Journal of the Optical Society of America and Review of Scientific Instruments最新文献_第3页

Activation characterization of a novel quinary alloy Ti-Zr-V-Hf-Nb non-evaporable getters by x-ray photoelectron spectroscopy. 新型五元合金Ti-Zr-V-Hf-Nb不可蒸发吸收剂的x射线光电子能谱活化表征。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0079537

Jie Wang, Yong Gao, Yaocheng Hu, Jing Zhang, Z. You, Q. Sun, Q. Si, Zhanglian Xu, Sheng Wang, Guoming Liu, Aijun Mi

{"title":"Activation characterization of a novel quinary alloy Ti-Zr-V-Hf-Nb non-evaporable getters by x-ray photoelectron spectroscopy.","authors":"Jie Wang, Yong Gao, Yaocheng Hu, Jing Zhang, Z. You, Q. Sun, Q. Si, Zhanglian Xu, Sheng Wang, Guoming Liu, Aijun Mi","doi":"10.1063/5.0079537","DOIUrl":"https://doi.org/10.1063/5.0079537","url":null,"abstract":"The first results on the activation process and mechanisms of novel quinary alloy Ti-Zr-V-Hf-Nb non-evaporable getter (NEG) film coatings with copper substrates were presented. About 1.075 µm of Ti-Zr-V-Hf-Nb NEG film coating was deposited on the copper substrates by using the DC sputtering method. The NEG activation at 100, 150, and 180 °C, respectively, for 2 h was in situ characterized by x-ray photoelectron spectroscopy (XPS). The as-deposited NEG film mainly comprised the high valence state metallic oxides and the sub-oxides, as well as a small number of metals. The in situ XPS studies indicated that the concentrations of the high-oxidized states of Ti, Zr, V, Hf, and Nb gradually decreased and that of the lower valence metallic oxides and metallic states increased in steps, when the activation temperature increased from 100 to 180 °C. This outcome manifested that these novel quinary alloy Ti-Zr-V-Hf-Nb NEG film coatings could be activated and used for producing ultra-high vacuum.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"80 1","pages":"053906"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83865637","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

Applicability of the single-layer flat-coil-oscillator technology-based vibration and vibro-acoustic sensors in medical and biological study of the cardiovascular system: Advantages and perspectives of the carotid pulse wave registration. 基于单层扁平线圈振荡器技术的振动和振动声传感器在心血管系统医学和生物学研究中的适用性:颈动脉脉搏波配准的优势和前景。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0076197

S. Gevorgyan, A. Khachunts, G. Gevorgyan, A. A. Tumanian, N. Tadevosyan

{"title":"Applicability of the single-layer flat-coil-oscillator technology-based vibration and vibro-acoustic sensors in medical and biological study of the cardiovascular system: Advantages and perspectives of the carotid pulse wave registration.","authors":"S. Gevorgyan, A. Khachunts, G. Gevorgyan, A. A. Tumanian, N. Tadevosyan","doi":"10.1063/5.0076197","DOIUrl":"https://doi.org/10.1063/5.0076197","url":null,"abstract":"The possibility and feasibility of using the single-layer flat-coil-oscillator (SFCO) technology-based vibration and vibro-acoustic sensors in diagnostic devices and biomedical studies of the cardiovascular system are discussed in this paper. Using an example of recording pulse waves of left carotid artery and their analysis, the information content of the data recorded by these sensors in a number of cases is shown-assessment of age-related changes in the stiffness of the vascular wall, assessment of the dynamics of systolic volume, reflecting myocardial contractility, and rhythm disturbance (extra-systole and arrhythmia). These sensors are shown to be promising in recording heart sounds due to their high sensitivity. The possibility of assessing the dynamics of relaxation of the cardiovascular system after exercise (stress test) is shown. The advantages of using SFCO vibration and vibro-acoustic sensors are high sensitivity, ease of use, and no need to train specialists. These advantages open new perspectives for their implementation in mobile wearable \"smart\" devices for individual monitoring.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"3 1","pages":"054109"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89884205","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: 2

An angular-resolved scattered-light diagnostic for laser-plasma instability studies. 激光等离子体不稳定性研究的角分辨散射光诊断。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0090841

X. Zhao, X. Yuan, J. Zheng, Y. Dong, K. Glize, Y. Zhang, Z. Zhang, J. Zhang

引用次数: 1

Discharge characteristics of steady-state high-density plasma source based on cascade arc discharge with hollow cathode. 基于空心阴极梯级电弧放电的稳态高密度等离子体放电特性。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0076388

K. Yamasaki, O. Yanagi, Y. Sunada, K. Hatta, R. Shigesada, M. Sumino, T. Yamaguchi, Md. Anwarul Islam, N. Tamura, H. Okuno, S. Namba

