IEEE Transactions on Applied Superconductivity最新文献

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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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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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 : 2025-04-28 DOI: 10.1109/TASC.2025.3554419

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The Influence of Gadolinium Content in GdBCO Industrial 2G HTS Wires on the Superconducting Properties in Magnetic Field GdBCO工业2G高温超导导线中钆含量对磁场超导性能的影响

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-04-28 DOI: 10.1109/TASC.2025.3564716

Pavel N. Degtyarenko;Alexey V. Ovcharov;Alexey Yu. Tsvetkov;Igor A. Karateev;Alexander L. Vasiliev;Vadim A. Amelichev;Burkhan I. Massalimov;Ekaterina A. Golovkova

{"title":"The Influence of Gadolinium Content in GdBCO Industrial 2G HTS Wires on the Superconducting Properties in Magnetic Field","authors":"Pavel N. Degtyarenko;Alexey V. Ovcharov;Alexey Yu. Tsvetkov;Igor A. Karateev;Alexander L. Vasiliev;Vadim A. Amelichev;Burkhan I. Massalimov;Ekaterina A. Golovkova","doi":"10.1109/TASC.2025.3564716","DOIUrl":"https://doi.org/10.1109/TASC.2025.3564716","url":null,"abstract":"The study of the 12-mm-wide 2G HTS wires with gadolinium excess is presented. The GdBCO layer was grown by pulsed laser deposition using commercial production equipment and contained different concentration of Gd: pristine sample, +15%, +30%, and +45% of Gd contents. The samples were characterized by transport measurements over wide temperature (<italic>T) and magnetic field (<italic>B) ranges. The microstructure investigations were carried out by scanning transmission electron microscopy. The resistivity curves of the samples were measured in the field up to 9 T. We determined that the irreversibility temperature (<italic>Tirr) derived from these curves is maximum in case of <italic>B‖<italic>ab. Irreversibility temperature has been decreased with increasing of applied magnetic field from 0 to 3 Т and that confirmed by measurements of the resistivity transition as imaginary part of magnetic susceptibility (<italic>χ”). The maximum of <italic>Tirr obtained in the experiments indicate a different pinning structure mechanism in the studied samples.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-8"},"PeriodicalIF":1.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144090735","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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Fabrication and Test of C3a: A Six-Layer Subscale Canted $cos theta$ Dipole Magnet Using High-Temperature Superconducting corc Wires C3a：六层亚尺度倾斜$cos theta$高温超导磁芯磁体的制造与测试

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-04-28 DOI: 10.1109/TASC.2025.3565222

Dmytro Abraimov;Diego Arbelaez;Lucas Brouwer;Helen Feng;Paolo Ferracin;William B. Ghiorso;Hugh C. Higley;Mariusz Juchno;Andy Lin;Thomas Lipton;Linqing Luo;Maxim Marchevsky;Ian Pong;Soren O. Prestemon;Kyle Radcliff;José Luis Rudeiros Fernández;Anjana Saravanan;Tengming Shen;Reed Teyber;Marcos Turqueti;Danko van der Laan;Xiaorong Wang;Jeremy D. Weiss;Yuxin Wu

{"title":"Fabrication and Test of C3a: A Six-Layer Subscale Canted $cos theta$ Dipole Magnet Using High-Temperature Superconducting corc Wires","authors":"Dmytro Abraimov;Diego Arbelaez;Lucas Brouwer;Helen Feng;Paolo Ferracin;William B. Ghiorso;Hugh C. Higley;Mariusz Juchno;Andy Lin;Thomas Lipton;Linqing Luo;Maxim Marchevsky;Ian Pong;Soren O. Prestemon;Kyle Radcliff;José Luis Rudeiros Fernández;Anjana Saravanan;Tengming Shen;Reed Teyber;Marcos Turqueti;Danko van der Laan;Xiaorong Wang;Jeremy D. Weiss;Yuxin Wu","doi":"10.1109/TASC.2025.3565222","DOIUrl":"https://doi.org/10.1109/TASC.2025.3565222","url":null,"abstract":"<sc>rebco coated conductors have a strong potential for high-field magnet applications. The <sc>rebco technology, however, is still in its infancy for accelerator magnet applications. As part of the U.S. Magnet Development Program, we developed a six-layer canted <inline-formula><tex-math>$cos theta$</tex-math></inline-formula> dipole magnet, C3a, using <sc>corc wires developed by Advanced Conductor Technologies LLC. All the layers were wound using a semiautomated winding machine. Three layers of the magnet used <sc>corc wires containing the SuperPower “AP” <sc>rebco tapes and the remaining layers used the wires containing the “HM” tapes. At 77 K, both kinds of <sc>corc wires showed 5% to 10% degradation, after bending to a minimum bend radius of 30 or 35 mm, with respect to the self-field critical current measured before winding. At 4.2 K, the magnet reached 9.5 kA at a ramp rate of 9 A s<inline-formula><tex-math>$^{-1}$</tex-math></inline-formula> and generated a dipole field of 1.4 T. The critical current of one layer degraded by 4% after a current transient up to 10.5 kA ramped in an averaged rate of 175 kA s<inline-formula><tex-math>$^{-1}$</tex-math></inline-formula> or 20 T s<inline-formula><tex-math>$^{-1}$</tex-math></inline-formula>. We confirmed the HM <sc>corc wire can carry a higher current than the AP <sc>corc wire at 4.2 K. The test results of the C3a magnet showed that the fabrication and assembly procedure can be used for the upcoming full-scale C3 magnet.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 6","pages":"1-15"},"PeriodicalIF":1.7,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144117291","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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