IEEE Transactions on Applied Superconductivity最新文献_第9页

Solder-Free Low Resistive Joining of Metal Stabilization Layers of REBCO Coated Conductors by Use of Sonic-Welding Technique

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3541619

Shinya Sera;Takanobu Kiss;Zeyu Wu;Yusuke Oda;Kenji Suzuki;Kohei Higashikawa

{"title":"Solder-Free Low Resistive Joining of Metal Stabilization Layers of REBCO Coated Conductors by Use of Sonic-Welding Technique","authors":"Shinya Sera;Takanobu Kiss;Zeyu Wu;Yusuke Oda;Kenji Suzuki;Kohei Higashikawa","doi":"10.1109/TASC.2025.3541619","DOIUrl":"https://doi.org/10.1109/TASC.2025.3541619","url":null,"abstract":"We have developed a solder-free sonic welding technique for joining coated conductor tapes using only sonic energy. This method eliminates the need for surface treatments such as oxide film removal and avoids the use of intermediate metals like solder or indium foil. In this study, a joint resistivity of 17.3 nΩcm2 at 77 K, less than half that of typical solder joints, was achieved with solder-free sonic-welding process by using appropriate welding parameters and 15 kHz sonic vibration. Scanning Hall-probe microscopy (SHPM), which enables 2-D visualization of the critical current density (<inline-formula><tex-math>$J_{mathrm{c}}$</tex-math></inline-formula>) distribution in the joint area, was also used to confirm the soundness of the joints without local degradation. In addition, we proposed an analytical model to describe the joint resistivity as a function of welding parameters such as load, vibration amplitude and sonic energy based on a consideration of a physical model of the sonic-welding process. It has been demonstrated that the analytical model reproduces the experimental results quantitatively, allowing us to control the joint resistivity and to understand the dominant factors in the sonic-welding process, which has been difficult to achieve in the past.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10885531","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143553363","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

Development of a ReBCO Non/Metal-Insulated 40 T Solenoid for a Muon Collider

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3534162

B. Bordini;C. Accettura;A. Bertarelli;L. Bottura;A. Dudarev;M.A. Hafiz;A. Kolehmainen;T. Mulder;D. Rinaldoni;F. Sanda;G. Vernassa;A. Verweij;M. Wozniak

{"title":"Development of a ReBCO Non/Metal-Insulated 40 T Solenoid for a Muon Collider","authors":"B. Bordini;C. Accettura;A. Bertarelli;L. Bottura;A. Dudarev;M.A. Hafiz;A. Kolehmainen;T. Mulder;D. Rinaldoni;F. Sanda;G. Vernassa;A. Verweij;M. Wozniak","doi":"10.1109/TASC.2025.3534162","DOIUrl":"https://doi.org/10.1109/TASC.2025.3534162","url":null,"abstract":"In the quest to explore the fundamental properties of particles at the energy frontier, the International Muon Collider Collaboration (IMCC) has made significant progress in the conceptual design study of a Muon Collider (MC). Central to this effort is the development of the various MC's magnet systems, particularly the Ultra-High-Field (UHF) solenoids needed for the MC final cooling stage. For this purpose, CERN recently presented a conceptual design of a 40 T solenoid characterized by very compact coils. This fully superconducting magnet, featuring a 50 mm free bore and requiring 1% field homogeneity over 0.5 m length, is designed to operate at 4.2 K using ReBCO tapes. The solenoid comprises several tens of Non/Metal-Insulated (N/M-I) single pancakes. The pancakes are axially stacked one over the other and supported radially by a stiff mechanical structure that also applies a 200 MPa radial precompression to counter the Lorentz force-induced stresses. Except for a few pancakes at the magnet extremities, all the pancakes are identical and have a winding outer radius of 90 mm. In this paper we present an overview of the various ongoing activities at CERN to realize this ambitious project. Key highlights include the procurement and characterization of conductors, the development of specialized tools for manufacturing the pancakes and for testing the feasibility of applying significant radial precompression to them. Additionally, we discuss the progress in developing mechanical and thermal electro-dynamic models for the 40 T solenoid, strategies for its protection in various quench scenarios, and advancements in solenoid manufacturing technologies.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688114","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 the Protection System for JT-60SA Superconducting Magnet Against Vacuum Degradation

