A simple screening current simulation method using equivalent circuit model for REBCO pancake coils
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20ja144_full.pdf
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Author(s)
Noguchi, So
Imai, Teki
Park, Dongkeun
Hahn, Seungyong
Iwasa, Yukikazu
Date Issued
August 2020
Journal
Superconducting Science and Technology
Publisher
IOP
Abstract
The screening current induced in rare-earth barium copper oxide (REBCO) tape generates an unwanted irregular magnetic field. The screening current-induced field (SCIF) is a challenging issue for MRI, NMR, and accelerators magnet composed of REBCO coils. A few FEM-based simulation methods have been proposed to estimate the SCIF; however, they require a long computation time. Recently, we have proposed a simple SCIF computation method based on the self and mutual inductances of REBCO pancake coils and screening current radial paths on the top and bottom of pancake coils. The accuracy of the proposed method is not excellent; however, the computation time is quite short. In this paper, we report an equivalent circuit model that includes the self and mutual inductances of a REBCO pancake coil and screening current radial path. Moreover, with this proposed method, we can compute the SCIF of no-insulation (NI) REBCO pancake coils, which is not the case with the previously proposed FEM-based simulation method. The proposed method has been validated by experimentation. The proposed method is available online.
Description
Submitted for publication in Superconducting Science and Technology
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Persistent DSpace Link
DOI of Published Version
doi.org/10.1088/1361-6668/abb35b
https://doi.org/10.1088/1361-6668/abb35b
