IEEE Transactions on Applied Superconductivity最新文献_第6页

Systematic Studies to Enhance Flux Pinning of (BaZrO3/YBa2Cu3O7-x)N Multilayer Thin Films for the Full Landscape of T = 30 K to 77 K （BaZrO3/YBa2Cu3O7-x）N多层薄膜在T = 30k ~ 77k全景观下增强通量钉钉的系统研究

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-07 DOI: 10.1109/TASC.2025.3543791

Timothy J. Haugan;Joshua N. Reichart;F. Javier Baca;Neal A. Pierce;Timothy A. Campbell;Iman Maartense;Mary Ann P. Sebastian;T. J. Bullard;Paul N. Barnes

{"title":"Systematic Studies to Enhance Flux Pinning of (BaZrO3/YBa2Cu3O7-x)N Multilayer Thin Films for the Full Landscape of T = 30 K to 77 K","authors":"Timothy J. Haugan;Joshua N. Reichart;F. Javier Baca;Neal A. Pierce;Timothy A. Campbell;Iman Maartense;Mary Ann P. Sebastian;T. J. Bullard;Paul N. Barnes","doi":"10.1109/TASC.2025.3543791","DOIUrl":"https://doi.org/10.1109/TASC.2025.3543791","url":null,"abstract":"The (M/YBa2Cu3O7-x)N multilayer thin film structure has been studied by many groups, and achieves different microstructures and artificial pinning centers that result in large variations of critical current density (<italic>Jc) for a large landscape space of <italic>T = 30–77 K, <italic>Happl = 0–9 T and 0° ≤ <italic>Happl(θ) ≤ 90°. Herein provides a wide-ranging optimization study of (BaZrO3,y/YBa2Cu3O7-x,z)N multilayer films prepared by pulsed laser deposition with y,z layer thickness. Process parameters studied include YBa2Cu3O7-x (YBCO) layer thickness from 3–300 nm, BaZrO3 (BZO) layer thickness from 0.5-1.5 nm, and film growth temperature from 775–825 °C. Systematic results of critical transition temperature (<italic>Tc) and <italic>Jc(H,T,Θ) were plotted as function of YBCO layer thickness and BZO addition up to 16 volume % . Optimization of <italic>Jc(H,T,θ) was found to vary with process parameters from 30–77 K, for example at 77 K flux pinning was optimized for 825 °C process temperature. However, for 30 K operation temperature, flux pinning was much less sensitive to BZO+YBCO film parameters, and slightly optimized for 805 °C process temperature. For all <italic>H,T conditions studied, the <italic>Jc(H,T) values achieved a maximum peak for BZO = 8–12 volume % additions in close agreement with published models of flux pinning, and required BZO layer thickness < 0.6 nm.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Updated Cylindric Linear-Motor Type Flux Pump With Rapid Current Variation Capability 一种具有快速电流变化能力的新型圆柱形直线电机磁通泵

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-06 DOI: 10.1109/TASC.2025.3548623

Yong Lei;Mengchao Zhang;Wei Wang;Chenghuai Wu;Haoyan Liu;Lin He;Li Zhou;Peng Liu;Fuling Tang;Linshuang Chen;Zhigang Yang;Dongyang Wu

{"title":"An Updated Cylindric Linear-Motor Type Flux Pump With Rapid Current Variation Capability","authors":"Yong Lei;Mengchao Zhang;Wei Wang;Chenghuai Wu;Haoyan Liu;Lin He;Li Zhou;Peng Liu;Fuling Tang;Linshuang Chen;Zhigang Yang;Dongyang Wu","doi":"10.1109/TASC.2025.3548623","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548623","url":null,"abstract":"In comparison to traditional DC power supplies, linear-motor type flux pumps present a number of advantages, including a reduction in dimensions, a lower cost, and decrease in energy consumption. Therefore, it is useful to use a flux pump to power superconducting magnets in a non-contact manner. In order to facilitate the rapid excitation and current modulation of superconducting magnets updated flux pump was designed to deliver a higher DC voltage output. The distribution of magnetic flux density was analyzed using COMSOL Multiphysics, which helped in determining the optimal design parameters. We extended the coupling interval of the updated flux pump to 447 mm. The updated flux pump was tested at 77 K in liquid nitrogen, with a maximum output voltage of 118.24 mV, the updated flux pump can charge an insulated (INS) double pancake coil (DPC) with 75 turns per layer to a maximum current of 88.90 A in 9 s, exceeding the critical current (<inline-formula><tex-math>${I}_{C}$</tex-math></inline-formula>) for the DPC. This updated flux pump can power superconducting rotors in superconducting motors, magnetic resonance imaging (MRI) and other devices. This study verifies that extending the coupling length can effectively increase the output voltage of flux pumps, which has far-reaching effects on the application of linear-motor type flux pumps.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","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 Analysis of Parallel Hybrid-Excited Superconducting Electromagnetic Support System for High-Speed Electromagnetic Suspension Maglev 高速电磁悬浮磁悬浮并行混合激励超导电磁支撑系统的设计与分析

