IEEE Transactions on Applied Superconductivity最新文献_第2页

Critical Current Properties of FST on Simple Coated Conductor Architecture 简单涂层导体结构上FST的临界电流特性

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2025-12-18 DOI: 10.1109/TASC.2025.3645746

A. Angrisani Armenio;A. Masi;L. Piperno;G. Celentano;A. Mancini

{"title":"Critical Current Properties of FST on Simple Coated Conductor Architecture","authors":"A. Angrisani Armenio;A. Masi;L. Piperno;G. Celentano;A. Mancini","doi":"10.1109/TASC.2025.3645746","DOIUrl":"10.1109/TASC.2025.3645746","url":null,"abstract":"Coated conductors (CCs) based on iron-based superconductors (IBS) represent a cost-effective alternative to high-temperature superconductors (HTS). Among them, the FeSe0.5Te0.5 (FST) compound is the simplest in the IBS family, demonstrating excellent properties as an epitaxial film. These characteristics make it highly suitable for low-temperature and high-field applications, providing advantages over low-temperature superconductors. Present studies have demonstrated the feasibility of a simple architecture that provides a single metallic buffer layer for the subsequent growth of the superconductor film. From the analysis of the critical current density (JC), these films exhibit excellent superconducting properties both in temperature and in an applied magnetic field, even compared to similar samples grown on single crystals like CaF2, with a value of around 2 MA/cm2 at 4.2 K in self-field, and greater than 0.1 MA/cm2 at 4.2 K up to 17.5 T. Moreover, the angular behavior of JC at different applied magnetic fields shows an almost isotropic behavior, thanks to a large peak when the field is applied perpendicular to the crystallographic ab-plane. This effective pinning landscape may be related to nanostructured grains with a high density of low-angle boundaries, as evidenced by microstructural analysis.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145886623","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

Development of Premix Internal-Magnesium-Diffusion MgB2 Wire Using a Data-Driven Approach 基于数据驱动方法的预混镁扩散MgB2钢丝的研制

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-14 DOI: 10.1109/TASC.2026.3652546

Akiyoshi Matsumoto;Akimitsu Ishii;Rei Kawasaki;Takahiro Hosokawa;Akiyasu Yamamoto

{"title":"Development of Premix Internal-Magnesium-Diffusion MgB2 Wire Using a Data-Driven Approach","authors":"Akiyoshi Matsumoto;Akimitsu Ishii;Rei Kawasaki;Takahiro Hosokawa;Akiyasu Yamamoto","doi":"10.1109/TASC.2026.3652546","DOIUrl":"10.1109/TASC.2026.3652546","url":null,"abstract":"Optimizing various fabrication parameters is one of the major challenges in the development of superconducting wires, often resulting in prolonged transition periods from fundamental research to practical applications. Additionally, escalating costs for essential resources such as liquid helium have amplified the difficulty of experimental work, further underscoring the importance of data-driven research approaches. In this study, we focus on magnesium diboride (MgB2) wires and demonstrate the effectiveness of Bayesian optimization in efficiently searching complex parameter spaces to identify optimal fabrication conditions. Specifically, we investigate the internal magnesium diffusion (IMD) process, employing Bayesian optimization and the BOXVIA visualization tool to explore key heat-treatment parameters—namely, heat-treatment time and temperature—with the aim of maximizing the engineering critical current density (<inline-formula><tex-math>$J_{mathrm{e}}$</tex-math></inline-formula>). Our results show that, under conventional conditions, the highest Je was achieved at approximately 700 °C with a short holding time of less than one hour. Moreover, our process informatics approach enabled the discovery of optimal conditions even under unconventional parameter settings. This methodology substantially reduces the number of experimental iterations required and enhances the performance of superconducting wires. Overall, our data-driven optimization strategy offers a promising route for faster, more efficient wire fabrication and the accelerated commercialization of superconducting technologies.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-4"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146026356","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

Development of a Magnetic Field Measurement System for a REBCO Bulk Superconducting Undulator at SXFEL SXFEL REBCO体超导波动器磁场测量系统的研制

