Parametrization of the niobium thermal conductivity in the superconducting state
Parametrization of the niobium thermal conductivity in the superconducting state
复制标题
超导态铌热导率的参数化
DOI：
10.1088/0953-2048/9/6/003
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
B. Bonin
中科院分区：
文献类型：
--
作者：
F. Koechlin;B. Bonin
收集了用于深冲超导腔的铌片的热导率测量结果。由于铌样品的不同历史和宽范围的金属纯度（35 < RRR < 1750），数据表明热导率的大分散。试图获得具有实际参数的1.8 K和9.25 K之间的热导率的解析表达式。从实验数据的最小二乘拟合推导出的一组参数与作为起点的超导金属理论所产生的参数没有很大的不同。一旦确定了金属样品的RRR和过去的历史，这就有可能获得在该温度范围内铌的热导率的合理估计。
Thermal conductivity measurements of niobium sheets manufactured for deep-drawing of superconducting cavities have been gathered. Due to the differing histories of the niobium samples and a wide range of metal purities (35 < RRR < 1750), the data demonstrate a large scatter of thermal conductivities. An attempt was made to obtain an analytical expression with realistic parameters for the thermal conductivity between 1.8 K and 9.25 K. The set of parameters deduced from a least square fit of experimental data is not very different from those yielded by the theory of superconducting metals, taken as a starting point. This should make it possible to obtain a reasonable estimate of the thermal conductivity of niobium in this temperature range, once the RRR and the past history of the metal samples had been determined.