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

Development and Testing of Hybrid HTS Conductor for Steady-State High-Current Applications 用于稳态大电流应用的混合高温超导导体的研制与测试

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-06 DOI: 10.1109/TASC.2025.3577646

Zahoor Ahmad;Asad Yaqoob Mian;Kamran Ahmad;Saira Gulfam

{"title":"Development and Testing of Hybrid HTS Conductor for Steady-State High-Current Applications","authors":"Zahoor Ahmad;Asad Yaqoob Mian;Kamran Ahmad;Saira Gulfam","doi":"10.1109/TASC.2025.3577646","DOIUrl":"https://doi.org/10.1109/TASC.2025.3577646","url":null,"abstract":"Second-generation rare Earth REBCO high-temperature superconductors (HTSs) exhibit a high critical current density and a higher critical magnetic field. HTS materials have the potential to generate magnetic fields that overcome the limitations of low-temperature superconductors. A hybrid high-temperature superconductor (HHTS) was developed by soldering five HTS strips (GdBCO, SUNAM Korea, and 4 mm in width) without insulation (NI) into a copper stabilizer. In addition, five NI-HTS strips without stabilizers were tested at room temperature and in liquid nitrogen (LN2). For the HTS strips, a maximum stable current of 270 A (at LN2 temperature) was achieved at 0.08 V, beyond which the current dropped sharply. The critical electric field (<italic>Ec) calculated from the voltage drop was 14 <italic>μV/mm. The HHTS demonstrated a current-carrying capacity up to 1000 A at an applied voltage of just 0.2 V and a corresponding electric field of 6.8 <italic>μV/mm. The simulation of HHTS was performed by using H-formulation at the cross section, applying currents from 500 to 1000 A, while varying the stabilizer width to 7, 9, and 12 mm. The results indicate stable current conduction up to 1000 A. The copper matrix provides stability during interruption in the cooling system, and the electric field in the HHTS allows operation at higher currents, offering advantages in voltage control and cooling efficiency.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 6","pages":"1-11"},"PeriodicalIF":1.7,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144606292","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}

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Quantifying the Heat Load to Conductors Due to Strain Energy Release in CTD-101 K Magnet Impregnant ctd - 101k磁体浸渍中应变能释放对导体热负荷的量化

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-06 DOI: 10.1109/TASC.2025.3573388

Jan van Steenlandt;Anna Kario;Simon Otten;Laurent Warnet;Sander Wessel;Herman ten Kate;Hans van Oort

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Optimal Design and Analysis of a 14 T Actively Shielded MRI Superconducting Magnet for Medium-Sized Animals 中型动物用14t主动屏蔽MRI超导磁体的优化设计与分析

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-03 DOI: 10.1109/TASC.2025.3576175

Yunhao Mei;Wangnan Shang;Lei Mo;Bensheng Qiu;Qing Zhang

{"title":"Optimal Design and Analysis of a 14 T Actively Shielded MRI Superconducting Magnet for Medium-Sized Animals","authors":"Yunhao Mei;Wangnan Shang;Lei Mo;Bensheng Qiu;Qing Zhang","doi":"10.1109/TASC.2025.3576175","DOIUrl":"https://doi.org/10.1109/TASC.2025.3576175","url":null,"abstract":"This article employs a hybrid optimization method combining two linear programming (LP) steps with one genetic algorithm (GA) step, referred to as 2LP-GA, to successfully design a 14 T/600 mm self-shielding superconducting magnet for medium-sized animal imaging. The magnetic field homogeneity within a spherical volume of 10 cm in diameter is 0.65 ppm. The magnet features a structure integrating a long solenoid with compensation coils and utilizes NbTi and Nb3Sn superconducting materials to reduce manufacturing costs. In addition, this article uses a calculation method for the mechanical properties of superconducting composite materials and applies the obtained parameters to finite element analysis, examining mechanical stresses during winding, cooling, and energization processes. The maximum hoop stress in the coil is 154 MPa. Finally, a quench protection system for the magnet is designed, combining quench detection circuits with active heating methods. Under worst-case quench scenarios, the maximum hotspot temperature and maximum voltage of the coil are limited to 113 K and 1688 V. The analysis also considers stress and stray field variations caused by asynchronous current decay during the quench process.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 6","pages":"1-17"},"PeriodicalIF":1.7,"publicationDate":"2025-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144367056","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}

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IEEE Transactions on Applied Superconductivity Subject Categories for Article Numbering Information 用于物品编号信息的应用超导主题分类

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3566571

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21.7-T Large-Scale High-Temperature Superconducting Toroidal Magnet for Tokamak Fusion Application 用于托卡马克聚变的21.7 t大型高温超导环形磁体

