IEEE Transactions on Applied Superconductivity最新文献_第3页

Individual Evaluation of REBCO/Ag and Ag/Cu Interfacial Resistivities Inside Copper-Stabilized REBCO Tapes

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-09 DOI: 10.1109/TASC.2024.3512534

Koichi Sato;Satoshi Ito;Yosuke Atake;Yuji Tsuchiya;Kohki Takahashi;Hidetoshi Hashizume

{"title":"Individual Evaluation of REBCO/Ag and Ag/Cu Interfacial Resistivities Inside Copper-Stabilized REBCO Tapes","authors":"Koichi Sato;Satoshi Ito;Yosuke Atake;Yuji Tsuchiya;Kohki Takahashi;Hidetoshi Hashizume","doi":"10.1109/TASC.2024.3512534","DOIUrl":"https://doi.org/10.1109/TASC.2024.3512534","url":null,"abstract":"The interfacial resistance at REBCO/Ag and Ag/Cu interfaces inside Rare-earth Barium Copper Oxide (REBCO) tapes is the main factor of joint resistance for well-fabricated copper-stabilized REBCO tape joints. There is no studies for individual evaluation of these two interfacial resistivities (interfacial resistance for unit area) in the same REBCO tape, though the individual resistance behavior is important for in-depth analysis of temperature and magnetic field dependence of the intrinsic resistance of REBCO tapes. In this study, we evaluated these two interfacial resistivities individually at 77 K and self-field with the contact-probing current transfer length (CTL) method. Numerical analysis showed that the individual evaluation is impossible by applying the method to copper-stabilized REBCO tapes. Therefore, first we measured the sum of interfacial resistivity at both the REBCO/Ag and Ag/Cu interfaces with a copper-stabilized REBCO tape, then measured that at the REBCO/Ag interface with the same REBCO tape whose Cu layer was removed etching solution. Experimental results indicated that the interfacial resistivity at the REBCO/Ag interface is smaller than that at the Ag/Cu interface. The temperature and magnetic field dependence of these two interfacial resistivities were also analyzed based on the results at 10–70 K and 0–15 T. The interfacial resistivity at the REBCO/Ag interface behaves similar to normal-conducting resistance of REBCO. This indicates that normal-conducting REBCO near the REBCO/Ag interface possibly affects the temperature and magnetic field dependence of the interfacial resistance.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875083","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

Phase Evolution and Area Fractions of Coarse-Grain and Fine-Grain A15 in APC Nb3Sn Superconductors

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-09 DOI: 10.1109/TASC.2024.3513941

Fang Wan;Xingchen Xu;Xuan Peng;Michael. D. Sumption

{"title":"Phase Evolution and Area Fractions of Coarse-Grain and Fine-Grain A15 in APC Nb3Sn Superconductors","authors":"Fang Wan;Xingchen Xu;Xuan Peng;Michael. D. Sumption","doi":"10.1109/TASC.2024.3513941","DOIUrl":"https://doi.org/10.1109/TASC.2024.3513941","url":null,"abstract":"Previous studies have shown that APC Nb\u00003\u0000Sn strands based on the internal oxidation of Nb-Ta-Zr or Nb-Ta-Hf alloys had higher non-Cu critical current density (\u0000<italic>Jc\u0000s) than the state-of-the-art strands at high fields (e.g., ≥ 12 T) while having lower non-Cu \u0000<italic>Jc\u0000s at low fields (e.g., ≤ 5 T), which helps to reduce the undesired persistent-current magnetization. Moreover, APC strands reacted at lower temperature tend to have flatter \u0000<italic>Jc\u0000(\u0000<italic>B\u0000) curves, possibly allowing the targeting of even better \u0000<italic>Jc\u0000 performance at high fields, while at the same time suppressing \u0000<italic>Jc\u0000s at low fields. However, it is required that APC strands attain large fine-grain (FG) area fractions and suppressed coarse-grain (CG) area fractions at low reaction temperature. In this work, the influence of reaction temperature on the evolution of FG and CG Nb\u00003\u0000Sn phases in APC Nb\u00003\u0000Sn strands was investigated. Our goal is to find more effective methods to increase the FG area fraction as well as the overall performance of APC strands.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875113","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

Process Induced Texturing in Ex-Situ Magnesium Diboride Based Wires

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-09 DOI: 10.1109/TASC.2024.3512526

Alberto Ansaldo;Sergio Marras;Paola Mauceri;Tiziana Spina;Andrea Tumino

引用次数: 0

Development of Fe(Se,Te) Coated Conductors by PLD Process for High Magnetic Field Applications

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-09 DOI: 10.1109/TASC.2024.3511534

