SQUID (超伝導量子干渉装置) グラディオメーター用の二重機能の超伝導シールド
Guangxin Han1, Kaiyuan Song1, Yuntao Qiu1
1National Gravitation Laboratory, MOE Key Laboratory of Fundamental Physical Quantities Measurement, and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China.
The Review of scientific instruments
|February 13, 2026
まとめ
私たちは,超伝導量子干渉装置 (SQUID) を磁気干渉から保護し,安定性を向上させるために,新しい二重機能超伝導シールドを開発しました. この実用的なソリューションにより,様々なアプリケーションにおけるSQUIDグラディオメーターの信頼性が向上します.
科学分野:
- 応用物理学 応用物理学
- 超伝導装置の超伝導装置について
- マグネトメトリー・マグネトメトリー
背景:
- 超伝導量子干渉装置 (SQUID) は,外部磁場に対して敏感な磁気計である.
- SQUIDグラディオメーターのピックアップコイルの不均衡は,測定の精度と安定性に影響を及ぼします.
- 既存のシールド方式は,動的補償に適応する能力が欠けていることが多い.
研究 の 目的:
- SQUID保護のための新しい二重機能超伝導シールドの設計と検証.
- 調整可能な軸移位によってピックアップコイルの不均衡の補償を可能にするために.
- SQUIDグラディオメーターの安定性と信頼性を向上させ,実用的な応用のために.
主な方法:
- 二重機能の超伝導シールドの設計と製造.
- プロトタイプの低温SQUIDグラディオメーター (150mmベースライン,105mm2コイル面積) との統合.
- 本質的な騒音の測定や,動くプラットフォームでの動的試験を含む実験的検証.
主要な成果:
- 0.1-1 Hzで約50 fT/m/√Hzの固有のノイズレベルを達成しました.
- ダイナミックテストで強い磁気干渉下での安定した動作が実証されています.
- SQUIDの保護とコイルの不均衡の補償における二重機能シールドの有効性を検証しました.
結論:
- 新しい二重機能の超伝導シールドは,磁気干渉からSQUIDを効果的に保護します.
- 調整可能な軸移位により,ピックアップコイルの不均衡を正確に補償できます.
- この技術は,ワイヤー巻きSQUIDグラディオメーターの実用的な強化を提供し,安定性と信頼性を向上させます.
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