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-06 DOI: 10.1109/TASC.2026.3670796

Chan Liu;Dabin Wei;Zhuangwei Chen;Yimin Tong;Marco Calvi;Kai Zhang

引用次数: 0

Type Tests of a 10 kV/1 MVar High-Temperature Superconducting Air-Core Shunt Reactor 10kv / 1mvar高温超导空芯并联电抗器型式试验

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-02-04 DOI: 10.1109/TASC.2026.3661459

Yanjun Chen;Linlin Chu;Ming Zong;Min Hu;Qingchuan Xu;Honglei Li;Xin Meng;Dinghao Lu;Yunchang Yu;Shuhao Peng;Yurong Zheng;Chenkai Tang;Jie Sheng;Zhijian Jin

{"title":"Type Tests of a 10 kV/1 MVar High-Temperature Superconducting Air-Core Shunt Reactor","authors":"Yanjun Chen;Linlin Chu;Ming Zong;Min Hu;Qingchuan Xu;Honglei Li;Xin Meng;Dinghao Lu;Yunchang Yu;Shuhao Peng;Yurong Zheng;Chenkai Tang;Jie Sheng;Zhijian Jin","doi":"10.1109/TASC.2026.3661459","DOIUrl":"10.1109/TASC.2026.3661459","url":null,"abstract":"With the rapid expansion of power system and the increasing level of underground-cable deployment in urban grids, the reactive power generated can no longer be absorbed locally during off-peak demand periods. This results in a reverse flow of reactive power, drives abnormal voltage rise, and poses a significant threat to grid stability and security. This paper presents a potential solution based on high-temperature superconducting (HTS) shunt reactor, and also provides a systematic introduction to the type tests of the 10 kV/1 MVar HTS reactor in Shanghai. First, the paper outlines the core structure and system composition of the device. Subsequently, it details the routine and special test items designed for the superconducting reactor, explains the unique temperature dynamic balance state of the superconducting reactor, and estimates the AC loss values of the superconducting reactor during actual operation. The results of this paper provides a solid foundation for the future in-field demonstration of superconducting reactors.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-6"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148484438","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

Balancing Structure and Performance: Optimized BZO Nanorod Doping in Ca-Interlayered YBCO Multilayers 平衡结构与性能：优化的BZO纳米棒掺杂在ca层间YBCO多层材料中

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-20 DOI: 10.1109/TASC.2026.3656256

C. Condo;S. Mejia;M. M. Aye;E. Rivasto;H. Huhtinen;P. Paturi

{"title":"Balancing Structure and Performance: Optimized BZO Nanorod Doping in Ca-Interlayered YBCO Multilayers","authors":"C. Condo;S. Mejia;M. M. Aye;E. Rivasto;H. Huhtinen;P. Paturi","doi":"10.1109/TASC.2026.3656256","DOIUrl":"10.1109/TASC.2026.3656256","url":null,"abstract":"This study demonstrates the enhancement of critical current density over a wide temperature and magnetic field range in BZO-doped YBCO multilayer structures using a Ca-doped YBCO intermediate layer. Compared to single-layer BZO-doped YBCO films, the Ca-doped interlayer improves crystalline quality and reduces non-uniform strain, particularly at low BZO doping concentrations, and promotes better growth of BZO nanorods. Additionally, multilayering slightly increases YBCO's oxygen content across all BZO concentrations, contributing to a higher critical temperature and zero-field critical current density. Besides of this, multilayering enhances critical current density across the magnetic field range, especially at low fields and high BZO concentrations. However, the highest absolute zero-field critical current density is achieved in undoped multilayered YBCO, whereas in fields above 2 T and up to 50 K, the best performance is obtained with 4% BZO-doped YBCO layers separated by Ca-doped interlayers. At around 1 T, 2% BZO doping yields the highest critical current density. This paper also explores the possible mechanisms behind these effects, proposing that multilayering BZO-doped YBCO with a crystal structure-balancing interlayer could be key to next-generation YBCO coated conductors for high-temperature superconductor applications. Optimising the BZO concentration is crucial when tailoring YBCO compositions for different operating conditions.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11359483","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148485162","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