{"title":"Discharge characteristics of steady-state high-density plasma source based on cascade arc discharge with hollow cathode.","authors":"K. Yamasaki, O. Yanagi, Y. Sunada, K. Hatta, R. Shigesada, M. Sumino, T. Yamaguchi, Md. Anwarul Islam, N. Tamura, H. Okuno, S. Namba","doi":"10.1063/5.0076388","DOIUrl":"https://doi.org/10.1063/5.0076388","url":null,"abstract":"We developed a steady-state high-density plasma source by applying a hollow cathode to a cascade arc discharge device. The hollow cathode is made of a thermionic material (LaB6) to facilitate plasma production inside it. The cascade arc discharge device with the hollow cathode produced a stationary plasma with an electron density of about 1016 cm-3. It was found that the plasma source produces a strong pressure gradient between the gas feed and the vacuum chamber. The plasma source separated the atmospheric pressure (100 kPa) and a vacuum (100 Pa) when the discharge was performed with an argon gas flow rate of 5.0 l/min and a discharge current of 40 A. An analysis of the pressure gradient along the plasma source showed that the pressure difference between the gas feed and the vacuum chamber can be well described by the Hagen-Poiseuille flow equation, indicating that the viscosity of the neutral gas is the dominant factor for producing this pressure gradient. A potential profile analysis suggested that the plasma was mainly heated within cylindrical channels whose inner diameter was 3 mm. This feature and the results of the pressure ratio analysis indicated that the temperature, and, thus, viscosity, of the neutral gas increased with the increasing number of intermediate electrodes. The discharge characteristics and shape of the hollow cathode are suitable for plasma window applications.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"34 1","pages":"053502"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74840852","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: 2

Embedded AI system for interactive vision screen based on human action recognition. 基于人体动作识别的交互式视觉屏幕嵌入式人工智能系统。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0076398

Duan Chi, Wang Zhi, Hao Luo, Fengfa Li, Lianzhong Sun

{"title":"Embedded AI system for interactive vision screen based on human action recognition.","authors":"Duan Chi, Wang Zhi, Hao Luo, Fengfa Li, Lianzhong Sun","doi":"10.1063/5.0076398","DOIUrl":"https://doi.org/10.1063/5.0076398","url":null,"abstract":"In recent years, vision screening has emerged globally for employment (on a yearly basis) within primary and high schools since myopia heavily affects school-aged children. However, this is a laborious and time-consuming task. This article proposes an intelligent system for \"self-service\" vision screening. Individuals can accomplish this task independently-without any assistance by technical staff. The technical solution involved within this platform is human action recognition realized by pose estimation (real-time human joint localization in images, including detection, association, and tracking). The developed system is based on a compact and embedded artificial intelligence platform, aided by a red-green-blue-D sensor for ranging and pose extraction. A set of intuitive upper-limb actions was designed for unambiguous recognition and interaction. The deployment of this intelligent system brings great convenience for large-scale and rapid vision screening. Implementation details were extensively described, and the experimental results demonstrated efficiency for the proposed technique.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"29 1","pages":"054104"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75894576","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 compact x-ray diffraction system for dynamic compression experiments on pulsed-power generators. 用于脉冲发电机动态压缩实验的紧凑x射线衍射系统。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0074467

T. Ao, D. Morgan, B. Stoltzfus, K. Austin, J. Usher, E. Breden, L. Pacheco, S. Dean, J. L. Brown, S. Duwal, H. Fan, P. Kalita, M. Knudson, M. Rodriguez, J. Lane

{"title":"A compact x-ray diffraction system for dynamic compression experiments on pulsed-power generators.","authors":"T. Ao, D. Morgan, B. Stoltzfus, K. Austin, J. Usher, E. Breden, L. Pacheco, S. Dean, J. L. Brown, S. Duwal, H. Fan, P. Kalita, M. Knudson, M. Rodriguez, J. Lane","doi":"10.1063/5.0074467","DOIUrl":"https://doi.org/10.1063/5.0074467","url":null,"abstract":"Pulsed-power generators can produce well-controlled continuous ramp compression of condensed matter for high-pressure equation-of-state studies using the magnetic loading technique. X-ray diffraction (XRD) data from dynamically compressed samples provide direct measurements of the elastic compression of the crystal lattice, onset of plastic flow, strength-strain rate dependence, structural phase transitions, and density of crystal defects, such as dislocations. Here, we present a cost-effective, compact, pulsed x-ray source for XRD measurements on pulsed-power-driven ramp-loaded samples. This combination of magnetically driven ramp compression of materials with a single, short-pulse XRD diagnostic will be a powerful capability for the dynamic materials' community to investigate in situ dynamic phase transitions critical to equation of states. We present results using this new diagnostic to evaluate lattice compression in Zr and Al and to capture signatures of phase transitions in CdS.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"71 1","pages":"053909"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77293668","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: 2

Thomson scattering diagnostic system for the XuanLong-50 experiment. 玄龙50号实验汤姆逊散射诊断系统。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0088785

H. Li, S. J. Li, Q. Xie, J. H. Liu, R. H. Bai, R. Y. Tao, X. Lun, N. Li, X. Bo, C. Liu, L. Han, B. Deng

引用次数: 6

Nanosecond-scale impulse generator for biomedical applications of atmospheric-pressure plasma technology. 大气压等离子体技术生物医学应用的纳秒级脉冲发生器。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0082175

