【摘要】 由超导磁体、杜瓦、低温系统等组件搭配组成的测试平台可实现超导体的力-热-电-磁多场测试，其中超导磁体的功能是提供背景磁场。分体式低温超导磁体可在中心处产生均匀的横向磁场，且其半开放式的结构为测试提供了便利和较大的操作空间。由于分体式超导磁体运行于低温、强磁场、大电流环境中，所承载的复杂的电磁力、热应力及装配力等可能会降低其电磁性能和稳定性，因此需对磁体结构及其性能进行核验。本文综合运用低温应变片、低温热传感器及霍尔片等测试仪器，并基于无线应变测试方法开展了超导线圈的动态绕线过程、线圈组件的降温及励磁过程的实验研究。结果表明：动态绕线时线圈内积累的应变与绕线层数近似呈线性关系，且应变伴随绕制时间略有回落；通电情形下超导线圈组件的应变及其周围的磁场与加载电流有较好的同步性；线圈内的应变演化规律能够有效揭示超导磁体各个加工与测试过程的特征。更多还原

【Abstract】 The test platform,composed of components such as a superconducting magnet,Dewar,and cryogenic system can realize the force-thermal-electrical-magnetic multi-field testing of superconductors,in which the superconducting magnet functions to provide a background magnetic field.The split low-temperature superconducting magnet can generate a uniform transverse magnetic field at the center,and its semi-open structure provides convenience and large space for testing.The split low-temperature superconducting magnets operate in low-temperature,strong magnetic fields,and high-current environments,verifying the structure and performance of split low-temperature superconducting magnets is necessary because these conditions can cause the complex electromagnetic forces,thermal stresses,and assembly forces they carry to deteriorate the magnets’ electromagnetic performance and stability.The dynamic winding process of superconducting coils,as well as the excitation and cooling processes of the coil assembly,were experimentally studied in the research applying wireless strain testing method and using techniques like cryogenic strain gauges,cryogenic thermal sensors,and Hall plates.The findings demonstrate that the strain accumulated in the coils during dynamic winding is approximately linear with the number of winding layers and falls back slightly with time,and the strain of the coil assembly and the surrounding magnetic field in energized conditions have a high synchronization with the excitation current,the properties of the superconducting magnet testing and processing procedures can be efficiently revealed by the strain evolution law inside the coil.更多还原