Review of Scientific Instruments最新文献_第5页

Switching, amplifying, and chirping diode lasers with current pulses for high bandwidth quantum technologies.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0230870

Gianni Buser

{"title":"Switching, amplifying, and chirping diode lasers with current pulses for high bandwidth quantum technologies.","authors":"Gianni Buser","doi":"10.1063/5.0230870","DOIUrl":"https://doi.org/10.1063/5.0230870","url":null,"abstract":"A series of simple and low-cost devices for switching, amplifying, and chirping diode lasers based on current modulation are presented. Direct modulation of diode laser currents is rarely sufficient to establish precise amplitude and phase control over light, as its effects on these parameters are not independent. These devices overcome this limitation by exploiting amplifier saturation and dramatically outperform commonly used external modulators in key figures of merit for quantum technological applications. Semiconductor optical amplifiers operated on either rubidium D line are recast as intensity switches and shown to achieve ON:OFF ratios >106 in as little as 50 ns. Current is switched to a 795 nm wavelength (Rb D1) tapered amplifier to produce optical pulses of few nanosecond duration and peak powers of 3 W at a similar extinction ratio. Fast rf pulses are applied directly to a laser diode to shift its emission frequency by up to 300 MHz in either direction and at a maximum chirp rate of 150 MHz ns-1. Finally, the latter components are combined, yielding a system that produces watt-level optical pulses with arbitrary frequency chirps in the given range and <2% residual intensity variation, all within 65 ns upon asynchronous demand. Such systems have broad application in atomic, molecular, and optical physics and are of particular interest to fast experiments simultaneously requiring high power and low noise, for example, quantum memory experiments with atomic vapors.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142771955","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

Quantitative radiography for determining density fluctuations in HED experiments.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0215362

E C Merritt, F W Doss, J M Levesque, A M Rasmus, T Desjardins, C A Di Stefano, K A Flippo, D W Schmidt

{"title":"Quantitative radiography for determining density fluctuations in HED experiments.","authors":"E C Merritt, F W Doss, J M Levesque, A M Rasmus, T Desjardins, C A Di Stefano, K A Flippo, D W Schmidt","doi":"10.1063/5.0215362","DOIUrl":"https://doi.org/10.1063/5.0215362","url":null,"abstract":"We have developed a method to extract density fluctuation measurements from x-ray radiographs of high-energy density (HED) instability growth and turbulence experiments. We use this information to calculate density fluctuation statistics for constraining the performance of turbulent mix models in HED systems. The density calculation combines image filtering, removal of systemic effects such as backlighter variation, calculation of transmission across multiple materials, and use of tracer materials to generate an approximate single-material density field. From the density map, we calculate both average density and a variance-like moment b (density-specific-volume covariance), which we compare to our models. We infer both quantities from a single image, which is significantly more information than the historic single scalar mix width measurements. We also develop a method of analyzing simulation outputs that incorporate both the density fluctuation metric from a turbulence model and the bulk material maps from the hydrodynamic code. This analysis helps address the question of how to initialize the simulations for best comparison to data from systems with large separations of scale in the mixing perturbation initial condition. We find that our data analysis method yields 1D average density and b curves with similar morphology and amplitudes as those from preliminary simulation comparisons.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142807596","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

High sensitivity direct magnetic field detection based metrology for ultra-thin magnetic films and Li-ion cells.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0240658

Som Shekhar Sharma, K K George Kurian, Dipak Maity, Preeti Yadav, Tharangattu N Narayanan, G Rajalakshmi

引用次数: 0

Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). I. On-ground setup description and characterization.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0226567

Mathieu Vincendon, Pierre Guiot, Benoît Lecomte, Mathieu Condamin, François Poulet, Antoine Arondel, Julien Barbay, John Carter, Simone De Angelis, Cydalise Dumesnil, Gianrico Filacchione, Paolo Haffoud, Jérémie Hansotte, Yves Langevin, Pierre-Louis Mayeur, Giuseppe Piccioni, Cédric Pilorget, Eric Quirico, Sébastien Rodriguez