Vladislav Gamaleev, Naohiro Shimizu, M. Hori

引用次数: 2

Calibration and performances of the MicrOmega instrument for the characterization of asteroid Ryugu returned samples. 小行星龙宫返回样品表征MicrOmega仪器的标定与性能研究。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0082456

L. Riu, C. Pilorget, V. Hamm, J. Bibring, C. Lantz, D. Loizeau, R. Brunetto, J. Carter, G. Lequertier, L. Lourit, T. Okada, K. Yogata, K. Hatakeda, A. Nakato, T. Yada

{"title":"Calibration and performances of the MicrOmega instrument for the characterization of asteroid Ryugu returned samples.","authors":"L. Riu, C. Pilorget, V. Hamm, J. Bibring, C. Lantz, D. Loizeau, R. Brunetto, J. Carter, G. Lequertier, L. Lourit, T. Okada, K. Yogata, K. Hatakeda, A. Nakato, T. Yada","doi":"10.1063/5.0082456","DOIUrl":"https://doi.org/10.1063/5.0082456","url":null,"abstract":"MicrOmega, a miniaturized near-infrared hyperspectral microscope, has been selected to characterize in the laboratory the samples returned from Ryugu by the Hayabusa2 mission. MicrOmega has been delivered to the Extraterrestrial Samples Curation Center of the Japanese Aerospace eXploration Agency at the Institute of Space and Astronautical Science in July 2020 and then mounted and calibrated to be ready for the analyses of the samples returned to Earth on December 6, 2020. MicrOmega was designed to analyze the returned samples within a field of view of 5 × 5 mm2 and a spatial sampling of 22.5 µm. It acquires 3D near-infrared hyperspectral image-cubes by imaging the sample with monochromatic images sequentially covering the 0.99-3.65 µm spectral range, with a typical spectral sampling of 20 cm-1. This paper reports the calibration processes performed to extract scientific data from these MicrOmega image-cubes. The determination of the instrumental response and the spectral calibration is detailed. We meet or exceed the goals of achieving an accuracy of ∼20% for the absolute reflectance level, 1% for the relative wavelength-to-wavelength reflectance, and <5 nm for the peak position of the detected absorption features. For the nominal measurements of Ryugu samples with MicrOmega/Curation, the instrument performance also reaches a signal-to-noise ratio of >100 over the entire spectral range. By characterizing the entire collection of the returned samples at the microscopic scale, MicrOmega/Curation offers the potential to provide unprecedented insights into the composition and history of their asteroid parent body.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"15 1","pages":"054503"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87844777","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: 5

Design and manufacture of a radiative cooler to measure the subambient cooling effect and cooling power. 一种测量亚环境冷却效果和冷却功率的辐射冷却器的设计与制造。

Journal of the Optical Society of America and Review of Scientific Instruments Pub Date : 2022-05-01 DOI: 10.1063/5.0087494

J. Qin, Zihan Zhang, Yanwen Li, Y. Cai, Hongqiang Zhang, Lianhua Liu, Lijin Xu, Weidong Zhang, Xiao Xue

{"title":"Design and manufacture of a radiative cooler to measure the subambient cooling effect and cooling power.","authors":"J. Qin, Zihan Zhang, Yanwen Li, Y. Cai, Hongqiang Zhang, Lianhua Liu, Lijin Xu, Weidong Zhang, Xiao Xue","doi":"10.1063/5.0087494","DOIUrl":"https://doi.org/10.1063/5.0087494","url":null,"abstract":"The obscure theory of passive subambient daytime radiative cooling (PSDRC) was deduced in a more understandable way using an arithmetic formula rather than integro-differential equations. Based on two boundary conditions of the equations, an innovative radiative cooler was successfully developed to qualitatively observe PSDRC phenomena and quantitatively characterize the cooling effect and cooling power of radiative cooling coatings (RC coatings). The remarkable subambient temperature reduction over 4.0 °C was successfully achieved in a completely open environment without minimizing the parasitic conduction and convection from the ambient. Prominent PSDRC phenomena could even be observed in such an open environment on very cloudy days, which generally compromise the RC. A much more prominent subambient cooling depression of 10.0 °C was observed when a wind shield was employed to minimize the convection. With suppression of convection, the subambient daytime cooling effect on cloudy days was even more noticeable than that occurred on clear sunny days. The subambient cooling effect was still very remarkable even on clear sunny days in the winter. The average cooling power measured on a clear sunny day was 154.8 ± 9.7 W/m2, corresponding to an average solar irradiance of 680 ± 90 W/m2 with a peak value of ∼820 W/m2. Both the subambient RC effect and the cooling power measured under real weather conditions using the radiative cooler agreed excellently with the theoretical prediction, sufficiently demonstrating the great innovation, validity, and effectiveness of the device.","PeriodicalId":54761,"journal":{"name":"Journal of the Optical Society of America and Review of Scientific Instruments","volume":"53 2 1","pages":"054901"},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90809372","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