Article
Physics, Applied
Makoto Takayasu
Summary: Research on the width-bending behaviors of a rare earth barium copper oxide (REBCO) high-temperature superconducting (HTS) tape has shown that the critical current is not significantly affected by width-bending strain, but rather by the axial strain generated through the Poisson effect. Even a 1.5% width-bending strain only degrades the critical current by 15% when the REBCO layer is bent inward, compared to over 70% when the layer is bent outward. This suggests potential for using REBCO tapes in flat-tape Rutherford-type cabling, which offers advantages in high-current, high-field applications with low AC losses and shield currents.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
Reed Teyber, Maxim Marchevsky, Aurora Cecilia Araujo Martinez, Soren Prestemon, Jeremy Weissz, Danko van der Laan
Summary: A network model is developed to simulate current and voltage distributions around defects in ReBCO tape cables. The results show that the power dissipation in the I-V curve strongly depends on the magnitude of the defect. Additionally, optimal cable layering topologies are recommended based on reel-to-reel tape measurements using a differential evolution algorithm.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Hiroyuki Yamada, Yuji Tsuchiya, Yutaka Yoshida, Toshiyuki Mito, Yuta Onodera, Naoki Hirano
Summary: This study proposes a method to improve the stability of conductors by fabricating conductive micro-paths for current sharing between REBCO tapes. The experimental results show that in REBCO conductors with conductive micro-paths, the current can bypass the damaged areas.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Physics, Fluids & Plasmas
S. Ito, H. Tamura, N. Yanagi, H. Hashizume
Summary: This paper presents the progress in electrical and mechanical performances of the mechanical joints of HTS conductors and methods to evaluate their quality for segment-fabrication of HTS helical coils. R&D of joint performance has progressed over the past decade and it shows acceptable performance for the HTS helical coils. The contact-probing current transfer length method and x-ray computer tomography scanning are promising for quality assessment of the joints and HTS tapes.
Article
Engineering, Electrical & Electronic
T. H. Nes, G. Kirby, G. de Rijk, M. Canale, L. Gentini, J. van Nugteren, A. Kario, H. H. J. ten Kate
Summary: This paper presents the design of a cloverleaf-racetrack magnet using ReBCO conductor. A new method using Bezier splines is used for the design of coil-ends. The magnet employs dual tape conductor and non-insulated coils for quench protection.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Physics, Applied
Xiaorong Wang, Timothy J. Bogdanof, Paolo Ferracin, William B. Ghiorso, Stephen A. Gourlay, Hugh C. Higley, Janakiram Kaushal Kadiyala, Soumen Kar, Reginald Lee, Linqing Luo, Maxwell A. Maruszewski, Robert Memmo, Cory S. Myers, Soren O. Prestemon, Jithin Sai Sandra, Venkat Selvamanickam, Reed Teyber, Marcos Turqueti, Yuxin Wu
Summary: This research presents the experimental results of dipole magnet development using star (R) wires, demonstrating the feasibility of these wires under high-field conditions and identifying further development needs.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Toshiyuki Mito, Yuta Onodera, Maki Otsuji, Naoki Hirano, Kazuya Takahata, Nagato Yanagi, Akifumi Iwamoto, Shinji Hamaguchi, Suguru Takada, Tomosumi Baba, Noriko Chikumoto, Akifumi Kawagoe, Ryozo Kawanami
Summary: REBCO tapes and high-purity aluminum sheets are alternately laminated to create a high-temperature superconducting (HTS) conductor for nuclear fusion experimental devices. The conductor is twisted at the end of the manufacturing process to ensure uniform current distribution and mechanical characteristics. Prototype conductors showed degradation in I-c and buckling due to local stress concentration, but improvements in manufacturing methods were able to suppress I-c degradation to 20% or less.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2021)
Article
Multidisciplinary Sciences
Shuo Li, Enric Pardo
Summary: The demagnetization of stacks of superconducting REBCO tapes due to oscillating transverse magnetic fields can be suppressed by soldering the tapes at the ends using a normal conductor.
