Review of Scientific Instruments最新文献_第9页

Improvements to the characterization of Agfa x-ray film for use on opacity spectroscopy diagnostics. 改进用于不透明度光谱诊断的 Agfa X 射线胶片的特性。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0219335

A E Peterson, E C Dutra, C S Conlon, T Cunningham, R F Heeter, J Knauer, R A Knight, K J Moy, G Torres, M S Wallace, T S Perry

引用次数: 0

Demonstration of a container-less method for investigating high-temperature alloy properties using ED-XRD. 利用 ED-XRD 研究高温合金特性的无容器方法演示。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0213480

Frank McKay, Kane Bergeron, Amitava Roy, S Thomas Britt, Michael P SanSoucie, Brandon S Phillips, Jonathan Raush, Phillip T Sprunger

{"title":"Demonstration of a container-less method for investigating high-temperature alloy properties using ED-XRD.","authors":"Frank McKay, Kane Bergeron, Amitava Roy, S Thomas Britt, Michael P SanSoucie, Brandon S Phillips, Jonathan Raush, Phillip T Sprunger","doi":"10.1063/5.0213480","DOIUrl":"https://doi.org/10.1063/5.0213480","url":null,"abstract":"As new alloys are being developed for additive manufacturing (AM) applications, questions related to the temperature-dependent structural and compositional stability of these alloys remain. In this work, the benefits and limitations of a unique method for testing this stability are presented. This system employs the use of polychromatic synchrotron light to perform energy-dispersive x-ray diffraction (ED-XRD) on an electrostatically levitated sample at high temperatures. In comparison with a traditional angular-dispersive setup, the container-less electrostatic levitation method has unique advantages, including quicker acquisition times, simultaneous compositional information through fluorescence emissions, a reduction in background noise, and, importantly, concurrent/subsequent measurement of thermophysical properties. This combined method is ideal for phase transition studies by holding the levitated sample at a stable position and temperature through controlled heating and temperature management. To illustrate these capabilities, we show ED-XRD data of the well-known martensitic phase transition (hcp to bcc) in Ti-6Al-4V. In addition, results from the novel alloy Ni51Cu44Cr5 are presented. This alloy is shown to maintain an fcc structure upon heating. However, the concentration of Cu is reduced at high temperatures, resulting in a decrease in the lattice constant. As concurrent thermophysical properties are probed, these preliminary structure and composition experiments demonstrate the capabilities of this technique to determine the composition-processing-structure-properties of metal alloys for AM.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605121","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

Profiling a pulsed molecular beam with cavity-enhanced absorption spectroscopy. 利用空腔增强吸收光谱分析脉冲分子束。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0227509

Zhuang Liu, Qian-Hao Liu, Cun-Feng Cheng, Shui-Ming Hu

引用次数: 0

Development of a compact and portable diamond-based detection system for dosimetry and microdosimetry in ion beam therapy. 开发用于离子束疗法剂量测定和微剂量测定的紧凑型便携式金刚石检测系统。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0235400

C Verona, A Fabbri, A Fazzi, L Bianchi, V Conte, G Petringa, A Raso, G Verona Rinati

{"title":"Development of a compact and portable diamond-based detection system for dosimetry and microdosimetry in ion beam therapy.","authors":"C Verona, A Fabbri, A Fazzi, L Bianchi, V Conte, G Petringa, A Raso, G Verona Rinati","doi":"10.1063/5.0235400","DOIUrl":"https://doi.org/10.1063/5.0235400","url":null,"abstract":"Ion beam therapy techniques have advanced significantly in the past two decades. However, the development of dosimetric verification methods has lagged. Traditional dosimetry, which offers a macroscopic view of the absorbed dose, fails to address the micrometric-scale stochastic effects crucial for understanding biological responses. To bridge this gap, microdosimeters are used to assess physical quantities correlated with radiation effects. This work reports on the design and testing of a novel detection system based on synthetic single crystal diamond. The system is capable of simultaneously performing dosimetric and microdosimetric characterizations of clinical ion beams. The detector incorporates two active components configured as diamond Schottky diodes, both integrated on a single crystal diamond substrate. In particular, one very small element (sensitive area 0.0078 mm2) was designed to evaluate microdosimetric metrics, while the other large one (sensitive area 4.2 mm2) was designed to measure the absorbed dose to water. Diamond detectors were characterized using the ion beam induced charge (IBIC) technique, employing a 1 MeV protons microbeam. The IBIC map of the diamond detector shows two distinct sensitive areas with quite uniform sensitivity, well contained within the metallic contact regions. Dedicated front-end electronic circuits were designed and implemented for both the dosimetric and microdosimetric signals. These circuits, along with the integrated diamond detector, were embedded in an aluminum waterproof housing to minimize electronic interference. This configuration enables a compact, portable setup compatible with water phantoms. Laboratory tests with alpha particles yielded promising results, demonstrating stable and reproducible responses with a good signal-to-noise ratio.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626910","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 automatic multi-precursor flow-type atomic layer deposition system. 自动多源流式原子层沉积系统。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0222271

