IEEE Transactions on Applied Superconductivity最新文献_第8页

HTS for Future Circular Collider Beamscreen: New Moderate High-Pressure Reaction for the Synthesis of Tl-1223 未来圆形对撞机光束屏的高温超导：合成Tl-1223的新中高压反应

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-10 DOI: 10.1109/TASC.2025.3549739

Alessandro Leveratto;Aisha Saba;Cristina Bernini;Federico Loria;Matteo Cialone;Andrea Malagoli;Sergio Calatroni;Emilio Bellingeri

{"title":"HTS for Future Circular Collider Beamscreen: New Moderate High-Pressure Reaction for the Synthesis of Tl-1223","authors":"Alessandro Leveratto;Aisha Saba;Cristina Bernini;Federico Loria;Matteo Cialone;Andrea Malagoli;Sergio Calatroni;Emilio Bellingeri","doi":"10.1109/TASC.2025.3549739","DOIUrl":"https://doi.org/10.1109/TASC.2025.3549739","url":null,"abstract":"This study focuses on the synthesis and characterization of the Tl0.7Bi0.2Pb0.2Sr1.6Ba0.4Ca1.9Cu3O9+x (Tl-1223) superconducting phase, with particular emphasis on constructing a detailed phase diagram that maps its formation across varying temperatures and oxygen pressures. By optimizing these parameters, we were able to determine the precise conditions for obtaining a high-purity Tl-1223 phase. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to examine the crystalline structure and morphology, while magnetic properties were investigated using SQUID magnetometry. The phase diagram provides critical insights into the stability of Tl-1223, guiding future synthesis efforts. Our magnetic measurements confirmed superconducting behavior with a critical temperature of approximately 120 K, validating the optimized synthesis process. Though primarily focused on phase formation, this research also opens up the potential for applying Tl-1223 in the Future Circular Collider (FCC) as a beam screen coating material. The superconducting properties of Tl-1223 make it a promising candidate for overcoming the limitations of traditional materials under FCC operational conditions. Future work will explore the preparation of Tl-1223 films for this application.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716541","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, Test, and Shimming of a 1.5-T Head-Only MRI Superconducting Magnet 1.5 t头部核磁共振超导磁体的设计、测试和调光

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-03-08 DOI: 10.1109/TASC.2025.3568142

Yunxing Song;Zhiwen Cheng;Xunhuang Jiang;Jianglan Li;Liang Li;Qiuliang Wang

{"title":"Design, Test, and Shimming of a 1.5-T Head-Only MRI Superconducting Magnet","authors":"Yunxing Song;Zhiwen Cheng;Xunhuang Jiang;Jianglan Li;Liang Li;Qiuliang Wang","doi":"10.1109/TASC.2025.3568142","DOIUrl":"https://doi.org/10.1109/TASC.2025.3568142","url":null,"abstract":"As the core component of magnetic resonance imaging (MRI) system, superconducting magnet provides a high-intensity, stable, and homogeneous magnetic field background for the system. The strength, stability, and homogeneity of the magnetic field directly affect the imaging quality of MRI. This article presents the design, test, and shimming of a 1.5-T head-only MRI superconducting magnet developed by the Wuhan National High Magnetic Field Center. The magnet consists of seven primary coils and two shielding coils and is operated at an operating current of 510 A using bath cooling. The test has shown that the magnet reached the target field of 1.5 T directly after the first ramp-up without any quench. Under the magnetic field of 1.5 T, the magnetic field decay rate of the magnet is less than 0.02 ppm/hr. After three rounds of passive shimming, the magnet achieves a magnetic field inhomogeneity of 2.89 ppm over an imaging sphere within a diameter of 26 cm. The successful development of this magnet provides practical engineering validation for the lightweight technology of head-only MRI superconducting magnets.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 6","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144213570","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

Developing a New DC-to-DC Converter for Ultra-Fast Charges of Electric Vehicles Using Superconducting Inductors Cooled With Liquid Hydrogen 基于液氢冷却超导电感的电动汽车超高速充电用dc - dc变换器的研究