Characterization of Solid-State Switch Technologies for Transformer-Rectifier Flux Pumps Supplying High-Current, High-Inductance DC Magnets 提供大电流、高电感直流磁体的变压器-整流磁通泵固态开关技术的特性

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-03 DOI: 10.1109/TASC.2026.3669476

Hamza Benrabah;Giacomo Russo;Luca Murari;Emiliano Guerra;Mattia Simonazzi;Sabino Pipolo;Alessandro Lampasi;Antonio Morandi

{"title":"Characterization of Solid-State Switch Technologies for Transformer-Rectifier Flux Pumps Supplying High-Current, High-Inductance DC Magnets","authors":"Hamza Benrabah;Giacomo Russo;Luca Murari;Emiliano Guerra;Mattia Simonazzi;Sabino Pipolo;Alessandro Lampasi;Antonio Morandi","doi":"10.1109/TASC.2026.3669476","DOIUrl":"10.1109/TASC.2026.3669476","url":null,"abstract":"Traditional power supplies for superconducting magnets suffer from significant losses mainly due to thermal dissipation through current leads. Superconducting flux pumps offer a contactless, low-voltage, high-current alternative, effectively reducing dissipation in the power supply system. They are broadly classified into traveling-wave and transformer-rectifier topologies. The latter involves a contactless AC source and a cascaded rectifier unit, usually consisting of superconducting switches driven by temperature or magnetic field, or alternative, of solid-state switches. Solid state switches provide fast switching times with nearly zero losses in the open state but produce non-zero loss during on-state, which affects overall loss performance of the flux pump during quasi-persistent mode operation. This study focuses on transformer-rectifier based on solid-state switches, emphasizing the impact of switch selection on efficiency and performance. To this aim, a characterization of the solid-state switches, both in terms of on-state resistance and switching losses, was conducted where different technologies including Si-MOSFET and GaN devices are considered. The presented characterization provides quantitative guidance for selecting solid-state switches in transformer-rectifier flux pumps supplying high-current, high-inductance superconducting magnets. These results will be used to optimize switch selection for a full-scale transformer–rectifier flux pump designed to supply a toroidal field magnet in a fusion machine, rated at 42.5 kA and 2.2 H.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-7"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148486623","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

Critical Design Problems and Possible Solutions to a Superconducting Squirrel-Cage Induction Machine: An Electrical Machines’ Expert Point-of-View 超导鼠笼式感应电机的关键设计问题和可能的解决方案：电机专家的观点

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-01-16 DOI: 10.1109/TASC.2026.3653358

João F. P. Fernandes;Fredemar Rüncos;Fábio N. R. Yamanaka;P. J. Costa Branco

{"title":"Critical Design Problems and Possible Solutions to a Superconducting Squirrel-Cage Induction Machine: An Electrical Machines’ Expert Point-of-View","authors":"João F. P. Fernandes;Fredemar Rüncos;Fábio N. R. Yamanaka;P. J. Costa Branco","doi":"10.1109/TASC.2026.3653358","DOIUrl":"10.1109/TASC.2026.3653358","url":null,"abstract":"Induction machines, known for their robustness and low cost, remain underexplored with superconductors. One promising solution is using High-Temperature Superconducting (HTS) tapes or bars in the rotor cage, resulting in induction-synchronous machines. However, this solution still has limited magnetic flux density due to the iron core saturation and requires rotating cryostats. An alternative solution is using HTS stator windings and air-core designs, which enable a static cryostat and higher magnetic flux densities. We analyze the design of different topologies of induction machines with air-core and limited air-core and HTS only in the stator windings, enabling the use of a static cryostat in the stator. Using a 50 kW reference machine, the performance of air-core, limited air-core, and iron-core HTS topologies is evaluated. These are analyzed via finite-element calibrated models for the machine performance and estimation of AC HTS tape losses. Findings revealed that, besides the AC losses, reactive power also plays a crucial role. The best configuration achieved 635 kW, 95.3 % efficiency, and 823 kvar.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-5"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11355914","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148486752","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

