Article
Physics, Applied
J. V. J. Congreve, A. R. Dennis, Y. Shi, C. W. Bumby, H. Druiff, D. A. Cardwell, J. H. Durrell
Summary: (English Summary:)
The production of large (RE)Ba-Cu-O single grains is limited by slow grain growth process and limited post-processing techniques. By using single grain YBCO-Ag as an interface medium, a quick and effective joining technique is developed, enabling the production of multiple composite grains with comparable superconducting properties.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
S. Y. Gao, S. J. Shi, X. S. Yang, B. Y. Shen, X. B. Hu, Y. P. Zhu, B. H. Wu, Y. Zhao
Summary: This work reports the fabrication of REBCO HTS coil using in-situ winding technology. The six-layer coil achieved a high total current and generated a strong magnetic field at low temperature. The in-situ winding technology shows great potential for large-scale high-field magnets in next-generation fusion reactors.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Multidisciplinary
Moe M. Aye, Elmeri Rivasto, Mukarram Z. Khan, H. Rijckaert, H. Palonen, H. Huhtinen, Isabel Van Driessche, P. Paturi
Summary: The use of 50nm thick layers in multilayer structures increases J(c) by up to 40% compared to single layer BZO-doped films, with the best performance observed at high magnetic fields and temperatures, making them attractive for various electrical power applications in the future.
NEW JOURNAL OF PHYSICS
(2021)
Article
Chemistry, Inorganic & Nuclear
Radu Jubleanu, Dumitru Cazacu
Summary: With the development of renewable energy sources, superconducting magnet energy storage (SMES) devices are becoming increasingly popular. This study compares the energy storage performance of a toroidal modular superconducting coil using two different superconducting materials, bismuth strontium calcium copper oxide (BSCCO) and yttrium barium copper oxide (YBCO), through numerical analysis. The results show that increasing the critical current of BSCCO can reduce the dimensions of the torus while maintaining the same stored energy. In addition, to maximize energy storage, the thickness of the torus modules should be minimized and the major radius of the torus should be as small as possible.
Article
Physics, Applied
E. Trabaldo, A. Garibaldi, F. Lombardi, T. Bauch
Summary: The use of oxygen electromigration on YBa2Cu3O7-delta nanowires can tune their electrical properties, which is applied to YBCO nanowire-based SQUIDs. The electromigration processes, both DC and AC, have been found to improve SQUIDs performance, with the best results obtained through AC biased electromigration.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Etienne Rochepault, Paolo Ferracin, Giorgio Vallone
Summary: In this study, design concepts for high field dipoles in high energy particle colliders are explored. A hybrid configuration using both high temperature superconductors and low temperature superconductors is proposed for achieving relatively compact 20 T magnets. By optimizing the magnetic design and stress management, improvements in field quality and stress reduction on the high temperature superconductors are achieved.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Physics, Applied
Junwen Wei, Ziyi Huang, Zhiwen Lei, Qiong Wu, Yifan Wang, Xuyang Kang, Zi Li, Zhiyong Yan, Yufan Yan, Donghui Jiang, Timing Qu, Yunfei Tan
Summary: In this paper, a new analytical method based on pressure is proposed to analyze the formation conditions and spatial distribution of helium gas bubbles levitation for the development of high field superconducting magnet. Additionally, a no-insulation REBCO insert coil was developed to study the phenomenon of helium gas bubbles levitation. The analytical method was used to simulate the formation conditions of helium gas bubbles levitation and the temperature distribution of the REBCO insert.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Zhihao Wu, Jianxun Jin, Boyang Shen, Luning Hao, Youguang Guo, Jianguo Zhu
Summary: This article presents the fundamental design and modeling of a superconducting magnet for a high-speed maglev train using high-temperature superconductors. The design and modeling were verified through experimental tests and further investigation using a professional model based on the finite element method. The study focuses on understanding and analyzing the electromagnetic performance and physical phenomena of the high-temperature superconductor magnet.