Linfei Liu;Yijie Li;Shaojing Mou;Chaohang Miao;Rongji Zhu;Ruojie Li;Jiachao Ye

{"title":"Development of Fe(Se,Te) Coated Conductors by PLD Process for High Magnetic Field Applications","authors":"Linfei Liu;Yijie Li;Shaojing Mou;Chaohang Miao;Rongji Zhu;Ruojie Li;Jiachao Ye","doi":"10.1109/TASC.2024.3511534","DOIUrl":"https://doi.org/10.1109/TASC.2024.3511534","url":null,"abstract":"Iron-chalcogenide superconductors are a fascinating group within the family of iron-based superconductors, known for their non-toxic, simple crystal structures, less anisotropy and high critical current density. Fe(Se,Te) films have been realized on flexible metal substrates, and the Fe(Se,Te) coated conductors have high critical current density \u0000<italic>J\u0000c\u0000 at 4.2 K under magnetic fields as high as 25 T. This makes them promising for high field applications at liquid helium temperature. For applications, the continuous fabrication of Fe(Se,Te) coated conductors is a key. Here, the Fe(Se,Te) coated conductors were developed through multi-turn pulsed laser deposition on CeO\u00002\u0000 buffered ion-beam-assisted deposition MgO tape. The effect of parameters on the properties of the Fe(Se,Te) films were systematically studied, such as substrate temperature and target-substrate distance. Under the optimum process, high performance Fe(Se,Te) film was successfully fabricated with critical current density of 0.8 MA/cm\u00002\u0000 at 4.2 K and 12 T. So far, 10 m and 100 m class Fe(Se,Te) coated conductors have been successfully fabricated in Shanghai Jiao Tong university. 120 m long FST coated conductor with \u0000<italic>T\u0000c\u0000 of about 14 K and \u0000<italic>J\u0000c\u0000 of 0.83 MA/cm\u00002\u0000 at 4.2 K and 10 T was obtained, which demonstrates the fabrication of long Fe(Se,Te) coated conductor with high performance.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-4"},"PeriodicalIF":1.7,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875137","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 and Testing of a Superconducting Ground Plane on Transition Edge Sensors

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-05 DOI: 10.1109/TASC.2024.3511545

Miriam Marino;Ayshea Banes;C. V. Ambarish;Haiyue Duan;Felix T. Jaeckel;Natalie Lesnjak;Dan McCammon;Sophia Nowak;Avirup Roy;Sixing Xu;Jiacheng Yan

{"title":"Development and Testing of a Superconducting Ground Plane on Transition Edge Sensors","authors":"Miriam Marino;Ayshea Banes;C. V. Ambarish;Haiyue Duan;Felix T. Jaeckel;Natalie Lesnjak;Dan McCammon;Sophia Nowak;Avirup Roy;Sixing Xu;Jiacheng Yan","doi":"10.1109/TASC.2024.3511545","DOIUrl":"https://doi.org/10.1109/TASC.2024.3511545","url":null,"abstract":"Much of the normal matter in the universe is thought to exist as diffuse hot gas near 1.0 × 10\u00006\u0000 K, which can be detected through its 0.1–0.5 keV line emission. Distinguishing among multiple temperature regions and emission mechanisms along a line of sight requires resolving individual spectral lines in this particularly crowded spectral range. This requires 1–2 eV spectral resolution, which is currently only possible using grating spectrometers, which are suitable only for point sources, but not for the diffuse sources we wish to observe. We aim to measure individual spectral lines in this energy band using transition edge sensors (TES) that have the required 1–2 eV non-dispersive spectral resolution on a sounding rocket. While TESs offer sufficient energy resolution, they are very sensitive to ambient magnetic fields, e.g. from earth’s field and stray fields from the adiabatic demagnetization refrigerator (ADR) that is used to cool TESs to their \u0000<inline-formula><tex-math>$sim$</tex-math></inline-formula>\u000070 mK transition temperature. Strict space and weight limitations on the sounding rocket payload will limit the use of conventional high permeability magnetic shielding. Further design challenges arise in designing shielding with at least a 45\u0000<inline-formula><tex-math>$^{circ }$</tex-math></inline-formula>\u0000 field of view, which is required to maintain a large enough throughput to obtain a useful spectrum on a brief (\u0000<inline-formula><tex-math>$sim$</tex-math></inline-formula>\u0000300 s) sounding rocket flight. Here we explore adding a superconducting ground plane (SGP) to the backside of the TES to reduce its field sensitivity and minimize attenuation requirements for the external shielding, which is based on prior work from (de Wit et al. 2022). We tested the feasibility of SGPs with novel materials, geometries, and on larger TESs with different biasing conditions.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142880459","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

Mechanical Performance and Deformation of HTS Cable With Cyclic Electromagnetic Thermal Coupling Process

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-04 DOI: 10.1109/TASC.2024.3511555

