Review of Scientific Instruments最新文献_第6页

Polar coordinate-based background removal algorithm for 2D x-ray scattering data.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0236066

Pu Guo, Xu Zheng, JiChao Jiang, ShuaiShuai Yin, Chenggong Zhang, Bin Yang, Yitao Cui, Tong Yang, Yueliang Gu, Xiaolong Li, Xingmin Zhang

{"title":"Polar coordinate-based background removal algorithm for 2D x-ray scattering data.","authors":"Pu Guo, Xu Zheng, JiChao Jiang, ShuaiShuai Yin, Chenggong Zhang, Bin Yang, Yitao Cui, Tong Yang, Yueliang Gu, Xiaolong Li, Xingmin Zhang","doi":"10.1063/5.0236066","DOIUrl":"https://doi.org/10.1063/5.0236066","url":null,"abstract":"During the data collection of x-ray diffraction experiments with various detectors, background signals are often unavoidable along with the sample signal. Addressing the background during post-data analysis is not a straightforward task. In this work, we introduced an algorithm specifically designed to handle centrally symmetric two-dimensional x-ray diffraction data and processed the data using the Python programming language. The two-dimensional data are first transformed from Cartesian coordinates to polar coordinates. Second, utilizing existing background processing algorithms, one-dimensional background curves are identified for each azimuth angle. These background data are then merged to generate two-dimensional background data. Finally, by subtracting the background from the original data, we obtain the clear diffraction signal. The algorithm can effectively remove the background from x-ray diffraction data and exhibits the ability to handle backgrounds with high intensity and irregular shapes, and the discernibility of the weak signal is significantly enhanced. Moreover, researchers have the flexibility to choose whether to preserve or eliminate the signals from additional amorphous components based on their needs. This algorithm will provide researchers with the possibility for further data analysis.","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":"142855271","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

Contact force measurement of the compliant gripper based on a force sensing model.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0238161

Yunsong Du, Pengwei Zhang, Tiemin Li

{"title":"Contact force measurement of the compliant gripper based on a force sensing model.","authors":"Yunsong Du, Pengwei Zhang, Tiemin Li","doi":"10.1063/5.0238161","DOIUrl":"https://doi.org/10.1063/5.0238161","url":null,"abstract":"It is challenging for most existing grippers to accurately measure their contact force when grasping unstructured objects. To address this issue, a novel force sensing model is established. A compliant gripper derived by the topology optimization method is introduced, and its actual deformation is measured without contacting by OpenCV. Meanwhile, the hyperelastic constitutive model of flexible materials is further studied by the uniaxial compression test to improve the accuracy of its theoretical deformation. Subsequently, the force sensing model is established based on linear finite element theory and the deep neural network (DNN) algorithm. The nonlinear errors of actual deformation (input layer) and theoretical deformation (output layer) are compensated by the DNN algorithm. This compensated deformation is then input into the linear force sensing model to determine the contact force. Finally, experimental results show that the gripper has a high force sensing accuracy (average error less than 3%) in the middle part. While the force sensing accuracy at the end of the compliant gripper has declined, the contact force measurement of the model in the middle of the new compliant gripper has been effectively verified.","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":"142807522","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

Neutron-induced backgrounds in coaxial cables on the South Pole neutron time-of-flight detector at the National Ignition Facility.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0219568

S Kerr, J Jeet, E Mariscal, K D Hahn, M J Eckart, H Khater, R M Bionta, D Casey, J Carrera, J Delora-Ellefson, E P Hartouni, D J Schlossberg

{"title":"Neutron-induced backgrounds in coaxial cables on the South Pole neutron time-of-flight detector at the National Ignition Facility.","authors":"S Kerr, J Jeet, E Mariscal, K D Hahn, M J Eckart, H Khater, R M Bionta, D Casey, J Carrera, J Delora-Ellefson, E P Hartouni, D J Schlossberg","doi":"10.1063/5.0219568","DOIUrl":"https://doi.org/10.1063/5.0219568","url":null,"abstract":"As neutron yields increase at fusion facilities, a universal symptom the community must deal with is MeV neutron-induced backgrounds in cables running to diagnostics. On the first Gain >1 plasmas in the world, the National Ignition Facility (NIF) neutron time-of-flight (nToF) diagnostic registered significant cable backgrounds that compromised key performance measurements. The South Pole nToF is uniquely located inside the NIF Target Bay shield walls, ∼18 m from the fusion source, and consequently has long coaxial cable runs (>20 m) that see significant neutron fluence. The resulting neutron-driven current in the cable is comparable to the downscattered neutron signal, compromising the downscattered ratio (DSR) measurement. We have characterized this background with a series of on-shot tests and developed a background subtraction technique to mitigate these effects. The background subtracted DSR results are validated against zirconium activation measurements, indicating that we have successfully reclaimed high-quality data output. The ion temperature measurement is found to not be affected by this background. Alternative approaches to addressing neutron-induced cable backgrounds are presented for potential future hardware upgrades.","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":"142771936","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

Upgraded space and time resolved visible spectroscopic diagnostic on ADITYA-U tokamak.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0219579

Dipexa Modi, M B Chowdhuri, N Yadava, A Kumar, N Ramaiya, A Gauttam, U Rajvanshi, M Rathor, S Patel, R R Sheeba, K B K Mayya, S K Pathak, J Ghosh