{"title":"Calibration of MAJIS (Moons And Jupiter Imaging Spectrometer). I. On-ground setup description and characterization.","authors":"Mathieu Vincendon, Pierre Guiot, Benoît Lecomte, Mathieu Condamin, François Poulet, Antoine Arondel, Julien Barbay, John Carter, Simone De Angelis, Cydalise Dumesnil, Gianrico Filacchione, Paolo Haffoud, Jérémie Hansotte, Yves Langevin, Pierre-Louis Mayeur, Giuseppe Piccioni, Cédric Pilorget, Eric Quirico, Sébastien Rodriguez","doi":"10.1063/5.0226567","DOIUrl":"https://doi.org/10.1063/5.0226567","url":null,"abstract":"The visible and infrared Moon And Jupiter Imaging Spectrometer (MAJIS), aboard the JUpiter ICy Moons Explorer (JUICE) spacecraft, will characterize the composition of the surfaces and atmospheres of the Jupiter system. Prior to the launch, a campaign was carried out to obtain the measurements needed to calibrate the instrument. The aim was not only to produce data for the calculation of the radiometric, spectral, and spatial transfer functions but also to evaluate MAJIS performance, such as signal-to-noise ratio and amount of straylight, under near-flight conditions. Here, we first describe the setup implemented to obtain these measurements, based on five optical channels. We notably emphasize the concepts used to mitigate thermal infrared emissions generated at ambient temperatures, since the MAJIS spectral range extends up to 5.6 µm. Then, we characterize the performance of the setup by detailing the validation measurements obtained before the campaign. In particular, the radiometric, geometric, and spectral properties of the setup needed for the inversion of collected data and the calculation of the instrument's calibration functions are presented and discussed. Finally, we provide an overview of conducted measurements with MAJIS, and we discuss unforeseen events encountered during the on-ground calibration campaign.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142787001","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

Multi-frame x-ray radiography and image tracking for quantification of expansion in laser-driven tin ejecta microjets. 用于量化激光驱动锡喷射微射流膨胀的多帧 X 射线射线照相术和图像跟踪。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0238425

Yuchen Sun, Joshua Hammons, Daniel Champion, Pinaki Das, Ray Gunawidjaja, Yuelin Li, Adam Schuman, Nicholas Sinclair, Yoshimasa Toyoda, Trevor Willey, Alison M Saunders, Jon H Eggert, Jesse Pino

{"title":"Multi-frame x-ray radiography and image tracking for quantification of expansion in laser-driven tin ejecta microjets.","authors":"Yuchen Sun, Joshua Hammons, Daniel Champion, Pinaki Das, Ray Gunawidjaja, Yuelin Li, Adam Schuman, Nicholas Sinclair, Yoshimasa Toyoda, Trevor Willey, Alison M Saunders, Jon H Eggert, Jesse Pino","doi":"10.1063/5.0238425","DOIUrl":"https://doi.org/10.1063/5.0238425","url":null,"abstract":"One regime of experimental particle-laden flow study involves ejecta microjets-often defined as a stream of micrometer-scale particles generated through shock interaction with a non-uniform surface and generally travel above 1 km/s. In order to capture the change in characteristics as a function of propagation time, we apply a multi-frame x-ray radiography platform to observe and track the jet transport dynamics. A synchrotron x-ray source allows us to perform quantitative analyses and comparisons between the eight images captured by the imaging system. Observation of a single jet through time allows the use of a cross correlation algorithm to independently track various regions within the jet and quantify the jet expansion over time using normalized area and normalized areal density values. Through a comparison with the calculated values of ballistic transport, these findings show less expansion than expected for ballistically transporting particles. This work combines multi-frame synchrotron radiography with image tracking to establish a foundation for future studies on jet transport and particle interaction dynamics.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142819086","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

Bunch-by-bunch position measurement with sub-micron resolution at nanoseconds separation using wideband cavity beam position monitors.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0237532

Liu Yang, Xiaozhong He, Xiaoding Zhang, Kui Zhou, Ping Liu, Yi Liu, Quanhong Long, Hanbin Wang, Qing Tian, Xuming Shen, Dexin Xiao

引用次数: 0

Reconstruction of soft x-ray emission in MAST Upgrade.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0219168

B A Steward, M Cecconello, C Bowman

{"title":"Reconstruction of soft x-ray emission in MAST Upgrade.","authors":"B A Steward, M Cecconello, C Bowman","doi":"10.1063/5.0219168","DOIUrl":"https://doi.org/10.1063/5.0219168","url":null,"abstract":"Understanding the confinement of fast ions is crucial for plasma heating and non-inductive current drive, i.e., for the operation of a fusion reactor. Interactions between fast ions and magnetohydrodynamic instabilities can reduce the performance of fusion reactions. Measuring the spatial shape and amplitude is crucial for constraining numerical modeling of the interaction between fast ions and these instabilities. Soft x rays can be used to study these magnetic instabilities. In particular, SXR tomography is used to reconstruct the two-dimensional profile of the SXR emissivity requiring only line integrated measurements, thus providing the spatial structure of the instabilities. This work presents SXR tomography reconstruction performed on synthetic SXR emissions from the Mega Ampere Spherical Tokamak Upgrade device. The synthetic SXR emissions are derived from time dependent tokamak transport data analysis code (TRANSP/NUBEAM) simulations. Different tomographic reconstruction models are compared, and the effect of two additional fans of intersecting lines of sight on the reconstructions' performances is investigated. The additional intersecting lines of sight greatly improve the accuracy of the reconstructions.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142807707","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

Single cell micro-absorption spectroscopy system with temperature control: System design and spectral analysis. 带温度控制的单细胞微吸收光谱系统：系统设计和光谱分析

