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A simple screening current simulation method using equivalent circuit model for REBCO pancake coils

Harvard Dataverse (Africa Rice Center, Bioversity International, CCAFS, CIAT, IFPRI, IRRI and WorldFish)

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Title A simple screening current simulation method using equivalent circuit model for REBCO pancake coils
 
Identifier https://doi.org/10.7910/DVN/K5MOTG
 
Creator So Noguchi, Teki Imai, Dongkeun Park, Seungyong Hahn, Yukikazu Iwasa
 
Publisher Harvard Dataverse
 
Description 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.
 
Subject Physics
high field magnet
numerical simulation
screening current