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)
Review
Physics, Applied
Y. Yanagisawa, M. Hamada, K. Hashi, H. Maeda
Summary: This paper reviews recent developments in ultra-high field superconducting magnets for nuclear magnetic resonance in the Asia region. Examples from Japan, China, and Korea are provided, showcasing advancements in high-resolution NMR magnets using high-temperature superconductor coils. These developments have opened up future possibilities for UHF NMR magnets with features like persistent-mode operation, high operating fields, and liquid helium-free operation.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Michael Jurkutat, Carsten Kattinger, Stefan Tsankov, Richard Reznicek, Andreas Erb, Juergen Haase
Summary: High-temperature superconducting cuprates exhibit a dome-like dependence of their critical temperature (Tc) with doping, but this maximum Tc can be enhanced by applying pressure, a well-known observation for decades. In this study, we used high-pressure anvil cell NMR to investigate this phenomenon and found that pressure increases overall hole doping and leads to a redistribution of holes favoring planar O, similar to the observation of higher maximum Tc for materials with higher hole content at planar O. These results indicate that the pressure-induced enhancement of the maximum Tc points to the same mechanism.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
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
Materials Science, Multidisciplinary
X. Y. Feng, Z. Zhao, J. Luo, J. Yang, A. F. Fang, H. T. Yang, H. J. Gao, R. Zhou, Guo-qing Zheng
Summary: Clarifying the interplay between charge-density waves (CDWs) and superconductivity is important in CsV3Sb5. Under hydrostatic pressures, CDW gradually changes from a commensurate to an incommensurate modulation. The appearance of short-range CDW order and the existence of a CDW quantum critical point (QCP) at a specific pressure suggest their role in determining the maximum superconducting temperature (Tc) in CsV3Sb5.
NPJ QUANTUM MATERIALS
(2023)
Article
Physics, Applied
Jose Luis Rudeiros Fernandez, Paolo Ferracin
Summary: This paper presents a novel geometrical configuration called the uni-layer (UL) magnet, which uses an asymmetric current distribution to create a magnetic field perpendicular to an aperture within a single layer using a continuous ideal current line. The UL magnet design has advantages over existing concepts in superconducting magnets such as the cos sector magnet, stress managed cos, and canted cos, including a continuous unit length design and an increased minimum bending radius. The UL magnet design is particularly advantageous for high-temperature superconductors sensitive to strain and prone to winding degradation in high-field accelerator magnet applications requiring high efficiency and a small aperture. The paper also discusses the advantages of UL magnets in terms of design and fabrication compared to other concepts.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Xinkai Zhu, Ming Cheng, Wei Hua, Zhiheng Zhang, Xinfu Ning
Summary: A novel double-stator field-modulation high temperature superconducting electrical machine (DSFM-HTSM) is proposed, in which the armature windings and the HTS magnets are mounted on the outer and inner stator, respectively. The article focuses on the thermal loss analysis, design and test methods of the new HTS magnet system for the DSFM-HTSM. An experimental platform is built and tested to verify the validity of the thermal loss analysis and design method. The research results can lay the foundation for the development and application of the large scale DSFM-HTSM, and can provide some reference for the analysis and design of similar HTS magnet systems.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Thermodynamics
Wenxin Li, Tianhui Yang, Gengyao Li, Jianing Lu, Ying Xin
Summary: This article introduces a new energy conversion/storage device based on the unique interaction between a permanent magnet and a closed superconducting coil, which is able to efficiently convert mechanical energy to electrical energy without the need for external power supply or motor/generator. Experimental results show that this device has high efficiency and is suitable for vehicle regenerative braking, particularly meaningful for energy conservation in urban rail transportations.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Electrical & Electronic
Enrico Felcini, Jerome Harray, Tuukka Lehtinen, Diego Perini, Juan C. Perez, Gijs de Rijk, Bertrand Dutoit, Luca Bottura
Summary: This paper introduces a compact and lightweight design for hadron therapy gantries using High-Temperature Superconductors (HTS) conductors. A demonstrator based on this design has been validated and provides valuable insights for the future construction of full-scale GaToroid coils.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Engineering, Electrical & Electronic
Fangliang Dong, Dongkeun Park, Junseong Kim, Juan Bascunan, Yukikazu Iwasa
Summary: It is generally agreed that no-insulation high-temperature superconducting magnets do not quench due to the turn-to-turn energy-releasing bypass unique to them. However, unexpected quenches, known as sudden-discharging quenches, can still occur when the current suddenly drops to zero. In this study, a demonstrative coil is used to prove and simulate the dynamics of this type of quench, which is different from the commonly reported quench during charging.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Materials Science, Multidisciplinary
Youhei Iida, Masashi Sawada, Yoshiaki Sasaki, Tomoaki Tsuchiya, Takaaki Minamidate, Noriaki Matsunaga, Atsushi Kawamoto, Kazushige Nomura
Summary: Studies conducted on the quasi-one-dimensional organic conductor (DMET-TTF)(2)AuBr2 at ambient pressure revealed unique electronic and magnetic behaviors, including temperature-dependent resistivity, magnetic susceptibility, and nuclear magnetic resonance characteristics. These features reflect the interplay between antiferromagnetic transition, magnetic moment amplitude, and chain-like structure.
Article
Materials Science, Multidisciplinary
Ka Ho Wong, Mark R. R. Hirsbrunner, Jacopo Gliozzi, Arbaz Malik, Barry Bradlyn, Taylor L. L. Hughes, Dirk K. K. Morr
Summary: By custom-designing the complex structure of their magnetic layer, magnet-superconductor hybrid systems can realize higher order topological superconductivity. Using stacked magnetic structures, two-dimensional magnet-superconductor hybrid systems can be tuned between trivial and topological phases, providing a potential platform for topological quantum computing.
NPJ QUANTUM MATERIALS
(2023)
Article
Physics, Applied
Lang Qin, Lei Wang, Jianhua Liu, Kangshuai Wang, Benzhe Zhou, Hongbo Sun, Qiuliang Wang
Summary: A new equivalent circuit simulation method was introduced for the no-insulation superconducting magnet, providing a detailed analysis of current distribution. The refined circuit model was able to guide the excitation and screen current reduction of the HTS magnet through real-time simulation, showcasing its potential for more detailed mechanical analysis of REBCO magnets.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Nuclear Science & Technology
Lorenzo Giannini, Luigi Muzzi, Alfredo Portone, Gherardo Romanelli, Daniela P. Boso, Lorenzo Zoboli, Xabier Sarasola, Chiarasole Fiamozzi Zignani, Cesar Luongo, Valentina Corato, Jose Lorenzo Gomez, Christian Bachmann, Antonio della Corte
Summary: The European Roadmap to Fusion Electricity outlines the plan to complete the DEMO demonstration power plant within the next three decades, aiming for a net energy gain of Q=40. The design includes a 2 GW tokamak device with a 9 m plasma radius. The study explores the use of High Temperature Superconductors to improve the performance of the TFC winding pack and optimize the DTT central solenoid.
FUSION ENGINEERING AND DESIGN
(2023)
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)