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3573869

Z. Y. Li;Z. C. Pan;H. G. Yang;Y. Y. Li;Y. J. Cao;L. Qiao;B. Gao;G. Huang;C. Zhang;K. P. Zhu;Y. S. Zhao;K. F. Chen;J. Q. Zhou;L. Yao;Q. Q. Wei;Y. X. Guo;Y. Y. Liu;Y. Huang;H. Qiao;W. J. Chen;Y. Q. Du;K. Zhang;X. Chen;A. H. Gong;G. Dong;Y. M. Ye;Z. Yang

{"title":"21.7-T Large-Scale High-Temperature Superconducting Toroidal Magnet for Tokamak Fusion Application","authors":"Z. Y. Li;Z. C. Pan;H. G. Yang;Y. Y. Li;Y. J. Cao;L. Qiao;B. Gao;G. Huang;C. Zhang;K. P. Zhu;Y. S. Zhao;K. F. Chen;J. Q. Zhou;L. Yao;Q. Q. Wei;Y. X. Guo;Y. Y. Liu;Y. Huang;H. Qiao;W. J. Chen;Y. Q. Du;K. Zhang;X. Chen;A. H. Gong;G. Dong;Y. M. Ye;Z. Yang","doi":"10.1109/TASC.2025.3573869","DOIUrl":"https://doi.org/10.1109/TASC.2025.3573869","url":null,"abstract":"With the rapid advancement of magnetic confinement fusion technology, high-temperature superconductors (HTS) have emerged as a cornerstone for compact and efficient tokamak systems due to their exceptional current-carrying capacity under high magnetic fields. Against this backdrop, energy singularity fusion power technology (ES Company) initiated the JingTian (JT) magnet project in December 2023 to validate the toroidal field magnet design for its next-generation all-HTS tokamak facility, HH170. Prior to the HH170 project, ES Company developed and constructed the world’s first all-HTS tokamak. This facility successfully achieved its first plasma operation in June 2024, marking a significant milestone in fusion technology (Z. Yang et al., 2024; Z. Y. Li et al., 2024). This article details the design, fabrication, and performance testing of the JT magnet, a large-scale D-shaped winding pack comprising 32 modular rareearth barium copper oxide (ReBCO) based pancake coils. Operating at 5 K with supercritical helium cooling, the JT magnet achieved a record-breaking peak magnetic field of 21.7 T, the highest reported for an all-HTS tokamak magnet. Steady-state operation at 24.3 kA confirmed its structural integrity, cryogenic cooling efficiency, and alignment with magnetic field modeling predictions. The success of the JT magnet not only provides critical data for the HH170 design but also establishes a foundational milestone for the engineering application of high-field compact tokamaks, demonstrating significant potential to reduce fusion reactor size and cost.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 6","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144581532","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}

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TechRxiv: Share Your Preprint Research with the World! techxiv：与世界分享你的预印本研究！

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3571582

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IEEE Transactions on Applied Superconductivity Information for Authors IEEE应用超导信息汇刊

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3566573

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IEEE Foundation: We Gave Today to Inspire a Brighter Tomorrow IEEE基金会：我们今天的付出是为了激发更光明的明天

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3571584

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IEEE Transactions on Applied Superconductivity Publication Information IEEE应用超导学报出版信息

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-06-02 DOI: 10.1109/TASC.2025.3566657

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A New Test Approach to Taking Negative Bias Currents as Optimization Parameters for RSFQ Circuits 一种以负偏置电流为优化参数的RSFQ电路测试新方法

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-04-30 DOI: 10.1109/TASC.2025.3565743

Minghui Zhang;Minghui Niu;Xiaoping Gao;Huanli Liu;Jiahong Yang;Xiangyu Zheng;Wenqing Hui;Guangming Tang;Jie Ren

{"title":"A New Test Approach to Taking Negative Bias Currents as Optimization Parameters for RSFQ Circuits","authors":"Minghui Zhang;Minghui Niu;Xiaoping Gao;Huanli Liu;Jiahong Yang;Xiangyu Zheng;Wenqing Hui;Guangming Tang;Jie Ren","doi":"10.1109/TASC.2025.3565743","DOIUrl":"https://doi.org/10.1109/TASC.2025.3565743","url":null,"abstract":"The magnetic fields induced by the bias currents and the return currents flowing on a ground plane have a great influence on the performance of complex rapid single flux quantum (RSFQ) circuits. Conventional approach applies equal negative bias currents to the ground contacts adjacent to the bias supply contacts to alleviate this problem, but this strategy may not be optimal when the power supply network is complex. We propose a new test approach to adjusting the negative bias currents independently. By changing the current distribution and thereby altering the spatial distribution of the magnetic field across the chip, this approach can make the circuit work, or make the circuit work more stably. Experimental validation on two 8-bit RSFQ CPUs demonstrated the approach's efficacy: redistributing negative currents restored functionality in a nonoperational circuit and eliminated the intermittent failure in another. These results highlight the critical role of adjusting current distribution in overcoming magnetic interference, offering a practical solution for testing and optimizing the power supply of complex RSFQ circuits where conventional approach falls short.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090696","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}

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