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-06 DOI: 10.1109/TASC.2025.3548585

Deming Huang;Lichao Nie;Chaoqun Jiao;Jin Fang

{"title":"Design and Analysis of Parallel Hybrid-Excited Superconducting Electromagnetic Support System for High-Speed Electromagnetic Suspension Maglev","authors":"Deming Huang;Lichao Nie;Chaoqun Jiao;Jin Fang","doi":"10.1109/TASC.2025.3548585","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548585","url":null,"abstract":"The conventional electromagnetic maglev train is currently the sole commercially operated high-speed maglev train; however, it faces challenges, such as a narrow suspension gap, excessive energy consumption, and heat dissipation issues. High-temperature superconducting materials possess the advantages of zero resistance and high current-carrying capacity. Building upon the conventional high-speed electromagnetic levitation train, this article proposes a parallel hybrid-excited superconducting electromagnetic support system that incorporates both high-temperature superconducting and conventional components. By considering the symmetry of the support arm and electromagnetic field, certain normally conducting electromagnets are replaced with superconducting ones. Utilizing the conventional electromagnetic support system as a basis, we conducted finite-element simulation to establish and analyze the superconducting hybrid electromagnetic support and linear motor traction system. At suspension gaps of 15 and 20 mm, superconducting electromagnets contribute 80% of the suspension force without significant traction loss, while normally conducting electromagnets require smaller currents for system support and traction functions. The suspension gap can be effectively controlled within a certain safe range (15–20 mm) by maintaining a constant current in the electromagnetic coil.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 3","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Advancing Reel-to-Reel Inspection Techniques for Long HTS Conductors: Comparison and Innovations 推进长高温超导导体的卷对卷检测技术：比较与创新

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-06 DOI: 10.1109/TASC.2025.3548629

Siwei Chen;Yi Li;Chirag Goel;Piotr Bunkowski;Jonathan Dye;Lingfeng Zhu;Jian Rong;Yuhu Zhai;Venkat Selvamanickam

{"title":"Advancing Reel-to-Reel Inspection Techniques for Long HTS Conductors: Comparison and Innovations","authors":"Siwei Chen;Yi Li;Chirag Goel;Piotr Bunkowski;Jonathan Dye;Lingfeng Zhu;Jian Rong;Yuhu Zhai;Venkat Selvamanickam","doi":"10.1109/TASC.2025.3548629","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548629","url":null,"abstract":"The continuous advancement of high-temperature superconductor (HTS) technologies has greatly accelerated the development and deployment of HTS applications. Among the critical tools supporting these advancements are reel-to-reel (R2R) critical current (<inline-formula> <tex-math>$I_{c}$</tex-math></inline-formula>) measurement techniques, which are extensively used by both manufacturers and end users to characterize long-length REBCO conductors. These techniques play a vital role in quality assurance and quality control (QA/QC), ensuring the reliability and performance of HTS conductors and applications throughout the production cycle. We have developed a range of in-house devices for R2R measurements at the University of Houston and Princeton Plasma Physics Laboratory. These include one-dimensional (1D) scan using a magnetic circuit (MC) and two-dimensional (2D) magnetic field mapping systems based on scanning probe array microscope (SPAM) or scanning probe microscopy (SPM). Each technique offers distinct advantages: the MC system provides ultra-fast scanning speeds, ideal for rapid inspection in large-scale industrial production; the high-resolution SPM delivers detailed insights for conductor research and development; and the SPAM, with its simpler mechanical setup, can be upgraded for higher field and lower temperature conditions with a balanced 2D resolution. We compared the magnetization and detection capabilities of these techniques through experiments on rare-earth barium copper oxide (REBCO) coated conductor samples, with data analysis supported by numerical simulations. Based on our comprehensive comparative studies, we propose enhancements for each measurement system and provide guidelines for selecting the optimal technique combinations to meet specific application requirements.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mechanical Simulation of 2G HTS Tapes and Stacks During Localized Temperature Increase 局域升温过程中2G高温超导带和堆的力学模拟

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-06 DOI: 10.1109/TASC.2025.3548635

Hamed Milanchian;Shahriar Bakrani Balani;Tiina Salmi

{"title":"Mechanical Simulation of 2G HTS Tapes and Stacks During Localized Temperature Increase","authors":"Hamed Milanchian;Shahriar Bakrani Balani;Tiina Salmi","doi":"10.1109/TASC.2025.3548635","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548635","url":null,"abstract":"High-temperature superconductor (HTS) materials have emerged as promising candidates for high-field magnets due to their superior critical current density, temperature, and magnetic fields. During magnet quench, high current density can quickly lead to local temperature increase and temperature gradient that can potentially damage the coil. This paper presents an analysis of the mechanical impact of the large thermal gradients. The study employs 3D finite element method (FEM) simulations to investigate the mechanical responses of second-generation HTS tapes to different hotspot temperature profiles. The focus is on analyzing the axial tape strain, normal stress and the various shear stresses in tape layer interfaces. We consider both single tapes and tape stacks. The normal zone propagation is not simulated, but we examine different end-temperature profiles to identify the critical thermal conditions that may lead to too large strain or stress. The results suggest that induced axial strain can exceed the elastic limit or lead to irreversible critical current reduction. Also, the shear stress computed using the Mohr-Coulomb criterion may reach very high values potentially leading to mixed-mode delamination. Future studies are needed to verify the damage methods after high temperatures and help in determining the maximum safe temperature in magnet design. The results highlight the importance of mechanical boundary conditions in this type of numerical or experimental study.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10916518","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

