Losses in Nb Ti multifilamentary composites subjected to a rotating magnetic induction
Losses in Nb Ti multifilamentary composites subjected to a rotating magnetic induction
复制标题
旋转磁感应作用下铌钛多丝复合材料的损耗
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
J. Renard
中科院分区：
文献类型：
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作者：
A. Février;J. Renard
本研究的目的是研究多芯超导复合材料在旋转磁感应作用下的损耗。我们设计了一种实验装置，通过测量样品在磁感应中旋转时所经历的阻尼力矩来进行损耗测量。这个扭矩与样品中发生的损失成正比。该实验装置主要由超导分裂线圈装置组成，在该装置中，样品通过装有应变片扭矩单元的旋转支架旋转。该设备可在2.5转至230转的转速范围内旋转。磁感应强度可达6T，相当于随时间变化的磁感应强度高达145T/S。测量了不同母体性质、扭距长度、直径和丝数的Nb-Ti多丝复合材料的损耗。在磁感应力角速度乘积的低值范围内，结合现有的损耗理论对实验结果进行了分析。损失的计算值在15%以内与实验值非常接近。
The purpose of the present investigation is to study losses in a superconducting multifilamentary composite submitted to a rotating magnetic induction. We have designed an experimental apparatus in which loss measurements are made by measuring the retarding torque undergone by the sample when it rotates in a magnetic induction. This torque is proportional to the losses which take place in the sample. The experimental apparatus essentially consists of a superconducting split coil arrangement in which the sample is rotated through a rotating support fitted out with a strain gauges torque cell. This equipment may be rotated in the 2.5 to 230 r.p.m. range in a magnetic induction up to 6 T, which is equivalent to time dependent magnetic induction up to 145 T/s. Measurements of losses have been made in Nb Ti multifilamentary composites which differ in the nature of the matrix, the twist pitch length, the diameter and the number of filaments. In the low values range of the product of the angular velocity by the magnetic induction, experimental results are analyzed with respect to present loss theories. Calculated values of losses are very close to experimental ones within 15%.