Daniel J Rodriguez, Mai A Her, Igor O Usov, D J Safarik, Rommel Jones, Michael G Heidlage, Timothy J Gorey

引用次数: 0

Imaging of permeability defect distribution by electromagnetic tomography with hybrid L1 norm and nuclear norm penalty terms. 利用混合 L1 规范和核规范惩罚项的电磁断层扫描成像渗透性缺陷分布。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0233276

Xianglong Liu, Kun Zhang, Ying Wang, Danyang Li, Huilin Feng

{"title":"Imaging of permeability defect distribution by electromagnetic tomography with hybrid L1 norm and nuclear norm penalty terms.","authors":"Xianglong Liu, Kun Zhang, Ying Wang, Danyang Li, Huilin Feng","doi":"10.1063/5.0233276","DOIUrl":"https://doi.org/10.1063/5.0233276","url":null,"abstract":"Electromagnetic tomography (EMT), with the advantages of being non-contact, non-invasiveness, low cost, simple structure, and fast imaging speed, is a multi-functional tomography technique based on boundary measurement voltages to image the conductivity distribution within the sensing field. EMT is widely used in industrial and biomedical fields. Currently, there are few studies on the application of EMT in magnetic permeability materials, which makes it difficult to obtain high-quality reconstructed images due to its own properties that lead to obvious attenuation of electromagnetic waves during propagation, as well as the ill-posed and ill-conditioned characteristics of EMT. In this paper, a multi-feature objective function integrating L2 norm regularization, L1 norm regularization, and low-rank norm regularization is proposed to solve the challenge of magnetic permeability material imaging. This approach emphasizes the smoothness and sparsity. The split Bregman algorithm is introduced to efficiently solve the proposed objective function by decomposing the complex optimization problem into several simple sub-task iterative schemes. In addition, a nine-coil planar array electromagnetic sensor was developed and a flexible modular EMT system was constructed. We use correlation coefficient and error coefficient as indicators to evaluate the performance of the proposed image reconstruction algorithm. The effectiveness of the proposed method in improving the reconstruction accuracy and robustness is verified through numerical simulations and experiments.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142605208","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

Multifrequency electrical impedance tomography system based on undersampling combined with a fast digital demodulation algorithm. 基于欠采样结合快速数字解调算法的多频率电阻抗断层成像系统。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0231415

Jinzhen Liu, Yapeng Zhou, Hui Xiong, Xiaobin Li, Fangming Shi

{"title":"Multifrequency electrical impedance tomography system based on undersampling combined with a fast digital demodulation algorithm.","authors":"Jinzhen Liu, Yapeng Zhou, Hui Xiong, Xiaobin Li, Fangming Shi","doi":"10.1063/5.0231415","DOIUrl":"https://doi.org/10.1063/5.0231415","url":null,"abstract":"Multifrequency electrical impedance tomography (MFEIT) has shown great application prospects in the field of biomedical imaging. To realize high-precision multifrequency electrical impedance information acquisition, a high-precision MFEIT system with undersampling combined with a fast digital demodulation algorithm is proposed. The system is integrated with 16 electrodes, and semi-parallel acquisition is used. In addition, a novel multifrequency digital demodulation algorithm is applied to enhance the accuracy of multifrequency excitation signal demodulation and achieve rapid demodulation. This improvement is achieved by analyzing the process of the multifrequency digital demodulation algorithm and combining undersampling with a fast digital demodulation technique. To evaluate the proposed method, a systematic comparative experiment is conducted. The experimental results demonstrate that the demodulation error using the undersampling method is less than 0.7% within the frequency range of 5-500 kHz. In addition, the system achieves a maximum signal-to-noise ratio of 62.92 dB, an average blur radius of 0.953, and an average position error percentage of 9.3%. The results indicate that the MFEIT system constructed based on the above research has good performance and a high signal-to-noise ratio.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142688697","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

Additively manufactured plastic plasma spectrometer. 塑料等离子体光谱仪。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0219571

Quetzal Larrick, Craig Pollock, Donald Hampton, Levon Avanov, Daniel Gershman, Denise Thorsen, Greg Shipman, Jesse Atencio, Anthony Melkomukov