3D Numerical Studies of a Radial-Type Superconducting Magnetic Bearing Consisting of HTS Coils and PM 由高温超导线圈和永磁材料组成的径向超导磁轴承的三维数值研究

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-06 DOI: 10.1109/TASC.2025.3544616

Qi Xu;Yi Lin;Ruixiang Wang;Changhao Hu;Jianzhao Geng

引用次数: 0

Experimental Study on Temperature-Controlled Charging Sequence for Reduction of Screening Current Effect in HTS Magnet 降低高温超导磁体屏蔽电流效应的温控充电顺序实验研究

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-04 DOI: 10.1109/TASC.2025.3547814

Hyunsoo Park;Geonyoung Kim;Jaemin Kim;Chaemin Im;Jeonghwan Park;Wooseung Lee;Wonseok Jang;Gaël Berthet;JuKyung Cha;Yufan Yan;Wonju Jung;Seungyong Hahn

{"title":"Experimental Study on Temperature-Controlled Charging Sequence for Reduction of Screening Current Effect in HTS Magnet","authors":"Hyunsoo Park;Geonyoung Kim;Jaemin Kim;Chaemin Im;Jeonghwan Park;Wooseung Lee;Wonseok Jang;Gaël Berthet;JuKyung Cha;Yufan Yan;Wonju Jung;Seungyong Hahn","doi":"10.1109/TASC.2025.3547814","DOIUrl":"https://doi.org/10.1109/TASC.2025.3547814","url":null,"abstract":"High-temperature superconductor (HTS) rare-earth barium copper oxide (REBCO) conductor has been extensively researched and developed for various applications. However, due to the intrinsic properties of REBCO conductors, the screening current occurs and this effect causes induced field and stress in superconducting magnets. Therefore, we investigated a strategy to mitigate the screening current effect in HTS magnets with the simultaneous control of temperature and current. In this paper, we ramped up the coil and measured the magnetic field of the HTS magnet as a references on conduction cooling system within different temperature: 20 K and 50 K. Then, the temperature-controlled charging sequence method with PID control was conducted so that the current ramping up simultaneously started with the magnet cool down: (1) 50 K to 20 K and (2) 80 K to 50 K. Finally, we analyzed the experiment results of the magnetic field distribution compared to reference charging values. These results showed the possibility to develop the operating techniques for high-field REBCO magnets that reduce the screening current induced field.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143761434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes n-填充型REBCO带的电流共享及力学性能

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-04 DOI: 10.1109/TASC.2025.3547318

Shengchen Xue;Lingfeng Zhu;Jian Rong;Nghia Mai;Yi Li;Siwei Chen;Umesh Sambangi;Jithin Peram;Venkat Selvamanickam

引用次数: 0

Modeling and Simulation of Microwave Kinetic Inductance Detector Readout System Using Simulink and RF Blockset 基于Simulink和RF Blockset的微波动态电感探测器读出系统建模与仿真

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-04 DOI: 10.1109/TASC.2025.3547281

Taehoon Kim

引用次数: 0

Geometry Dependent Superconductive Transition of Nb Nanostructures Nb纳米结构的几何相关超导跃迁

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-03 DOI: 10.1109/TASC.2025.3546930

Ivan De Carlo;Matteo Fretto;Natascia De Leo;Gianluca Milano

{"title":"Geometry Dependent Superconductive Transition of Nb Nanostructures","authors":"Ivan De Carlo;Matteo Fretto;Natascia De Leo;Gianluca Milano","doi":"10.1109/TASC.2025.3546930","DOIUrl":"https://doi.org/10.1109/TASC.2025.3546930","url":null,"abstract":"Recently, superconducting nanostructures gained particular attention due to the visualisation of some intriguing phenomena, such as phase fluctuations, quantum phase slip, shape resonance in critical temperature, allowing the definition of a tailored superconducting nanodevice with the desired superconducting features, quantum phenomena. A deep investigation into the relationship between superconductivity, low dimensionality, quantum phenomena should be performed, in order to explain the emergence mechanism of these effects in nanostructures, how superconductivity is affected. In the following, we report on the investigation of the superconductive transition in triangular-shaped Nb pads connecting a Nb nanostripe. As revealed by <italic>R vs T curves, and the superconductive transition is observed to be characterised by two regions: i) a first smooth and wide transition reflecting the continuous reduction in the width of the Nb triangular pads that progressively experience superconductive transition, and ii) a more abrupt transition reflecting the transition of the Nb nanostripe. This work could pave the way concerning the realisation of Nb nanostructures with tunable critical temperature, transition width, and slope.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143655098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0