書誌事項
- タイトル別名
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- Development of Single-domain Annular REBCO Bulk Superconductors for Compact Cryogen-free NMR
- コガタ ムレイバイ NMRヨウ カンジョウハイコウ バルク チョウデンドウタイ ノ カイハツ
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抄録
In order to develop a compact cryogen-free 4.7-T (200 MHz) NMR magnet, we investigated methods of obtaining a homogeneous magnetic field distribution inside REBCO bulks. In this study we successfully fabricated large single-domain annular GdBCO bulk superconductors 60 mm in diameter and up to 60 mm thick. We also fabricated a large EuBCO bulk 60 mm in diameter, and evaluated the performance of these annular bulks in terms of the NMR magnet. It was found that enhancing Jc-B, increasing bulk thickness and employing an Eu element showing low magnetic permeability were effective in increasing the homogeneity of the magnetic field distribution. Furthermore, it was confirmed that a homogeneous area of magnetic distribution was obtained even at a higher field magnetization of 7 T (300 MHz) at 40 K for stacked GdBCO bulk superconductors 60 mm in diameter and 60 mm thick. Finally, several issues relating to further increasing the trapped magnetic field were discussed.
収録刊行物
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- 低温工学
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低温工学 46 (3), 131-138, 2011
公益社団法人 低温工学・超電導学会 (旧 社団法人 低温工学協会)
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詳細情報 詳細情報について
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- CRID
- 1390001204612587392
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- NII論文ID
- 10027961787
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- NII書誌ID
- AN00333419
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- ISSN
- 18800408
- 03892441
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- NDL書誌ID
- 11076152
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
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- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可