{"title":"Upgraded space and time resolved visible spectroscopic diagnostic on ADITYA-U tokamak.","authors":"Dipexa Modi, M B Chowdhuri, N Yadava, A Kumar, N Ramaiya, A Gauttam, U Rajvanshi, M Rathor, S Patel, R R Sheeba, K B K Mayya, S K Pathak, J Ghosh","doi":"10.1063/5.0219579","DOIUrl":"https://doi.org/10.1063/5.0219579","url":null,"abstract":"Poloidal asymmetries in neutral and impurity ion temperatures and particle and impurity transports have been observed in many tokamaks. To investigate these asymmetries, space-resolved visible spectroscopic diagnostic of the ADTIYA-U tokamak has been upgraded to measure the spatial profile of Hα and impurities spectral line profile, ion temperature, and plasma rotation from both low and high field sides of the plasma, simultaneously with a better spatial resolution. This has been done by developing a linear array of 15 optical fibers as compared to the present linear array of nine fibers having a core diameter of 400 μm and coupling it to the entrance slit of a 1 m long high-resolution spectrometer of the existing diagnostic. A sCMOS detector with a larger height has also been employed to record 15 tracks as compared to the nine tracks when the spectrometer was coupled to a CCD detector having a size of 26.6 × 6.6 mm. The spatial profile of the Hα spectral line from the low and high field sides of the ADITYA-U plasma has been now recorded at every 20 ms to investigate neutral particle 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":"142819087","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

A digital servo for ultra-stable laser frequency stabilization.

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-12-01 DOI: 10.1063/5.0226906

Zhengtao Liu, Yu Wang, Wenchao Ji, Yi Hu, Xingyang Cui, Xiao Jiang, Changqing Feng, Shubin Liu

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":"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":"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

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

Bearing fault diagnosis based on wavelet adaptive threshold filtering and multi-channel fusion cross-attention neural network. 基于小波自适应阈值滤波和多通道融合交叉注意神经网络的轴承故障诊断

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0223715

Yunji Zhao, Sicheng Wei, Xiaozhuo Xu

{"title":"Bearing fault diagnosis based on wavelet adaptive threshold filtering and multi-channel fusion cross-attention neural network.","authors":"Yunji Zhao, Sicheng Wei, Xiaozhuo Xu","doi":"10.1063/5.0223715","DOIUrl":"https://doi.org/10.1063/5.0223715","url":null,"abstract":"In industrial applications, it is difficult to extract the fault feature directly when the rolling bearing works under strong background noise. In addition, single-channel vibration sensor data pose limitations in providing a comprehensive representation of bearing fault features; how to effectively fuse data of each channel and extract features is a challenge. To solve the above-mentioned problems, a fault diagnosis method based on wavelet adaptive threshold filtering and multi-channel fusion cross-attention neural network is proposed in this paper. First, the multi-scale discrete wavelet transform is applied to obtain the wavelet coefficients of each channel. Adaptive threshold filtering is conducted to filter out noise and extract symbolic features. The threshold updates with the training of the network. Then, the wavelet coefficients are reconstructed and the channel attention is performed to further extract the symbolic features of the fault signal. Finally, the multi-channel fault signals are fused by a cross-attention module. This module can fully extract the features of each channel and fuse multi-channel data. To improve the generalization ability of the network, residual connections are added. To verify the effectiveness of the proposed method, experiments are carried out on the rolling bearing datasets of Case Western Reserve University and Xi'an Jiaotong University. In addition, the gas turbine main bearing dataset is also applied to prove the reliability of this method.","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":"142604886","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 approach to breaking the 100-milli-Kelvin barrier in electron temperature with a dilution-refrigerator ultrahigh vacuum scanning tunneling microscope. 利用稀释-制冷器超高真空扫描隧道显微镜突破电子温度 100 毫开尔文障碍的方法。

IF 1.3 4区工程技术

Review of Scientific Instruments Pub Date : 2024-11-01 DOI: 10.1063/5.0233223

Ungdon Ham, Hyeonjung Kim, Ji-Soo Yoon, Wooin Yang, Tae-Hwan Kim, Jinho Lee, Han Woong Yeom

{"title":"An approach to breaking the 100-milli-Kelvin barrier in electron temperature with a dilution-refrigerator ultrahigh vacuum scanning tunneling microscope.","authors":"Ungdon Ham, Hyeonjung Kim, Ji-Soo Yoon, Wooin Yang, Tae-Hwan Kim, Jinho Lee, Han Woong Yeom","doi":"10.1063/5.0233223","DOIUrl":"https://doi.org/10.1063/5.0233223","url":null,"abstract":"This study presents a newly constructed dilution-refrigerator ultrahigh vacuum (UHV) scanning tunneling microscope (STM) with a 9/2/2 T superconducting vector magnet capable of achieving electron temperatures as low as 76 mK. Our design emphasizes robust thermal contacts, particularly with the sample holder through a thin insulating layer. Additionally, we focus on effective shielding and grounding against radio-frequency electromagnetic interference by integrating the critical electronics as a physically and electrically integral component of the STM setup. Scanning tunneling spectroscopy results obtained from a superconducting aluminum substrate and a gold tip indicate superior energy resolution, with a higher aspect ratio of the superconducting coherence peak in the dI/dV spectra compared to other dilution-refrigerator UHV STMs. Given that only a handful of UHV STMs with dilution refrigerators have reached electron temperatures below 100 mK, these results demonstrate the effectiveness of our design and methodology in achieving low electron temperatures.","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":"142716948","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