IEEE Transactions on Applied Superconductivity最新文献_第3页

Advancing Reel-to-Reel Inspection Techniques for Long HTS Conductors: Comparison and Innovations

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

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

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

Current Sharing and Mechanical Properties of Slot-n-Fill REBCO Tapes

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

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

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</i> 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

Design Study of Fully Superconducting Motor With MgB$_{2}$ Wire and YBCO Bulk Combination for Brushless Operation

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.2025.3542340

Jaheum Koo;JuKyung Cha;Jonghoon Yoon;Wonseok Jang;Dongwoo Lee;In Gyeong Park;Sang Heon Lee;Seungyong Hahn;Sangjin Lee

{"title":"Design Study of Fully Superconducting Motor With MgB$_{2}$ Wire and YBCO Bulk Combination for Brushless Operation","authors":"Jaheum Koo;JuKyung Cha;Jonghoon Yoon;Wonseok Jang;Dongwoo Lee;In Gyeong Park;Sang Heon Lee;Seungyong Hahn;Sangjin Lee","doi":"10.1109/TASC.2025.3542340","DOIUrl":"https://doi.org/10.1109/TASC.2025.3542340","url":null,"abstract":"In response to increasing environmental regulations and the push towards electrification, superconducting motors have gained significant interest due to their high power density potential. This paper presents the design and analysis of a conceptual fully superconducting brushless motor featuring MgB<inline-formula><tex-math>$_{2}$</tex-math></inline-formula> armature windings and YBCO bulk superconductors in the rotor. The proposed motor utilizes post-assembly magnetization using field cooling, achieving a trapped magnetic field exceeding 2 T. Through optimization and magnetization analysis, the YBCO bulk-type designed motor calculated a 61% improvement in power density compared to a permanent magnet-type designed motor. The design also shows thermal losses of 1.58 kW, which can be effectively covered using LH<inline-formula><tex-math>$_{2}$</tex-math></inline-formula> cooling. These results present the feasibility of a high-performance, brushless design with HTS bulk field magnets, paving the way for relatively compact cryogenic motor applications.","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":"143621613","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

Comparative Study of Numerical Modeling Methods for a Flux-Pumped Josephson Parametric Amplifier

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.2025.3546921

Seong Hyeon Park;Gahyun Choi;Bokyung Kim;Gyunghun Kim;Yong-Ho Lee;Seungyong Hahn

{"title":"Comparative Study of Numerical Modeling Methods for a Flux-Pumped Josephson Parametric Amplifier","authors":"Seong Hyeon Park;Gahyun Choi;Bokyung Kim;Gyunghun Kim;Yong-Ho Lee;Seungyong Hahn","doi":"10.1109/TASC.2025.3546921","DOIUrl":"https://doi.org/10.1109/TASC.2025.3546921","url":null,"abstract":"Quantum-limited noise amplifiers based on superconducting Josephson junction elements are essential components for measuring low-power signals in a wide range of applications. The gain bandwidth of a flux-pumped Josephson parametric amplifier can be broadened by coupling junction elements with an impedance-matching network. Well-known modeling methods for these amplifiers typically assume ideal lumped-element circuits for passive components, but often overlook unexpected resonant modes arising from the bulk geometric features. To address this challenge, flux-pumped junction elements can be simulated using finite-element analysis (FEA) combined with the pumpistor modeling method, which accurately accounts for the geometric features of arbitrary impedance-matching circuits. Here, we present a benchmark study using a circuit topology to compare different modeling methods: (1) the coupled mode network method, (2) the harmonic balance method, (3) the analytical pumpistor method, and (4) the FEA-assisted pumpistor method. Our results highlight the importance of accurately reflecting geometric features to prevent unexpected resonant modes and avoid detuning from the target flux bias values.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667268","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

Enhanced Model for Non-Insulated HTS Coils

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.2025.3546873

Stefano Sorti;Lorenzo Balconi;Gabriele Crespi;Lucio Rossi;Carlo Santini;Marco Statera

{"title":"Enhanced Model for Non-Insulated HTS Coils","authors":"Stefano Sorti;Lorenzo Balconi;Gabriele Crespi;Lucio Rossi;Carlo Santini;Marco Statera","doi":"10.1109/TASC.2025.3546873","DOIUrl":"https://doi.org/10.1109/TASC.2025.3546873","url":null,"abstract":"This paper addresses the topic of modelling 2 G HTS tapes and coils, especially (but not limited to) Non-Insulated (NI) devices. We propose a novel 3D electromagnetic Volume Integral Formulation (VIM) for homogenized coils. This model combines the flexibility of distributed circuit models with the numerical approach of Finite Element Methods (FEM). It offers some distinctive features if compared to already available integral formulations (such as Partial Element Equivalent Circuit): first, it describes the current vector potential <bold>T</b> with quadratic shape functions, resulting in non-constant current densities <bold>J</b> inside mesh elements. Secondly, it allows for homogenization of coil turns, together with arbitrarily curved geometries. The results of the model are verified against a COMSOL simulation. The discussion of the model includes also a fast current-sharing calculation in case of overcurrent, with the aim of providing comprehensive heat losses, to then feed thermal models. This work can contribute in better describing and understanding the behavior of NI coils under most operative conditions, expanding the capability of testing and diagnosing these devices.","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":"143688143","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

Experimental Validation of a Scaling Law for the Critical Current of Commercial REBCO Tapes as a Function of Magnetic Field and Temperature

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-28 DOI: 10.1109/TASC.2025.3543797

G. Succi;A. Ballarino;S. C. Hopkins;Y. Yang

{"title":"Experimental Validation of a Scaling Law for the Critical Current of Commercial REBCO Tapes as a Function of Magnetic Field and Temperature","authors":"G. Succi;A. Ballarino;S. C. Hopkins;Y. Yang","doi":"10.1109/TASC.2025.3543797","DOIUrl":"https://doi.org/10.1109/TASC.2025.3543797","url":null,"abstract":"Much information is lacking at present on the electrical properties of commercial REBCO tapes. This work, which builds on a previous paper of the same authors, presents the results of an experimental campaign aimed at deriving the critical current of tapes from SuperPower, Fujikura, Faraday Factory, and Shanghai Superconductor Technology. The campaign was conducted by applying both the transport method at 4.2 K, in perpendicular background magnetic fields of up to 15 T, and the magnetization method from 4.2 K up to the critical temperature in fields of up to 10 T. This latter method was adopted to determining the so-called crossover field, <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula>, at which the transition from single vortex pinning to collective pinning takes place. <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> is challenging to determine by the transport method because of the high currents involved (at 4.2 K, <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> is roughly 1 T, which corresponds to currents above 1500 A, for a 4 mm tape). Magnetization measurements corroborate transport measurements at 4.2 K both below <inline-formula><tex-math>${{B}_0}$</tex-math></inline-formula> and up to 10 T. Further magnetization measurements above 4.2 K allow the temperature dependence of the scaling parameters to be derived, for correlation with the methodology of flux pinning enhancement by different manufacturers. This provides insights about the effectiveness and interplay of pinning mechanisms.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654960","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