Mechanism and Suppressive Methods for Screening-current-induced Magnetic Field of REBCO Coils

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  • REBCO コイルにおける遮蔽電流磁場のメカニズムと抑制方法
  • REBCO コイル ニ オケル シャヘイ デンリュウ ジバ ノ メカニズム ト ヨクセイ ホウホウ

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Abstract

REBCO conductors were commercialized only recently in 2009 and therefore the magnet technology for REBCO conductors remains undeveloped. The major technological problems for REBCO coils encountered thus far are (a) degradation in the superconducting performance for mechanical reasons, (b) difficulty in protecting the magnet in the case of a super-normal transition of the REBCO coil and (c) the enormous effect of a screening-current-induced magnetic field. In this paper, the basic mechanism of the screening-current-induced magnetic field and effective remedies for suppressing the screening field is investigated through experiments and numerical simulations.

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