Modelling Analysis of a Self-Switching Rectifier Flux Pump Using a Field–Circuit Coupling Method 自开关整流磁通泵的场路耦合建模分析

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-18 DOI: 10.1109/TASC.2026.3674958

Jiafu Wei;Hongye Zhang;Qian Dong;Adil Shah;Ozan Keysan;Markus Mueller

{"title":"Modelling Analysis of a Self-Switching Rectifier Flux Pump Using a Field–Circuit Coupling Method","authors":"Jiafu Wei;Hongye Zhang;Qian Dong;Adil Shah;Ozan Keysan;Markus Mueller","doi":"10.1109/TASC.2026.3674958","DOIUrl":"10.1109/TASC.2026.3674958","url":null,"abstract":"High-temperature superconducting (HTS) self-switching flux pumps can inject direct current into closed-loop HTS coils without electrical contacts. Targeting practical application, this work investigated the charging capability, losses, and efficiency of the flux pump, explicitly capturing current sharing effect in the bridge tape based on a field–circuit coupled model. This paper focuses on four key design factors: the peak value and duty ratio of input primary-side positive current, secondary (series) resistance, and the copper stabilizer thickness of the bridge tape. The results showed that increasing the positive peak value of primary current can increase charging speed and the pumped current, while the secondary resistance exhibits an optimal value. Variations in the positive duty ratio highlight a trade-off between the pumped current, secondary-side efficiency, initial ramp rate, and ripple level. Finally, changes in the copper stabilizer mainly influence the current-sharing effect of the bridge tape and the bridge voltage, with associated impact on charging performance and efficiency. The modelling framework and findings derived from these studies provide practical guidance for parameter selection and prototype design of the self-switching flux pump.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-7"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148487414","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

SuperLink 150 m Demo and Large-Scale Perspective 超级链接150米演示和大尺度透视

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-04-02 DOI: 10.1109/TASC.2026.3680368

D. Willén;M. Pitzer;C. Thidemann;O. Holte;J. Kunert;C. Kozaris;C. Wolff;W. Prusseit;R. Bach;W. T. B. de Sousa;M. Noe;P. Michalek;R. Prinz;A. Alekseev

引用次数: 0

Investigation of Thermal Distribution in Cryogenically Cooled Inverter for HTS Motor 高温超导电机低温冷却逆变器的热分布研究

IF 1.8 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-04-03 DOI: 10.1109/TASC.2026.3680465

Yuchen Wang;Jiawen Xi;Ming Zhang;Wei Hua;Xianwu Zeng;Chris Brace;Xiaoze Pei

{"title":"Investigation of Thermal Distribution in Cryogenically Cooled Inverter for HTS Motor","authors":"Yuchen Wang;Jiawen Xi;Ming Zhang;Wei Hua;Xianwu Zeng;Chris Brace;Xiaoze Pei","doi":"10.1109/TASC.2026.3680465","DOIUrl":"10.1109/TASC.2026.3680465","url":null,"abstract":"In superconducting electric propulsion systems, power inverters must operate reliably under cryogenic environments to efficiently drive superconducting motors. Integrating power electronic inverters within the existing cryogenic cooling system for superconducting motor can simplify cooling circuits and enhance system-level compactness. Moreover, the on-state and switching losses of insulated gate bipolar transistor (IGBT) reduce at cryogenic temperature, thereby improving efficiency. Previous studies have shown that the characteristics of power devices are highly dependent on temperature. However, limited research has investigated how inverter design parameters affect thermal distribution when the inverter is directly coupled with a cryogenically cooled superconducting drive system. This paper experimentally investigates both output and switching characteristics to examine the changes in IGBT losses under different temperatures. A comprehensive analysis is given on how design parameters influence thermal distribution in cryogenically cooled inverters with rated power of 100 kW. The results provide practical guidelines for thermal design and integration of power electronics in superconducting propulsion systems.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"36 5","pages":"1-6"},"PeriodicalIF":1.8,"publicationDate":"2026-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148487465","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