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.2025.3549007

T. Yagai;Y. Makida;T. Shintomi;N. Hirano;T. Hamajima

{"title":"Developing a New DC-to-DC Converter for Ultra-Fast Charges of Electric Vehicles Using Superconducting Inductors Cooled With Liquid Hydrogen","authors":"T. Yagai;Y. Makida;T. Shintomi;N. Hirano;T. Hamajima","doi":"10.1109/TASC.2025.3549007","DOIUrl":"https://doi.org/10.1109/TASC.2025.3549007","url":null,"abstract":"Toward 2050 carbon neutral, an increasing number of Battery Electric Vehicles (BEVs) must be achieved to reduce CO2 emission out of the mobility section. One of the barriers for spreading BEV use is definitely long charging time. Shorter charging time would be realized with very high power, higher voltage and higher current. Although conventional chargers, which are based on AC-to-DC (ACDC) power converters, receiving power from utility grids shows technologically high efficiency, the overall efficiency from power generation to battery charge is NOT so high due to multiplied efficiencies through the power path going down, typically below 90%. DC-to-DC (DCDC) boost converter technology allows us not only to make good use of renewable energy but to achieve very high charging efficiency by the way of direct power receiving from renewable sources. The bottle neck for large current charging is the current capacity of conventional inductors, which would be drastically improved by replacing the normal inductor to “superconducting coil”. Our group has designed and demonstrated a superconducting DCDC (SCDCDC) double-boost converter to prove the excellent potential as ultra-fast charger providing high voltage with large currents. We designed the SCDCDC by using Bi2223 and MgB2 coils. The converter with the MgB2 inductor which has already demonstrated nominal operation with liquid hydrogen cooling in a previous research, showed high efficiencies larger than 95% up to 15 kW of output power operations with liquid helium cooling.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726403","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

Project Quality Management for the HL-LHC IT String HL-LHC IT生产线项目质量管理

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.2025.3548951

Nicolas Heredia Garcia;Marta Bajko;Sebastien Blanchard;Davide Bozzini;Oliver Brüning;Hector Garcia Gavela;Victor Guillen Humbria;Antoine Kosmicki;Estrella Vergara Fernandez;Samer Yammine;Markus Zerlauth

{"title":"Project Quality Management for the HL-LHC IT String","authors":"Nicolas Heredia Garcia;Marta Bajko;Sebastien Blanchard;Davide Bozzini;Oliver Brüning;Hector Garcia Gavela;Victor Guillen Humbria;Antoine Kosmicki;Estrella Vergara Fernandez;Samer Yammine;Markus Zerlauth","doi":"10.1109/TASC.2025.3548951","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548951","url":null,"abstract":"This article explores the project management quality standards required for leading complex technical projects involving state-of-the art superconducting technologies, diverse stakeholders and extensive installation, commissioning, and quality assurance/ control activities. Specifically, it presents the project management framework – including processes and best practices – implemented for the High-Luminosity Large Hadron Collider (HL-LHC) Inner Triplet (IT) String test stand at CERN. This facility evaluates the collective behavior of major components to be installed on one side of the upgraded HL-LHC interaction point. It will serve to apply and improve installation and hardware commissioning test procedures, and QA/QC processes. The paper details the documentation and tools used to ensure proper execution and compliance with stakeholder requirements, as well as the communication strategy for reporting progress. Additionally, the paper specifies the type of quality control checks applied in the test stand, the tools to follow the tests from a managerial perspective and the handling of associated non-conformities. Finally, it presents the strategy for disseminating lessons learned to the project stakeholders.","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":"143735418","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

Tooling Design, Coil Fabrication, and Prototype Coil Performance Verification for a 28 GHz Nb3Sn ECR Ion Source Magnet 28 GHz Nb3Sn ECR离子源磁体的模具设计、线圈制造和原型线圈性能验证

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.2025.3548023

Philip Mallon;Tengming Shen;Ye Yang;Ray Hafalia;Lianrong Xu;Jose Ferradas Troitiño;Mariusz Juchno;Paolo Ferracin;Soren Prestemon;Yoonhyuck Choi;Junwei Guo;Xiaoji Du;David Greene;Danlu Zhang;Junseong Kim;Tomofumi Maruta;Guillaume Machicoane;Ting Xu;Jie Wei

{"title":"Tooling Design, Coil Fabrication, and Prototype Coil Performance Verification for a 28 GHz Nb3Sn ECR Ion Source Magnet","authors":"Philip Mallon;Tengming Shen;Ye Yang;Ray Hafalia;Lianrong Xu;Jose Ferradas Troitiño;Mariusz Juchno;Paolo Ferracin;Soren Prestemon;Yoonhyuck Choi;Junwei Guo;Xiaoji Du;David Greene;Danlu Zhang;Junseong Kim;Tomofumi Maruta;Guillaume Machicoane;Ting Xu;Jie Wei","doi":"10.1109/TASC.2025.3548023","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548023","url":null,"abstract":"Worldwide several superconducting electron cyclotron resonance (ECR) ion sources have been developed and in operation for heavy ion accelerators using Nb-Ti magnets. To explore the use of high-field Nb<inline-formula><tex-math>$_{3}$</tex-math></inline-formula>Sn to break the field limit of Nb-Ti for ECR magnets, state-of-the-art Nb<inline-formula><tex-math>$_{3}$</tex-math></inline-formula>Sn coil fabrication techniques and tooling design must be used to address the challenging characteristics of Nb<inline-formula><tex-math>$_{3}$</tex-math></inline-formula>Sn conductors. Earlier we reported the overall magnet design, conductor selection, and conductor characterization for building a 28 GHz superconducting ECR ion source using Nb<inline-formula><tex-math>$_{3}$</tex-math></inline-formula>Sn sextupole coils for Facility for Rare Isotope Beams (FRIB). This paper describes the progress towards fabricating prototype Nb<inline-formula><tex-math>$_{3}$</tex-math></inline-formula>Sn sextupole coil. In particular, we present tooling design, Nb<inline-formula><tex-math>$_{3}$</tex-math></inline-formula>Sn sextupole coil fabrication, and a mirror magnet for performance verification.","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":"143735459","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