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3535687

K. Fukui;V. Tomarchio;A. Jokinen;S. Davis;E. Di Pietro;G. Phillips;M. Wanner;Y. Shibama;K. Hamada

{"title":"Development of the Protection System for JT-60SA Superconducting Magnet Against Vacuum Degradation","authors":"K. Fukui;V. Tomarchio;A. Jokinen;S. Davis;E. Di Pietro;G. Phillips;M. Wanner;Y. Shibama;K. Hamada","doi":"10.1109/TASC.2025.3535687","DOIUrl":"https://doi.org/10.1109/TASC.2025.3535687","url":null,"abstract":"The JT-60SA project succeeded in commissioning test toward the first plasma in 2023 under a framework: the Satellite Tokamak Programme of the Broader Approach Agreement between EU and Japan (H. Shirai et al., 2016). JT-60SA is a tokamak type magnetic confinement device with a superconducting magnet system (Y. Koide et al., 2015) developed and operated at the Quantum Science and Technology institute (QST) in Japan. The magnet system consists of 18 Toroidal Field coils, 6 Equilibrium Field coils, and 4 modules of Central Solenoids, and all the coils are superconducting magnets. In the first commissioning, during 2020 - 2021, JT-60SA has experienced a discharge incident at the EF1 magnet (H. Shirai et al., 2024). As a conclusion of the investigation of the incident, it turned out that the insulation resistance of the magnet system was insufficient. Although the insulation was partly reinforced, the voltage holding under accidentally arising Paschen conditions was not improved enough for the recent operation (OP-1, 2023) (K. Hamada et al., 2024). To prevent the magnet system from discharging during vacuum degradation, a vacuum monitoring system must be prepared to detect vacuum degradation and ramp down the magnet current immediately in case of unexpected vacuum degradation. In this article, the development of the vacuum monitoring system, operational results, and the future plan of the system will be described.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465780","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

Controlled Shifts Of X-Ray Emission Lines Measured With Transition Edge Sensors at the Advanced Photon Source

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3540045

Tejas Guruswamy;Orlando Quaranta;Lisa Gades;Umeshkumar Patel;Antonino Miceli

{"title":"Controlled Shifts Of X-Ray Emission Lines Measured With Transition Edge Sensors at the Advanced Photon Source","authors":"Tejas Guruswamy;Orlando Quaranta;Lisa Gades;Umeshkumar Patel;Antonino Miceli","doi":"10.1109/TASC.2025.3540045","DOIUrl":"https://doi.org/10.1109/TASC.2025.3540045","url":null,"abstract":"The measurement of shifts in the energy of X-ray emission lines is important for understanding the electronic structure and physical properties of materials. In this study, we demonstrate a method using a synchrotron source to introduce controlled eV-scale shifts of a narrow line in between fixed-energy fluorescence lines. We use this to characterize the ability of a hard X-ray superconducting Transition Edge Sensor (TES) array to measure line shifts. Fixed fluorescence lines excited by higher harmonics of the monochromatic X-ray beam are used for online energy calibration, while elastic scattering from the primary harmonic acts as the variable energy emission line under study. We use this method to demonstrate the ability to track shifts in the energy of the elastic scattering line of magnitude smaller than the TES energy resolution, and find we are ultimately limited by our calibration procedure. The method can be applied over a wide X-ray energy range and provides a robust approach for the characterization of the ability of high-resolution detectors to detect X-ray emission line shifts, and the quantitative comparison of energy calibration procedures.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143465562","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

Charging Speed Optimization of Non-Insulation REBCO Coils by Tuning Turn-to-Turn Resistivity Distribution

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3530901

Chengyun Pan;Li Lu;Mengzhu Li;Qiyu Wang;Xin Yu;Xiaofen Li;Zhijian Jin;Wei Wu

{"title":"Charging Speed Optimization of Non-Insulation REBCO Coils by Tuning Turn-to-Turn Resistivity Distribution","authors":"Chengyun Pan;Li Lu;Mengzhu Li;Qiyu Wang;Xin Yu;Xiaofen Li;Zhijian Jin;Wei Wu","doi":"10.1109/TASC.2025.3530901","DOIUrl":"https://doi.org/10.1109/TASC.2025.3530901","url":null,"abstract":"The non-insulation (NI) high-temperature superconducting coils are widely used due to their high current-carrying density, high thermal stability, and self-protection features. However, in engineering applications, the primary challenge associated with NI coils is charging delay, alongside two additional issues: 1) In a closed-loop NI coil, once the persistent Current Switch (PCS) transitions to the superconducting state, the redistribution of azimuthal current complicates the determination of the steady-state operating current and 2) Under specific turn-to-turn resistivity distributions, a significant reverse azimuthal current will occur during charging, increasing the risk of coil damage. These issues stem from the uneven distribution of turn-to-turn current in NI coils. Therefore, in this article, an ideal spatial distribution of turn-to-turn resistivity is proposed through analytical equations, ensuring that the azimuthal current remains equal during the charging process, thereby accelerating the charging and discharging speed, suppressing the process of azimuthal current redistribution after the closed-loop coil PCS enters the superconducting state, quickly entering a stable closed-loop operation state, and avoiding the occurrence of large reverse azimuthal current during charging.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-7"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143512908","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