SCIENTIFIC REPORTS
(2023)
Article
Engineering, Electrical & Electronic
H. Yu, J. Lu, J. D. Weiss, D. C. van der Laan
Summary: This experimental work presents the critical current measurements of two different REBCO cables using a test facility at NHMFL. The critical currents were determined by measuring the voltage-current traces at 4.2 K. The results have significant implications for the development and application of REBCO cables.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2022)
Article
Thermodynamics
Ho-Myung Chang, Na Hyeon Kim, Sangjun Oh
Summary: Thermodynamic optimization is conducted for gas-cooled current leads in superconducting magnets at a current level of 10-30 kA and 20 K, aiming to minimize refrigeration work. The leads consist of a combination of REBCO tapes and copper conductors, using cold helium gas for forced-flow cooling. The optimization focuses on gas-cooling conditions that can be integrated with a closed refrigeration cycle without heat intercept or boil-off loss. By considering the temperature-dependent properties of conductors, an optimal cooling-gas temperature and copper conductor size are determined to minimize required refrigeration work. The results are compared with conduction-cooled and vapor-cooled leads for 20 K magnets, and practical application procedures and design data are provided.
Article
Physics, Applied
Shixian Liu, Lei Wang, Yong Chen, Luzhong Wang, Benzhe Zhou, Xinning Hu, Junsheng Cheng, Qiuliang Wang
Summary: The Institute of Electrical Engineering, Chinese Academy of Sciences has developed a prototype metal-insulation (MI) REBCO high-temperature superconducting (HTS) magnet for use in an electrodynamic suspension (EDS) system with an acceleration of beyond 8 g. A semi-analytical method was used to analyze the dynamic electromagnetic force distribution inside the magnet, and a full-size prototype was successfully fabricated.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Nuclear Science & Technology
P. Gao, S. Q. Xue, F. Long, F. Liu, H. J. Liu, Y. Wu, J. G. Li, J. G. Qin, C. Zhou
Summary: The design and preliminary testing of the 15 T hybrid superconducting magnet was successful, demonstrating good performance and magnetic field homogeneity. The innovative design of the Nb3Sn coils allowed for achieving the expected high current and central magnetic field values.
FUSION ENGINEERING AND DESIGN
(2021)
Article
Engineering, Electrical & Electronic
Anna Vaskuri, Benoit Cure, Alexey Dudarev, Matthias Mentink
Summary: Within EP R&D, CERN is developing a high-temperature superconducting (HTS) conductor for future superconducting detector magnet projects. The conductor features a Rare-Earth Barium Copper Oxide (REBCO) tapes soldered to a copper-coated high-purity aluminium stabilizer. The critical current measurements showed good performance and repeatability, except for extreme bending of the HTS cable.
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY
(2023)
Article
Chemistry, Multidisciplinary
Michal Haubner, Patrick Krkotic, Catarina Serafim, Valentine Petit, Vincent Baglin, Sergio Calatroni, Bernard Henrist, Artur Romanov, Teresa Puig, Joffre Gutierrez
Summary: Particle accelerators with superconducting magnets use a beam screen liner to extract heat and prevent it from reaching the magnets. The beam screen surface is typically made of high-conductivity copper and provides low impedance, low electron-cloud effect, and low dynamic pressure rise. High-temperature superconductors (HTSs), specifically REBCO-CCs, are being considered to decrease the beam screen impedance and allow operation at lower temperatures. Qualification of REBCO-CCs under accelerator-like conditions is necessary. The SEY and ESD of REBCO-CCs were measured at cryogenic temperatures, showing comparable energy and dose dependencies to technical-grade metals.
APPLIED SCIENCES-BASEL
(2023)
Article
Computer Science, Information Systems
Mohammad Yazdani-Asrami, Wenjuan Song, Min Zhang, Weijia Yuan, Xiaoze Pei
Summary: This study investigated the effect of different phase angles and amplitudes of magnetic field harmonics on the magnetization loss of high temperature superconducting coated conductors (CCs), finding that the phase angle of the field harmonic has a significant impact on the magnetization loss.