinear mechanical properties of soft materials require specially sized samples that are extracted from their natural environment to be mounted on the testing instrument. This has been shown to compromise data accuracy and precision in various soft and biological materials. To overcome this, the Volume Controlled Cavity Expansion (VCCE) method was developed. This technique tests soft materials by controlling the formation rate of a liquid cavity inside the materials at the tip of an injection needle and simultaneously measuring the resisting pressure that describes the material response. Despite VCCE's early successes, expansion of its application beyond academia has been hindered by cost, size, and expertise. In response to this, the first portable, benchtop instrument utilizing VCCE is presented here. This device, built with affordable, readily available components and open-source software, streamlines VCCE experimentation without sacrificing performance or precision. It is especially suitable for space-limited settings and designed for use by non-experts, promoting widespread adoption. The instrument's efficacy was demonstrated through testing polydimethylsiloxane samples of varying stiffness. This study not only validates instrument performance but also sets the stage for further advancements and broader applications in soft material testing. All data, along with acquisition, control, and post-processing scripts, are made available on GitHub.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 4","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144029154","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 sub-nanosecond pulse generator and its beam experiments. 亚纳秒脉冲发生器的研制及其光束实验。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-04-01 DOI: 10.1063/5.0251627

Chunyu Xu, Fenglei Shang, Lei Shang, Zhigang He, Wenbin Song

引用次数: 0