Review of Scientific Instruments最新文献

Design, justification, and prototyping of the visible and infrared wide angle viewing system diagnostic for ITER equatorial port 12. 热核实验堆赤道端口 12 的可见光和红外广角观察系统诊断的设计、论证和原型制作。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0234380

S Vives, C Guillon, L Letellier, M H Aumeunier, X Courtois, S Garitta, J Grosy, N Lapcevic, N Lefevre, B Peluso, Y Peneliau, M Medrano, C Pastor, F Mota, V Martin, J Poissy, G Jouffroy, R Lopez Heredero, L M Gonzalez-Fernandez, M Fernandez-Rodríguez, R Garcia-Lopez, M J Zamora, T Belenguer, F Le Guern, J Piqueras, M Fabbri, P Testoni

引用次数: 0

Bidirectional scanning acquisition of inter-satellite laser links for space gravitational wave detection mission. 用于空间引力波探测任务的卫星间激光链路双向扫描采集。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0219215

Xianda Liu, Yunhe Meng

引用次数: 0

Rydberg electromagnetically induced transparency based laser lock to Zeeman sublevels with 0.6 GHz scanning range. 基于雷德贝格电磁感应透明度的激光锁定泽曼子水平，扫描范围为 0.6 千兆赫。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0229024

Alexey Vylegzhanin, Síle Nic Chormaic, Dylan J Brown

{"title":"Rydberg electromagnetically induced transparency based laser lock to Zeeman sublevels with 0.6 GHz scanning range.","authors":"Alexey Vylegzhanin, Síle Nic Chormaic, Dylan J Brown","doi":"10.1063/5.0229024","DOIUrl":"https://doi.org/10.1063/5.0229024","url":null,"abstract":"We propose a technique for frequency locking a laser to the Zeeman sublevel transitions between the 5P3/2 intermediate and 32D5/2 Rydberg states in 87Rb. This method allows for continuous frequency tuning over 0.6 GHz by varying an applied external magnetic field. In the presence of the applied field, the electromagnetically induced transparency (EIT) spectrum of an atomic vapor splits via the Zeeman effect according to the strength of the magnetic field and the polarization of the pump and probe lasers. We show that the 480 nm pump laser, responsible for transitions between the Zeeman sublevels of the intermediate state and the Rydberg state, can be locked to the Zeeman-split EIT peaks. The short-term frequency stability of the laser lock is 0.15 MHz, and the long-term stability is within 0.5 MHz. The linewidth of the laser lock is ∼0.8 and ∼1.8 MHz in the presence and absence of the external magnetic field, respectively. In addition, we show that in the absence of an applied magnetic field and adequate shielding, the frequency shift of the lock point has a peak-to-peak variation of 1.6 MHz depending on the polarization of the pump field, while when locked to Zeeman sublevels, this variation is reduced to 0.6 MHz. The proposed technique is useful for research involving Rydberg atoms, where large continuous tuning of the laser frequency with stable locking is required.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626966","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

Dual-path differential perturbation sand cat swarm optimization algorithm integrated with escape mechanism. 集成逃逸机制的双路径差分扰动沙猫群优化算法。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0222940

Qian Qian, Wentao Luo, Jiawen Pan, Miao Song, Yong Feng, Yingna Li

{"title":"Dual-path differential perturbation sand cat swarm optimization algorithm integrated with escape mechanism.","authors":"Qian Qian, Wentao Luo, Jiawen Pan, Miao Song, Yong Feng, Yingna Li","doi":"10.1063/5.0222940","DOIUrl":"https://doi.org/10.1063/5.0222940","url":null,"abstract":"In this paper, based on the sand cat swarm optimization (SCSO) algorithm, a dual-path differential perturbation sand cat swarm optimization algorithm integrated with escape mechanism (EDSCSO) is proposed. EDSCSO aims to solve the problems of the original SCSO, such as the limited diversity of the population, low efficiency of solving complex functions, and ease of falling into a local optimal solution. First, an escape mechanism was proposed to balance the exploration and exploitation of the algorithm. Second, a random elite cooperative guidance strategy was used to utilize the elite population to guide the general population to improve the convergence speed of the algorithm. Finally, the dual-path differential perturbation strategy is used to continuously perturb the population using two differential variational operators to enrich population diversity. EDSCSO obtained the best average fitness for 27 of 39 test functions in the IEEE CEC2017 and IEEE CEC2019 test suites, indicating that the algorithm is an efficient and feasible solution for complex optimization problems. In addition, EDSCSO is applied to optimize the three-dimensional wireless sensor network coverage as well as the unmanned aerial vehicle path planning problem, and it provides optimal solutions for both problems. The applicability of EDSCSO in real-world optimization scenarios was verified.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142649035","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