Gaotai Lyu;Yutaka Terao;Hiroyuki Ohsaki

{"title":"Mechanical Performance and Deformation of HTS Cable With Cyclic Electromagnetic Thermal Coupling Process","authors":"Gaotai Lyu;Yutaka Terao;Hiroyuki Ohsaki","doi":"10.1109/TASC.2024.3511555","DOIUrl":"https://doi.org/10.1109/TASC.2024.3511555","url":null,"abstract":"To cope with various superconducting applications, the superconducting tapes in high-temperature superconducting (HTS) cables adopt different winding methods considering material properties and electromagnetic performance. AC or DC HTS power transmission cables used in large quantities are usually spirally wound, and the superconducting tape is stressed during the winding process. To evaluate the influence of electromagnetic factors and contact forces on HTS tapes in the cable generated by electromagnetic field and temperature variation, a theoretical analysis of the stress on the superconducting tape and HTS cable is performed. Based on the electromagnetic-thermal coupling finite element analysis model, MATLAB/COMSOL is used to jointly simulate the stress and strain conditions. The COMSOL electromagnetic-thermal model outputs electromagnetic and temperature parameters for stress and strain simulation. After mechanical simulation, the resulting changes in geometric parameters will be returned to the electromagnetic-thermal model. In this process, the critical current of tapes is affected by the magnetic field, temperature, and stress and is updated iteratively between models. The coupling model established in this study can be used to analyze mechanical performance of HTS cables under overcurrent and overtemperature conditions with different cases such as aircraft electrical power transmission, as well as to evaluate short-term safety and long-term reliability in the future.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875073","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

Enhancing Range of Transmittable Power by Introduction of Double Damper Superconducting Generator Into Long-Distance Power Transmission

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-04 DOI: 10.1109/TASC.2024.3511551

Satoshi Sakurai;Raito Sawayama;Orie Sakamoto

{"title":"Enhancing Range of Transmittable Power by Introduction of Double Damper Superconducting Generator Into Long-Distance Power Transmission","authors":"Satoshi Sakurai;Raito Sawayama;Orie Sakamoto","doi":"10.1109/TASC.2024.3511551","DOIUrl":"https://doi.org/10.1109/TASC.2024.3511551","url":null,"abstract":"To realize carbon neutral society, introduction of renewable energies in power systems has been promoted. As the number of inverter-based resources for photovoltaic (PV) and wind power generation increases and they replace synchronous generators, reduction of synchronizing power and resultant decrease of power system stability have been concerned. Meanwhile, superconducting generators (SCGs) with high temperature superconductors cooled by liquid hydrogen have been actively studied in Japan. SCGs are prospected to provide large synchronizing power owing to low synchronous reactance. In this paper, enhancement of synchronizing power by introducing double damper SCGs is discussed. For evaluation of synchronizing power, range of transmittable power and critical clearing time were investigated in a long-distance double-machine system through electromagnetic transient analyses. Double damper SCGs with machine constants differently designed in a current project were examined along with a single damper SCG designed in a previous project. Results showed that large synchronizing power of double damper SCGs enhances transmittable power range and critical clearing time, and thus double damper SCGs are able to offer flexibility to deal with wider variety of power flow changed by renewable energies.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875110","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

Thermal Stability of BaK122 Superconducting Bulks in Sealed Conditions

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-02 DOI: 10.1109/TASC.2024.3509827

Xinyuan Liu;Xianping Zhang;Chiheng Dong;Minghui Tang;Dongliang Wang;Yanwei Ma

{"title":"Thermal Stability of BaK122 Superconducting Bulks in Sealed Conditions","authors":"Xinyuan Liu;Xianping Zhang;Chiheng Dong;Minghui Tang;Dongliang Wang;Yanwei Ma","doi":"10.1109/TASC.2024.3509827","DOIUrl":"https://doi.org/10.1109/TASC.2024.3509827","url":null,"abstract":"The thermal stability of BaK122 is a critical parameter for practical applications, such as in the fabrication of the superconducting joint, the re-sintering of the coil, etc. Therefore, study on the thermal stability of BaK122 at high temperatures is necessary. In this work, thermal stability of the BaK122 superconducting bulks was investigated under various sealed conditions. It is found that significant FeAs impurity is formed on the surface of BaK122 samples sintered at 800 °C, while unknown impurities emerge at 900 °C. Specifically, FeAs is distributed within ∼0.2 mm of the surface for the samples sintered at 900 °C, whereas unknown phases are within ∼0.1 mm. Increasing the sintering spatial density will suppress surface phase decomposition and obviously improve superconductivity of the samples. The decomposition of BaK122 is primarily induced by K loss. The introduction of elemental K in a sealed environment will effectively restrain surface decomposition and have a moderate impact on superconductivity of BaK122. The mechanisms of BaK122 decomposition in sealed conditions were summarized based on the experiment results.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844422","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

Ternary Digital Output Data Link From SFQ Circuits

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-02 DOI: 10.1109/TASC.2024.3510520

Yerzhan Mustafa;Seluk Kse

引用次数: 0

Signal Integrity Simulations of 4JL Gate Pulses From 4 K to 50 K 从 4 K 到 50 K 的 4JL 栅极脉冲信号完整性模拟

IF 1.7 3区物理与天体物理

IEEE Transactions on Applied Superconductivity Pub Date : 2024-12-02 DOI: 10.1109/TASC.2024.3510518

Keith Krause;Yerzhan Mustafa;Archit Shah;Selçuk Köse;Michael C. Hamilton

引用次数: 0