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0240029

Yufei Liu, Bo Li, Yue Sun, Changxu Li, Fengya Lu, Zhensheng Zhong, Jinhua Zhou, Yingying Xie, Shengzhao Zhang, Zhen Liang, Mei Zhou

{"title":"Single cell micro-absorption spectroscopy system with temperature control: System design and spectral analysis.","authors":"Yufei Liu, Bo Li, Yue Sun, Changxu Li, Fengya Lu, Zhensheng Zhong, Jinhua Zhou, Yingying Xie, Shengzhao Zhang, Zhen Liang, Mei Zhou","doi":"10.1063/5.0240029","DOIUrl":"https://doi.org/10.1063/5.0240029","url":null,"abstract":"Micro-absorption spectroscopy is a useful tool for studying the biological characteristics of single cells. However, the weak spectral signal, due to low absorption caused by the tiny optical path length of the cell, makes the spectral data noisy and difficult to analyze. This paper describes a device for single-cell microspectroscopy measurement that integrates an optical fiber spectrometer and an image CCD within a microscopic system, allowing for the simultaneous acquisition of morphology information and the absorption spectrum of a single cell. The device utilizes an illumination source driven by modulated current sources instead of constant current sources and the corresponding spectral signal extraction method to reduce noise levels. It also features a transparent temperature-controlled sample chamber for regulating the sample's temperature, as the absorption of cells may change with temperature. Due to the unwanted baseline drift in the spectral signals, a method of analyzing the similarity degree between the measured spectrum and the standard spectrum is proposed to study the characteristic variation of cells. To verify the feasibility of this method, the device was used for the microscopic spectral measurement and analysis of single red blood cells. The results showed that the variation patterns of spectral parameters correspond to the cell's responses to changes in temperature and storage duration.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142802122","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

Probe-type optical fiber sensors for electric field distribution measurement.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0238530

Chen Chen, Xinyu Liang, Yang Li, Zongren Peng, Ping Song, Zheng Sun

{"title":"Probe-type optical fiber sensors for electric field distribution measurement.","authors":"Chen Chen, Xinyu Liang, Yang Li, Zongren Peng, Ping Song, Zheng Sun","doi":"10.1063/5.0238530","DOIUrl":"https://doi.org/10.1063/5.0238530","url":null,"abstract":"This paper reports a compact fiber optical electric field (E-field) sensor aiming for the precise detection of transient E-field distributions. Here, a reflective polarization-reciprocal optical path is proposed, which inherently mitigates the temperature-induced birefringence interference of the electro-optical crystal without the need for additional optical elements, thereby facilitating a reduced-size sensing probe. Furthermore, an adaptive particle swarm optimization (A-PSO) algorithm has been utilized for the first time to optimize the insulation structure of the optical E-field sensor, which significantly suppresses field distortion within the sensing region by 50%. This method addresses the technical gap in optical E-field sensor structure optimization, providing an effective means to improve its spatial resolution. The experimental results demonstrate that the proposed sensor exhibits a broad response frequency range from 50 Hz to 15 MHz, with a sensitivity of 0.675 V/kV cm-1. The proposed sensor successfully monitors the spatial distribution of electric fields in the lightning interception region of a lightning rod, thereby validating its effectiveness.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142771940","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

Measuring anisotropy field of patterned soft magnetic films by anisotropic ferromagnetic resonances.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0231419

Na Li, Fangyuan Zhang, Rongzhi Zhao, Guohao Bo, Ting Lei, Jian Zhang, Xuefeng Zhang

{"title":"Measuring anisotropy field of patterned soft magnetic films by anisotropic ferromagnetic resonances.","authors":"Na Li, Fangyuan Zhang, Rongzhi Zhao, Guohao Bo, Ting Lei, Jian Zhang, Xuefeng Zhang","doi":"10.1063/5.0231419","DOIUrl":"https://doi.org/10.1063/5.0231419","url":null,"abstract":"Patterned magnetic films have been applied widely in communication technology for meeting the development of miniaturization and high frequency. However, there has been some debate about the measuring of the anisotropy field, which is significant for deciding the electromagnetic performance. In the paper, we proposed the measurement of the anisotropy field using anisotropic ferromagnetic resonances in patterned permalloy magnetic films. The anisotropy in patterned permalloy with different magnetic stripe widths can be observed qualitatively by the hysteresis loop along in-plane x and y directions, which induces the anisotropic ferromagnetic resonant behaviors. The anisotropy field can be calculated quantificationally by fitting the Kittel equation when the single resonant peak appears under applied magnetic fields. The values of the anisotropy field obtained by anisotropic ferromagnetic resonances are on the lower side to compare with the ones obtained by the energy difference between easy anis and hard axis. Our results can provide an extra method for measuring the anisotropy field, which can be useful for designing electromagnetic devices and potential applications in next-generation wireless communication.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 12","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142802121","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