Preliminary Assessment of a Highly Flexible HTS Drive for Electric Aircraft 一种用于电动飞机的高柔性高温超导驱动器的初步评估

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.2025.3548617

Fábio Encarnação-Gregório;João Murta-Pina;Nuno Vilhena;Guilherme Santos;Mohammad Yazdani-Asrami;Wenjuan Song;Roberto Oliveira;Vitor Fernão Pires;Xavier Granados

{"title":"Preliminary Assessment of a Highly Flexible HTS Drive for Electric Aircraft","authors":"Fábio Encarnação-Gregório;João Murta-Pina;Nuno Vilhena;Guilherme Santos;Mohammad Yazdani-Asrami;Wenjuan Song;Roberto Oliveira;Vitor Fernão Pires;Xavier Granados","doi":"10.1109/TASC.2025.3548617","DOIUrl":"https://doi.org/10.1109/TASC.2025.3548617","url":null,"abstract":"The push for the Energy Transition and the electrification of emerging applications, particularly those that already include cryogenics, has stimulated new developments in electric machines with high-temperature superconducting (HTS) materials in their components. Electric aircraft enabled by HTS-based systems, such as motors and energy distribution cables, are highlighted among those applications. In this context, there is an urgent need for machines with specific powers ranging from 15 to 30 kW/kg, which can leverage the inherent compactness and low weight of HTS motors. This work presents an electromechanical drive built by an axial-flux type motor with an HTS rotor, where the latter uses HTS REBCO tapes. The drive enables the electronic changing of the number of magnetic poles generated by a double stator with conventional windings. Consequently, the rotor must dynamically reconfigure its distribution of currents in the tapes to adapt to different numbers of poles. The prototype of the polyphase power electronics converter for the drive is also introduced. It allows for generating 24 voltages with frequency, voltage, and phase shift defined by the user according to the desired number of poles. Despite its increased complexity, the converter and the motor allow for improved performance compared to conventional drives. Preliminary experimental results are presented to support the discussion and outline prospects for the proposed concept in the framework of electric aircraft applications.","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":"143748827","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

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

Dual-Rail Asynchronous Quantum Phase-Slip Logic Gates 双轨异步量子相滑逻辑门

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.2025.3567466

Babak Dastbarjan Boroujeni;Seyed Amir Hashemi;Satyabrata Jit

{"title":"Dual-Rail Asynchronous Quantum Phase-Slip Logic Gates","authors":"Babak Dastbarjan Boroujeni;Seyed Amir Hashemi;Satyabrata Jit","doi":"10.1109/TASC.2025.3567466","DOIUrl":"https://doi.org/10.1109/TASC.2025.3567466","url":null,"abstract":"Superconducting logic gates need synchronization clock in order to synchronize the inputs for performing the Boolean functions properly, i.e., the inputs should arrive to the gate and the output is valid when the clock is in the high state. However, for large-scale circuits, large clock routes impose limits on circuit design, such as clock skew, narrow timing tolerances, synchronization violation, and system integrity. Dual-rail topology for asynchronous logic circuit design overcomes these limits to a satisfactory level by eliminating the clocking routes and producing local clock pulses. In this article, design of the dual-rail asynchronous logic gates (<sc>and, <sc>or, and <sc>xor) based on the superconducting quantum phase slip (QPS) is represented. As the dual-rail topology adds extra elements to the final circuit in order to reduce the total number of elements, first, the timed QPS <sc>and, <sc>or, and <sc>xor gates, splitter, confluence buffer, and coincidence junction with a reduced number of elements are designed. Then, these elements are used to design the corresponding final dual-rail asynchronous QPS gates. Proper operation of the proposed asynchronous gates is investigated by simulation results. Finally, delay analysis is provided in order to estimate the operation frequency limit of the proposed asynchronous gates.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 4","pages":"1-9"},"PeriodicalIF":1.7,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143949143","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