Review of Scientific Instruments最新文献_第3页

Full-image operation of fast charge exchange recombination spectroscopy with high-spatial and high-wavelength resolutions in large helical device.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-03-01 DOI: 10.1063/5.0251924

T Kobayashi, M Yoshinuma, K Ida

引用次数: 0

Characterization of AlF3-passivated aluminum mirrors using non-contact thermal metrology.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0241547

Andrew H Jones, John T Gaskins, Patrick E Hopkins, Scott G Walton, David R Boris, John P Murphy, Luis V Rodriguez de Marcos, Javier Del Hoyo, Manuel A Quijada

引用次数: 0

Influence of microwave parameters on the xenon afterglow beam currents of a superconducting electron cyclotron resonance ion source.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0251710

L X Li, J B Li, J D Ma, Y C Feng, X Y Wang, X Fang, W Lu, O Tarvainen, L T Sun, H W Zhao

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Transient temperature measurement of electron beam bombarded stainless steel via nanosecond two-color pyrometry.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0215582

T M Watson, J T Mockert, A A Neuber, J C Dickens

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Decision confidence estimation and electroencephalogram features analysis based on animal recognition task.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0240003

Li Li, Yibi Jiang, Peng Zan, Jingwei Yue, Chunyong Li

{"title":"Decision confidence estimation and electroencephalogram features analysis based on animal recognition task.","authors":"Li Li, Yibi Jiang, Peng Zan, Jingwei Yue, Chunyong Li","doi":"10.1063/5.0240003","DOIUrl":"https://doi.org/10.1063/5.0240003","url":null,"abstract":"Human-computer collaboration serves as a high-quality method to achieve optimal decisions in the workplace. However, there are relatively few existing papers that focus on how to effectively aggregate the viewpoints of different individuals. Contemporary research suggests that decision confidence bears a positive correlation with decision accuracy, thereby indicating that it can serve as a weighting parameter for aggregating viewpoints. This paper endeavors to quantitatively estimate decision confidence through the application of electroencephalogram (EEG). In this paper, we designed an animal recognition task to measure different decision confidence levels. The success of the task design was demonstrated by the comparison result of behavioral data and EEG at different confidence levels. In addition, then a neural network called channel attention based thinker-invariant DenseNet was proposed to predict confidence levels, with an average accuracy of 77.84%, higher than the results of existing models. Moreover, the regions of the brain associated with decision confidence, found by visualizing the channel attention module of our model, are consistent with existing studies.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143391652","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

Design and evaluation of a piezoelectric energy harvester using asymmetric clamping to improve output performance.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0235556

Donghao Su, Liang Wang

引用次数: 0

A microfluidic sucrose gap device for electrical measurement of gap junction connectivity.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0224298

J Dungan, J Mathews, M Levin, V Koomson

引用次数: 0

Theoretical study of mode competition including backward wave and experiment on the 28 GHz second harmonic gyrotron.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0240045

Kai Jia, Xinjian Niu, Yinghui Liu, Jianwei Liu, Zongzheng Sun, Hongfu Li

{"title":"Theoretical study of mode competition including backward wave and experiment on the 28 GHz second harmonic gyrotron.","authors":"Kai Jia, Xinjian Niu, Yinghui Liu, Jianwei Liu, Zongzheng Sun, Hongfu Li","doi":"10.1063/5.0240045","DOIUrl":"https://doi.org/10.1063/5.0240045","url":null,"abstract":"The gyrotron operates in the harmonic state, which can significantly reduce the required operating magnetic field but complicates the mode competition problem. In some situations, it is also possible for the backward wave of the fundamental wave mode to be excited to suppress the desired harmonic operating mode. Therefore, a detailed analysis of mode competition is necessary for gyrotrons operating in the harmonic state. This paper presents the theoretical research of mode competition and experimental work for the 28 GHz second harmonic gyrotron at the TE02 mode. Possible mode competition problems are analyzed in detail using the linear theory and the multimode time-dependent non-linear theory. The problem of excitation of the backward wave of the fundamental wave mode TE21, which may be present, is received focused investigation. Ultimately, the possible competition modes are successfully suppressed in the non-linear simulation by setting up a suitable startup scenario, and an interaction efficiency of 32.5% is obtained. Based on the theoretical research results, experimental verification is carried out. When the working voltage is 29.8 kV, the beam current is 1.18 A, and we obtain stable single mode operation of the gyrotron, which has an operation frequency of about 27.96 GHz and an interaction efficiency of about 30.1% from the experiment.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143190397","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

