This paper presents experimental and analytical results of trapped field characteristics of a stack of square YBCO thin film plates for compact NMR magnets. Each YBCO plate, 40 mm × 40 mm × 0.08 mm, has a 25-mm diameter hole at its center. A total of 500 stacked plates were used to build a 40-mm long magnet. Its trapped field, in a bath of liquid nitrogen, was measured for spatial field distribution and temporal stability. Comparison of measured and analytical results is presented: the effects on trapped field characteristics of the unsaturated nickel substrate and the non-uniform current distribution in the YBCO plate are discussed.

中文翻译：

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用于紧凑型 NMR 磁体的堆叠 YBCO 薄板的俘获场特性：空间场分布和时间稳定性

本文介绍了用于紧凑型 NMR 磁体的方形 YBCO 薄膜板堆叠的俘获场特性的实验和分析结果。每块 40 mm × 40 mm × 0.08 mm 的 YBCO 板在其中心有一个直径为 25 mm 的孔。总共使用了 500 个堆叠的板来构建一个 40 毫米长的磁铁。它在液氮浴中被捕获的场被测量为空间场分布和时间稳定性。给出了测量和分析结果的比较：讨论了对不饱和镍基板的俘获场特性和 YBCO 板中非均匀电流分布的影响。