{"title":"Additively manufactured plastic plasma spectrometer.","authors":"Quetzal Larrick, Craig Pollock, Donald Hampton, Levon Avanov, Daniel Gershman, Denise Thorsen, Greg Shipman, Jesse Atencio, Anthony Melkomukov","doi":"10.1063/5.0219571","DOIUrl":"10.1063/5.0219571","url":null,"abstract":"We report results in the development and testing of a low resource tophat electrostatic analyzer (ESA) for space plasma measurements. This device has been additively manufactured (3D-printed) using fused deposition modeling. The classic tophat design is composed of four plastic pieces, without any surface coatings. The three conducting electrodes are printed from carbon nanotube infused polyether ether ketone (CNT-PEEK). The fourth piece, an insulating electrode support, uses pure PEEK. This ESA is designed to detect electrons in space from 10 eV up to 30 keV. We demonstrate that the printed CNT-PEEK is sufficiently electrically conductive to support the fast high voltage slewing often required for high time resolution measurements. The plastic ESA has been successfully vibrated beyond standard pre-flight levels, tested under keV electron beam illumination over a wide range of temperatures, and tested under UV illumination, simulating the solar Ly-α flux. In comparison with an identical machined aluminum ESA, our CNT-PEEK ESA provides nominal energy/angle bandpasses, closely matching simulation. These bandpasses imply minimal impact from surface charging at beam energies of 2-3 keV, although more investigation is needed. We also find that the CNT-PEEK ESA provides far superior out-of-band electron rejection and UV photon rejection compared to the machined aluminum ESA. We do not detect any problems with trapped gases or outgassing. This development offers the potential for significant mass savings, implementation of otherwise unattainable geometric configurations, and dramatic simplification in manufacturing and assembly processes required for the development of space plasma instruments.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11581773/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142676740","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

Fabrication of disk ultramicroelectrode using nanoskiving method. 利用纳米剥离法制造圆盘超微电极

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0228902

Yanquan Geng, Hainan Zhao, Yongda Yan, Zhuo Fang, Jiqiang Wang

{"title":"Fabrication of disk ultramicroelectrode using nanoskiving method.","authors":"Yanquan Geng, Hainan Zhao, Yongda Yan, Zhuo Fang, Jiqiang Wang","doi":"10.1063/5.0228902","DOIUrl":"https://doi.org/10.1063/5.0228902","url":null,"abstract":"The detection time of the ultramicroelectrode can be reduced to nanoseconds when compared to the macroscopic electrode, enabling real-time monitoring of the instantaneous electrochemical behavior of the microstructure. Preparing ultramicroelectrode thus has drawn great attention recently. In the present study, a novel method for the preparation of disk ultramicroelectrodes with controllable electrode end sizes based on the nanoskiving method is proposed. The feature dimensions of the ultramicroelectrode can be controlled by the nanoskiving parameters. The electrochemical performance of the prepared ultramicroelectrode is evaluated in the solution system consisting of a 1 mM FcMeOH (ferrocenyl methanol) and 0.1 M KCl aqueous solution. The steady-state limit current deviation rate of the electrode is 7%, and it can work continuously for 600 s. Moreover, the electrode is integrated with micrometer precision scanning and positioning devices, which conduct electrochemical characterization of the micron structure array sample. The electrochemical image of the tin-doped indium oxide sample is measured successfully. The funding in this study provides a novel method to prepare ultramicroelectrodes. Importantly, high-precision electrochemical imaging equipment is established that can be used to measure electrochemical images.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142732003","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

Frequency-domain instrument with custom ASIC for dual-slope near-infrared spectroscopy. 配备定制 ASIC 的频域仪器，用于双斜率近红外光谱分析。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0227363

Alper Kılıç, Giles Blaney, Fatemeh Tavakoli, Jodee Frias, Angelo Sassaroli, Sergio Fantini, Valencia Koomson

{"title":"Frequency-domain instrument with custom ASIC for dual-slope near-infrared spectroscopy.","authors":"Alper Kılıç, Giles Blaney, Fatemeh Tavakoli, Jodee Frias, Angelo Sassaroli, Sergio Fantini, Valencia Koomson","doi":"10.1063/5.0227363","DOIUrl":"10.1063/5.0227363","url":null,"abstract":"Real-time and non-invasive measurements of tissue concentrations of oxyhemoglobin (HbO2) and deoxyhemoglobin (HbR) are invaluable for research and clinical use. Frequency-domain near-infrared spectroscopy (FD-NIRS) enables non-invasive measurement of these chromophore concentrations in human tissue. We present a small form factor, dual-wavelength, miniaturized FD-NIRS instrument for absolute optical measurements, built around a custom application-specific integrated circuit and a dual-slope/self-calibrating (DS/SC) probe. The modulation frequency is 55 MHz, and the heterodyning technique was used for intensity and phase readout, with an acquisition rate of 0.7 Hz. The instrument consists of a 14 × 17 cm2 printed circuit board (PCB), a Raspberry Pi 4, an STM32G491 microcontroller, and the DS/SC probe. The DS/SC approach enables this instrument to be selective to deeper tissue and conduct absolute measurements without calibration. The instrument was initially validated using a tissue-mimicking solid phantom, and upon confirming its suitability for in vivo, a vascular occlusion experiment on a human subject was conducted. For the phantom experiments, an average of 0.08° phase noise and 0.10% standard deviation over the mean for the intensities was measured at a source-detector distance of 35 mm. The absorption and reduced scattering coefficients had average precisions (variation of measurement over time) of 0.5% and 0.9%, respectively, on a window of ten frames. Results from the in vivo experiment yielded the expected increase in HbO2 and HbR concentration for all measurement types tested, namely SC, DS intensity, and DS phase.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"95 11","pages":""},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11585364/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626933","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