Analysis of Wireless Power Transfer via High Temperature Superconductor Coils

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3539253

Maria Letizia Orsi;Karla N. Herrera Guzman;William Lo;Marco Breschi;Federico Scurti

{"title":"Analysis of Wireless Power Transfer via High Temperature Superconductor Coils","authors":"Maria Letizia Orsi;Karla N. Herrera Guzman;William Lo;Marco Breschi;Federico Scurti","doi":"10.1109/TASC.2025.3539253","DOIUrl":"https://doi.org/10.1109/TASC.2025.3539253","url":null,"abstract":"Wireless power transfer (WPT) systems have become a commercial technology for applications such as recharging of low-power electronic consumer devices. This technique has potential for implementations where larger power transfers are required. For moderate distance applications, the most widely used method of WPT is inductive coupling. This article aims to harness the unique properties of YBa2Cu3O7-x to improve the quality factor of a system of magnetically coupled resonant coils. This research focuses on the investigation of inductive coupling and electrical power transfer within a WPT system made up of a single pancake high-temperature superconductor (HTS) coil acting as the transmitter and a pancake copper coil acting as the receiver. Results show that the efficiency of the WPT system comprising the superconducting coil is up to a factor of 10 times higher than that of conventional magnetically coupled resistive coils in resonance. In addition, the trend of efficiency with coil distance is consistent with expectations. The performance of the entire system at various frequencies and distances is characterized via dedicated experiments.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-6"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143676122","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

Transient Analysis of Flux Weakening Operation for Synchronous Motor Considering NI HTS Field Coil Behaviors

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3537946

Jonghoon Yoon;JuKyung Cha;Jeonghwan Park;Jaheum Koo;Seungyong Hahn

引用次数: 0

Application of Flex-QA Arrays in HTS Magnet Testing

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3534179

Stoyan Stoynev;Vadim V. Kashikhin;Sean Cohan;Joe DiMarco;Oliver Kiemschies;Steve Krave;Nghia Mai;Umesh Sambangi;Venkat Selvamanickam

引用次数: 0

A Novel Topology With the Combination of Superconducting Magnet and Permanent Magnet for the Propulsion Motor of eVTOL Aircraft

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3537066

Xinhong Gao;Yuanzhi Zhang;Haiyang Fang;Dawei Li;Yi Cheng;Ronghai Qu

{"title":"A Novel Topology With the Combination of Superconducting Magnet and Permanent Magnet for the Propulsion Motor of eVTOL Aircraft","authors":"Xinhong Gao;Yuanzhi Zhang;Haiyang Fang;Dawei Li;Yi Cheng;Ronghai Qu","doi":"10.1109/TASC.2025.3537066","DOIUrl":"https://doi.org/10.1109/TASC.2025.3537066","url":null,"abstract":"The high-temperature superconducting (HTS) tape can bring significant improvement to the performance of electric vertical take-off and landing (eVTOL) aircraft's propulsion motor. However, it requires cryogenic environment to function normally, which causes a huge amount of cryogenic loss. Meanwhile, the motor outputs different levels of torque during a flight mission and the difference can be up to tens of time. In this paper, permanent magnet auxiliary excitation structure (PMAES) is investigated for eVTOL aircraft's propulsion motor. In the proposed design, superconducting magnet (SM) is utilized as main excitation unit to achieve a higher torque density while permanent magnet (PM) is adopted to form PMAES. SM and PMAES operate during machine's high-load condition, and SM is shut off during the low-load condition to eliminate loss caused by the operation of SM's current lead. With such a structure, the HTS material can be utilized to extract the optimal performance of the machine while reducing the cryogenic losses when possible. Four topologies with PMAES are studied, and it is found axial flux superconducting machine (AFSCM) with radial permanent magnet auxiliary excitation structure (RPMAES) has the best performance and ability to significantly reduces the energy consumption of the motor during a complete flight mission.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438534","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

Short Circuit Analysis of a Fully Superconducting 10 MW Wind Generator

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-13 DOI: 10.1109/TASC.2025.3537948

Jannis Sindram;Matthias Kalla;Sebastian Lengsfeld;Marco Jung

引用次数: 0