| A test platform consisting of a superconducting magnet, Dewar and cryogenic systems, and a mechanical testing machine 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 space for testing. The split low-temperature superconducting magnet operate in low-temperature, strong magnetic field 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 excitation and cooling processes of the coil assembly, were experimentally studied in the research applying wireless strain testing method and using instruments like cryogenic strain gauges, cryogenic thermal sensors, and Hall plates. The findings demonstrate that: strain accumulated in the coils during dynamic winding is essentially 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 during energization have a high synchronization with the excitation current. These testing offer trustworthy data for developing magnets and analyzing their operational states, that supports the creation of huge scientific device. |
