在实用的超导体中用于流量固定的统一缩放规则:III. 最少的数据集,核心参数,以及推算缩放表达式的应用
Jack W Ekin1, Najib Cheggour1,2, Loren Goodrich1,2
1National Institute of Standards and Technology, Boulder, CO 80305, USA.
概括
超导体的额外推算缩放表达式 (ESE) 准确地对超导体的临界电流数据进行插入和推算. 这种方法与现有的配合方程相比,大大减少了误差,使导体表征更有效.
科学领域:
- 超导电性 超导电性 超导电性
- 材料科学 材料科学 材料科学
- 应用物理 应用物理
背景情况:
- 精确预测临界电流 (
- 目前用于参数化统一缩放法 (USL) 的现有方法在推算准确性和易用性方面存在局限性.
研究的目的:
- 评估外推量缩放表达式 (ESE) 的准确性,用于在磁场 (B),温度 (T) 和菌株 (ε) 上插入和外推关键电流数据 (c).
- 使用统计错误分析,将ESE的性能与当前安装方程进行比较.
主要方法:
- 对固定力曲线和原始缩放数据的分析,以导出ESE,USL的参数化.
- 在92个测试案例中使用根平均平方 (RMS) 误差和分数偏差统计数据评估ESE准确性.
- 确定用于准确推断
主要成果:
- ESE可靠地将关键电流数据推断到与拟合数据集显著不同的条件,对于中等和高
导体,在12 T时有效的RMS推断误差为2-5 A.J c - 与当前在高场,温度和应变条件下适配方程相比,ESE可将百分比外推误差减少1/10至1/40.
- 插值的百分比匹配错误在ESE.中减少到1/15.
结论:
- ESE提供了一种高度准确和高效的方法,用于插入和推断超导体中的临界电流数据.
- 通过ESE,统一的温度-应变装置的测量空间可以减少五倍,并促进单独的装置的数据组合.
- 实施ESE允许从最小的数据集进行完整的导体表征,包括在某些条件下单个(B) 曲线.
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