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Measurements of AC Losses in HTSC wires exposed to an alternating field using calorimetric methods

机译:使用量热法测量暴露于交变场的HTSC导线中的交流损耗

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摘要

Calorimetric methods for AC loss measurement for short superconducting wires have been investigated. The design, operation and results obtained from an experimental calorimeter are described. With these methods the total loss of a short superconducting sample exposed to a 50 Hz alternating field, both perpendicular and axial, have been measured with an accuracy of microwatts per centimeter. The sample is a 6 centimeter long (Bi,Pb)SrCaCuO-2223 silver-sheathed multifilamentary wire prepared by powder-in-tube techniques. The hysteresis part of the loss may be obtained by taking the eddy current component of the silver sheath from the total loss and by neglecting the coupling loss in the silver matrices. It is shown that the hysteresis losses are dominant in this frequency and its values correspond to the theoretical approximation
机译:已经研究了用于测量超短导线交流损耗的量热方法。描述了从实验量热仪获得的设计,操作和结果。使用这些方法,已经测量了暴露于垂直和轴向50 Hz交变电场的短超导样品的总损耗,其精确度为每厘米微瓦。样品是通过管中粉末技术制备的6厘米长(Bi,Pb)SrCaCuO-2223银鞘复丝。损耗的磁滞部分可以通过从总损耗中减去银护套的涡流分量,而忽略银矩阵中的耦合损耗来获得。结果表明,磁滞损耗在该频率中占主导地位,其值与理论近似值相对应。

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