Year: 2017
Type: article
Abstract: Superconducting magnets wound with second-generation high-temperature superconductors, i.e., REBa2Cu3O7-x(REBCO, RE = Rare Earth) tapes, are desired to apply high magnetic field nuclear magnetic resonance, MRI, and accelerators. However, a major problem for practical application is an undesirable irregular magnetic field caused by screening currents induced in REBCO tapes. To investigate the screening current-induced magnetic field, a few simulation methods have been proposed. One of the effective simulation methods employs a finite-element method with a thin approximation method. Although the thin approximation method was developed to simulate eddy currents in magnetic steel sheets, and it is not applicable to REBCO tapes carrying a transport current. Therefore, the thin approximation method is extended to simulate screening currents in REBCO tapes considering a carrying transport current. To show the validity of the proposed extended thin approximation method, the screening currents of an REBCO magnet are computed, and the results are compared with the measurement and simulation results of the conventional thin approximation method. The more accurate solution is available by using the proposed methods.
Source: IEEE Transactions on Magnetics
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Awards: Development of simulation tool to design high-performance SQUID magnet sencers for nano medical diagnosis(Fostering Joint International Research), Study on advanced electromagnetic analysis for high-field HTS magnet, Research on the development of simplified and compact nuclear magnetic resonance devices
OpenAlex ID: W2759996285