Article
Physics, Applied
Sigrid Holleis, Ilya A. Shipulin, Ruben Huehne, Johannes Bernardi, Michael Eisterer
Summary: Coated conductors based on REBCO are a viable alternative to conventional superconductors. The introduction of artificial pinning centers, such as BHO nanoparticles, can enhance their performance. However, granularity remains a limitation, which can be improved with BHO doping.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Yaohui Wang, Jianhua Liu, Benzhe Zhou, Kangshuai Wang, Hui Liu, Hui Wang, Shunzhong Chen, Feng Liu, Weimin Wang, Qiuliang Wang
Summary: Significant scientific breakthroughs often arise from research conducted under extreme conditions. We have successfully created the world's first high-temperature superconducting (HTS) NMR experimental instrument, which will significantly support basic scientific research.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Upendra Prasad, Piyush Raj, Anees Bano, Arun Panchal, Deven Kanabar, R. Srinivasan
Summary: The application of different electrical insulation in superconducting solenoid coils was studied. The experiments showed that electrical insulation has an impact on the current ramp rate and voltage profiles. The coils produced a magnetic field of 0.2 Tesla at a working temperature of 10K. Additionally, the joint resistance of the coils was measured and analyzed.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Tomoyuki Koga, Ryuya Ando, Hiroyuki Watanabe, Shotaro Nakajima, Tomoo Chiba
Summary: A test cryostat with a conduction-cooled MgB2 superconducting bias magnet has been developed and demonstrated, which is more environmentally friendly and user-friendly compared to conventional cryostats. The consumption of liquid helium is reduced by almost half due to the self-cooling feature of the MgB2 magnet. The ramp-up rate of the bias magnet has also been significantly improved to 1 A/s, making it almost 10 times faster than previous NbTi magnets.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Energy & Fuels
Wafa Ali Soomro, Youguang Guo, Haiyan Lu, Jianguo Zhu, Jianxun Jin, Boyang Shen
Summary: High-temperature superconductor (HTS) bulks have shown great potential for industrial applications due to their ability to trap higher magnetic fields compared to traditional permanent magnets. However, current studies on the electromagnetic characterization of HTS have only focused on alternating AC magnetic fields and AC loss, neglecting the rotating magnetic fields.
Review
Nanoscience & Nanotechnology
Judith L. MacManus-Driscoll, Stuart C. Wimbush
Summary: This review discusses processing methods for the fabrication of REBCO (REBa2Cu3O7-delta) coated conductors, investigating the relation between performance and fabrication method, reviewing existing and new routes to improved performance and outlining emerging and future applications.
NATURE REVIEWS MATERIALS
(2021)
Article
Physics, Applied
Yu Chen, Pengfei Zheng, Tong Che, Wei Qian, Xiaoyuan Chen, Shan Jiang, Boyang Shen
Summary: Benefiting from high critical temperature and current, second-generation high-temperature superconducting tapes are widely used in large-scale magnet applications. This study proposes a temperature-dependent model for the joint resistance of these tapes, which matches well with experimental and analytical results. The model can provide accurate references for designing superconducting joints and early warnings for over-current conditions.
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
(2022)
Article
Physics, Applied
X. Hu, A. A. Polyanskii, D. Abraimov, A. Gavrilin, H. W. Weijers, F. Kametani, J. Jaroszynski, D. C. Larbalestier
Summary: The industrial production of REBa2Cu3O7-delta (REBCO) coated conductors has enabled the construction of a 32 T magnet, which is the first all-superconducting user magnet to exceed 30 T. In this study, the damage that occurred in the prototype coil during late-stage testing was analyzed. It was found that the damage was caused by fluctuations in vortex pinning density, which resulted in localized regions with low critical current (I-c) and intense heating.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
Y. Oz, D. Davis, J. Jiang, E. E. Hellstrom, D. C. Larbalestier
Summary: Bi-2212 is the only high field, high-temperature superconductor available in a macroscopically isotropic, multifilament round wire form capable of generating high uniformity fields. However, the heat treatment that enables high J ( c ) values also produces filament bonding which enhances losses. Twisting reduces some losses but is less effective in reducing losses from bonding. Recent research shows that high J ( c ) Bi-2212 wires with reduced bonding can significantly improve transport J ( c ) and lower losses, supporting the production of high field, low loss HTS magnets made with Bi-2212 wires.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Applied
J. Jaroszynski, A-M Constantinescu, G. Miller, A. Xu, A. Francis, T. Murphy, D. C. Larbalestier
Summary: Detailed knowledge of the full angular and wide temperature range characterization of the critical current I-c of REBCO coated conductors (CC) is crucial for the design of REBCO-based magnets. However, obtaining such data is expensive and difficult using traditional methods. This study presents J(c)(B,T,theta) results for a set of CC samples, highlighting the importance of considering the diverse properties of the samples when designing magnets.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Jeseok Bang, Seong Hyeon Park, Jeonghwan Park, Geonyoung Kim, Jung Tae Lee, Kwangmin Kim, Seungyong Hahn, David C. Larbalestier