Feasibility validation of piezoelectric actuators under full-ocean-depth pressure conditions: A study based on M-shaped hybrid-mode design.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0240200

Di Chen, Pengpeng Yu, Shiyu Zhang, Anti Zhang, Liang Wang, Jiamei Jin

{"title":"Feasibility validation of piezoelectric actuators under full-ocean-depth pressure conditions: A study based on M-shaped hybrid-mode design.","authors":"Di Chen, Pengpeng Yu, Shiyu Zhang, Anti Zhang, Liang Wang, Jiamei Jin","doi":"10.1063/5.0240200","DOIUrl":"https://doi.org/10.1063/5.0240200","url":null,"abstract":"Due to the extremely high pressures in the deep sea, traditional rigid actuators typically require protective vessels and pressure-compensation systems, leading to complex structures and increased risk of structural failure. The inherent adaptability of piezoelectric excitation and friction-coupling drive to high-pressure environments suggests that, theoretically, piezoelectric actuators can operate in full-ocean-depth pressure conditions with an open, direct-immersion structure without requiring bulky pressure-compensation systems. However, the feasibility of piezoelectric actuators operating in full-ocean-depth pressure environments (0-110 MPa) remains unvalidated. To address this, we designed an M-shaped hybrid-mode piezoelectric actuator to experimentally verify its performance under full-ocean-depth pressure conditions. The actuator's structural dimensions were determined using the finite element method to meet the requirements of frequency degeneracy. We developed a high-pressure water simulation system and measured velocity to evaluate the actuator's performance in simulated full-ocean-depth pressure environments. Our results demonstrate that the actuator prototype operates successfully under pressures up to 110 MPa, equivalent to a depth of 11 000 m, the Earth's deepest point. In addition, the actuator's velocity remains stable across hydrostatic pressures ranging from 0 to 110 MPa. Although our experiments focus on the M-shaped hybrid-mode design, this actuator embodies the core principles of piezoelectric excitation and friction-coupling drive, which are broadly applicable to various piezoelectric actuators. By validating this design, we broaden both the structural configurations and driving mechanisms available for piezoelectric actuators and provide key insights into the feasibility of piezoelectric actuators operating under full-ocean-depth pressure conditions.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143382998","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 1.2 MV high voltage DC power supply with SF6 insulation for an electrostatic tandem proton accelerator in accelerator-based boron neutron capture therapy system.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2025-02-01 DOI: 10.1063/5.0220828

Chawon Park, Minho Kim, Hyunwoo Jung, Seungwoo Park, Bong Hwan Hong

{"title":"Development of a 1.2 MV high voltage DC power supply with SF6 insulation for an electrostatic tandem proton accelerator in accelerator-based boron neutron capture therapy system.","authors":"Chawon Park, Minho Kim, Hyunwoo Jung, Seungwoo Park, Bong Hwan Hong","doi":"10.1063/5.0220828","DOIUrl":"https://doi.org/10.1063/5.0220828","url":null,"abstract":"This paper presents the development of a 1.2 MV high-voltage direct current (DC) power supply with an SF6 insulation for an electrostatic tandem proton accelerator utilized in an accelerator-based boron neutron capture therapy (BNCT) system. BNCT offers a promising alternative to traditional radiation therapy for the treatment of malignant brain tumors, head and neck cancers, and melanomas. The electrostatic tandem proton accelerator system, designed to produce H- ions and subsequently accelerate them to generate protons, represents a significant advancement in medical technology. Key milestones in the process include generating and maintaining a high-voltage DC power supply of 1.2 MV/45 mA for over 30 min, with rigorously testing conducted up to 750 kV/45 mA in ambient conditions. The system features an upgraded Cockcroft-Walton rectifier stage and incorporates a realistic load resistance, with final testing conducted in a tank filled with SF6 gas. Performance tests conducted in atmospheric and SF6 gas environments demonstrate the stable operation of the power supply up to 1.2 MV/45 mA, despite challenges such as corona discharge and electrical arcing in atmospheric environments. It demonstrates excellent long-term voltage and current stability, proving its suitability for tandem proton accelerators by reliably supplying 54 W of power to the dummy load. The developed system can enhance the effectiveness of BNCT systems by generating high-current proton beams, leading to improved treatment outcomes.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":"96 2","pages":""},"PeriodicalIF":1.3,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143414995","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