Pitch angle and altitude control for unmanned helicopter based on new approximation-free control. 基于新型无近似控制的无人直升机俯仰角和高度控制。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0219636

Haixiang Jiang, Hao Yang, Jian Cen, Xinpan Gou, Yuji Chen

引用次数: 0

Passive shimming of a 3T cryogen-free animal magnetic resonance imaging superconducting magnet with dense shim tray slots and small residual magnetic force. 具有密集垫片托盘槽和较小残余磁力的 3T 无低温动物磁共振成像超导磁体的被动垫片。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0215247

Pengfei Wu, Yaohui Wang, Wenchen Wang, Weimin Wang, Jinhao Liu, Guyue Zhou, Haoran Chen, Hui Wang, Shunzhong Chen, Jinshui Sun, Feng Liu

{"title":"Passive shimming of a 3T cryogen-free animal magnetic resonance imaging superconducting magnet with dense shim tray slots and small residual magnetic force.","authors":"Pengfei Wu, Yaohui Wang, Wenchen Wang, Weimin Wang, Jinhao Liu, Guyue Zhou, Haoran Chen, Hui Wang, Shunzhong Chen, Jinshui Sun, Feng Liu","doi":"10.1063/5.0215247","DOIUrl":"https://doi.org/10.1063/5.0215247","url":null,"abstract":"Passive shimming is widely used in magnetic resonance imaging (MRI) systems due to its excellent efficacy and cost-effectiveness. However, conventional shim tray structures have difficulty in effectively adjusting magnetic field distributions under specific conditions. This limitation can lead to insufficient cancellation of harmonics and result in significant residual forces on the trays, impeding accurate placement of the trays. In this study, instead of using the conventional design of the shim tray slot, we propose a dedicated passive shimming tray tailored for 3T cryogen-free animal MRI superconducting magnets. Passive shimming experiments were conducted to evaluate the performance of this novel design, in which we were able to improve the peak-to-peak magnetic field homogeneity within the 180 mm diameter imaging region, reducing peak-to-peak (p-p) variation from 349.35 ppm to 19.08 ppm. Furthermore, the p-p homogeneity of the magnetic field measured at the imaging area with a diameter of spherical volume (DSV) of 160 mm reached 8.67 ppm. In addition, we strictly controlled the residual magnetic force of the shim tray to ensure its accurate placement. The experimental results indicate that the proposed structural optimization method and the residual magnetic force control strategy show potential in high-field MRI instruments requiring high homogeneity and handling of high residual magnetic force.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626877","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

Donepezil hydrochloride fingerprint spectral and formation mechanism analysis. 盐酸多奈哌齐指纹光谱和形成机理分析。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0225011

Lei Wang, Wenxia Wang, Dongjie Wang, Jinwu Zhao, Liu Sun, Shuocheng She, Pandeng Hou, Yizhu Zhang, Qiuhong Qu, Mingxia He

引用次数: 0

Magnetic force microscopy: High quality-factor two-pass mode. 磁力显微镜：高质量系数双通道模式

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0226633

Christopher Habenschaden, Sibylle Sievers, Alexander Klasen, Andrea Cerreta, Hans Werner Schumacher

{"title":"Magnetic force microscopy: High quality-factor two-pass mode.","authors":"Christopher Habenschaden, Sibylle Sievers, Alexander Klasen, Andrea Cerreta, Hans Werner Schumacher","doi":"10.1063/5.0226633","DOIUrl":"https://doi.org/10.1063/5.0226633","url":null,"abstract":"Magnetic force microscopy (MFM) is a well-established technique in scanning probe microscopy that allows for the imaging of magnetic samples with a spatial resolution of tens of nm and stray fields down to the mT range. The spatial resolution and field sensitivity can be significantly improved by measuring in vacuum conditions. This improvement originates from the higher quality-factor (Q-factor) of the cantilever's oscillation in vacuum compared to ambient conditions. However, while high Q-factors are desirable as they directly enhance the magnetic measurement signal, they pose a challenge when performing standard MFM two-pass (lift) mode measurements. At high Q-factors, amplitude-based topography measurements become impossible, and the MFM phase response behaves non-linearly. Here, we present a modified two-pass mode implementation in a vacuum atomic force microscope that addresses these issues. By controlling the Q-factor in the first pass and using a phase-locked loop technique in the second pass, high Q-factor measurements in vacuum are enabled. Measuring the cantilever's frequency shift instead of the phase shift eliminates the issue of emerging nonlinearities. The improvements in MFM signal-to-noise ratio are demonstrated using a nano-patterned magnetic sample. The elimination of non-linear responses is highlighted through measurements performed on a well-characterized multilayer reference sample. Finally, we discuss a technique that avoids topography-induced artifacts by following the average sample slope. The newly developed, sensitive, and distortion-free high quality-factor two-pass mode has the potential to be widely implemented in commercial setups, facilitating high-resolution MFM measurements and advancing studies of modern magnetic materials.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626872","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

