高温超伝導磁石で生成された45.5テスラ直流磁場

Seungyong Hahn^1,2, Kwanglok Kim¹, Kwangmin Kim¹

¹National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, USA.

Nature

|June 14, 2019

まとめ

研究者は高温超伝導体コイルを開発し,直流磁場45.5テスラを記録しました. 科学や産業により強力な磁場を可能にします

科学分野:

凝縮物質物理学
材料科学
超伝導性

背景:

高磁場は医学,粒子加速,核融合エネルギーにおける応用に不可欠です.
以前,最大直流磁場は45テスラで,それには巨大な抵抗磁石が必要でした.
超伝導磁石は,低消費電力を提供しますが,歴史的にフィールドの強度は制限されています.

研究の目的:

前例のない磁場を生成する超伝導体コイルを開発する
現存する45テスラDCの磁場限界を超えよう
超伝導体磁石の理論的予測を検証する

主な方法:

REBCO (REBa2Cu3Ox) でコーティングされたコンドクターテープを使用したコンパクトな高温超伝導体コイルの製造.
高温超伝導体コイルを31.1テスラレジスティブバックグラウンド磁石に統合する.
1平方ミリメートルあたり1,260アンペアの高巻電流密度で動作し,迅速な消火のための絶縁式巻電により可能である.

主要な成果:

記録的なDC磁場 45.5テスラを達成し,以前の限界を超えました.
新しい磁石システムは 14.4テスラ高温超伝導体コイルを使用しています.
達成された磁場は,以前の低温超伝導磁石のおよそ2倍である.

結論:

開発された高温超伝導体コイル技術は,かなり高い磁場を可能にします.
この進歩は科学的研究や工業的な応用においてより強力な磁石の道を開きます
結果は,超高磁場を生成する銅酸化物超伝導体の可能性を確認しました.

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