Summary: This paper presents a system for real-time monitoring spatial and temporal electromagnetic behaviors of a high temperature superconductor (HTS) coil. The system consists of Hall sensors and voltage taps to measure spatial and temporal magnetic fields, and local voltages. The feasibility of the system is validated through simulations and experimental comparisons.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Engineering, Electrical & Electronic
Jianyi Jiang, S. Imam Hossain, Shaon Barua, T. Abiola Oloye, Jozef Kvitkovic, Fumitake Kametani, Ulf P. P. Trociewitz, Eric E. E. Hellstrom, David C. C. Larbalestier, Daniel E. E. Bugaris, Claudia Goggin, Yibing Huang, Jeff A. A. Parrell, Tengming Shen
Summary: Bi-2212 is the only high temperature superconducting wire with a round geometry. Its performance depends on powder quality, conductor fabrication, and heat treatment. We report on the performance and microstructure variation of wires made with powders produced by Engi-Mat in recent years.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Materials Science, Multidisciplinary
Chiara Tarantini, Temidayo Abiola Oloye, S. Imam Hossain, Fumitake Kametani, Jianyi Jiang, Eric E. Hellstrom, David C. Larbalestier
Summary: Bi2Sr2CaCuOx (Bi-2212) is a high-T-c superconductor that shows promise for high-field applications. The critical current density (Jc) of Bi-2212 wires, fabricated using the powder-in-tube technique, depends on the heat treatment process. In this study, magnetic characterization techniques were used to analyze the microstructure and superconducting properties of differently processed Bi-2212 wires. The results show that the supercurrent flows at the filament bundle level, and the intergrain and intragrain superconducting properties contribute to the overall performance.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Grant Lumsden, Sarat Singamneni, Bart Ludbrook, Huub Weijers, Rodney A. Badcock
Summary: The Robinson Research Institute at Victoria University Wellington is constructing superconducting motors to showcase technology pathways for the transport industry, specifically aviation. These motors feature rotor-mounted superconducting field coils and a superconducting stator in an air-core configuration. The study explores the use of additively manufactured polymers with various filler materials as structural support for motor coils, and initial testing has been conducted to assess their performance.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
J. R. Olatunji, H. W. Weijers, N. M. Strickland, S. C. Wimbush
Summary: Recent advances in miniaturised cryocoolers and high-temperature superconductors have led to the development of an HTS-AF-MPD thruster for space applications. The thruster faces difficulties in thermal management due to the interaction of low-power cryocoolers and hot plasma. This paper presents a model to study the electromagnetic and thermal behavior of the thruster under these conditions.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Engineering, Electrical & Electronic
R. W. Taylor, A. E. Pantoja, T. Hlasek, J. Plechacek, H. W. Weijers, M. D. Ainslie, C. W. Bumby
Summary: Bulk REBCO high temperature superconductors are favored for electromagnetic applications. Magnetisation techniques are commonly used to measure the critical current density, Jc, while transport current techniques can directly measure the thermo-magneto-angular dependence of Ic and n. This study introduces a reproducible method for preparing a single-grain bulk GdBCO-Ag superconductor and presents measured data for Ic and n. The obtained n-values are lower than commonly assumed, highlighting the importance of accurate n-values in computational modeling.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Physics, Applied
David C. Larbalestier
Summary: Alex Mueller's discovery of superconductivity in low carrier density oxides has had significant impacts on high magnetic field technology, particularly on the use of cuprate superconductors to generate stronger magnetic fields than Nb-based low temperature superconductors. Lessons from Bednorz and Mueller's discovery highlight the importance of high current density conductors for practical applications of temperature superconductors. The use of rare earth alloy magnets made with YBCO (REBCO) has become commonplace in NMR labs, and prototype magnets made with REBCO are poised to enable compact fusion reactors.
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Ferran Valles, Anna Palau, Dmytro Abraimov, Jan Jaroszynski, Anca-Monia Constantinescu, Bernat Mundet, Xavier Obradors, David Larbalestier, Teresa Puig
Summary: Optimizing the microstructural of YBa2Cu3O7-x coated conductors is vital for enhancing the critical current. The magnetic flux pinning capabilities of these conductors vary with different regions of the magnetic field-temperature phase diagram and the orientation of the magnetic field. By investigating the critical current density in a wide temperature range and high magnetic fields, we have identified promising methods for artificially engineering YBCO coated conductors in any region of interest. Furthermore, we have identified the key factors that contribute to enhanced pinning performance at high magnetic fields and low temperatures.
COMMUNICATIONS MATERIALS
(2022)