Characterization of a large caliber explosively driven shock tube. 大口径爆炸驱动冲击管的特性。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0213918

Yunfei Mu, Jun Zhang, Mao Yang, Hanjun Huang, Yongjian Mao, Haiying Huang, Xing Zheng

{"title":"Characterization of a large caliber explosively driven shock tube.","authors":"Yunfei Mu, Jun Zhang, Mao Yang, Hanjun Huang, Yongjian Mao, Haiying Huang, Xing Zheng","doi":"10.1063/5.0213918","DOIUrl":"https://doi.org/10.1063/5.0213918","url":null,"abstract":"Research on evaluating weapon systems, building structures, and personnel protection has attracted considerable attention due to the high incidence of blast accidents. The explosively driven shock tube is an affordable and replicable method for investigating high pressure blast waves and extreme shock environments. A newly constructed large caliber explosively driven shock tube with an inner diameter of 2.5 m and a length of 18 m has been documented and characterized in this paper. It is capable of providing a peak pressure of at least 5.49 MPa in the test section with 160 kg of TNT charges. The tube can produce an overpressure that is significantly higher than conventional shock tubes, which expands the capability to simulate a high overpressure blast load. A two-dimensional axisymmetric simulation model has been developed, validated, and calibrated for the characterization of the flow field inside the shock tube. The influence of the charge mass on the overpressure, arrival time, and positive impulse was discussed, and the planarity of the shock wave was also quantitatively characterized. To aid in designing further shock experiments and applications, a physics-based prediction model was developed using the dimensional analysis.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626770","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 studies on electronics and data acquisition of a real time diamond spectrometer for the SPARC neutron camera. 为 SPARC 中子照相机设计研究实时钻石光谱仪的电子器件和数据采集。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0219537

M Petruzzo, A Celora, G Croci, E Gallo, G Gorini, G Grosso, M Nocente, M Parisi, O Putignano, P Raj, D Rigamonti, M Rebai, M Reinke, F Scioscioli, M Tardocchi, L Tedoldi

{"title":"Design studies on electronics and data acquisition of a real time diamond spectrometer for the SPARC neutron camera.","authors":"M Petruzzo, A Celora, G Croci, E Gallo, G Gorini, G Grosso, M Nocente, M Parisi, O Putignano, P Raj, D Rigamonti, M Rebai, M Reinke, F Scioscioli, M Tardocchi, L Tedoldi","doi":"10.1063/5.0219537","DOIUrl":"https://doi.org/10.1063/5.0219537","url":null,"abstract":"The design of a compact 2 × 2 diamond matrix with independent and redundant pixels optimized for the spectrometric neutron camera of the SPARC tokamak is presented in this article. Such a matrix overcomes the constraints in dynamic range posed by the size of a single diamond sensor while keeping the ability to perform energy spectral analysis, marking a significant advancement in tokamak neutron diagnostics. A charge pre-amplifier based on radio frequency amplifiers based on InGaP technology transistors, offering up to 2 GHz bandwidth with high robustness against radiation, has been developed. A first single-channel device has been tested and proven to provide a fast signal development time of 20-25 ns, necessary to mitigate pileup effects while offering precise energy measurements. As the diamond sensors may suffer from polarization effects due to the trapping of charges at the diamond/metal interface, a periodical bias inversion can guarantee optimal performance. To facilitate that, a reversible high voltage power supply has been developed. The ongoing development of data acquisition equipment and real-time processing algorithms based on programmable gate arrays further enhances the neutron camera's capabilities.","PeriodicalId":21111,"journal":{"name":"Review of Scientific Instruments","volume":null,"pages":null},"PeriodicalIF":1.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142626802","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